Add the Chronological

Add grouping feature
fix data-src in image macro
2026-02-16 13:39:26 +01:00 · 2026-02-13 13:14:11 +01:00 · 2026-02-13 10:24:18 +01:00 · 2026-02-13 10:10:57 +01:00 · 2026-02-09 09:23:04 +01:00 · 2026-02-04 09:53:43 +01:00
175 changed files with 27380 additions and 19 deletions
--- a/README.md
+++ b/README.md
@@ -23,8 +23,12 @@ luxtools provides DokuWiki syntax that:

 - Lists a directory's direct children (files + folders) or files matching a glob pattern
 - Renders an image thumbnail gallery (with lightbox)
+- Groups multiple `{{image>...}}` blocks in compact grid/flex layouts
 - Provides "open this folder/path" links for local workflows
 - Embeds file-backed scratchpads with a minimal inline editor (no wiki revisions)
+- Links a page to a media folder via a UUID (.pagelink), enabling a `blobs/` alias
+- Adds a Page ID download link in the page info area to fetch a `.pagelink` file
+- Renders a basic calendar widget with clickable day links to chronological pages

 It also ships a small file-serving endpoint (`lib/plugins/luxtools/file.php`) used
 to deliver files and generate cached thumbnails.
@@ -46,6 +50,13 @@ If you install this plugin manually, make sure it is installed in:

 If the folder is called differently, DokuWiki will not load it.

+This plugin uses Composer dependencies shipped inside `vendor/`.
+If dependencies are missing in your local checkout, run:
+
+```bash
+php composer.phar install
+```
+

 ## Project structure (developer notes)

@@ -96,15 +107,20 @@ Key settings:

 - **paths**
  Allowed base filesystem roots (one per line). Each root can be followed by:
-  - `A> /Alias/` (optional) alias used in wiki syntax and open links
+  - `A> Alias` (optional) alias used in wiki syntax and open links

  Example:

  ```
  /srv/share/Datascape/
-  A> /Scape/
+  A> Scape
  ```

+  Notes:
+  - Wiki syntax accepts aliases in path form (for example `Scape/sub/folder`).
+  - Open links sent to the local client service are emitted as `Alias>relative/path`
+    (for example `Scape>sub/folder`) so each client can resolve its own local root.
+
  luxtools links use the plugin endpoint:

  `lib/plugins/luxtools/file.php?root=...&file=...`
@@ -141,6 +157,24 @@ Key settings:
  URL of a local client service used by `{{open>...}}` and directory links.
  See luxtools-client.

+- **image_base_path**
+  Base filesystem path used for chronological photo integration.
+  On canonical day pages (`chronological:YYYY:MM:DD`), files that start with
+  `YYYY-MM-DD` are listed automatically.
+  If a yearly subfolder exists (for example `.../2026/`), it is preferred.
+
+- **calendar_ics_files**
+  Local calendar `.ics` files (one absolute file path per line).
+  Events are parsed by `sabre/vobject` and shown on matching chronological day pages.
+  Recurrence and exclusions from the ICS are respected. For timed entries, the
+  page stores the original timestamp and renders the visible time in the
+  browser's local timezone.
+  Multi-day events appear on each overlapping day.
+
+- **pagelink_search_depth**
+  Maximum directory depth for `.pagelink` discovery under each configured root.
+  `0` means only the root directory itself is checked.
+
 ### Template style settings

 The `{{open>...}}` links and directory “open” links use a dedicated color
@@ -206,6 +240,66 @@ Supported input examples include:
 - `2026-01-30 13:45`
 - `2026-01-30T13:45:00`

+### 0.2) Page Link: link a page to a folder
+
+Page linking uses a page-scoped UUID stored in page metadata. This UUID is used
+to link the page to a folder that contains a `.pagelink` file with the same UUID.
+
+The Page Link workflow is driven by the **Page ID link** in the page info area
+(page footer, `.docInfo`):
+
+1. **Link Page** (page has no UUID yet)
+  Creates the UUID and downloads a `.pagelink` file.
+2. **Download Link File** (page has UUID, but no linked folder found)
+  Downloads the `.pagelink` file.
+3. **Unlink Page** (page is linked)
+  Prompts for confirmation, removes the `.pagelink` file from the linked folder
+  (if found), removes the UUID from the page, and refreshes the page.
+
+After downloading the `.pagelink` file, place it into the folder you want to
+link (within your configured `paths` roots). Once DokuWiki can discover it,
+the page becomes “linked”.
+
+Once linked, you can use `blobs/` as an alias in luxtools syntax on that page,
+for example:
+
+```
+{{images>blobs/*.png}}
+{{directory>blobs/&recursive=1}}
+```
+
+### 0.3) Calendar widget
+
+Render a basic monthly calendar that links each day to canonical chronological pages:
+
+```
+{{calendar>}}
+{{calendar>2024-10}}
+```
+
+Notes:
+
+- `{{calendar>}}` renders the current month.
+- `{{calendar>YYYY-MM}}` renders a specific month.
+- Day links target `chronological:YYYY:MM:DD`.
+- Header month/year links target `chronological:YYYY:MM` and `chronological:YYYY`.
+- Prev/next month buttons update the widget in-place without a full page reload.
+- Month switches fetch server-rendered widget HTML via AJAX and replace only the widget node.
+
+### 0.4) Virtual chronological day pages
+
+When a canonical day page (for example `chronological:2026:02:13`) does not yet
+exist, luxtools renders a virtual page in normal show mode instead of the
+default "page does not exist" output.
+
+The virtual page includes:
+
+- a German-formatted heading (for example `Freitag, 13. Februar 2026`)
+- matching local calendar events from configured `.ics` files (when available)
+- matching day photos (via existing `{{images>...}}` rendering) when available
+
+The page is only created once you edit and save actual content.
+
 ### 1) List files by glob pattern

 The `{{directory>...}}` syntax (or `{{files>...}}` for backwards compatibility) can handle both directory listings and glob patterns. When a glob pattern is used, it renders as a table:
@@ -271,7 +365,52 @@ The image links to the full-size version when clicked.

 Remote images (HTTP/HTTPS URLs) are linked directly without proxying or thumbnailing.

-### 5) Open a local path/folder (best-effort)
+### 5) Group multiple image boxes compactly
+
+Use `<grouping> ... </grouping>` to arrange multiple `{{image>...}}` entries in less vertical space.
+
+```text
+<grouping>
+{{image>/Scape/photos/1.jpg|One|300}}
+{{image>/Scape/photos/2.jpg|Two|300}}
+{{image>/Scape/photos/3.jpg|Three|300}}
+{{image>/Scape/photos/4.jpg|Four|300}}
+</grouping>
+
+<grouping layout="flex" gap="0" justify="start" align="start">
+{{image>/Scape/photos/1.jpg|One|220}}
+{{image>/Scape/photos/2.jpg|Two|220}}
+{{image>/Scape/photos/3.jpg|Three|220}}
+</grouping>
+
+<grouping layout="grid" cols="3" gap="0.4rem">
+{{image>/Scape/photos/1.jpg|One|260}}
+{{image>/Scape/photos/2.jpg|Two|260}}
+{{image>/Scape/photos/3.jpg|Three|260}}
+</grouping>
+
+<grouping layout="flex" gap="0.5rem" justify="space-between" align="center">
+{{image>/Scape/photos/1.jpg|One|220}}
+{{image>/Scape/photos/2.jpg|Two|220}}
+{{image>/Scape/photos/3.jpg|Three|220}}
+</grouping>
+```
+
+Supported attributes on the opening tag:
+
+- `layout`: `flex` (default) or `grid`
+- `cols`: integer >= 1 (default `2`, used by `grid`)
+- `gap`: CSS length token such as `0`, `0.6rem`, `8px` (default `0`)
+- `justify`: `start`, `center`, `end`, `space-between`, `space-around`, `space-evenly` (default `start`)
+- `align`: `start`, `center`, `end`, `stretch`, `baseline` (default `start`)
+
+Notes:
+- The wrapper only controls layout. It adds no own border/background/frame.
+- Invalid values silently fall back to defaults.
+- Unknown attributes render a small warning string, e.g. `[grouping: unknown option(s): gpa]`.
+- Existing standalone `{{image>...}}` behavior is unchanged outside `<grouping>`.
+
+### 6) Open a local path/folder (best-effort)

 ```
 {{open>/Scape/projects|Open projects folder}}
@@ -283,7 +422,7 @@ Behaviour:
 - Prefer calling the configured local client service (open_service_url).
 - Fall back to opening a file:// URL in a new tab (often blocked by browsers).

-### 6) Scratchpads (shared, file-backed, no page revisions)
+### 7) Scratchpads (shared, file-backed, no page revisions)

 ```
 {{scratchpad>start}}
@@ -291,7 +430,7 @@ Behaviour:

 Scratchpads render the referenced file as wikitext and (when you have edit rights on the host page) provide an inline editor that saves directly to the backing file.

-### 7) Link Favicons (automatic)
+### 8) Link Favicons (automatic)

 External links automatically display the favicon of the linked website. This feature:

--- a/_test/ChronoIDTest.php
+++ b/_test/ChronoIDTest.php
@@ -0,0 +1,138 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools\test;
+
+use dokuwiki\plugin\luxtools\ChronoID;
+use DokuWikiTest;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * Chronological ID helper tests.
+ *
+ * @group plugin_luxtools
+ * @group plugins
+ */
+class ChronoIDTest extends DokuWikiTest
+{
+    protected function assertBool(bool $expected, bool $actual, string $message): void
+    {
+        if ($expected !== $actual) {
+            throw new \Exception($message);
+        }
+    }
+
+    protected function assertStringOrNull(?string $expected, ?string $actual, string $message): void
+    {
+        if ($expected !== $actual) {
+            throw new \Exception($message . ' expected=' . var_export($expected, true) . ' actual=' . var_export($actual, true));
+        }
+    }
+
+    public function testIsIsoDateValidCases(): void
+    {
+        $valid = [
+            '2024-10-24',
+            '2024-02-29',
+        ];
+
+        foreach ($valid as $date) {
+            $this->assertBool(true, ChronoID::isIsoDate($date), 'Expected valid ISO date: ' . $date);
+        }
+    }
+
+    public function testIsIsoDateInvalidCases(): void
+    {
+        $invalid = [
+            '2023-02-29',
+            '2024-13-01',
+            '2024-00-10',
+            '24-10-2024',
+            '2024/10/24',
+            '2024-10-24 12:00:00',
+            '2024-10-24T12:00:00',
+            '0000-01-01',
+        ];
+
+        foreach ($invalid as $date) {
+            $this->assertBool(false, ChronoID::isIsoDate($date), 'Expected invalid ISO date: ' . $date);
+        }
+    }
+
+    public function testDateToDayId(): void
+    {
+        $this->assertStringOrNull('chronological:2024:10:24', ChronoID::dateToDayId('2024-10-24'), 'dateToDayId failed');
+        $this->assertStringOrNull('journal:chrono:2024:10:24', ChronoID::dateToDayId('2024-10-24', 'journal:chrono'), 'dateToDayId with custom namespace failed');
+
+        $this->assertStringOrNull(null, ChronoID::dateToDayId('2024-10-24T12:00:00'), 'datetime should be rejected');
+        $this->assertStringOrNull(null, ChronoID::dateToDayId('2024-13-01'), 'invalid month should be rejected');
+        $this->assertStringOrNull(null, ChronoID::dateToDayId('2024-10-24', ''), 'empty namespace should be rejected');
+        $this->assertStringOrNull(null, ChronoID::dateToDayId('2024-10-24', 'bad namespace!'), 'invalid namespace should be rejected');
+    }
+
+    public function testCanonicalIdChecks(): void
+    {
+        $this->assertBool(true, ChronoID::isDayId('chronological:2024:10:24'), 'valid day ID should be accepted');
+        $this->assertBool(true, ChronoID::isMonthId('chronological:2024:10'), 'valid month ID should be accepted');
+        $this->assertBool(true, ChronoID::isYearId('chronological:2024'), 'valid year ID should be accepted');
+
+        $this->assertBool(false, ChronoID::isDayId('2024:10:24'), 'missing namespace should be rejected as day ID');
+        $this->assertBool(false, ChronoID::isDayId('chronological:2024-10-24'), 'hyphen date in ID should be rejected as day ID');
+        $this->assertBool(false, ChronoID::isDayId('chronological:2023:02:29'), 'invalid Gregorian day should be rejected');
+
+        $this->assertBool(false, ChronoID::isMonthId('chronological:2024:13'), 'invalid month 13 should be rejected');
+        $this->assertBool(false, ChronoID::isMonthId('chronological:2024:00'), 'invalid month 00 should be rejected');
+        $this->assertBool(false, ChronoID::isMonthId('chronological:2024-10'), 'invalid month format should be rejected');
+
+        $this->assertBool(false, ChronoID::isYearId('chronological:0000'), 'year 0000 should be rejected');
+        $this->assertBool(false, ChronoID::isYearId('chronological:24'), 'short year should be rejected');
+        $this->assertBool(false, ChronoID::isYearId('chronological:2024:10'), 'month ID should not pass as year ID');
+    }
+
+    public function testConversions(): void
+    {
+        $this->assertStringOrNull('chronological:2024:10', ChronoID::dayIdToMonthId('chronological:2024:10:24'), 'dayIdToMonthId failed');
+        $this->assertStringOrNull('chronological:2024', ChronoID::monthIdToYearId('chronological:2024:10'), 'monthIdToYearId failed');
+
+        $this->assertStringOrNull(null, ChronoID::dayIdToMonthId('chronological:2024:13:24'), 'invalid day ID should map to null month ID');
+        $this->assertStringOrNull(null, ChronoID::dayIdToMonthId('chronological:2024:10'), 'month ID should not map via dayIdToMonthId');
+        $this->assertStringOrNull(null, ChronoID::monthIdToYearId('chronological:2024:13'), 'invalid month ID should map to null year ID');
+        $this->assertStringOrNull(null, ChronoID::monthIdToYearId('chronological:2024:10:24'), 'day ID should not map via monthIdToYearId');
+    }
+
+    /**
+     * Integration-style smoke test for canonical ID matrix acceptance/rejection.
+     */
+    public function testCanonicalPageIdSmokeMatrix(): void
+    {
+        $accepted = [
+            ['day', 'chronological:2024:10:24'],
+            ['month', 'chronological:2024:10'],
+            ['year', 'chronological:2024'],
+        ];
+
+        foreach ($accepted as [$kind, $id]) {
+            if ($kind === 'day') {
+                $this->assertBool(true, ChronoID::isDayId($id), 'Expected accepted day ID: ' . $id);
+            } elseif ($kind === 'month') {
+                $this->assertBool(true, ChronoID::isMonthId($id), 'Expected accepted month ID: ' . $id);
+            } else {
+                $this->assertBool(true, ChronoID::isYearId($id), 'Expected accepted year ID: ' . $id);
+            }
+        }
+
+        $rejected = [
+            '2024:10:24',
+            'chronological:2024-10-24',
+            'chronological:2024:13:01',
+            'chronological:2024:00',
+            'chronological:0000',
+        ];
+
+        foreach ($rejected as $id) {
+            $this->assertBool(false, ChronoID::isDayId($id), 'Unexpected day ID acceptance: ' . $id);
+            $this->assertBool(false, ChronoID::isMonthId($id), 'Unexpected month ID acceptance: ' . $id);
+            $this->assertBool(false, ChronoID::isYearId($id), 'Unexpected year ID acceptance: ' . $id);
+        }
+    }
+}
--- a/_test/ChronologicalDateAutoLinkerTest.php
+++ b/_test/ChronologicalDateAutoLinkerTest.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools\test;
+
+use dokuwiki\plugin\luxtools\ChronologicalDateAutoLinker;
+use DokuWikiTest;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * Tests for extracted chronological auto-linker.
+ *
+ * @group plugin_luxtools
+ * @group plugins
+ */
+class ChronologicalDateAutoLinkerTest extends DokuWikiTest
+{
+    public function testLinksPlainTextDate(): void
+    {
+        $html = '<p>Meeting on 2024-10-24</p>';
+        $out = ChronologicalDateAutoLinker::linkHtml($html);
+
+        $decoded = urldecode($out);
+        if (strpos($decoded, 'chronological:2024:10:24') === false) {
+            throw new \Exception('Expected canonical link target not found');
+        }
+    }
+
+    public function testSkipsCodeContent(): void
+    {
+        $html = '<p>Outside 2024-10-25</p><code>Inside 2024-10-24</code>';
+        $out = ChronologicalDateAutoLinker::linkHtml($html);
+
+        $decoded = urldecode($out);
+        if (strpos($decoded, 'chronological:2024:10:25') === false) {
+            throw new \Exception('Expected outside date link not found');
+        }
+        if (strpos($decoded, 'chronological:2024:10:24') !== false) {
+            throw new \Exception('Date inside code block should not be auto-linked');
+        }
+    }
+}
--- a/_test/ChronologicalDayTemplateTest.php
+++ b/_test/ChronologicalDayTemplateTest.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools\test;
+
+use dokuwiki\plugin\luxtools\ChronologicalDayTemplate;
+use DokuWikiTest;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * Tests for German day template generation.
+ *
+ * @group plugin_luxtools
+ * @group plugins
+ */
+class ChronologicalDayTemplateTest extends DokuWikiTest
+{
+    public function testBuildForDayIdGermanHeading(): void
+    {
+        $tpl = ChronologicalDayTemplate::buildForDayId('chronological:2026:02:13');
+        if (!is_string($tpl) || $tpl === '') {
+            throw new \Exception('Expected non-empty day template');
+        }
+
+        if (strpos($tpl, '====== Freitag, 13. Februar 2026 ======') === false) {
+            throw new \Exception('Expected German formatted heading not found');
+        }
+    }
+
+    public function testBuildForDayIdRejectsInvalid(): void
+    {
+        $tpl = ChronologicalDayTemplate::buildForDayId('chronological:2026:02');
+        if ($tpl !== null) {
+            throw new \Exception('Expected null for non-day ID');
+        }
+    }
+}
--- a/_test/ChronologicalIcsEventsTest.php
+++ b/_test/ChronologicalIcsEventsTest.php
@@ -0,0 +1,222 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools\test;
+
+use dokuwiki\plugin\luxtools\ChronologicalIcsEvents;
+use DokuWikiTest;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * Tests for local ICS event parsing.
+ *
+ * @group plugin_luxtools
+ * @group plugins
+ */
+class ChronologicalIcsEventsTest extends DokuWikiTest
+{
+    public function testEventsForDateParsesAllDayAndTimedEntries(): void
+    {
+        $dir = TMP_DIR . '/chrono_ics/' . uniqid('case_', true);
+        @mkdir($dir, 0777, true);
+        $ics = $dir . '/calendar.ics';
+
+        $content = "BEGIN:VCALENDAR\n"
+            . "BEGIN:VEVENT\n"
+            . "DTSTART;VALUE=DATE:20260216\n"
+            . "SUMMARY:Ganztag Event\n"
+            . "END:VEVENT\n"
+            . "BEGIN:VEVENT\n"
+            . "DTSTART:20260216T134500\n"
+            . "SUMMARY:Termin A\n"
+            . "END:VEVENT\n"
+            . "BEGIN:VEVENT\n"
+            . "DTSTART:20260217T090000\n"
+            . "SUMMARY:Anderer Tag\n"
+            . "END:VEVENT\n"
+            . "END:VCALENDAR\n";
+        @file_put_contents($ics, $content);
+
+        $events = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-16');
+        if (count($events) !== 2) {
+            throw new \Exception('Expected 2 events for 2026-02-16, got ' . count($events));
+        }
+
+        $summaries = array_map(static fn(array $e): string => (string)$e['summary'], $events);
+        if (!in_array('Ganztag Event', $summaries, true)) {
+            throw new \Exception('Missing all-day event summary');
+        }
+        if (!in_array('Termin A', $summaries, true)) {
+            throw new \Exception('Missing timed event summary');
+        }
+
+        $timed = null;
+        foreach ($events as $event) {
+            if ((string)($event['summary'] ?? '') === 'Termin A') {
+                $timed = $event;
+                break;
+            }
+        }
+
+        if (!is_array($timed)) {
+            throw new \Exception('Timed event payload missing');
+        }
+        if (trim((string)($timed['startIso'] ?? '')) === '') {
+            throw new \Exception('Timed event should expose startIso for client-side timezone conversion');
+        }
+    }
+
+    public function testEventsForDateReadsMultipleConfiguredFiles(): void
+    {
+        $dir = TMP_DIR . '/chrono_ics/' . uniqid('multi_', true);
+        @mkdir($dir, 0777, true);
+        $ics1 = $dir . '/one.ics';
+        $ics2 = $dir . '/two.ics';
+
+        @file_put_contents($ics1, "BEGIN:VCALENDAR\nBEGIN:VEVENT\nDTSTART:20260218T100000\nSUMMARY:Eins\nEND:VEVENT\nEND:VCALENDAR\n");
+        @file_put_contents($ics2, "BEGIN:VCALENDAR\nBEGIN:VEVENT\nDTSTART:20260218T110000\nSUMMARY:Zwei\nEND:VEVENT\nEND:VCALENDAR\n");
+
+        $config = $ics1 . "\n" . $ics2;
+        $events = ChronologicalIcsEvents::eventsForDate($config, '2026-02-18');
+
+        if (count($events) !== 2) {
+            throw new \Exception('Expected 2 events from two files, got ' . count($events));
+        }
+    }
+
+    public function testEventsForDateSupportsWeeklyRecurrence(): void
+    {
+        $dir = TMP_DIR . '/chrono_ics/' . uniqid('rrule_', true);
+        @mkdir($dir, 0777, true);
+        $ics = $dir . '/recurring.ics';
+
+        $content = "BEGIN:VCALENDAR\n"
+            . "BEGIN:VEVENT\n"
+            . "UID:weekly-1\n"
+            . "DTSTART:20260205T090000\n"
+            . "RRULE:FREQ=WEEKLY;INTERVAL=1\n"
+            . "SUMMARY:Wiederkehrender Termin\n"
+            . "END:VEVENT\n"
+            . "END:VCALENDAR\n";
+        @file_put_contents($ics, $content);
+
+        $events = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-12');
+        if (count($events) < 1) {
+            throw new \Exception('Expected recurring event on 2026-02-12, got none');
+        }
+
+        $summaries = array_map(static fn(array $e): string => (string)$e['summary'], $events);
+        if (!in_array('Wiederkehrender Termin', $summaries, true)) {
+            throw new \Exception('Recurring summary not found on matching date');
+        }
+    }
+
+    public function testEventsForDateRespectsExdateForRecurringEvent(): void
+    {
+        $dir = TMP_DIR . '/chrono_ics/' . uniqid('exdate_', true);
+        @mkdir($dir, 0777, true);
+        $ics = $dir . '/recurring-exdate.ics';
+
+        $content = "BEGIN:VCALENDAR\n"
+            . "BEGIN:VEVENT\n"
+            . "UID:weekly-2\n"
+            . "DTSTART:20260205T090000\n"
+            . "RRULE:FREQ=WEEKLY;COUNT=4\n"
+            . "EXDATE:20260212T090000\n"
+            . "SUMMARY:Termin mit Ausnahme\n"
+            . "END:VEVENT\n"
+            . "END:VCALENDAR\n";
+        @file_put_contents($ics, $content);
+
+        $events = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-12');
+        $summaries = array_map(static fn(array $e): string => (string)$e['summary'], $events);
+        if (in_array('Termin mit Ausnahme', $summaries, true)) {
+            throw new \Exception('Recurring event with EXDATE should not appear on excluded day');
+        }
+    }
+
+    public function testEventsForDateKeepsUtcDateAndTimeAsIs(): void
+    {
+        $previousTimezone = date_default_timezone_get();
+        date_default_timezone_set('Europe/Berlin');
+
+        try {
+            $dir = TMP_DIR . '/chrono_ics/' . uniqid('tz_', true);
+            @mkdir($dir, 0777, true);
+            $ics = $dir . '/timezone.ics';
+
+            $content = "BEGIN:VCALENDAR\n"
+                . "BEGIN:VEVENT\n"
+                . "UID:utc-shift\n"
+                . "DTSTART:20260216T233000Z\n"
+                . "SUMMARY:UTC Spaet\n"
+                . "END:VEVENT\n"
+                . "END:VCALENDAR\n";
+            @file_put_contents($ics, $content);
+
+            $eventsOn16 = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-16');
+            $eventsOn17 = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-17');
+
+            $summaries16 = array_map(static fn(array $e): string => (string)$e['summary'], $eventsOn16);
+            $summaries17 = array_map(static fn(array $e): string => (string)$e['summary'], $eventsOn17);
+
+            if (!in_array('UTC Spaet', $summaries16, true)) {
+                throw new \Exception('UTC event should stay on its own UTC date');
+            }
+            if (in_array('UTC Spaet', $summaries17, true)) {
+                throw new \Exception('UTC event should not be shifted to next day by server timezone');
+            }
+
+            $utcEvent = null;
+            foreach ($eventsOn16 as $entry) {
+                if ((string)($entry['summary'] ?? '') === 'UTC Spaet') {
+                    $utcEvent = $entry;
+                    break;
+                }
+            }
+            if (!is_array($utcEvent)) {
+                throw new \Exception('UTC event payload missing after day match');
+            }
+            if ((string)($utcEvent['time'] ?? '') !== '23:30') {
+                throw new \Exception('UTC event time should remain unchanged (expected 23:30)');
+            }
+        } finally {
+            date_default_timezone_set($previousTimezone);
+        }
+    }
+
+    public function testEventsForDateShowsMultiDayAllDayEventOnOverlappingDays(): void
+    {
+        $dir = TMP_DIR . '/chrono_ics/' . uniqid('multiday_', true);
+        @mkdir($dir, 0777, true);
+        $ics = $dir . '/multiday.ics';
+
+        $content = "BEGIN:VCALENDAR\n"
+            . "BEGIN:VEVENT\n"
+            . "UID:multi-day-1\n"
+            . "DTSTART;VALUE=DATE:20260216\n"
+            . "DTEND;VALUE=DATE:20260218\n"
+            . "SUMMARY:Mehrtagesereignis\n"
+            . "END:VEVENT\n"
+            . "END:VCALENDAR\n";
+        @file_put_contents($ics, $content);
+
+        $eventsOn16 = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-16');
+        $eventsOn17 = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-17');
+        $eventsOn18 = ChronologicalIcsEvents::eventsForDate($ics, '2026-02-18');
+
+        $summaries16 = array_map(static fn(array $e): string => (string)$e['summary'], $eventsOn16);
+        $summaries17 = array_map(static fn(array $e): string => (string)$e['summary'], $eventsOn17);
+        $summaries18 = array_map(static fn(array $e): string => (string)$e['summary'], $eventsOn18);
+
+        if (!in_array('Mehrtagesereignis', $summaries16, true)) {
+            throw new \Exception('Multi-day all-day event should appear on start day');
+        }
+        if (!in_array('Mehrtagesereignis', $summaries17, true)) {
+            throw new \Exception('Multi-day all-day event should appear on overlapping day');
+        }
+        if (in_array('Mehrtagesereignis', $summaries18, true)) {
+            throw new \Exception('Multi-day all-day event should respect exclusive DTEND day');
+        }
+    }
+}
--- a/_test/PathTest.php
+++ b/_test/PathTest.php
@@ -115,9 +115,20 @@ EOT
    public function testMapToAliasPath()
    {
        $mapped = $this->path->mapToAliasPath('/linux/another/path/some/folder');
-        $this->assertEquals('alias/some/folder', $mapped);
+        $this->assertEquals('alias>some/folder', $mapped);
+
+        $mappedRoot = $this->path->mapToAliasPath('/linux/another/path/');
+        $this->assertEquals('alias>', $mappedRoot);

        $unmapped = $this->path->mapToAliasPath('/linux/file/path/example.txt');
        $this->assertEquals('/linux/file/path/example.txt', $unmapped);
    }
+
+    public function testMapToAliasPathLegacyAliasStyle()
+    {
+        $path = new Path("/srv/share/Datascape/\nA> /Scape/\n");
+
+        $mapped = $path->mapToAliasPath('/srv/share/Datascape/projects/demo');
+        $this->assertEquals('Scape>projects/demo', $mapped);
+    }
 }
--- a/_test/SyntaxTest.php
+++ b/_test/SyntaxTest.php
@@ -239,6 +239,101 @@ class plugin_luxtools_test extends DokuWikiTest
        $this->assertStringContainsString('height="150"', $xhtml);
    }

+    /**
+     * Grouping wrapper should use default flex mode with zero gap.
+     */
+    public function test_grouping_default_flex()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping>'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '{{image>' . $imagePath . '|Two|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $structure = [
+            'div.luxtools-grouping.luxtools-grouping--flex' => 1,
+            'div.luxtools-grouping .luxtools-imagebox' => 2,
+        ];
+        $this->structureCheck($doc, $structure);
+
+        $style = (string)$doc->find('div.luxtools-grouping')->first()->attr('style');
+        $this->assertStringContainsString('--luxtools-grouping-cols: 2', $style);
+        $this->assertStringContainsString('--luxtools-grouping-gap: 0', $style);
+        $this->assertStringContainsString('--luxtools-grouping-justify: start', $style);
+        $this->assertStringContainsString('--luxtools-grouping-align: start', $style);
+    }
+
+    /**
+     * Grouping wrapper should accept custom flex layout and gap.
+     */
+    public function test_grouping_custom_flex()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping layout="flex" gap="8px">'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '{{image>' . $imagePath . '|Two|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $structure = [
+            'div.luxtools-grouping.luxtools-grouping--flex' => 1,
+            'div.luxtools-grouping .luxtools-imagebox' => 2,
+        ];
+        $this->structureCheck($doc, $structure);
+
+        $style = (string)$doc->find('div.luxtools-grouping')->first()->attr('style');
+        $this->assertStringContainsString('--luxtools-grouping-gap: 8px', $style);
+    }
+
+    /**
+     * Grouping wrapper should accept justify and align controls.
+     */
+    public function test_grouping_justify_and_align()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping layout="flex" justify="space-between" align="center">'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '{{image>' . $imagePath . '|Two|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $style = (string)$doc->find('div.luxtools-grouping')->first()->attr('style');
+        $this->assertStringContainsString('--luxtools-grouping-justify: space-between', $style);
+        $this->assertStringContainsString('--luxtools-grouping-align: center', $style);
+    }
+
+    /**
+     * Unknown grouping attributes should render a warning string.
+     */
+    public function test_grouping_unknown_option_warning()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping gpa="0.5rem">'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $this->assertStringContainsString('[grouping: unknown option(s): gpa]', $xhtml);
+    }
+
    /**
     * Ensure the built-in file endpoint includes the host page id so file.php can
     * enforce per-page ACL.
@@ -309,4 +404,121 @@ class plugin_luxtools_test extends DokuWikiTest
        // Directory row should trigger the same behaviour as {{open>...}} for that folder
        $this->assertStringContainsString('data-path="/Scape/exampledir"', $xhtml);
    }
+
+    /**
+     * Strict ISO dates in plain text should be auto-linked to canonical day IDs.
+     */
+    public function test_auto_link_iso_date_plain_text()
+    {
+        $instructions = p_get_instructions('Meeting with John on 2024-10-24.');
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        if (strpos($xhtml, '>2024-10-24</a>') === false) {
+            throw new \Exception('Auto-link text for 2024-10-24 not found');
+        }
+
+        if (strpos(urldecode($xhtml), 'chronological:2024:10:24') === false) {
+            throw new \Exception('Auto-link target chronological:2024:10:24 not found');
+        }
+    }
+
+    /**
+     * Auto-linking must not run inside code blocks.
+     */
+    public function test_auto_link_skips_code_blocks()
+    {
+        $syntax = 'Outside date 2024-10-25.' . "\n\n" . '<code>Inside code 2024-10-24</code>';
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        if (strpos($xhtml, '>2024-10-25</a>') === false) {
+            throw new \Exception('Outside date 2024-10-25 was not auto-linked');
+        }
+
+        if (strpos(urldecode($xhtml), 'chronological:2024:10:25') === false) {
+            throw new \Exception('Outside auto-link target chronological:2024:10:25 not found');
+        }
+
+        if (strpos(urldecode($xhtml), 'chronological:2024:10:24') !== false) {
+            throw new \Exception('Date inside code block was incorrectly auto-linked');
+        }
+
+        if (strpos($xhtml, 'Inside code 2024-10-24') === false) {
+            throw new \Exception('Code block content was unexpectedly altered');
+        }
+    }
+
+    /**
+     * Calendar widget should render links to canonical day IDs.
+     */
+    public function test_calendar_widget_links_canonical_day_ids()
+    {
+        $instructions = p_get_instructions('{{calendar>2024-10}}');
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        if (strpos($xhtml, 'luxtools-calendar') === false) {
+            throw new \Exception('Calendar container not rendered');
+        }
+
+        $decoded = urldecode($xhtml);
+        if (strpos($decoded, 'chronological:2024:10:01') === false) {
+            throw new \Exception('Expected canonical day link for 2024-10-01 not found');
+        }
+        if (strpos($decoded, 'chronological:2024:10:31') === false) {
+            throw new \Exception('Expected canonical day link for 2024-10-31 not found');
+        }
+
+        if (strpos($decoded, 'chronological:2024:10') === false) {
+            throw new \Exception('Expected month link chronological:2024:10 not found in header');
+        }
+        if (strpos($decoded, 'chronological:2024') === false) {
+            throw new \Exception('Expected year link chronological:2024 not found in header');
+        }
+        if (strpos($decoded, 'chronological:2024:09') === false) {
+            throw new \Exception('Expected previous month canonical ID chronological:2024:09 not found');
+        }
+        if (strpos($decoded, 'chronological:2024:11') === false) {
+            throw new \Exception('Expected next month canonical ID chronological:2024:11 not found');
+        }
+
+        if (strpos($xhtml, 'luxtools-calendar-nav') === false) {
+            throw new \Exception('Calendar navigation container not rendered');
+        }
+
+        if (strpos($xhtml, 'luxtools-calendar-nav-button') === false) {
+            throw new \Exception('Calendar navigation buttons not rendered');
+        }
+
+        if (strpos($xhtml, 'data-luxtools-calendar="1"') === false) {
+            throw new \Exception('Calendar JS state attribute not rendered');
+        }
+        if (strpos($xhtml, 'data-luxtools-ajax-url=') === false) {
+            throw new \Exception('Calendar AJAX endpoint metadata not rendered');
+        }
+
+        if (strpos($xhtml, 'luxtools-calendar-day') === false || strpos($xhtml, '<td class="luxtools-calendar-day') === false) {
+            throw new \Exception('Calendar day cells not rendered as expected');
+        }
+    }
+
+    /**
+     * Empty calendar target should default to current month rendering.
+     */
+    public function test_calendar_widget_defaults_to_current_month()
+    {
+        $instructions = p_get_instructions('{{calendar>}}');
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        if (strpos($xhtml, 'luxtools-calendar-table') === false) {
+            throw new \Exception('Calendar table not rendered for default month');
+        }
+
+        $today = date('Y-m-d');
+        $parts = explode('-', $today);
+        $expected = 'chronological:' . $parts[0] . ':' . $parts[1] . ':' . $parts[2];
+
+        if (strpos(urldecode($xhtml), $expected) === false) {
+            throw new \Exception('Expected canonical link for current date not found: ' . $expected);
+        }
+    }
 }
--- a/action.php
+++ b/action.php
@@ -3,14 +3,23 @@
 use dokuwiki\Extension\ActionPlugin;
 use dokuwiki\Extension\Event;
 use dokuwiki\Extension\EventHandler;
+use dokuwiki\plugin\luxtools\ChronoID;
+use dokuwiki\plugin\luxtools\ChronologicalCalendarWidget;
+use dokuwiki\plugin\luxtools\ChronologicalDateAutoLinker;
+use dokuwiki\plugin\luxtools\ChronologicalDayTemplate;
+use dokuwiki\plugin\luxtools\ChronologicalIcsEvents;
+require_once(__DIR__ . '/autoload.php');

 /**
 * luxtools action plugin: register JS assets.
 */
 class action_plugin_luxtools extends ActionPlugin
 {
+    /** @var bool Guard to prevent postprocess appenders during internal renders */
+    protected static $internalRenderInProgress = false;
+
    /** @inheritdoc */
-    public function register(Doku_Event_Handler $controller)
+    public function register(EventHandler $controller)
    {
        $controller->register_hook(
            "TPL_METAHEADER_OUTPUT",
@@ -18,12 +27,48 @@ class action_plugin_luxtools extends ActionPlugin
            $this,
            "addScripts",
        );
+        $controller->register_hook(
+            "RENDERER_CONTENT_POSTPROCESS",
+            "BEFORE",
+            $this,
+            "autoLinkChronologicalDates",
+        );
+        $controller->register_hook(
+            "RENDERER_CONTENT_POSTPROCESS",
+            "BEFORE",
+            $this,
+            "appendChronologicalDayEvents",
+        );
+        $controller->register_hook(
+            "RENDERER_CONTENT_POSTPROCESS",
+            "BEFORE",
+            $this,
+            "appendChronologicalDayPhotos",
+        );
+        $controller->register_hook(
+            "COMMON_PAGETPL_LOAD",
+            "BEFORE",
+            $this,
+            "prefillChronologicalDayTemplate",
+        );
+        $controller->register_hook(
+            "TPL_ACT_RENDER",
+            "BEFORE",
+            $this,
+            "renderVirtualChronologicalDayPage",
+        );
        $controller->register_hook(
            "CSS_STYLES_INCLUDED",
            "BEFORE",
            $this,
            "addTemporaryInputStyles",
        );
+        $controller->register_hook(
+            "AJAX_CALL_UNKNOWN",
+            "BEFORE",
+            $this,
+            "handleCalendarWidgetAjax",
+        );
        $controller->register_hook(
            "TOOLBAR_DEFINE",
            "AFTER",
@@ -49,7 +94,9 @@ class action_plugin_luxtools extends ActionPlugin
            "open-service.js",
            "scratchpads.js",
            "date-fix.js",
+            "page-link.js",
            "linkfavicon.js",
+            "calendar-widget.js",
            "main.js",
        ];

@@ -61,6 +108,46 @@ class action_plugin_luxtools extends ActionPlugin
        }
    }

+    /**
+     * Serve server-rendered calendar widget HTML for month navigation.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function handleCalendarWidgetAjax(Event $event, $param)
+    {
+        if ($event->data !== 'luxtools_calendar_month') return;
+
+        $event->preventDefault();
+        $event->stopPropagation();
+
+        global $INPUT;
+
+        $year = (int)$INPUT->int('year');
+        $month = (int)$INPUT->int('month');
+        $baseNs = trim((string)$INPUT->str('base'));
+        if ($baseNs === '') {
+            $baseNs = 'chronological';
+        }
+
+        if (!ChronologicalCalendarWidget::isValidMonth($year, $month)) {
+            http_status(400);
+            echo 'Invalid month';
+            return;
+        }
+
+        $html = ChronologicalCalendarWidget::render($year, $month, $baseNs);
+        if ($html === '') {
+            http_status(500);
+            echo 'Calendar rendering failed';
+            return;
+        }
+
+        header('Content-Type: text/html; charset=utf-8');
+        echo $html;
+    }
+
    /**
     * Include temporary global input styling via css.php so @ini_* placeholders resolve.
     *
@@ -82,6 +169,378 @@ class action_plugin_luxtools extends ActionPlugin
        $event->data['files'][DOKU_PLUGIN . $plugin . '/temp-input-colors.css'] = DOKU_BASE . 'lib/plugins/' . $plugin . '/';
    }

+    /**
+     * Auto-link strict ISO dates (YYYY-MM-DD) in rendered XHTML text nodes.
+     *
+     * Excludes content inside tags where links should not be altered.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function autoLinkChronologicalDates(Event $event, $param)
+    {
+        if (!is_array($event->data)) return;
+
+        $mode = (string)($event->data[0] ?? '');
+        if ($mode !== 'xhtml') return;
+
+        $doc = $event->data[1] ?? null;
+        if (!is_string($doc) || $doc === '') return;
+        if (!preg_match('/\d{4}-\d{2}-\d{2}/', $doc)) return;
+
+        $event->data[1] = ChronologicalDateAutoLinker::linkHtml($doc);
+    }
+
+    /**
+     * Prefill new chronological day pages with a German date headline.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function prefillChronologicalDayTemplate(Event $event, $param)
+    {
+        if (!is_array($event->data)) return;
+
+        $id = (string)($event->data['id'] ?? '');
+        if ($id === '') return;
+
+        if (function_exists('cleanID')) {
+            $id = (string)cleanID($id);
+        }
+        if ($id === '') return;
+        if (!ChronoID::isDayId($id)) return;
+
+        $template = ChronologicalDayTemplate::buildForDayId($id);
+        if ($template === null || $template === '') return;
+
+        $event->data['tpl'] = $template;
+        $event->data['tplfile'] = '';
+        $event->data['doreplace'] = false;
+    }
+
+    /**
+     * Append matching date-prefixed photos to chronological day page output.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function appendChronologicalDayPhotos(Event $event, $param)
+    {
+        if (self::$internalRenderInProgress) return;
+        if (!is_array($event->data)) return;
+
+        $mode = (string)($event->data[0] ?? '');
+        if ($mode !== 'xhtml') return;
+
+        global $ACT;
+        if (!is_string($ACT) || $ACT !== 'show') return;
+
+        $doc = $event->data[1] ?? null;
+        if (!is_string($doc)) return;
+        if (str_contains($doc, 'luxtools-chronological-photos')) return;
+
+        global $ID;
+        $id = is_string($ID) ? $ID : '';
+        if ($id === '') return;
+        if (function_exists('cleanID')) {
+            $id = (string)cleanID($id);
+        }
+        if ($id === '') return;
+
+        $parts = ChronoID::parseDayId($id);
+        if ($parts === null) return;
+
+        if (!function_exists('page_exists') || !page_exists($id)) return;
+
+        $basePath = trim((string)$this->getConf('image_base_path'));
+        if ($basePath === '') return;
+
+        $dateIso = sprintf('%04d-%02d-%02d', $parts['year'], $parts['month'], $parts['day']);
+        if (!$this->hasAnyChronologicalPhotos($dateIso)) return;
+
+        $photosHtml = $this->renderChronologicalPhotosMacro($dateIso);
+        if ($photosHtml === '') return;
+
+        $event->data[1] = $doc . $photosHtml;
+    }
+
+    /**
+     * Append local calendar events to existing chronological day pages.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function appendChronologicalDayEvents(Event $event, $param)
+    {
+        static $appendInProgress = false;
+        if ($appendInProgress) return;
+        if (self::$internalRenderInProgress) return;
+
+        if (!is_array($event->data)) return;
+
+        $mode = (string)($event->data[0] ?? '');
+        if ($mode !== 'xhtml') return;
+
+        global $ACT;
+        if (!is_string($ACT) || $ACT !== 'show') return;
+
+        $doc = $event->data[1] ?? null;
+        if (!is_string($doc)) return;
+        if (str_contains($doc, 'luxtools-chronological-events')) return;
+
+        global $ID;
+        $id = is_string($ID) ? $ID : '';
+        if ($id === '') return;
+        if (function_exists('cleanID')) {
+            $id = (string)cleanID($id);
+        }
+        if ($id === '') return;
+
+        $parts = ChronoID::parseDayId($id);
+        if ($parts === null) return;
+        if (!function_exists('page_exists') || !page_exists($id)) return;
+
+        $dateIso = sprintf('%04d-%02d-%02d', $parts['year'], $parts['month'], $parts['day']);
+        $appendInProgress = true;
+        try {
+            $eventsHtml = $this->renderChronologicalEventsHtml($dateIso);
+        } finally {
+            $appendInProgress = false;
+        }
+        if ($eventsHtml === '') return;
+
+        $event->data[1] = $doc . $eventsHtml;
+    }
+
+    /**
+     * Render chronological day photos using existing {{images>...}} syntax.
+     *
+     * @param string $dateIso
+     * @return string
+     */
+    protected function renderChronologicalPhotosMacro(string $dateIso): string
+    {
+        $syntax = $this->buildChronologicalImagesSyntax($dateIso);
+        if ($syntax === '') return '';
+
+        if (self::$internalRenderInProgress) return '';
+        self::$internalRenderInProgress = true;
+
+        try {
+            $info = ['cache' => false];
+            $instructions = p_get_instructions($syntax);
+            $galleryHtml = (string)p_render('xhtml', $instructions, $info);
+        } finally {
+            self::$internalRenderInProgress = false;
+        }
+
+        if ($galleryHtml === '') return '';
+
+        $title = (string)$this->getLang('chronological_photos_title');
+        if ($title === '') $title = 'Photos';
+
+        return '<div class="luxtools-plugin luxtools-chronological-photos">'
+            . '<h2>' . hsc($title) . '</h2>'
+            . $galleryHtml
+            . '</div>';
+    }
+
+    /**
+     * Build {{images>...}} syntax for a given day.
+     *
+     * @param string $dateIso
+     * @return string
+     */
+    protected function buildChronologicalImagesSyntax(string $dateIso): string
+    {
+        $basePath = trim((string)$this->getConf('image_base_path'));
+        if ($basePath === '') return '';
+
+        $base = \dokuwiki\plugin\luxtools\Path::cleanPath($basePath);
+        if (!is_dir($base) || !is_readable($base)) return '';
+
+        $yearDir = rtrim($base, '/') . '/' . substr($dateIso, 0, 4) . '/';
+        $targetDir = (is_dir($yearDir) && is_readable($yearDir)) ? $yearDir : $base;
+
+        return '{{images>' . $targetDir . $dateIso . '*&recursive=0}}';
+    }
+
+    /**
+     * Render a virtual day page for missing chronological day IDs.
+     *
+     * Shows a German date heading and existing day photos (if any) without creating the page.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function renderVirtualChronologicalDayPage(Event $event, $param)
+    {
+        if (!is_string($event->data) || $event->data !== 'show') return;
+
+        global $ID;
+        $id = is_string($ID) ? $ID : '';
+        if ($id === '') return;
+        if (function_exists('cleanID')) {
+            $id = (string)cleanID($id);
+        }
+        if ($id === '') return;
+
+        if (!ChronoID::isDayId($id)) return;
+        if (function_exists('page_exists') && page_exists($id)) return;
+
+        $wikiText = ChronologicalDayTemplate::buildForDayId($id) ?? '';
+        if ($wikiText === '') return;
+
+        $parts = ChronoID::parseDayId($id);
+        $extraHtml = '';
+        if ($parts !== null) {
+            $dateIso = sprintf('%04d-%02d-%02d', $parts['year'], $parts['month'], $parts['day']);
+
+            $eventsHtml = $this->renderChronologicalEventsHtml($dateIso);
+            if ($eventsHtml !== '') {
+                $extraHtml .= $eventsHtml;
+            }
+
+            if ($this->hasAnyChronologicalPhotos($dateIso)) {
+                $photosHtml = $this->renderChronologicalPhotosMacro($dateIso);
+                if ($photosHtml !== '') {
+                    $extraHtml .= $photosHtml;
+                }
+            }
+        }
+
+        $editUrl = function_exists('wl') ? (string)wl($id, ['do' => 'edit']) : '';
+        $createLinkHtml = '';
+        if ($editUrl !== '') {
+            $label = (string)$this->getLang('btn_create');
+            if ($label === '') $label = 'Create this page';
+            $createLinkHtml = '<p><a href="' . hsc($editUrl) . '">✎ ' . hsc($label) . '</a></p>';
+        }
+
+        $info = ['cache' => false];
+        $instructions = p_get_instructions($wikiText);
+        $html = (string)p_render('xhtml', $instructions, $info);
+
+        echo $html . $createLinkHtml . $extraHtml;
+        $event->preventDefault();
+        $event->stopPropagation();
+    }
+
+    /**
+     * Check if there is at least one date-prefixed image for the given day.
+     *
+     * @param string $dateIso
+     * @return bool
+     */
+    protected function hasAnyChronologicalPhotos(string $dateIso): bool
+    {
+        if (!ChronoID::isIsoDate($dateIso)) return false;
+
+        $basePath = trim((string)$this->getConf('image_base_path'));
+        if ($basePath === '') return false;
+
+        $base = \dokuwiki\plugin\luxtools\Path::cleanPath($basePath);
+        if (!is_dir($base) || !is_readable($base)) return false;
+
+        $yearDir = rtrim($base, '/') . '/' . substr($dateIso, 0, 4) . '/';
+        $targetDir = (is_dir($yearDir) && is_readable($yearDir)) ? $yearDir : $base;
+
+        $pattern = rtrim($targetDir, '/') . '/' . $dateIso . '*';
+        $matches = glob($pattern) ?: [];
+        foreach ($matches as $match) {
+            if (!is_file($match)) continue;
+            $ext = strtolower(pathinfo($match, PATHINFO_EXTENSION));
+            if (in_array($ext, ['jpg', 'jpeg', 'png', 'gif', 'webp'], true)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Render local calendar events section for a given date.
+     *
+     * @param string $dateIso
+     * @return string
+     */
+    protected function renderChronologicalEventsHtml(string $dateIso): string
+    {
+        $icsConfig = (string)$this->getConf('calendar_ics_files');
+        if (trim($icsConfig) === '') return '';
+
+        $events = ChronologicalIcsEvents::eventsForDate($icsConfig, $dateIso);
+        if ($events === []) return '';
+
+        $title = (string)$this->getLang('chronological_events_title');
+        if ($title === '') $title = 'Events';
+
+        $items = '';
+        foreach ($events as $entry) {
+            $summary = trim((string)($entry['summary'] ?? ''));
+            if ($summary === '') $summary = '(ohne Titel)';
+
+            $time = trim((string)($entry['time'] ?? ''));
+            $startIso = trim((string)($entry['startIso'] ?? ''));
+            $isAllDay = (bool)($entry['allDay'] ?? false);
+
+            if ($isAllDay || $time === '') {
+                $items .= '<li>' . hsc($summary) . '</li>';
+            } else {
+                $timeHtml = '<span class="luxtools-event-time"';
+                if ($startIso !== '') {
+                    $timeHtml .= ' data-luxtools-start="' . hsc($startIso) . '"';
+                }
+                $timeHtml .= '>' . hsc($time) . '</span>';
+                $items .= '<li>' . $timeHtml . ' - ' . hsc($summary) . '</li>';
+            }
+        }
+
+        if ($items === '') return '';
+        $html = '<ul>' . $items . '</ul>';
+
+        return '<div class="luxtools-plugin luxtools-chronological-events">'
+            . '<h2>' . hsc($title) . '</h2>'
+            . $html
+            . '</div>';
+    }
+
+    /**
+     * Build wiki bullet list for local calendar events.
+     *
+     * @param string $dateIso
+     * @return string
+     */
+    protected function buildChronologicalEventsWiki(string $dateIso): string
+    {
+        $icsConfig = (string)$this->getConf('calendar_ics_files');
+        if (trim($icsConfig) === '') return '';
+
+        $events = ChronologicalIcsEvents::eventsForDate($icsConfig, $dateIso);
+        if ($events === []) return '';
+
+        $lines = [];
+        foreach ($events as $event) {
+            $summary = trim((string)($event['summary'] ?? ''));
+            if ($summary === '') $summary = '(ohne Titel)';
+            $summary = str_replace(["\n", "\r"], ' ', $summary);
+
+            $time = trim((string)($event['time'] ?? ''));
+            if ((bool)($event['allDay'] ?? false) || $time === '') {
+                $lines[] = '  * ' . $summary;
+            } else {
+                $lines[] = '  * ' . $time . ' - ' . $summary;
+            }
+        }
+
+        return implode("\n", $lines);
+    }
+
    /**
     * Add custom toolbar button for code blocks.
     *
--- a/admin/main.php
+++ b/admin/main.php
@@ -28,6 +28,9 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
        'thumb_placeholder',
        'gallery_thumb_scale',
        'open_service_url',
+        'image_base_path',
+        'calendar_ics_files',
+        'pagelink_search_depth',
    ];

    public function getMenuText($language)
@@ -85,6 +88,15 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
        $newConf['thumb_placeholder'] = $INPUT->str('thumb_placeholder');
        $newConf['gallery_thumb_scale'] = $INPUT->str('gallery_thumb_scale');
        $newConf['open_service_url'] = $INPUT->str('open_service_url');
+        $newConf['image_base_path'] = $INPUT->str('image_base_path');
+
+        $icsFiles = $INPUT->str('calendar_ics_files');
+        $icsFiles = str_replace(["\r\n", "\r"], "\n", $icsFiles);
+        $newConf['calendar_ics_files'] = $icsFiles;
+
+        $depth = (int)$INPUT->int('pagelink_search_depth');
+        if ($depth < 0) $depth = 0;
+        $newConf['pagelink_search_depth'] = $depth;

        if ($this->savePluginLocalConf($newConf)) {
            msg($this->getLang('saved'), 1);
@@ -223,6 +235,22 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
        echo '<input type="text" class="edit" name="open_service_url" value="' . hsc((string)$this->getConf('open_service_url')) . '" />';
        echo '</label><br />';

+        // image_base_path
+        echo '<label class="block"><span>' . hsc($this->getLang('image_base_path')) . '</span> ';
+        echo '<input type="text" class="edit" name="image_base_path" value="' . hsc((string)$this->getConf('image_base_path')) . '" />';
+        echo '</label><br />';
+
+        // calendar_ics_files
+        $icsFiles = $this->normalizeMultilineDisplay((string)$this->getConf('calendar_ics_files'), 'calendar_ics_files');
+        echo '<label class="block"><span>' . hsc($this->getLang('calendar_ics_files')) . '</span><br />';
+        echo '<textarea name="calendar_ics_files" rows="4" cols="80" class="edit">' . hsc($icsFiles) . '</textarea>';
+        echo '</label><br />';
+
+        // pagelink_search_depth
+        echo '<label class="block"><span>' . hsc($this->getLang('pagelink_search_depth')) . '</span> ';
+        echo '<input type="number" class="edit" min="0" name="pagelink_search_depth" value="' . hsc((string)$this->getConf('pagelink_search_depth')) . '" />';
+        echo '</label><br />';
+
        echo '<button type="submit" class="button">' . hsc($this->getLang('btn_save')) . '</button>';

        echo '</fieldset>';
--- a/autoload.php
+++ b/autoload.php
@@ -9,6 +9,11 @@
 * This file registers a minimal autoloader for the plugin namespace.
 */

+$composerAutoload = __DIR__ . '/vendor/autoload.php';
+if (is_file($composerAutoload)) {
+    require_once $composerAutoload;
+}
+
 spl_autoload_register(static function ($class) {
    $prefix = 'dokuwiki\\plugin\\luxtools\\';
    $prefixLen = strlen($prefix);
--- a/composer.json
+++ b/composer.json
@@ -0,0 +1,5 @@
+{
+    "require": {
+        "sabre/vobject": "^4.5"
+    }
+}
--- a/composer.lock
+++ b/composer.lock
@@ -0,0 +1,252 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "440454aa6bd2975652e94f60998e9adc",
+    "packages": [
+        {
+            "name": "sabre/uri",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/uri.git",
+                "reference": "38eeab6ed9eec435a2188db489d4649c56272c51"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/uri/zipball/38eeab6ed9eec435a2188db489d4649c56272c51",
+                "reference": "38eeab6ed9eec435a2188db489d4649c56272c51",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^3.64",
+                "phpstan/extension-installer": "^1.4",
+                "phpstan/phpstan": "^1.12",
+                "phpstan/phpstan-phpunit": "^1.4",
+                "phpstan/phpstan-strict-rules": "^1.6",
+                "phpunit/phpunit": "^9.6"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "lib/functions.php"
+                ],
+                "psr-4": {
+                    "Sabre\\Uri\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Functions for making sense out of URIs.",
+            "homepage": "http://sabre.io/uri/",
+            "keywords": [
+                "rfc3986",
+                "uri",
+                "url"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/uri/issues",
+                "source": "https://github.com/fruux/sabre-uri"
+            },
+            "time": "2024-09-04T15:30:08+00:00"
+        },
+        {
+            "name": "sabre/vobject",
+            "version": "4.5.8",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/vobject.git",
+                "reference": "d554eb24d64232922e1eab5896cc2f84b3b9ffb1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/vobject/zipball/d554eb24d64232922e1eab5896cc2f84b3b9ffb1",
+                "reference": "d554eb24d64232922e1eab5896cc2f84b3b9ffb1",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": "^7.1 || ^8.0",
+                "sabre/xml": "^2.1 || ^3.0 || ^4.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12 || ^1.12 || ^2.0",
+                "phpunit/php-invoker": "^2.0 || ^3.1",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.6"
+            },
+            "suggest": {
+                "hoa/bench": "If you would like to run the benchmark scripts"
+            },
+            "bin": [
+                "bin/vobject",
+                "bin/generate_vcards"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Sabre\\VObject\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Dominik Tobschall",
+                    "email": "dominik@fruux.com",
+                    "homepage": "http://tobschall.de/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Ivan Enderlin",
+                    "email": "ivan.enderlin@hoa-project.net",
+                    "homepage": "http://mnt.io/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "The VObject library for PHP allows you to easily parse and manipulate iCalendar and vCard objects",
+            "homepage": "http://sabre.io/vobject/",
+            "keywords": [
+                "availability",
+                "freebusy",
+                "iCalendar",
+                "ical",
+                "ics",
+                "jCal",
+                "jCard",
+                "recurrence",
+                "rfc2425",
+                "rfc2426",
+                "rfc2739",
+                "rfc4770",
+                "rfc5545",
+                "rfc5546",
+                "rfc6321",
+                "rfc6350",
+                "rfc6351",
+                "rfc6474",
+                "rfc6638",
+                "rfc6715",
+                "rfc6868",
+                "vCalendar",
+                "vCard",
+                "vcf",
+                "xCal",
+                "xCard"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/vobject/issues",
+                "source": "https://github.com/fruux/sabre-vobject"
+            },
+            "time": "2026-01-12T10:45:19+00:00"
+        },
+        {
+            "name": "sabre/xml",
+            "version": "4.0.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/xml.git",
+                "reference": "a89257fd188ce30e456b841b6915f27905dfdbe3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/xml/zipball/a89257fd188ce30e456b841b6915f27905dfdbe3",
+                "reference": "a89257fd188ce30e456b841b6915f27905dfdbe3",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-xmlreader": "*",
+                "ext-xmlwriter": "*",
+                "lib-libxml": ">=2.6.20",
+                "php": "^7.4 || ^8.0",
+                "sabre/uri": ">=2.0,<4.0.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^3.64",
+                "phpstan/phpstan": "^1.12",
+                "phpunit/phpunit": "^9.6"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "lib/Deserializer/functions.php",
+                    "lib/Serializer/functions.php"
+                ],
+                "psr-4": {
+                    "Sabre\\Xml\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Markus Staab",
+                    "email": "markus.staab@redaxo.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "sabre/xml is an XML library that you may not hate.",
+            "homepage": "https://sabre.io/xml/",
+            "keywords": [
+                "XMLReader",
+                "XMLWriter",
+                "dom",
+                "xml"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/xml/issues",
+                "source": "https://github.com/fruux/sabre-xml"
+            },
+            "time": "2024-09-06T08:00:55+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": {},
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {},
+    "platform-dev": {},
+    "plugin-api-version": "2.9.0"
+}
--- a/conf/default.php
+++ b/conf/default.php
@@ -34,6 +34,15 @@ $conf['gallery_thumb_scale'] = 1;
 // Local client service used by {{open>...}}.
 $conf['open_service_url'] = 'http://127.0.0.1:8765';

+// Base filesystem path for chronological photo integration.
+$conf['image_base_path'] = '';
+
+// Local calendar ICS files (one absolute file path per line).
+$conf['calendar_ics_files'] = '';
+
+// Maximum depth when searching for .pagelink files under allowed roots.
+$conf['pagelink_search_depth'] = 3;
+
 // Image syntax defaults
 $conf['default_image_width'] = 250;
 $conf['default_image_align'] = 'right'; // left|right|center
--- a/images/pagelink.svg
+++ b/images/pagelink.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M10 13a5 5 0 0 1 0-7l2-2a5 5 0 0 1 7 7l-1.5 1.5" />
+  <path d="M14 11a5 5 0 0 1 0 7l-2 2a5 5 0 0 1-7-7L6.5 11.5" />
+  <path d="M8 12h8" />
+</svg>
--- a/js/calendar-widget.js
+++ b/js/calendar-widget.js
@@ -0,0 +1,129 @@
+/* global window, document, fetch, URLSearchParams */
+
+(function () {
+  'use strict';
+
+  var Luxtools = window.Luxtools || (window.Luxtools = {});
+
+  function findCalendarRoot(target) {
+    var el = target;
+    while (el && el !== document) {
+      if (el.classList && el.classList.contains('luxtools-calendar') && el.getAttribute('data-luxtools-calendar') === '1') {
+        return el;
+      }
+      el = el.parentNode;
+    }
+    return null;
+  }
+
+  function getNextMonth(year, month, direction) {
+    var cursor = new Date(year, month - 1, 1);
+    cursor.setMonth(cursor.getMonth() + direction);
+    return {
+      year: cursor.getFullYear(),
+      month: cursor.getMonth() + 1
+    };
+  }
+
+  function parseCalendarFromHtml(html) {
+    if (!html) return null;
+
+    var wrapper = document.createElement('div');
+    wrapper.innerHTML = html;
+
+    return wrapper.querySelector('div.luxtools-calendar[data-luxtools-calendar="1"]');
+  }
+
+  function setCalendarBusy(calendar, busy) {
+    if (!calendar) return;
+
+    if (busy) {
+      calendar.setAttribute('data-luxtools-loading', '1');
+    } else {
+      calendar.removeAttribute('data-luxtools-loading');
+    }
+
+    var buttons = calendar.querySelectorAll('button.luxtools-calendar-nav-button');
+    for (var i = 0; i < buttons.length; i++) {
+      buttons[i].disabled = !!busy;
+    }
+  }
+
+  function fetchCalendarMonth(calendar, year, month) {
+    var ajaxUrl = calendar.getAttribute('data-luxtools-ajax-url') || '';
+    if (!ajaxUrl) return Promise.reject(new Error('Missing calendar ajax url'));
+
+    var baseNs = calendar.getAttribute('data-base-ns') || 'chronological';
+    var params = new URLSearchParams({
+      call: 'luxtools_calendar_month',
+      year: String(year),
+      month: String(month),
+      base: baseNs
+    });
+
+    var url = ajaxUrl + (ajaxUrl.indexOf('?') >= 0 ? '&' : '?') + params.toString();
+
+    return fetch(url, {
+      method: 'GET',
+      credentials: 'same-origin',
+      headers: {
+        'X-Requested-With': 'XMLHttpRequest'
+      }
+    }).then(function (response) {
+      if (!response.ok) {
+        throw new Error('Calendar request failed: ' + response.status);
+      }
+      return response.text();
+    });
+  }
+
+  function navigateCalendarMonth(calendar, direction) {
+    var year = parseInt(calendar.getAttribute('data-current-year') || '', 10);
+    var month = parseInt(calendar.getAttribute('data-current-month') || '', 10);
+    if (!year || !month) return;
+
+    var next = getNextMonth(year, month, direction);
+    setCalendarBusy(calendar, true);
+
+    fetchCalendarMonth(calendar, next.year, next.month)
+      .then(function (html) {
+        var replacement = parseCalendarFromHtml(html);
+        if (!replacement) {
+          throw new Error('Calendar markup missing in response');
+        }
+
+        calendar.replaceWith(replacement);
+      })
+      .catch(function () {
+        var fallbackLink = calendar.querySelector('a.luxtools-calendar-month-link');
+        if (fallbackLink && fallbackLink.href) {
+          window.location.href = fallbackLink.href;
+        }
+      })
+      .finally(function () {
+        setCalendarBusy(calendar, false);
+      });
+  }
+
+  function onCalendarClick(event) {
+    var target = event.target;
+    if (!target || !target.classList || !target.classList.contains('luxtools-calendar-nav-button')) return;
+
+    var calendar = findCalendarRoot(target);
+    if (!calendar) return;
+
+    var direction = parseInt(target.getAttribute('data-luxtools-dir') || '0', 10);
+    if (direction !== -1 && direction !== 1) return;
+
+    event.preventDefault();
+    navigateCalendarMonth(calendar, direction);
+  }
+
+  function initCalendarWidgets() {
+    document.addEventListener('click', onCalendarClick, false);
+  }
+
+  Luxtools.CalendarWidget = {
+    init: initCalendarWidgets
+  };
+})();
--- a/js/main.js
+++ b/js/main.js
@@ -8,6 +8,7 @@
  var OpenService = Luxtools.OpenService;
  var GalleryThumbnails = Luxtools.GalleryThumbnails;
  var Scratchpads = Luxtools.Scratchpads;
+  var CalendarWidget = Luxtools.CalendarWidget;

  // ============================================================
  // Click Handlers
@@ -79,12 +80,49 @@
      });
  }

+  function initChronologicalEventTimes() {
+    var nodes = document.querySelectorAll('.luxtools-event-time[data-luxtools-start]');
+    if (!nodes || nodes.length === 0) return;
+
+    var formatter;
+    try {
+      formatter = new Intl.DateTimeFormat(undefined, {
+        hour: '2-digit',
+        minute: '2-digit'
+      });
+    } catch (e) {
+      formatter = null;
+    }
+
+    for (var i = 0; i < nodes.length; i++) {
+      var node = nodes[i];
+      var raw = node.getAttribute('data-luxtools-start') || '';
+      if (!raw) continue;
+
+      var date = new Date(raw);
+      if (isNaN(date.getTime())) continue;
+
+      var label;
+      if (formatter) {
+        label = formatter.format(date);
+      } else {
+        var hh = String(date.getHours()).padStart(2, '0');
+        var mm = String(date.getMinutes()).padStart(2, '0');
+        label = hh + ':' + mm;
+      }
+
+      node.textContent = label;
+    }
+  }
+
  // ============================================================
  // Initialize
  // ============================================================
  document.addEventListener('click', onClick, false);
  document.addEventListener('DOMContentLoaded', function () {
    if (GalleryThumbnails && GalleryThumbnails.init) GalleryThumbnails.init();
+    initChronologicalEventTimes();
+    if (CalendarWidget && CalendarWidget.init) CalendarWidget.init();
  }, false);
  document.addEventListener('DOMContentLoaded', function () {
    if (Scratchpads && Scratchpads.init) Scratchpads.init();
--- a/js/page-link.js
+++ b/js/page-link.js
@@ -0,0 +1,180 @@
+/* global window, document */
+
+(function () {
+  'use strict';
+
+  function getSectok() {
+    try {
+      if (window.JSINFO && window.JSINFO.sectok) return String(window.JSINFO.sectok);
+    } catch (e) {}
+
+    try {
+      var inp = document.querySelector('input[name="sectok"], input[name="securitytoken"]');
+      if (inp && inp.value) return String(inp.value);
+    } catch (e2) {}
+
+    return '';
+  }
+
+  function getPageId() {
+    try {
+      if (window.JSINFO && window.JSINFO.id) return String(window.JSINFO.id);
+    } catch (e) {}
+
+    try {
+      var input = document.querySelector('input[name="id"]');
+      if (input && input.value) return String(input.value);
+    } catch (e2) {}
+
+    return '';
+  }
+
+  function getBaseUrl() {
+    try {
+      if (window.DOKU_BASE) return String(window.DOKU_BASE);
+    } catch (e) {}
+
+    try {
+      if (window.JSINFO && window.JSINFO.base) return String(window.JSINFO.base);
+    } catch (e2) {}
+
+    return '/';
+  }
+
+  function requestPageLink(cmd, params) {
+    var pageId = getPageId();
+    if (!pageId) return Promise.reject(new Error('missing page id'));
+
+    var endpoint = getBaseUrl() + 'lib/plugins/luxtools/pagelink.php';
+
+    var payload = new window.URLSearchParams();
+    payload.set('cmd', cmd);
+    payload.set('id', pageId);
+    if (params && typeof params === 'object') {
+      Object.keys(params).forEach(function (key) {
+        payload.set(key, String(params[key]));
+      });
+    }
+
+    return window.fetch(endpoint, {
+      method: 'POST',
+      credentials: 'same-origin',
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8' },
+      body: payload.toString()
+    }).then(function (res) {
+      return res.json().catch(function () { return null; }).then(function (body) {
+        if (!res.ok || !body || body.ok !== true) {
+          throw new Error('request failed');
+        }
+        return body;
+      });
+    });
+  }
+
+  function ensurePageLink() {
+    return requestPageLink('ensure', { sectok: getSectok() });
+  }
+
+  function unlinkPageLink() {
+    return requestPageLink('unlink', { sectok: getSectok() });
+  }
+
+  function triggerDownload(pageId) {
+    try {
+      var endpoint = getBaseUrl() + 'lib/plugins/luxtools/pagelink.php';
+      var href = endpoint + '?cmd=download&id=' + encodeURIComponent(pageId);
+
+      var a = document.createElement('a');
+      a.href = href;
+      a.download = '.pagelink';
+      a.style.display = 'none';
+      document.body.appendChild(a);
+      a.click();
+      document.body.removeChild(a);
+    } catch (e) {
+      // ignore
+    }
+  }
+
+  function fetchPageLinkInfo(pageId) {
+    if (!pageId) return Promise.reject(new Error('missing page id'));
+
+    var endpoint = getBaseUrl() + 'lib/plugins/luxtools/pagelink.php';
+    var query = endpoint + '?cmd=info&id=' + encodeURIComponent(pageId);
+
+    return window.fetch(query, {
+      method: 'GET',
+      credentials: 'same-origin'
+    }).then(function (res) {
+      return res.json().catch(function () { return null; }).then(function (body) {
+        if (!res.ok || !body || body.ok !== true) {
+          throw new Error('request failed');
+        }
+        return body;
+      });
+    });
+  }
+
+  function attachDocInfoLink() {
+    var container = document.querySelector('.docInfo');
+    if (!container || !container.getAttribute) return;
+    if (container.getAttribute('data-luxtools-pagelink-docinfo') === '1') return;
+    container.setAttribute('data-luxtools-pagelink-docinfo', '1');
+
+    var pageId = getPageId();
+    if (!pageId) return;
+
+    fetchPageLinkInfo(pageId).then(function (info) {
+      var link = document.createElement('a');
+      link.href = '#';
+
+      if (!info || !info.uuid) {
+        link.textContent = 'Link Page';
+        link.addEventListener('click', function (e) {
+          e.preventDefault();
+          ensurePageLink().then(function (res) {
+            if (!res || !res.uuid) throw new Error('no uuid');
+            triggerDownload(pageId);
+          }).catch(function (err) {
+            if (window.console && window.console.warn) {
+              window.console.warn('PageLink ensure failed:', err);
+            }
+          });
+        });
+      } else if (info.linked) {
+        link.textContent = 'Unlink Page';
+        link.addEventListener('click', function (e) {
+          e.preventDefault();
+          if (!window.confirm('Unlink page?')) return;
+          unlinkPageLink().then(function () {
+            window.setTimeout(function () {
+              try { window.location.reload(); } catch (e2) {}
+            }, 400);
+          }).catch(function (err) {
+            if (window.console && window.console.warn) {
+              window.console.warn('PageLink unlink failed:', err);
+            }
+          });
+        });
+      } else {
+        link.textContent = 'Download Link File';
+        link.addEventListener('click', function (e) {
+          e.preventDefault();
+          triggerDownload(pageId);
+        });
+      }
+
+      var first = container.firstChild;
+      container.insertBefore(link, first);
+      if (first) {
+        container.insertBefore(document.createTextNode(' · '), first);
+      }
+    }).catch(function () {
+      // ignore failures
+    });
+  }
+
+  document.addEventListener('DOMContentLoaded', function () {
+    attachDocInfoLink();
+  }, false);
+})();
--- a/lang/de/lang.php
+++ b/lang/de/lang.php
@@ -62,6 +62,12 @@ $lang["gallery_thumb_scale"] =
    "Skalierungsfaktor für Galerie-Thumbnails. 2 erzeugt schärfere Thumbnails auf HiDPI-Displays (Anzeige bleibt 150×150).";
 $lang["open_service_url"] =
    "URL des lokalen Client-Dienstes für {{open>...}} (z.B. http://127.0.0.1:8765).";
+$lang["image_base_path"] =
+    "Basis-Dateisystempfad für die chronologische Foto-Integration.";
+$lang["calendar_ics_files"] =
+    "Lokale Kalender-.ics-Dateien (ein absoluter Dateipfad pro Zeile).";
+$lang["pagelink_search_depth"] =
+    "Maximale Verzeichnisebene für .pagelink-Suche (0 = nur Root).";

 $lang["scratchpad_edit"] = "Scratchpad bearbeiten";
 $lang["scratchpad_save"] = "Speichern";
@@ -73,3 +79,9 @@ $lang["scratchpad_err_unreadable"] = "Scratchpad-Datei ist nicht lesbar";

 $lang["toolbar_code_title"] = "Code-Block";
 $lang["toolbar_code_sample"] = "Ihr Code hier";
+$lang["toolbar_datefix_title"] = "Datums-Fix";
+$lang["toolbar_datefix_all_title"] = "Datums-Fix (Alle)";
+$lang["pagelink_unlinked"] = "Seite nicht verknüpft";
+$lang["pagelink_multi_warning"] = "Mehrere Ordner verknüpft";
+$lang["chronological_photos_title"] = "Fotos";
+$lang["chronological_events_title"] = "Termine";
--- a/lang/de/settings.php
+++ b/lang/de/settings.php
@@ -26,3 +26,5 @@ $lang["thumb_placeholder"] = "MediaManager-ID fuer den Platzhalter der Galerie-T
 $lang["gallery_thumb_scale"] = "Skalierungsfaktor fuer Galerie-Thumbnails. 2 erzeugt schaerfere Thumbnails auf HiDPI-Displays (Anzeige bleibt 150x150).";

 $lang["open_service_url"] = "URL des lokalen Client-Dienstes fuer {{open>...}} (z.B. http://127.0.0.1:8765).";
+
+$lang["pagelink_search_depth"] = "Maximale Verzeichnisebene fuer .pagelink-Suche (0 = nur Root).";
--- a/lang/en/lang.php
+++ b/lang/en/lang.php
@@ -62,6 +62,12 @@ $lang["gallery_thumb_scale"] =
    "Gallery thumbnail scale factor. Use 2 for sharper thumbnails on HiDPI screens (still displayed as 150×150).";
 $lang["open_service_url"] =
    "Local client service URL for the {{open>...}} button (e.g. http://127.0.0.1:8765).";
+$lang["image_base_path"] =
+    "Base filesystem path for chronological photo integration.";
+$lang["calendar_ics_files"] =
+    "Local calendar .ics files (one absolute file path per line).";
+$lang["pagelink_search_depth"] =
+    "Maximum directory depth for .pagelink search (0 = only root).";

 $lang["scratchpad_edit"] = "Edit scratchpad";
 $lang["scratchpad_save"] = "Save";
@@ -75,3 +81,8 @@ $lang["toolbar_code_title"] = "Code Block";
 $lang["toolbar_code_sample"] = "your code here";
 $lang["toolbar_datefix_title"] = "Date Fix";
 $lang["toolbar_datefix_all_title"] = "Date Fix (All)";
+$lang["pagelink_unlinked"] = "Page not linked";
+$lang["pagelink_multi_warning"] = "Multiple folders linked";
+$lang["calendar_err_badmonth"] = "Invalid calendar month. Use YYYY-MM.";
+$lang["chronological_photos_title"] = "Photos";
+$lang["chronological_events_title"] = "Events";
--- a/lang/en/settings.php
+++ b/lang/en/settings.php
@@ -26,3 +26,5 @@ $lang['thumb_placeholder'] = 'MediaManager ID for the gallery thumbnail placehol
 $lang['gallery_thumb_scale'] = 'Gallery thumbnail scale factor. Use 2 for sharper thumbnails on HiDPI screens (still displayed as 150×150).';

 $lang['open_service_url'] = 'Local client service URL for the {{open>...}} link (e.g. http://127.0.0.1:8765).';
+
+$lang['pagelink_search_depth'] = 'Maximum directory depth for .pagelink search (0 = only root).';
--- a/pagelink.php
+++ b/pagelink.php
@@ -0,0 +1,168 @@
+<?php
+
+// phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols
+
+use dokuwiki\plugin\luxtools\PageLink;
+
+require_once(__DIR__ . '/autoload.php');
+
+if (!defined('DOKU_INC')) define('DOKU_INC', __DIR__ . '/../../../');
+require_once(DOKU_INC . 'inc/init.php');
+
+global $INPUT;
+
+$syntax = plugin_load('syntax', 'luxtools');
+if (!$syntax) {
+    http_status(500);
+    header('Content-Type: application/json');
+    echo json_encode(['ok' => false, 'error' => 'plugin disabled']);
+    exit;
+}
+
+/**
+ * Send a JSON response.
+ *
+ * @param int $status
+ * @param array $payload
+ * @return void
+ */
+function luxtools_pagelink_json(int $status, array $payload): void
+{
+    http_status($status);
+    header('Content-Type: application/json; charset=utf-8');
+    header('Cache-Control: no-store, no-cache, must-revalidate');
+    header('Pragma: no-cache');
+    echo json_encode($payload);
+    exit;
+}
+
+$cmd = (string)$INPUT->str('cmd');
+$pageId = (string)$INPUT->str('id');
+if (function_exists('cleanID')) {
+    $pageId = (string)cleanID($pageId);
+}
+
+if ($cmd === '' || $pageId === '') {
+    luxtools_pagelink_json(400, ['ok' => false, 'error' => 'missing parameters']);
+}
+
+if (!function_exists('auth_quickaclcheck')) {
+    luxtools_pagelink_json(403, ['ok' => false, 'error' => 'forbidden']);
+}
+
+$acl = auth_quickaclcheck($pageId);
+if ($cmd === 'info' || $cmd === 'download') {
+    if (!defined('AUTH_READ') || $acl < AUTH_READ) {
+        luxtools_pagelink_json(403, ['ok' => false, 'error' => 'forbidden']);
+    }
+} else {
+    if (!defined('AUTH_EDIT') || $acl < AUTH_EDIT) {
+        luxtools_pagelink_json(403, ['ok' => false, 'error' => 'forbidden']);
+    }
+}
+
+if ($cmd === 'info') {
+    $depth = (int)$syntax->getConf('pagelink_search_depth');
+    if ($depth < 0) $depth = 0;
+
+    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
+    $uuid = $pageLink->getPageUuid($pageId);
+    if ($uuid === null) {
+        luxtools_pagelink_json(200, [
+            'ok' => true,
+            'uuid' => null,
+            'linked' => false,
+            'folder' => null,
+            'multiple' => false,
+        ]);
+    }
+
+    $info = $pageLink->resolveUuid($uuid);
+    $folder = $info['folder'] ?? null;
+    $multiple = !empty($info['multiple']);
+
+    luxtools_pagelink_json(200, [
+        'ok' => true,
+        'uuid' => $uuid,
+        'linked' => is_string($folder) && $folder !== '',
+        'folder' => is_string($folder) ? $folder : null,
+        'multiple' => $multiple,
+    ]);
+}
+
+if ($cmd === 'download') {
+    $depth = (int)$syntax->getConf('pagelink_search_depth');
+    if ($depth < 0) $depth = 0;
+
+    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
+    $uuid = $pageLink->getPageUuid($pageId);
+    if ($uuid === null || $uuid === '') {
+        http_status(404);
+        header('Content-Type: text/plain; charset=utf-8');
+        header('Cache-Control: no-store, no-cache, must-revalidate');
+        header('Pragma: no-cache');
+        echo 'not linked';
+        exit;
+    }
+
+    http_status(200);
+    header('Content-Type: text/plain; charset=utf-8');
+    header('Content-Disposition: attachment; filename=".pagelink"; filename*=UTF-8\'\'%2Epagelink');
+    header('Cache-Control: no-store, no-cache, must-revalidate');
+    header('Pragma: no-cache');
+    echo $uuid;
+    exit;
+}
+
+if ($cmd === 'ensure') {
+    if (strtoupper($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST') {
+        luxtools_pagelink_json(405, ['ok' => false, 'error' => 'method not allowed']);
+    }
+
+    if (!checkSecurityToken()) {
+        luxtools_pagelink_json(403, ['ok' => false, 'error' => 'bad token']);
+    }
+
+    $depth = (int)$syntax->getConf('pagelink_search_depth');
+    if ($depth < 0) $depth = 0;
+
+    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
+    $uuid = $pageLink->getPageUuid($pageId);
+
+    if ($uuid !== null) {
+        luxtools_pagelink_json(200, ['ok' => true, 'uuid' => $uuid, 'created' => false]);
+    }
+
+    $uuid = PageLink::createUuidV4();
+    $ok = $pageLink->setPageUuid($pageId, $uuid);
+
+    if (!$ok) {
+        luxtools_pagelink_json(500, ['ok' => false, 'error' => 'save failed']);
+    }
+
+    luxtools_pagelink_json(200, ['ok' => true, 'uuid' => $uuid, 'created' => true]);
+}
+
+if ($cmd === 'unlink') {
+    if (strtoupper($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST') {
+        luxtools_pagelink_json(405, ['ok' => false, 'error' => 'method not allowed']);
+    }
+
+    if (!checkSecurityToken()) {
+        luxtools_pagelink_json(403, ['ok' => false, 'error' => 'bad token']);
+    }
+
+    $depth = (int)$syntax->getConf('pagelink_search_depth');
+    if ($depth < 0) $depth = 0;
+
+    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
+    $result = $pageLink->unlinkPage($pageId);
+
+    luxtools_pagelink_json(200, [
+        'ok' => true,
+        'uuid' => $result['uuid'] ?? null,
+        'folder' => $result['folder'] ?? null,
+    ]);
+}
+
+luxtools_pagelink_json(400, ['ok' => false, 'error' => 'unknown command']);
--- a/src/ChronoID.php
+++ b/src/ChronoID.php
@@ -0,0 +1,241 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Helper for canonical chronological page IDs.
+ *
+ * Canonical structure:
+ * - Day:   baseNs:YYYY:MM:DD
+ * - Month: baseNs:YYYY:MM
+ * - Year:  baseNs:YYYY
+ *
+ * Date input format:
+ * - Strict ISO date only: YYYY-MM-DD
+ */
+class ChronoID
+{
+    /**
+     * Check if a string is a strict ISO date and a valid Gregorian date.
+     *
+     * @param string $value
+     * @return bool
+     */
+    public static function isIsoDate(string $value): bool
+    {
+        return self::parseIsoDate($value) !== null;
+    }
+
+    /**
+     * Convert YYYY-MM-DD to canonical day page ID.
+     *
+     * @param string $value Date in strict YYYY-MM-DD format
+     * @param string $baseNs Base namespace, default chronological
+     * @return string|null Canonical day ID or null on invalid input
+     */
+    public static function dateToDayId(string $value, string $baseNs = 'chronological'): ?string
+    {
+        $parts = self::parseIsoDate($value);
+        if ($parts === null) return null;
+
+        $ns = self::normalizeBaseNs($baseNs);
+        if ($ns === null) return null;
+
+        [$year, $month, $day] = $parts;
+        return sprintf('%s:%04d:%02d:%02d', $ns, $year, $month, $day);
+    }
+
+    /**
+     * Check whether a page ID is a canonical day ID.
+     *
+     * @param string $id
+     * @param string $baseNs
+     * @return bool
+     */
+    public static function isDayId(string $id, string $baseNs = 'chronological'): bool
+    {
+        return self::parseDayId($id, $baseNs) !== null;
+    }
+
+    /**
+     * Check whether a page ID is a canonical month ID.
+     *
+     * @param string $id
+     * @param string $baseNs
+     * @return bool
+     */
+    public static function isMonthId(string $id, string $baseNs = 'chronological'): bool
+    {
+        return self::parseMonthId($id, $baseNs) !== null;
+    }
+
+    /**
+     * Check whether a page ID is a canonical year ID.
+     *
+     * @param string $id
+     * @param string $baseNs
+     * @return bool
+     */
+    public static function isYearId(string $id, string $baseNs = 'chronological'): bool
+    {
+        return self::parseYearId($id, $baseNs) !== null;
+    }
+
+    /**
+     * Convert canonical day ID to canonical month ID.
+     *
+     * @param string $dayId
+     * @param string $baseNs
+     * @return string|null
+     */
+    public static function dayIdToMonthId(string $dayId, string $baseNs = 'chronological'): ?string
+    {
+        $parts = self::parseDayId($dayId, $baseNs);
+        if ($parts === null) return null;
+
+        $ns = self::normalizeBaseNs($baseNs);
+        if ($ns === null) return null;
+
+        return sprintf('%s:%04d:%02d', $ns, $parts['year'], $parts['month']);
+    }
+
+    /**
+     * Convert canonical month ID to canonical year ID.
+     *
+     * @param string $monthId
+     * @param string $baseNs
+     * @return string|null
+     */
+    public static function monthIdToYearId(string $monthId, string $baseNs = 'chronological'): ?string
+    {
+        $parts = self::parseMonthId($monthId, $baseNs);
+        if ($parts === null) return null;
+
+        $ns = self::normalizeBaseNs($baseNs);
+        if ($ns === null) return null;
+
+        return sprintf('%s:%04d', $ns, $parts['year']);
+    }
+
+    /**
+     * Parse canonical day ID.
+     *
+     * @param string $id
+     * @param string $baseNs
+     * @return array{year:int,month:int,day:int}|null
+     */
+    public static function parseDayId(string $id, string $baseNs = 'chronological'): ?array
+    {
+        $ns = self::normalizeBaseNs($baseNs);
+        if ($ns === null) return null;
+
+        $id = trim($id);
+        $pattern = '/^' . preg_quote($ns, '/') . ':(\d{4}):(\d{2}):(\d{2})$/';
+        if (!preg_match($pattern, $id, $matches)) return null;
+
+        $year = (int)$matches[1];
+        $month = (int)$matches[2];
+        $day = (int)$matches[3];
+        if ($year < 1) return null;
+        if (!checkdate($month, $day, $year)) return null;
+
+        return [
+            'year' => $year,
+            'month' => $month,
+            'day' => $day,
+        ];
+    }
+
+    /**
+     * Parse canonical month ID.
+     *
+     * @param string $id
+     * @param string $baseNs
+     * @return array{year:int,month:int}|null
+     */
+    public static function parseMonthId(string $id, string $baseNs = 'chronological'): ?array
+    {
+        $ns = self::normalizeBaseNs($baseNs);
+        if ($ns === null) return null;
+
+        $id = trim($id);
+        $pattern = '/^' . preg_quote($ns, '/') . ':(\d{4}):(\d{2})$/';
+        if (!preg_match($pattern, $id, $matches)) return null;
+
+        $year = (int)$matches[1];
+        $month = (int)$matches[2];
+        if ($year < 1) return null;
+        if ($month < 1 || $month > 12) return null;
+
+        return [
+            'year' => $year,
+            'month' => $month,
+        ];
+    }
+
+    /**
+     * Parse canonical year ID.
+     *
+     * @param string $id
+     * @param string $baseNs
+     * @return array{year:int}|null
+     */
+    public static function parseYearId(string $id, string $baseNs = 'chronological'): ?array
+    {
+        $ns = self::normalizeBaseNs($baseNs);
+        if ($ns === null) return null;
+
+        $id = trim($id);
+        $pattern = '/^' . preg_quote($ns, '/') . ':(\d{4})$/';
+        if (!preg_match($pattern, $id, $matches)) return null;
+
+        $year = (int)$matches[1];
+        if ($year < 1) return null;
+
+        return ['year' => $year];
+    }
+
+    /**
+     * Parse strict ISO date YYYY-MM-DD.
+     *
+     * @param string $value
+     * @return int[]|null [year, month, day] or null
+     */
+    protected static function parseIsoDate(string $value): ?array
+    {
+        $value = trim($value);
+        if (!preg_match('/^(\d{4})-(\d{2})-(\d{2})$/', $value, $matches)) {
+            return null;
+        }
+
+        $year = (int)$matches[1];
+        $month = (int)$matches[2];
+        $day = (int)$matches[3];
+
+        if ($year < 1) return null;
+        if (!checkdate($month, $day, $year)) return null;
+
+        return [$year, $month, $day];
+    }
+
+    /**
+     * Normalize and validate base namespace.
+     *
+     * Allows one or more namespace segments with characters [a-z0-9_-].
+     *
+     * @param string $baseNs
+     * @return string|null
+     */
+    protected static function normalizeBaseNs(string $baseNs): ?string
+    {
+        $baseNs = strtolower(trim($baseNs));
+        $baseNs = trim($baseNs, ':');
+        if ($baseNs === '') return null;
+
+        if (!preg_match('/^[a-z0-9][a-z0-9_-]*(?::[a-z0-9][a-z0-9_-]*)*$/', $baseNs)) {
+            return null;
+        }
+
+        return $baseNs;
+    }
+}
--- a/src/ChronologicalCalendarWidget.php
+++ b/src/ChronologicalCalendarWidget.php
@@ -0,0 +1,143 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Render the chronological calendar widget markup.
+ */
+class ChronologicalCalendarWidget
+{
+    /**
+     * Render full calendar widget HTML for one month.
+     *
+     * @param int $year
+     * @param int $month
+     * @param string $baseNs
+     * @return string
+     */
+    public static function render(int $year, int $month, string $baseNs = 'chronological'): string
+    {
+        if (!self::isValidMonth($year, $month)) return '';
+
+        $firstDayTs = mktime(0, 0, 0, $month, 1, $year);
+        $daysInMonth = (int)date('t', $firstDayTs);
+        $firstWeekday = (int)date('N', $firstDayTs); // 1..7 (Mon..Sun)
+
+        $monthCursor = \DateTimeImmutable::createFromFormat('!Y-n-j', sprintf('%04d-%d-1', $year, $month));
+        if (!($monthCursor instanceof \DateTimeImmutable)) return '';
+
+        $prevMonth = $monthCursor->sub(new \DateInterval('P1M'));
+        $nextMonth = $monthCursor->add(new \DateInterval('P1M'));
+
+        $monthStartDate = sprintf('%04d-%02d-01', $year, $month);
+        $monthDayId = ChronoID::dateToDayId($monthStartDate, $baseNs);
+        $monthId = $monthDayId !== null ? ChronoID::dayIdToMonthId($monthDayId, $baseNs) : null;
+        $yearId = $monthId !== null ? ChronoID::monthIdToYearId($monthId, $baseNs) : null;
+
+        $prevStartDate = $prevMonth->format('Y-m-d');
+        $prevDayId = ChronoID::dateToDayId($prevStartDate, $baseNs);
+        $prevMonthId = $prevDayId !== null ? ChronoID::dayIdToMonthId($prevDayId, $baseNs) : null;
+
+        $nextStartDate = $nextMonth->format('Y-m-d');
+        $nextDayId = ChronoID::dateToDayId($nextStartDate, $baseNs);
+        $nextMonthId = $nextDayId !== null ? ChronoID::dayIdToMonthId($nextDayId, $baseNs) : null;
+
+        $leadingEmpty = $firstWeekday - 1;
+        $totalCells = (int)ceil(($leadingEmpty + $daysInMonth) / 7) * 7;
+
+        $todayY = (int)date('Y');
+        $todayM = (int)date('m');
+        $todayD = (int)date('d');
+
+        $dayUrlTemplate = function_exists('wl') ? (string)wl('__LUXTOOLS_ID_RAW__') : '';
+        $monthUrlTemplate = $dayUrlTemplate;
+        $yearUrlTemplate = $dayUrlTemplate;
+        $ajaxUrl = defined('DOKU_BASE') ? (string)DOKU_BASE . 'lib/exe/ajax.php' : 'lib/exe/ajax.php';
+
+        $html = '<div class="luxtools-plugin luxtools-calendar" data-luxtools-calendar="1"'
+            . ' data-base-ns="' . hsc($baseNs) . '"'
+            . ' data-current-year="' . hsc((string)$year) . '"'
+            . ' data-current-month="' . hsc(sprintf('%02d', $month)) . '"'
+            . ' data-day-url-template="' . hsc($dayUrlTemplate) . '"'
+            . ' data-month-url-template="' . hsc($monthUrlTemplate) . '"'
+            . ' data-year-url-template="' . hsc($yearUrlTemplate) . '"'
+            . ' data-luxtools-ajax-url="' . hsc($ajaxUrl) . '"'
+            . ' data-prev-month-id="' . hsc((string)$prevMonthId) . '"'
+            . ' data-next-month-id="' . hsc((string)$nextMonthId) . '"'
+            . '>';
+
+        $html .= '<div class="luxtools-calendar-nav">';
+        $html .= '<div class="luxtools-calendar-nav-prev">';
+        $html .= '<button type="button" class="luxtools-calendar-nav-button" data-luxtools-dir="-1" aria-label="Previous month">◀</button>';
+        $html .= '</div>';
+
+        $html .= '<div class="luxtools-calendar-title">';
+        $monthLabel = date('F', $firstDayTs);
+        if ($monthId !== null && function_exists('wl')) {
+            $html .= '<a class="luxtools-calendar-month-link" href="' . hsc((string)wl($monthId)) . '">' . hsc($monthLabel) . '</a>';
+        } else {
+            $html .= hsc($monthLabel);
+        }
+        $html .= ' ';
+        if ($yearId !== null && function_exists('wl')) {
+            $html .= '<a class="luxtools-calendar-year-link" href="' . hsc((string)wl($yearId)) . '">' . hsc((string)$year) . '</a>';
+        } else {
+            $html .= hsc((string)$year);
+        }
+        $html .= '</div>';
+
+        $html .= '<div class="luxtools-calendar-nav-next">';
+        $html .= '<button type="button" class="luxtools-calendar-nav-button" data-luxtools-dir="1" aria-label="Next month">▶</button>';
+        $html .= '</div>';
+        $html .= '</div>';
+
+        $html .= '<table class="luxtools-calendar-table">';
+        $html .= '<thead><tr>';
+        foreach (['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So'] as $weekday) {
+            $html .= '<th scope="col">' . hsc($weekday) . '</th>';
+        }
+        $html .= '</tr></thead><tbody>';
+
+        for ($cell = 0; $cell < $totalCells; $cell++) {
+            if ($cell % 7 === 0) $html .= '<tr>';
+
+            $dayNumber = $cell - $leadingEmpty + 1;
+            if ($dayNumber < 1 || $dayNumber > $daysInMonth) {
+                $html .= '<td class="luxtools-calendar-day luxtools-calendar-day-empty"></td>';
+            } else {
+                $date = sprintf('%04d-%02d-%02d', $year, $month, $dayNumber);
+                $dayId = ChronoID::dateToDayId($date, $baseNs);
+
+                $classes = 'luxtools-calendar-day';
+                if ($year === $todayY && $month === $todayM && $dayNumber === $todayD) {
+                    $classes .= ' luxtools-calendar-day-today';
+                }
+
+                $html .= '<td class="' . hsc($classes) . '">';
+                if ($dayId !== null && function_exists('html_wikilink')) {
+                    $html .= (string)html_wikilink($dayId, (string)$dayNumber);
+                } else {
+                    $html .= hsc((string)$dayNumber);
+                }
+                $html .= '</td>';
+            }
+
+            if ($cell % 7 === 6) $html .= '</tr>';
+        }
+
+        $html .= '</tbody></table></div>';
+        return $html;
+    }
+
+    /**
+     * @param int $year
+     * @param int $month
+     * @return bool
+     */
+    public static function isValidMonth(int $year, int $month): bool
+    {
+        if ($year < 1) return false;
+        if ($month < 1 || $month > 12) return false;
+        return true;
+    }
+}
--- a/src/ChronologicalDateAutoLinker.php
+++ b/src/ChronologicalDateAutoLinker.php
@@ -0,0 +1,134 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Auto-links strict ISO dates in rendered XHTML fragments.
+ */
+class ChronologicalDateAutoLinker
+{
+    /** @var string[] Tags where auto-linking must be disabled */
+    protected static $blockedTags = [
+        'a',
+        'code',
+        'pre',
+        'script',
+        'style',
+        'textarea',
+    ];
+
+    /**
+     * Link valid ISO dates in HTML text nodes while skipping blocked tags.
+     *
+     * @param string $html
+     * @return string
+     */
+    public static function linkHtml(string $html): string
+    {
+        $parts = preg_split('/(<[^>]+>)/u', $html, -1, PREG_SPLIT_DELIM_CAPTURE);
+        if (!is_array($parts)) return $html;
+
+        $blocked = [];
+        foreach (self::$blockedTags as $tag) {
+            $blocked[$tag] = 0;
+        }
+
+        $out = '';
+        foreach ($parts as $part) {
+            if ($part === '') {
+                $out .= $part;
+                continue;
+            }
+
+            if (str_starts_with($part, '<')) {
+                self::updateBlockedTagCounters($part, $blocked);
+                $out .= $part;
+                continue;
+            }
+
+            if (self::isBlockedContext($blocked)) {
+                $out .= $part;
+                continue;
+            }
+
+            $out .= self::linkText($part);
+        }
+
+        return $out;
+    }
+
+    /**
+     * Link strict ISO dates in plain text.
+     *
+     * @param string $text
+     * @return string
+     */
+    protected static function linkText(string $text): string
+    {
+        $replaced = preg_replace_callback(
+            '/(?<!\d)(\d{4}-\d{2}-\d{2})(?!\d)/',
+            static function (array $matches): string {
+                $date = (string)($matches[1] ?? '');
+                if ($date === '') return $matches[0];
+
+                $id = ChronoID::dateToDayId($date);
+                if ($id === null) return $matches[0];
+
+                if (function_exists('html_wikilink')) {
+                    return (string)html_wikilink($id, $date);
+                }
+
+                if (function_exists('wl')) {
+                    return '<a href="' . hsc((string)wl($id)) . '">' . hsc($date) . '</a>';
+                }
+
+                return $matches[0];
+            },
+            $text
+        );
+
+        return is_string($replaced) ? $replaced : $text;
+    }
+
+    /**
+     * Update blocked-tag counters while traversing HTML tokens.
+     *
+     * @param string $token
+     * @param array<string,int> $blocked
+     * @return void
+     */
+    protected static function updateBlockedTagCounters(string $token, array &$blocked): void
+    {
+        if (!preg_match('/^<\s*(\/?)\s*([a-zA-Z0-9:_-]+)/', $token, $matches)) {
+            return;
+        }
+
+        $isClosing = $matches[1] === '/';
+        $tag = strtolower((string)$matches[2]);
+        if (!array_key_exists($tag, $blocked)) return;
+
+        if ($isClosing) {
+            if ($blocked[$tag] > 0) $blocked[$tag]--;
+            return;
+        }
+
+        $selfClosing = preg_match('/\/\s*>$/', $token) === 1;
+        if (!$selfClosing) {
+            $blocked[$tag]++;
+        }
+    }
+
+    /**
+     * Check if traversal is currently inside a blocked context.
+     *
+     * @param array<string,int> $blocked
+     * @return bool
+     */
+    protected static function isBlockedContext(array $blocked): bool
+    {
+        foreach ($blocked as $count) {
+            if ($count > 0) return true;
+        }
+        return false;
+    }
+}
--- a/src/ChronologicalDayTemplate.php
+++ b/src/ChronologicalDayTemplate.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Builds page template content for chronological day pages.
+ */
+class ChronologicalDayTemplate
+{
+    /**
+     * Build a German date heading template for a canonical day ID.
+     *
+     * Example output:
+     * ====== Freitag, 13. Februar 2026 ======
+     *
+     * @param string $dayId
+     * @param string $baseNs
+     * @return string|null
+     */
+    public static function buildForDayId(string $dayId, string $baseNs = 'chronological'): ?string
+    {
+        $parts = ChronoID::parseDayId($dayId, $baseNs);
+        if ($parts === null) return null;
+
+        $formatted = self::formatGermanDate($parts['year'], $parts['month'], $parts['day']);
+        return '====== ' . $formatted . " ======\n\n";
+    }
+
+    /**
+     * Format date with German day/month names and style:
+     * Freitag, 13. Februar 2026
+     *
+     * @param int $year
+     * @param int $month
+     * @param int $day
+     * @return string
+     */
+    protected static function formatGermanDate(int $year, int $month, int $day): string
+    {
+        $weekdays = [
+            1 => 'Montag',
+            2 => 'Dienstag',
+            3 => 'Mittwoch',
+            4 => 'Donnerstag',
+            5 => 'Freitag',
+            6 => 'Samstag',
+            7 => 'Sonntag',
+        ];
+
+        $months = [
+            1 => 'Januar',
+            2 => 'Februar',
+            3 => 'März',
+            4 => 'April',
+            5 => 'Mai',
+            6 => 'Juni',
+            7 => 'Juli',
+            8 => 'August',
+            9 => 'September',
+            10 => 'Oktober',
+            11 => 'November',
+            12 => 'Dezember',
+        ];
+
+        $weekdayIndex = (int)date('N', mktime(0, 0, 0, $month, $day, $year));
+        $weekday = $weekdays[$weekdayIndex] ?? '';
+        $monthName = $months[$month] ?? '';
+
+        return sprintf('%s, %d. %s %d', $weekday, $day, $monthName, $year);
+    }
+}
--- a/src/ChronologicalIcsEvents.php
+++ b/src/ChronologicalIcsEvents.php
@@ -0,0 +1,283 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+use DateInterval;
+use DateTimeImmutable;
+use DateTimeInterface;
+use DateTimeZone;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject\Reader;
+use Throwable;
+
+/**
+ * Read local ICS files using sabre/vobject and expose events for one day.
+ */
+class ChronologicalIcsEvents
+{
+    /** @var array<string,array<int,array{summary:string,time:string,startIso:string,allDay:bool}>> In-request cache */
+    protected static $runtimeCache = [];
+
+    /**
+     * Return events for one day (YYYY-MM-DD) from configured local ICS files.
+     *
+     * @param string $icsConfig Multiline list of local ICS file paths
+     * @param string $dateIso
+    * @return array<int,array{summary:string,time:string,startIso:string,allDay:bool}>
+     */
+    public static function eventsForDate(string $icsConfig, string $dateIso): array
+    {
+        if (!ChronoID::isIsoDate($dateIso)) return [];
+
+        $files = self::parseConfiguredFiles($icsConfig);
+        if ($files === []) return [];
+
+        $signature = self::buildSignature($files);
+        if ($signature === '') return [];
+
+        $cacheKey = $signature . '|' . $dateIso;
+
+        if (isset(self::$runtimeCache[$cacheKey])) {
+            return self::$runtimeCache[$cacheKey];
+        }
+
+        $utc = new DateTimeZone('UTC');
+        $rangeStart = new DateTimeImmutable($dateIso . ' 00:00:00', $utc);
+        $rangeStart = $rangeStart->sub(new DateInterval('P1D'));
+        $rangeEnd = $rangeStart->add(new DateInterval('P3D'));
+
+        $events = [];
+        $seen = [];
+
+        foreach ($files as $file) {
+            foreach (self::readEventsFromFile($file, $dateIso, $rangeStart, $rangeEnd) as $entry) {
+                $dedupeKey = implode('|', [
+                    (string)($entry['summary'] ?? ''),
+                    (string)($entry['time'] ?? ''),
+                    ((bool)($entry['allDay'] ?? false)) ? '1' : '0',
+                ]);
+                if (isset($seen[$dedupeKey])) continue;
+                $seen[$dedupeKey] = true;
+                $events[] = $entry;
+            }
+        }
+
+        usort($events, static function (array $a, array $b): int {
+            $aAllDay = (bool)($a['allDay'] ?? false);
+            $bAllDay = (bool)($b['allDay'] ?? false);
+            if ($aAllDay !== $bAllDay) {
+                return $aAllDay ? -1 : 1;
+            }
+
+            $timeCmp = strcmp((string)($a['time'] ?? ''), (string)($b['time'] ?? ''));
+            if ($timeCmp !== 0) return $timeCmp;
+
+            return strcmp((string)($a['summary'] ?? ''), (string)($b['summary'] ?? ''));
+        });
+
+        self::$runtimeCache[$cacheKey] = $events;
+        return $events;
+    }
+
+    /**
+     * @param string $icsConfig
+     * @return string[]
+     */
+    protected static function parseConfiguredFiles(string $icsConfig): array
+    {
+        $files = [];
+        $lines = preg_split('/\r\n|\r|\n/', $icsConfig) ?: [];
+
+        foreach ($lines as $line) {
+            $line = trim((string)$line);
+            if ($line === '') continue;
+            if (str_starts_with($line, '#')) continue;
+
+            $path = Path::cleanPath($line, false);
+            if (!is_file($path) || !is_readable($path)) continue;
+            $files[] = $path;
+        }
+
+        $files = array_values(array_unique($files));
+        sort($files, SORT_NATURAL | SORT_FLAG_CASE);
+        return $files;
+    }
+
+    /**
+     * Build signature from file path + mtime + size.
+     *
+     * @param string[] $files
+     * @return string
+     */
+    protected static function buildSignature(array $files): string
+    {
+        if ($files === []) return '';
+        $parts = [];
+
+        foreach ($files as $file) {
+            $mtime = @filemtime($file) ?: 0;
+            $size = @filesize($file) ?: 0;
+            $parts[] = $file . '|' . $mtime . '|' . $size;
+        }
+
+        return sha1(implode("\n", $parts));
+    }
+
+    /**
+     * Parse one ICS file and return normalized events for the target day.
+     *
+     * @param string $file
+     * @param string $dateIso
+     * @param DateTimeImmutable $rangeStart
+     * @param DateTimeImmutable $rangeEnd
+    * @return array<int,array{summary:string,time:string,startIso:string,allDay:bool}>
+     */
+    protected static function readEventsFromFile(
+        string $file,
+        string $dateIso,
+        DateTimeImmutable $rangeStart,
+        DateTimeImmutable $rangeEnd
+    ): array
+    {
+        $raw = @file_get_contents($file);
+        if (!is_string($raw) || trim($raw) === '') return [];
+
+        try {
+            $component = Reader::read($raw, Reader::OPTION_FORGIVING);
+            if (!($component instanceof VCalendar)) return [];
+
+            $expanded = $component->expand($rangeStart, $rangeEnd);
+            if (!($expanded instanceof VCalendar)) return [];
+
+            return self::collectEventsFromCalendar($expanded, $dateIso);
+        } catch (Throwable $e) {
+            return [];
+        }
+    }
+
+    /**
+     * @param VCalendar $calendar
+     * @param string $dateIso
+    * @return array<int,array{summary:string,time:string,startIso:string,allDay:bool}>
+     */
+    protected static function collectEventsFromCalendar(
+        VCalendar $calendar,
+        string $dateIso
+    ): array {
+        $result = [];
+        $seen = [];
+
+        foreach ($calendar->select('VEVENT') as $vevent) {
+            if (!($vevent instanceof VEvent)) continue;
+
+            $normalized = self::normalizeEventForDay($vevent, $dateIso);
+            if ($normalized === null) continue;
+
+            $dedupeKey = implode('|', [
+                (string)($normalized['uid'] ?? ''),
+                (string)($normalized['rid'] ?? ''),
+                (string)($normalized['start'] ?? ''),
+                (string)($normalized['summary'] ?? ''),
+                (string)($normalized['time'] ?? ''),
+                ((bool)($normalized['allDay'] ?? false)) ? '1' : '0',
+            ]);
+            if (isset($seen[$dedupeKey])) continue;
+            $seen[$dedupeKey] = true;
+
+            $result[] = [
+                'summary' => (string)$normalized['summary'],
+                'time' => (string)$normalized['time'],
+                'startIso' => (string)$normalized['start'],
+                'allDay' => (bool)$normalized['allDay'],
+            ];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Convert VEVENT to output item when it intersects the target day.
+     *
+     * @param VEvent $vevent
+     * @param string $dateIso
+     * @return array<string,mixed>|null
+     */
+    protected static function normalizeEventForDay(
+        VEvent $vevent,
+        string $dateIso
+    ): ?array
+    {
+        if (!isset($vevent->DTSTART)) return null;
+        if (!ChronoID::isIsoDate($dateIso)) return null;
+
+        $isAllDay = strtoupper((string)($vevent->DTSTART['VALUE'] ?? '')) === 'DATE';
+
+        $start = self::toImmutableDateTime($vevent->DTSTART->getDateTime());
+        if ($start === null) return null;
+
+        $end = null;
+        if (isset($vevent->DTEND)) {
+            $end = self::toImmutableDateTime($vevent->DTEND->getDateTime());
+        } elseif (isset($vevent->DURATION)) {
+            try {
+                $duration = $vevent->DURATION->getDateInterval();
+                if ($duration instanceof DateInterval) {
+                    $end = $start->add($duration);
+                }
+            } catch (Throwable $e) {
+                $end = null;
+            }
+        }
+
+        if ($end === null) {
+            $end = $isAllDay ? $start->add(new DateInterval('P1D')) : $start;
+        }
+
+        if ($end <= $start) {
+            $end = $isAllDay ? $start->add(new DateInterval('P1D')) : $start;
+        }
+
+        $eventTimezone = $start->getTimezone();
+        $dayStart = new DateTimeImmutable($dateIso . ' 00:00:00', $eventTimezone);
+        $dayEnd = $dayStart->add(new DateInterval('P1D'));
+
+        $intersects = ($start < $dayEnd) && ($end > $dayStart);
+        if (!$intersects && !$isAllDay && $start >= $dayStart && $start < $dayEnd && $end == $start) {
+            $intersects = true;
+        }
+        if (!$intersects) return null;
+
+        $summary = trim((string)($vevent->SUMMARY ?? ''));
+        if ($summary === '') $summary = '(ohne Titel)';
+
+        $uid = trim((string)($vevent->UID ?? ''));
+        $rid = '';
+        if (isset($vevent->{'RECURRENCE-ID'})) {
+            $rid = trim((string)$vevent->{'RECURRENCE-ID'});
+        }
+
+        return [
+            'uid' => $uid,
+            'rid' => $rid,
+            'start' => $start->format(DateTimeInterface::ATOM),
+            'summary' => $summary,
+            'time' => $isAllDay ? '' : $start->format('H:i'),
+            'allDay' => $isAllDay,
+        ];
+    }
+
+    /**
+     * @param DateTimeInterface $dateTime
+     * @return DateTimeImmutable|null
+     */
+    protected static function toImmutableDateTime(DateTimeInterface $dateTime): ?DateTimeImmutable
+    {
+        if ($dateTime instanceof DateTimeImmutable) return $dateTime;
+
+        $immutable = DateTimeImmutable::createFromFormat('U', (string)$dateTime->getTimestamp());
+        if (!($immutable instanceof DateTimeImmutable)) return null;
+
+        return $immutable->setTimezone($dateTime->getTimezone());
+    }
+}
--- a/src/PageLink.php
+++ b/src/PageLink.php
@@ -0,0 +1,351 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+class PageLink
+{
+    public const META_KEY = 'pagelink';
+    public const CACHE_FILE = 'pagelink_cache.json';
+
+    /** @var string */
+    protected $pathConfig;
+
+    /** @var int */
+    protected $maxDepth;
+
+    /** @var array|null */
+    protected $cache = null;
+
+    /** @var bool */
+    protected $cacheDirty = false;
+
+    public function __construct(string $pathConfig, int $maxDepth)
+    {
+        $this->pathConfig = $pathConfig;
+        $this->maxDepth = max(0, $maxDepth);
+    }
+
+    /**
+     * Generate a v4 UUID (lowercase).
+     */
+    public static function createUuidV4(): string
+    {
+        $bytes = random_bytes(16);
+        $bytes[6] = chr((ord($bytes[6]) & 0x0f) | 0x40);
+        $bytes[8] = chr((ord($bytes[8]) & 0x3f) | 0x80);
+        $hex = bin2hex($bytes);
+        return sprintf(
+            '%s-%s-%s-%s-%s',
+            substr($hex, 0, 8),
+            substr($hex, 8, 4),
+            substr($hex, 12, 4),
+            substr($hex, 16, 4),
+            substr($hex, 20, 12)
+        );
+    }
+
+    /**
+     * Normalize and validate a UUID v4 string.
+     *
+     * @param string $uuid
+     * @return string|null
+     */
+    public static function normalizeUuid(string $uuid): ?string
+    {
+        $uuid = strtolower(trim($uuid));
+        if ($uuid === '') return null;
+
+        if (!preg_match('/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/', $uuid)) {
+            return null;
+        }
+        return $uuid;
+    }
+
+    /**
+     * Get the page's pagelink UUID from metadata (if valid).
+     */
+    public function getPageUuid(string $pageId): ?string
+    {
+        if ($pageId === '') return null;
+        if (!function_exists('p_get_metadata')) return null;
+
+        $value = p_get_metadata($pageId, self::META_KEY, METADATA_DONT_RENDER);
+        if (!is_string($value)) return null;
+        return self::normalizeUuid($value);
+    }
+
+    /**
+     * Persist a pagelink UUID in page metadata.
+     */
+    public function setPageUuid(string $pageId, string $uuid): bool
+    {
+        if ($pageId === '') return false;
+        if (!function_exists('p_set_metadata')) return false;
+        $uuid = self::normalizeUuid($uuid);
+        if ($uuid === null) return false;
+
+        return (bool)p_set_metadata($pageId, [self::META_KEY => $uuid]);
+    }
+
+    /**
+     * Remove the pagelink UUID from page metadata.
+     */
+    public function removePageUuid(string $pageId): bool
+    {
+        if ($pageId === '') return false;
+        if (!function_exists('p_set_metadata')) return false;
+
+        return (bool)p_set_metadata($pageId, [self::META_KEY => '']);
+    }
+
+    /**
+     * Unlink a page: remove UUID, delete linked .pagelink file if present, and clear cache.
+     *
+     * @param string $pageId
+     * @return array{ok: bool, uuid: string|null, folder: string|null}
+     */
+    public function unlinkPage(string $pageId): array
+    {
+        $uuid = $this->getPageUuid($pageId);
+        if ($uuid === null) {
+            return ['ok' => true, 'uuid' => null, 'folder' => null];
+        }
+
+        $linkInfo = $this->resolveUuid($uuid);
+        $folder = $linkInfo['folder'] ?? null;
+
+        if (is_string($folder) && $folder !== '') {
+            $file = rtrim($folder, '/\\') . '/.pagelink';
+            if (is_file($file) && !is_link($file)) {
+                @unlink($file);
+            }
+        }
+
+        $this->removeCacheEntry($uuid);
+        $this->removePageUuid($pageId);
+
+        return ['ok' => true, 'uuid' => $uuid, 'folder' => is_string($folder) ? $folder : null];
+    }
+
+    /**
+     * Resolve a pagelink UUID to a linked folder (if any).
+     *
+     * @param string $uuid
+     * @return array{folder: string|null, multiple: bool}
+     */
+    public function resolveUuid(string $uuid): array
+    {
+        $uuid = self::normalizeUuid($uuid);
+        if ($uuid === null) {
+            return ['folder' => null, 'multiple' => false];
+        }
+
+        $cache = $this->loadCache();
+        if (isset($cache[$uuid]) && is_string($cache[$uuid]) && $cache[$uuid] !== '') {
+            $cachedPath = $cache[$uuid];
+            if ($this->isValidLink($cachedPath, $uuid)) {
+                return ['folder' => $cachedPath, 'multiple' => false];
+            }
+
+            unset($cache[$uuid]);
+            $this->cacheDirty = true;
+        }
+
+        $matches = $this->scanRootsForUuid($uuid, 2);
+        if ($matches !== []) {
+            $cache[$uuid] = $matches[0];
+            $this->cacheDirty = true;
+        }
+
+        if ($this->cacheDirty) {
+            $this->writeCache($cache);
+        }
+
+        return [
+            'folder' => $matches[0] ?? null,
+            'multiple' => count($matches) > 1,
+        ];
+    }
+
+    /**
+     * Read the cache file into memory.
+     *
+     * @return array
+     */
+    protected function loadCache(): array
+    {
+        if ($this->cache !== null) return $this->cache;
+
+        $this->cache = [];
+        $file = $this->getCacheFile();
+        if (!is_file($file) || !is_readable($file)) return $this->cache;
+
+        $raw = @file_get_contents($file);
+        if (!is_string($raw) || $raw === '') return $this->cache;
+
+        $decoded = json_decode($raw, true);
+        if (!is_array($decoded)) return $this->cache;
+
+        $this->cache = $decoded;
+        return $this->cache;
+    }
+
+    /**
+     * Write cache to disk atomically.
+     */
+    protected function writeCache(array $cache): void
+    {
+        $file = $this->getCacheFile();
+        $dir = dirname($file);
+        if (function_exists('io_mkdir_p')) {
+            io_mkdir_p($dir);
+        } elseif (!@is_dir($dir)) {
+            @mkdir($dir, 0777, true);
+        }
+
+        $tmp = $file . '.tmp.' . getmypid();
+        $data = json_encode($cache, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
+        if ($data === false) return;
+
+        @file_put_contents($tmp, $data, LOCK_EX);
+        if (!@rename($tmp, $file)) {
+            @copy($tmp, $file);
+            @unlink($tmp);
+        }
+
+        $this->cache = $cache;
+        $this->cacheDirty = false;
+    }
+
+    /**
+     * Remove a specific UUID from cache.
+     */
+    public function removeCacheEntry(string $uuid): void
+    {
+        $uuid = self::normalizeUuid($uuid);
+        if ($uuid === null) return;
+
+        $cache = $this->loadCache();
+        if (!isset($cache[$uuid])) return;
+
+        unset($cache[$uuid]);
+        $this->writeCache($cache);
+    }
+
+    /**
+     * Get cache file path for pagelink mappings.
+     */
+    protected function getCacheFile(): string
+    {
+        global $conf;
+        $cacheDir = rtrim((string)$conf['cachedir'], '/');
+        return $cacheDir . '/luxtools/' . self::CACHE_FILE;
+    }
+
+    /**
+     * Check if the cached path still points to a valid .pagelink file.
+     */
+    protected function isValidLink(string $folder, string $uuid): bool
+    {
+        if ($folder === '') return false;
+        if (!is_dir($folder)) return false;
+        if (is_link($folder)) return false;
+
+        $file = rtrim($folder, '/\\') . '/.pagelink';
+        if (!is_file($file) || is_link($file) || !is_readable($file)) return false;
+
+        $content = @file_get_contents($file);
+        if (!is_string($content)) return false;
+
+        $content = self::normalizeUuid($content);
+        return $content !== null && $content === $uuid;
+    }
+
+    /**
+     * Scan configured roots for matching .pagelink files.
+     *
+     * @param string $uuid
+     * @param int $limit Maximum number of matches to collect.
+     * @return string[]
+     */
+    protected function scanRootsForUuid(string $uuid, int $limit = 2): array
+    {
+        $roots = $this->getConfiguredRoots();
+        if ($roots === []) return [];
+
+        $matches = [];
+        foreach ($roots as $root) {
+            $this->scanDirectory($root, 0, $uuid, $limit, $matches);
+            if (count($matches) >= $limit) break;
+        }
+        return $matches;
+    }
+
+    /**
+     * Recursively scan a directory for .pagelink files.
+     *
+     * @param string $dir
+     * @param int $depth
+     * @param string $uuid
+     * @param int $limit
+     * @param array $matches
+     */
+    protected function scanDirectory(string $dir, int $depth, string $uuid, int $limit, array &$matches): void
+    {
+        if ($dir === '' || count($matches) >= $limit) return;
+        if (!is_dir($dir) || is_link($dir)) return;
+        if (!is_readable($dir)) return;
+        if ($depth > $this->maxDepth) return;
+
+        $file = rtrim($dir, '/\\') . '/.pagelink';
+        if (is_file($file) && !is_link($file) && is_readable($file)) {
+            $content = @file_get_contents($file);
+            if (is_string($content)) {
+                $content = self::normalizeUuid($content);
+                if ($content !== null && $content === $uuid) {
+                    $matches[] = rtrim($dir, '/\\');
+                    if (count($matches) >= $limit) return;
+                }
+            }
+        }
+
+        if ($depth >= $this->maxDepth) return;
+
+        $handle = @opendir($dir);
+        if ($handle === false) return;
+
+        $base = rtrim($dir, '/\\');
+        while (($entry = readdir($handle)) !== false) {
+            if ($entry === '.' || $entry === '..') continue;
+            if ($entry === '.pagelink') continue;
+
+            $path = $base . '/' . $entry;
+            if (!is_dir($path) || is_link($path)) continue;
+
+            $this->scanDirectory($path, $depth + 1, $uuid, $limit, $matches);
+            if (count($matches) >= $limit) break;
+        }
+
+        closedir($handle);
+    }
+
+    /**
+     * Resolve configured root paths (excluding aliases).
+     *
+     * @return string[]
+     */
+    protected function getConfiguredRoots(): array
+    {
+        $pathConfig = trim($this->pathConfig);
+        if ($pathConfig === '') return [];
+
+        $helper = new Path($pathConfig);
+        $paths = $helper->getPaths();
+        $roots = [];
+        foreach ($paths as $key => $info) {
+            if (!isset($info['root']) || $key !== $info['root']) continue;
+            $roots[] = $info['root'];
+        }
+        return $roots;
+    }
+}
--- a/src/PageLinkTrait.php
+++ b/src/PageLinkTrait.php
@@ -0,0 +1,159 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Trait for pagelink-related functionality shared across syntax handlers.
+ *
+ * Provides methods for:
+ * - Detecting blobs alias paths
+ * - Resolving the blobs root folder from page metadata
+ * - Rendering "page not linked" messages
+ * - Building path configs with blobs alias support
+ *
+ * Requirements for using classes:
+ * - Must have getConf() method (from SyntaxPlugin)
+ * - Must have getLang() method (from SyntaxPlugin)
+ */
+trait PageLinkTrait
+{
+    /**
+     * Check if the given path uses the blobs alias.
+     *
+     * @param string $path
+     * @return bool
+     */
+    protected function isBlobsPath(string $path): bool
+    {
+        $trimmed = ltrim($path, '/');
+        return preg_match('/^blobs(\/|$)/', $trimmed) === 1;
+    }
+
+    /**
+     * Render the "Page not linked" message with copy ID affordance.
+     *
+     * @param \Doku_Renderer $renderer
+     */
+    protected function renderPageNotLinked(\Doku_Renderer $renderer): void
+    {
+        $text = (string)$this->getLang('pagelink_unlinked');
+
+        if ($renderer instanceof \Doku_Renderer_xhtml) {
+            $renderer->doc .= '<span class="luxtools-pagelink-status">' . hsc($text) . '</span>';
+            return;
+        }
+
+        $renderer->cdata('[n/a: ' . $text . ']');
+    }
+
+    /**
+     * Read the current page UUID (if any).
+     *
+     * @return string The UUID or empty string
+     */
+    protected function getPageUuidSafe(): string
+    {
+        global $ID;
+        $pageId = is_string($ID) ? $ID : '';
+        if ($pageId === '') return '';
+
+        if (function_exists('cleanID')) {
+            $pageId = (string)cleanID($pageId);
+        }
+        if ($pageId === '') return '';
+
+        $depth = (int)$this->getConf('pagelink_search_depth');
+        if ($depth < 0) $depth = 0;
+
+        $pageLink = new PageLink((string)$this->getConf('paths'), $depth);
+        $uuid = $pageLink->getPageUuid($pageId);
+        return $uuid ?? '';
+    }
+
+    /**
+     * Resolve the current page's pagelink folder for the blobs alias.
+     *
+     * Results are cached per page ID within a single request.
+     *
+     * @return string The linked folder path or empty string if not linked
+     */
+    protected function resolveBlobsRoot(): string
+    {
+        static $cached = [];
+
+        global $ID;
+        $pageId = is_string($ID) ? $ID : '';
+        if ($pageId === '') return '';
+
+        if (function_exists('cleanID')) {
+            $pageId = (string)cleanID($pageId);
+        }
+        if ($pageId === '') return '';
+
+        if (isset($cached[$pageId])) {
+            return (string)$cached[$pageId];
+        }
+
+        $depth = (int)$this->getConf('pagelink_search_depth');
+        if ($depth < 0) $depth = 0;
+
+        $pageLink = new PageLink((string)$this->getConf('paths'), $depth);
+        $uuid = $pageLink->getPageUuid($pageId);
+        if ($uuid === null) {
+            $cached[$pageId] = '';
+            return '';
+        }
+
+        $linkInfo = $pageLink->resolveUuid($uuid);
+        $folder = $linkInfo['folder'] ?? '';
+        if (!is_string($folder) || $folder === '') {
+            $cached[$pageId] = '';
+            return '';
+        }
+
+        $cached[$pageId] = $folder;
+        return $folder;
+    }
+
+    /**
+     * Build a path config string with the blobs alias appended (if available).
+     *
+     * @param string|null $blobsRoot The blobs root folder (or null to auto-resolve)
+     * @return string The path config string
+     */
+    protected function buildPathConfigWithBlobs(?string $blobsRoot = null): string
+    {
+        $pathConfig = (string)$this->getConf('paths');
+
+        if ($blobsRoot === null) {
+            $blobsRoot = $this->resolveBlobsRoot();
+        }
+
+        if ($blobsRoot !== '') {
+            $pathConfig = rtrim($pathConfig) . "\n" . $blobsRoot . "\nA> blobs";
+        }
+
+        return $pathConfig;
+    }
+
+    /**
+     * Create a Path helper with blobs alias support.
+     *
+     * @param string|null $blobsRoot The blobs root folder (or null to auto-resolve)
+     * @return Path
+     */
+    protected function createPathHelperWithBlobs(?string $blobsRoot = null): Path
+    {
+        return new Path($this->buildPathConfigWithBlobs($blobsRoot));
+    }
+
+    /**
+     * Create a Path helper using only the base paths config (no blobs alias).
+     *
+     * @return Path
+     */
+    protected function createPathHelper(): Path
+    {
+        return new Path((string)$this->getConf('paths'));
+    }
+}
--- a/src/Path.php
+++ b/src/Path.php
@@ -99,10 +99,10 @@ class Path
    }

    /**
-     * Map a real filesystem path back to a configured alias, if available.
+     * Map a real filesystem path back to an open-service alias, if available.
     *
     * Example: root "/share/Datascape/" with alias "/Scape/" maps
-     * "/share/Datascape/some/folder" -> "/Scape/some/folder".
+     * "/share/Datascape/some/folder" -> "Scape>some/folder".
     *
     * If no alias matches, the input path is returned unchanged (except for
     * normalization of slashes and dot-segments).
@@ -117,12 +117,17 @@ class Path
        // normalize input for matching, but do not force a trailing slash
        $normalized = static::cleanPath($path, false);

-        // collect root->alias mappings (avoid alias keys that reference the same config)
+        // collect root->alias mappings for open-service links
+        // (avoid alias keys that reference the same config)
        $mappings = [];
        foreach ($this->paths as $key => $info) {
            if (!isset($info['root']) || $key !== $info['root']) continue;
            if (empty($info['alias'])) continue;
-            $mappings[$info['root']] = $info['alias'];
+
+            $alias = $this->normalizeOpenAlias((string)$info['alias']);
+            if ($alias === '') continue;
+
+            $mappings[$info['root']] = $alias;
        }

        if ($mappings === []) return $normalized;
@@ -131,16 +136,34 @@ class Path
        uksort($mappings, static fn($a, $b) => strlen($b) - strlen($a));

        foreach ($mappings as $root => $alias) {
+            $rootNoTrailingSlash = rtrim($root, '/');
+            if (!str_starts_with($normalized, $root) && $normalized !== $rootNoTrailingSlash) continue;
+
+            $suffix = '';
            if (str_starts_with($normalized, $root)) {
-                $suffix = substr($normalized, strlen($root));
-                $alias = static::cleanPath($alias, true);
-                return rtrim($alias, '/') . '/' . $suffix;
+                $suffix = (string)substr($normalized, strlen($root));
            }
+            $suffix = ltrim($suffix, '/');
+
+            return $alias . '>' . $suffix;
        }

        return $normalized;
    }

+    /**
+     * Convert legacy path-like aliases (e.g. /Scape/) to open aliases (Scape).
+     *
+     * @param string $alias
+     * @return string
+     */
+    protected function normalizeOpenAlias($alias)
+    {
+        $alias = trim($alias);
+        $alias = trim($alias, '/\\');
+        return $alias;
+    }
+
    /**
     * Clean a path for better comparison
     *
--- a/style.css
+++ b/style.css
@@ -49,6 +49,19 @@ div.luxtools-plugin .luxtools-empty {
    padding: 0.25em 0;
 }

+/* Page link status (unlinked blobs alias) */
+span.luxtools-pagelink-status {
+    display: inline-block;
+    font-size: 0.85em;
+    line-height: 1.3;
+    margin: 0.25em 0;
+    padding: 0.15em 0.4em;
+    border: 1px solid @ini_border;
+    border-radius: 0.2em;
+    background-color: @ini_background_alt;
+    color: inherit;
+}
+
 /* Image gallery spacing. */
 div.luxtools-gallery {
    padding-bottom: 0.5em;
@@ -409,6 +422,31 @@ html.luxtools-noscroll body {
    }
 }

+/* ========================================================================
+ * Grouping wrapper (compact image layout container)
+ * ======================================================================== */
+
+.luxtools-grouping {
+    display: grid;
+    grid-template-columns: repeat(var(--luxtools-grouping-cols, 2), minmax(0, 1fr));
+    gap: var(--luxtools-grouping-gap, 0);
+    justify-content: var(--luxtools-grouping-justify, start);
+    align-items: var(--luxtools-grouping-align, start);
+}
+
+.luxtools-grouping.luxtools-grouping--flex {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--luxtools-grouping-gap, 0);
+}
+
+/* Let the grouping layout fully control item placement. */
+.luxtools-grouping .luxtools-imagebox {
+    float: none;
+    clear: none;
+    margin: 0;
+}
+
 /* ========================================================================
 * Imagebox (Wikipedia-style image with caption)
 * ======================================================================== */
@@ -470,3 +508,114 @@ html.luxtools-noscroll body {
    padding: 3px;
    text-align: left;
 }
+
+/* ========================================================================
+ * Calendar widget
+ * ======================================================================== */
+
+div.luxtools-calendar {
+    width: 100%;
+    max-width: 100%;
+    font-size: 88%;
+}
+
+div.luxtools-calendar .luxtools-calendar-title {
+    font-weight: bold;
+    margin-bottom: 0.25em;
+    font-size: 95%;
+    text-align: center;
+}
+
+div.luxtools-calendar .luxtools-calendar-nav {
+    display: grid;
+    grid-template-columns: 1fr auto 1fr;
+    align-items: center;
+    margin-bottom: 0.25em;
+}
+
+div.luxtools-calendar .luxtools-calendar-nav-prev {
+    text-align: left;
+}
+
+div.luxtools-calendar .luxtools-calendar-nav-next {
+    text-align: right;
+}
+
+div.luxtools-calendar .luxtools-calendar-nav-prev a,
+div.luxtools-calendar .luxtools-calendar-nav-next a {
+    text-decoration: none;
+}
+
+div.luxtools-calendar .luxtools-calendar-nav-button {
+    border: 1px solid @ini_border;
+    background-color: @ini_background_alt;
+    color: @ini_text;
+    font: inherit;
+    line-height: 1;
+    padding: 0.2em 0.45em;
+    cursor: pointer;
+}
+
+div.luxtools-calendar .luxtools-calendar-nav-button:hover,
+div.luxtools-calendar .luxtools-calendar-nav-button:focus {
+    background-color: @ini_highlight;
+    outline: none;
+}
+
+div.luxtools-calendar table.luxtools-calendar-table {
+    width: 100%;
+    border-collapse: collapse;
+    table-layout: fixed;
+}
+
+div.luxtools-calendar table.luxtools-calendar-table th,
+div.luxtools-calendar table.luxtools-calendar-table td {
+    border: 1px solid @ini_border;
+    padding: 0;
+    text-align: center;
+    vertical-align: middle;
+}
+
+div.luxtools-calendar table.luxtools-calendar-table th {
+    background-color: @ini_background_alt;
+    font-size: 85%;
+    font-weight: normal;
+}
+
+div.luxtools-calendar td.luxtools-calendar-day-empty {
+    background-color: @ini_background_alt;
+}
+
+div.luxtools-calendar td.luxtools-calendar-day-today {
+    background-color: @ini_highlight;
+}
+
+div.luxtools-calendar td.luxtools-calendar-day a {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 100%;
+    min-height: 1.9em;
+    background: transparent;
+    text-decoration: none;
+    border-bottom: 0;
+    box-shadow: none;
+    padding: 0.1em 0;
+}
+
+div.luxtools-calendar td.luxtools-calendar-day a:hover,
+div.luxtools-calendar td.luxtools-calendar-day a:focus,
+div.luxtools-calendar td.luxtools-calendar-day a:active,
+div.luxtools-calendar td.luxtools-calendar-day a:visited {
+    text-decoration: none;
+    border-bottom: 0;
+    box-shadow: none;
+}
+
+div.luxtools-calendar td.luxtools-calendar-day:hover {
+    background-color: @ini_background_alt;
+}
+
+div.luxtools-calendar td.luxtools-calendar-day.luxtools-calendar-day-today:hover {
+    background-color: @ini_highlight;
+}
--- a/syntax/AbstractSyntax.php
+++ b/syntax/AbstractSyntax.php
@@ -4,6 +4,7 @@ use dokuwiki\Extension\SyntaxPlugin;
 use dokuwiki\plugin\luxtools\Crawler;
 use dokuwiki\plugin\luxtools\Output;
 use dokuwiki\plugin\luxtools\Path;
+use dokuwiki\plugin\luxtools\PageLinkTrait;

 require_once(__DIR__ . '/../autoload.php');

@@ -15,6 +16,7 @@ require_once(__DIR__ . '/../autoload.php');
 if (!class_exists('syntax_plugin_luxtools_abstract', false)) {
 abstract class syntax_plugin_luxtools_abstract extends SyntaxPlugin
 {
+    use PageLinkTrait;
    /**
     * Returns the syntax keyword (e.g., 'files', 'directory', 'images').
     * Used for pattern matching and plugin registration.
@@ -208,7 +210,12 @@ abstract class syntax_plugin_luxtools_abstract extends SyntaxPlugin
    protected function getPathInfoSafe(string $basePath, \Doku_Renderer $renderer)
    {
        try {
-            $pathHelper = new Path($this->getConf('paths'));
+            $blobsRoot = $this->resolveBlobsRoot();
+            if ($blobsRoot === '' && $this->isBlobsPath($basePath)) {
+                $this->renderPageNotLinked($renderer);
+                return false;
+            }
+            $pathHelper = $this->createPathHelperWithBlobs($blobsRoot);
            return $pathHelper->getPathInfo($basePath);
        } catch (\Exception $e) {
            $this->renderError($renderer, 'error_outsidejail');
--- a/syntax/calendar.php
+++ b/syntax/calendar.php
@@ -0,0 +1,147 @@
+<?php
+
+use dokuwiki\Extension\SyntaxPlugin;
+use dokuwiki\plugin\luxtools\ChronologicalCalendarWidget;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * luxtools Plugin: Calendar widget syntax.
+ *
+ * Syntax:
+ * - {{calendar>}}            current month
+ * - {{calendar>YYYY-MM}}     specific month
+ * - {{calendar>YYYY-MM&base=chronological}} custom base namespace (optional)
+ */
+class syntax_plugin_luxtools_calendar extends SyntaxPlugin
+{
+    /** @inheritdoc */
+    public function getType()
+    {
+        return 'substition';
+    }
+
+    /** @inheritdoc */
+    public function getPType()
+    {
+        return 'block';
+    }
+
+    /** @inheritdoc */
+    public function getSort()
+    {
+        return 224;
+    }
+
+    /** @inheritdoc */
+    public function connectTo($mode)
+    {
+        $this->Lexer->addSpecialPattern('\{\{calendar>.*?\}\}', $mode, 'plugin_luxtools_calendar');
+    }
+
+    /** @inheritdoc */
+    public function handle($match, $state, $pos, Doku_Handler $handler)
+    {
+        $match = substr($match, strlen('{{calendar>'), -2);
+        [$target, $flags] = array_pad(explode('&', $match, 2), 2, '');
+
+        $target = trim((string)$target);
+        $params = $this->parseFlags($flags);
+        $baseNs = $params['base'] ?? 'chronological';
+
+        $resolved = $this->resolveTargetMonth($target);
+        if ($resolved === null) {
+            return [
+                'ok' => false,
+                'error' => 'calendar_err_badmonth',
+            ];
+        }
+
+        return [
+            'ok' => true,
+            'year' => $resolved['year'],
+            'month' => $resolved['month'],
+            'base' => $baseNs,
+        ];
+    }
+
+    /** @inheritdoc */
+    public function render($format, Doku_Renderer $renderer, $data)
+    {
+        if ($data === false || !is_array($data)) return false;
+        if ($format !== 'xhtml') return false;
+        if (!($renderer instanceof Doku_Renderer_xhtml)) return false;
+
+        if (!($data['ok'] ?? false)) {
+            $message = (string)$this->getLang((string)($data['error'] ?? 'calendar_err_badmonth'));
+            if ($message === '') $message = 'Invalid calendar month. Use YYYY-MM.';
+            $renderer->doc .= '<div class="luxtools-plugin luxtools-calendar"><div class="luxtools-empty">' . hsc($message) . '</div></div>';
+            return true;
+        }
+
+        $year = (int)$data['year'];
+        $month = (int)$data['month'];
+        $baseNs = (string)$data['base'];
+
+        $renderer->doc .= ChronologicalCalendarWidget::render($year, $month, $baseNs);
+
+        return true;
+    }
+
+    /**
+     * @param string $flags
+     * @return array<string,string>
+     */
+    protected function parseFlags(string $flags): array
+    {
+        $params = [];
+        foreach (explode('&', $flags) as $flag) {
+            if (trim($flag) === '') continue;
+            [$name, $value] = array_pad(explode('=', $flag, 2), 2, '');
+            $name = strtolower(trim($name));
+            $value = trim($value);
+            if ($name === '') continue;
+            $params[$name] = $value;
+        }
+
+        if (!isset($params['base']) || trim($params['base']) === '') {
+            $params['base'] = 'chronological';
+        }
+
+        return $params;
+    }
+
+    /**
+     * Resolve target string to year/month.
+     *
+     * Accepted formats:
+     * - '' (current month)
+     * - YYYY-MM
+     *
+     * @param string $target
+     * @return array{year:int,month:int}|null
+     */
+    protected function resolveTargetMonth(string $target): ?array
+    {
+        if ($target === '') {
+            return [
+                'year' => (int)date('Y'),
+                'month' => (int)date('m'),
+            ];
+        }
+
+        if (!preg_match('/^(\d{4})-(\d{2})$/', $target, $matches)) {
+            return null;
+        }
+
+        $year = (int)$matches[1];
+        $month = (int)$matches[2];
+        if ($year < 1) return null;
+        if ($month < 1 || $month > 12) return null;
+
+        return [
+            'year' => $year,
+            'month' => $month,
+        ];
+    }
+}
--- a/syntax/grouping.php
+++ b/syntax/grouping.php
@@ -0,0 +1,282 @@
+<?php
+
+use dokuwiki\Extension\SyntaxPlugin;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * luxtools Plugin: Grouping wrapper syntax.
+ *
+ * Wraps multiple blocks (typically {{image>...}}) and applies compact layout
+ * without adding visual box styling of its own.
+ *
+ * Syntax:
+ * <grouping layout="flex" gap="0" justify="start" align="start">
+ *   {{image>...}}
+ *   {{image>...}}
+ * </grouping>
+ */
+class syntax_plugin_luxtools_grouping extends SyntaxPlugin
+{
+    /** @inheritdoc */
+    public function getType()
+    {
+        return 'container';
+    }
+
+    /** @inheritdoc */
+    public function getPType()
+    {
+        return 'block';
+    }
+
+    /** @inheritdoc */
+    public function getSort()
+    {
+        // Slightly after image syntax
+        return 316;
+    }
+
+    /** @inheritdoc */
+    public function getAllowedTypes()
+    {
+        return ['container', 'substition', 'protected', 'disabled', 'formatting'];
+    }
+
+    /** @inheritdoc */
+    public function connectTo($mode)
+    {
+        $this->Lexer->addEntryPattern('<grouping(?:\s+[^>]*)?>(?=.*</grouping>)', $mode, 'plugin_luxtools_grouping');
+    }
+
+    /** @inheritdoc */
+    public function postConnect()
+    {
+        $this->Lexer->addExitPattern('</grouping>', 'plugin_luxtools_grouping');
+    }
+
+    /** @inheritdoc */
+    public function handle($match, $state, $pos, Doku_Handler $handler)
+    {
+        if ($state === DOKU_LEXER_ENTER) {
+            $parsed = $this->parseOpeningTag($match);
+            return [
+                'state' => $state,
+                'params' => $parsed['params'],
+                'unknown' => $parsed['unknown'],
+            ];
+        }
+
+        if ($state === DOKU_LEXER_UNMATCHED) {
+            return [
+                'state' => $state,
+                'text' => $match,
+            ];
+        }
+
+        return [
+            'state' => $state,
+        ];
+    }
+
+    /** @inheritdoc */
+    public function render($format, Doku_Renderer $renderer, $data)
+    {
+        if (!is_array($data) || !isset($data['state'])) {
+            return false;
+        }
+
+        $state = (int)$data['state'];
+
+        if ($format !== 'xhtml') {
+            if ($state === DOKU_LEXER_UNMATCHED && isset($data['text'])) {
+                $renderer->cdata((string)$data['text']);
+            }
+            return true;
+        }
+
+        if (!($renderer instanceof Doku_Renderer_xhtml)) {
+            return true;
+        }
+
+        if ($state === DOKU_LEXER_ENTER) {
+            $params = isset($data['params']) && is_array($data['params']) ? $data['params'] : $this->getDefaultParams();
+            $unknown = isset($data['unknown']) && is_array($data['unknown']) ? $data['unknown'] : [];
+
+            $layout = ($params['layout'] === 'flex') ? 'flex' : 'grid';
+            $cols = (int)$params['cols'];
+            if ($cols < 1) {
+                $cols = 2;
+            }
+
+            $gap = (string)$params['gap'];
+            if (!$this->isValidCssLength($gap)) {
+                $gap = '0';
+            }
+
+            $justify = (string)$params['justify'];
+            if (!$this->isValidJustify($justify)) {
+                $justify = 'start';
+            }
+
+            $align = (string)$params['align'];
+            if (!$this->isValidAlign($align)) {
+                $align = 'start';
+            }
+
+            $renderer->doc .= '<div class="luxtools-grouping luxtools-grouping--' . hsc($layout) . '"'
+                . ' style="--luxtools-grouping-cols: ' . $cols
+                . '; --luxtools-grouping-gap: ' . hsc($gap)
+                . '; --luxtools-grouping-justify: ' . hsc($justify)
+                . '; --luxtools-grouping-align: ' . hsc($align)
+                . ';">';
+
+            if ($unknown !== []) {
+                $renderer->doc .= '<span class="luxtools-grouping-warning">'
+                    . hsc('[grouping: unknown option(s): ' . implode(', ', $unknown) . ']')
+                    . '</span>';
+            }
+            return true;
+        }
+
+        if ($state === DOKU_LEXER_UNMATCHED) {
+            if (isset($data['text'])) {
+                $renderer->cdata((string)$data['text']);
+            }
+            return true;
+        }
+
+        if ($state === DOKU_LEXER_EXIT) {
+            $renderer->doc .= '</div>';
+            return true;
+        }
+
+        return true;
+    }
+
+    /**
+     * Parse opening <grouping ...> tag attributes.
+     *
+     * Supports attribute style only, e.g.
+     * layout="grid" cols="3" gap="8px" justify="center" align="stretch".
+     * Unknown or invalid values are ignored and defaults are used.
+     *
+     * @param string $match
+     * @return array{params:array{layout:string,cols:int,gap:string,justify:string,align:string},unknown:array<int,string>}
+     */
+    protected function parseOpeningTag(string $match): array
+    {
+        $params = $this->getDefaultParams();
+        $unknown = [];
+
+        if (!preg_match('/^<grouping\b(.*?)>$/is', $match, $tagMatch)) {
+            return ['params' => $params, 'unknown' => $unknown];
+        }
+
+        $attrPart = (string)$tagMatch[1];
+        if ($attrPart === '') {
+            return ['params' => $params, 'unknown' => $unknown];
+        }
+
+        if (preg_match_all('/([a-zA-Z_:][a-zA-Z0-9:._-]*)\s*=\s*(["\'])(.*?)\2/s', $attrPart, $attrMatches, PREG_SET_ORDER)) {
+            foreach ($attrMatches as $item) {
+                $name = strtolower(trim((string)$item[1]));
+                $value = trim((string)$item[3]);
+
+                if ($name === 'layout') {
+                    $value = strtolower($value);
+                    if (in_array($value, ['grid', 'flex'], true)) {
+                        $params['layout'] = $value;
+                    }
+                    continue;
+                }
+
+                if ($name === 'cols') {
+                    if (preg_match('/^\d+$/', $value)) {
+                        $cols = (int)$value;
+                        if ($cols > 0) {
+                            $params['cols'] = min($cols, 12);
+                        }
+                    }
+                    continue;
+                }
+
+                if ($name === 'gap') {
+                    if ($this->isValidCssLength($value)) {
+                        $params['gap'] = $value;
+                    }
+                    continue;
+                }
+
+                if ($name === 'justify') {
+                    $value = strtolower($value);
+                    if ($this->isValidJustify($value)) {
+                        $params['justify'] = $value;
+                    }
+                    continue;
+                }
+
+                if ($name === 'align') {
+                    $value = strtolower($value);
+                    if ($this->isValidAlign($value)) {
+                        $params['align'] = $value;
+                    }
+                    continue;
+                }
+
+                $unknown[] = $name;
+            }
+        }
+
+        if ($unknown !== []) {
+            $unknown = array_values(array_unique($unknown));
+        }
+
+        return ['params' => $params, 'unknown' => $unknown];
+    }
+
+    /**
+     * @return array{layout:string,cols:int,gap:string,justify:string,align:string}
+     */
+    protected function getDefaultParams(): array
+    {
+        return [
+            'layout' => 'flex',
+            'cols' => 2,
+            'gap' => '0',
+            'justify' => 'start',
+            'align' => 'start',
+        ];
+    }
+
+    /**
+     * Validate a simple CSS length token.
+     *
+     * Allows "0" and common explicit units used in docs/examples.
+     */
+    protected function isValidCssLength(string $value): bool
+    {
+        $value = trim($value);
+        if ($value === '0') {
+            return true;
+        }
+
+        return (bool)preg_match('/^(?:\d+(?:\.\d+)?|\.\d+)(?:px|em|rem|%|vw|vh)$/', $value);
+    }
+
+    /**
+     * Validate justify-content compatible values.
+     */
+    protected function isValidJustify(string $value): bool
+    {
+        return in_array($value, ['start', 'center', 'end', 'space-between', 'space-around', 'space-evenly'], true);
+    }
+
+    /**
+     * Validate align-items compatible values.
+     */
+    protected function isValidAlign(string $value): bool
+    {
+        return in_array($value, ['start', 'center', 'end', 'stretch', 'baseline'], true);
+    }
+}
--- a/syntax/image.php
+++ b/syntax/image.php
@@ -2,6 +2,7 @@

 use dokuwiki\Extension\SyntaxPlugin;
 use dokuwiki\plugin\luxtools\Path;
+use dokuwiki\plugin\luxtools\PageLinkTrait;
 use dokuwiki\plugin\luxtools\ThumbnailHelper;

 require_once(__DIR__ . '/../autoload.php');
@@ -15,6 +16,7 @@ require_once(__DIR__ . '/../autoload.php');
 */
 class syntax_plugin_luxtools_image extends SyntaxPlugin
 {
+    use PageLinkTrait;
    /** @inheritdoc */
    public function getType()
    {
@@ -132,7 +134,13 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
        }

        try {
-            $pathHelper = new Path($this->getConf('paths'));
+            $blobsRoot = $this->resolveBlobsRoot();
+            if ($blobsRoot === '' && $this->isBlobsPath($data['path'] ?? '')) {
+                $this->renderPageNotLinked($renderer);
+                return true;
+            }
+
+            $pathHelper = $this->createPathHelperWithBlobs($blobsRoot);
            // Use addTrailingSlash=false since this is a file path, not a directory
            $pathInfo = $pathHelper->getPathInfo($data['path'], false);
        } catch (\Exception $e) {
@@ -244,8 +252,9 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
            $outerStyle = ' style="width: ' . ($width + 10) . 'px;"';
        }

-        // Use thumbnail metadata from helper
-        $dataThumbAttr = $thumb['isFinal'] ? '' : ' data-thumb-src="' . hsc($thumb['thumbUrl']) . '"';
+        // Use thumbnail metadata from helper.
+        // JS loader expects data-src (same convention as gallery thumbnails).
+        $dataThumbAttr = $thumb['isFinal'] ? '' : ' data-src="' . hsc($thumb['thumbUrl']) . '"';

        // Build image attributes
        $imgAttrs = 'class="media luxtools-thumb" loading="lazy" decoding="async"';
@@ -264,7 +273,7 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
        // Image with link to full size
        $renderer->doc .= '<a href="' . hsc($fullUrl) . '" class="media" target="_blank">';
        $renderer->doc .= '<img src="' . hsc($thumb['url']) . '" ' . $imgAttrs . $dataThumbAttr . ' />';
-        $renderer->doc .= '</a>';;
+        $renderer->doc .= '</a>';

        // Caption
        if ($caption !== '') {
--- a/syntax/open.php
+++ b/syntax/open.php
@@ -1,6 +1,10 @@
 <?php

 use dokuwiki\Extension\SyntaxPlugin;
+use dokuwiki\plugin\luxtools\PageLinkTrait;
+use dokuwiki\plugin\luxtools\Path;
+
+require_once(__DIR__ . '/../autoload.php');

 /**
 * luxtools Plugin: Open local path syntax.
@@ -10,6 +14,7 @@ use dokuwiki\Extension\SyntaxPlugin;
 */
 class syntax_plugin_luxtools_open extends SyntaxPlugin
 {
+    use PageLinkTrait;
    /** @inheritdoc */
    public function getType()
    {
@@ -73,6 +78,53 @@ class syntax_plugin_luxtools_open extends SyntaxPlugin
            return true;
        }

+        // Resolve blobs alias to the linked folder (if available)
+        if ($this->isBlobsPath($path)) {
+            $blobsRoot = $this->resolveBlobsRoot();
+            if ($blobsRoot === '') {
+                $this->renderPageNotLinked($renderer);
+                return true;
+            }
+
+            try {
+                $pathHelper = $this->createPathHelperWithBlobs($blobsRoot);
+                $resolvedPath = $path;
+                $isBlobsRoot = (rtrim($resolvedPath, '/') === 'blobs');
+                if ($isBlobsRoot) {
+                    $resolvedPath = rtrim($resolvedPath, '/') . '/';
+                }
+                $pathInfo = $pathHelper->getPathInfo($resolvedPath, $isBlobsRoot);
+                $path = $pathInfo['path'];
+            } catch (\Exception $e) {
+                $renderer->cdata('[n/a: ' . $this->getLang('error_outsidejail') . ']');
+                return true;
+            }
+        }
+
+        // Map local paths back to their configured aliases before opening.
+        if (!preg_match('/^[a-zA-Z][a-zA-Z0-9+.-]*:/', $path)) {
+            try {
+                $pathHelper = $this->createPathHelper();
+
+                // If the input itself uses a configured path alias (legacy syntax
+                // like "alias/sub/path"), resolve it first so the emitted open
+                // path uses the new client-side alias format "ALIAS>relative".
+                $resolvedPath = $path;
+                try {
+                    $pathInfo = $pathHelper->getPathInfo($path, false);
+                    if (isset($pathInfo['path']) && is_string($pathInfo['path']) && $pathInfo['path'] !== '') {
+                        $resolvedPath = $pathInfo['path'];
+                    }
+                } catch (\Exception $e) {
+                    // keep original path as-is when it is not in configured roots
+                }
+
+                $path = $pathHelper->mapToAliasPath($resolvedPath);
+            } catch (\Exception $e) {
+                // ignore mapping failures
+            }
+        }
+
        $serviceUrl = trim((string)$this->getConf('open_service_url'));
        $serviceToken = trim((string)$this->getConf('open_service_token'));

--- a/vendor/autoload.php
+++ b/vendor/autoload.php
@@ -0,0 +1,22 @@
+<?php
+
+// autoload.php @generated by Composer
+
+if (PHP_VERSION_ID < 50600) {
+    if (!headers_sent()) {
+        header('HTTP/1.1 500 Internal Server Error');
+    }
+    $err = 'Composer 2.3.0 dropped support for autoloading on PHP <5.6 and you are running '.PHP_VERSION.', please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.'.PHP_EOL;
+    if (!ini_get('display_errors')) {
+        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
+            fwrite(STDERR, $err);
+        } elseif (!headers_sent()) {
+            echo $err;
+        }
+    }
+    throw new RuntimeException($err);
+}
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInit440454aa6bd2975652e94f60998e9adc::getLoader();
--- a/vendor/bin/generate_vcards
+++ b/vendor/bin/generate_vcards
@@ -0,0 +1,119 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * Proxy PHP file generated by Composer
+ *
+ * This file includes the referenced bin path (../sabre/vobject/bin/generate_vcards)
+ * using a stream wrapper to prevent the shebang from being output on PHP<8
+ *
+ * @generated
+ */
+
+namespace Composer;
+
+$GLOBALS['_composer_bin_dir'] = __DIR__;
+$GLOBALS['_composer_autoload_path'] = __DIR__ . '/..'.'/autoload.php';
+
+if (PHP_VERSION_ID < 80000) {
+    if (!class_exists('Composer\BinProxyWrapper')) {
+        /**
+         * @internal
+         */
+        final class BinProxyWrapper
+        {
+            private $handle;
+            private $position;
+            private $realpath;
+
+            public function stream_open($path, $mode, $options, &$opened_path)
+            {
+                // get rid of phpvfscomposer:// prefix for __FILE__ & __DIR__ resolution
+                $opened_path = substr($path, 17);
+                $this->realpath = realpath($opened_path) ?: $opened_path;
+                $opened_path = $this->realpath;
+                $this->handle = fopen($this->realpath, $mode);
+                $this->position = 0;
+
+                return (bool) $this->handle;
+            }
+
+            public function stream_read($count)
+            {
+                $data = fread($this->handle, $count);
+
+                if ($this->position === 0) {
+                    $data = preg_replace('{^#!.*\r?\n}', '', $data);
+                }
+
+                $this->position += strlen($data);
+
+                return $data;
+            }
+
+            public function stream_cast($castAs)
+            {
+                return $this->handle;
+            }
+
+            public function stream_close()
+            {
+                fclose($this->handle);
+            }
+
+            public function stream_lock($operation)
+            {
+                return $operation ? flock($this->handle, $operation) : true;
+            }
+
+            public function stream_seek($offset, $whence)
+            {
+                if (0 === fseek($this->handle, $offset, $whence)) {
+                    $this->position = ftell($this->handle);
+                    return true;
+                }
+
+                return false;
+            }
+
+            public function stream_tell()
+            {
+                return $this->position;
+            }
+
+            public function stream_eof()
+            {
+                return feof($this->handle);
+            }
+
+            public function stream_stat()
+            {
+                return array();
+            }
+
+            public function stream_set_option($option, $arg1, $arg2)
+            {
+                return true;
+            }
+
+            public function url_stat($path, $flags)
+            {
+                $path = substr($path, 17);
+                if (file_exists($path)) {
+                    return stat($path);
+                }
+
+                return false;
+            }
+        }
+    }
+
+    if (
+        (function_exists('stream_get_wrappers') && in_array('phpvfscomposer', stream_get_wrappers(), true))
+        || (function_exists('stream_wrapper_register') && stream_wrapper_register('phpvfscomposer', 'Composer\BinProxyWrapper'))
+    ) {
+        return include("phpvfscomposer://" . __DIR__ . '/..'.'/sabre/vobject/bin/generate_vcards');
+    }
+}
+
+return include __DIR__ . '/..'.'/sabre/vobject/bin/generate_vcards';
--- a/vendor/bin/vobject
+++ b/vendor/bin/vobject
@@ -0,0 +1,119 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * Proxy PHP file generated by Composer
+ *
+ * This file includes the referenced bin path (../sabre/vobject/bin/vobject)
+ * using a stream wrapper to prevent the shebang from being output on PHP<8
+ *
+ * @generated
+ */
+
+namespace Composer;
+
+$GLOBALS['_composer_bin_dir'] = __DIR__;
+$GLOBALS['_composer_autoload_path'] = __DIR__ . '/..'.'/autoload.php';
+
+if (PHP_VERSION_ID < 80000) {
+    if (!class_exists('Composer\BinProxyWrapper')) {
+        /**
+         * @internal
+         */
+        final class BinProxyWrapper
+        {
+            private $handle;
+            private $position;
+            private $realpath;
+
+            public function stream_open($path, $mode, $options, &$opened_path)
+            {
+                // get rid of phpvfscomposer:// prefix for __FILE__ & __DIR__ resolution
+                $opened_path = substr($path, 17);
+                $this->realpath = realpath($opened_path) ?: $opened_path;
+                $opened_path = $this->realpath;
+                $this->handle = fopen($this->realpath, $mode);
+                $this->position = 0;
+
+                return (bool) $this->handle;
+            }
+
+            public function stream_read($count)
+            {
+                $data = fread($this->handle, $count);
+
+                if ($this->position === 0) {
+                    $data = preg_replace('{^#!.*\r?\n}', '', $data);
+                }
+
+                $this->position += strlen($data);
+
+                return $data;
+            }
+
+            public function stream_cast($castAs)
+            {
+                return $this->handle;
+            }
+
+            public function stream_close()
+            {
+                fclose($this->handle);
+            }
+
+            public function stream_lock($operation)
+            {
+                return $operation ? flock($this->handle, $operation) : true;
+            }
+
+            public function stream_seek($offset, $whence)
+            {
+                if (0 === fseek($this->handle, $offset, $whence)) {
+                    $this->position = ftell($this->handle);
+                    return true;
+                }
+
+                return false;
+            }
+
+            public function stream_tell()
+            {
+                return $this->position;
+            }
+
+            public function stream_eof()
+            {
+                return feof($this->handle);
+            }
+
+            public function stream_stat()
+            {
+                return array();
+            }
+
+            public function stream_set_option($option, $arg1, $arg2)
+            {
+                return true;
+            }
+
+            public function url_stat($path, $flags)
+            {
+                $path = substr($path, 17);
+                if (file_exists($path)) {
+                    return stat($path);
+                }
+
+                return false;
+            }
+        }
+    }
+
+    if (
+        (function_exists('stream_get_wrappers') && in_array('phpvfscomposer', stream_get_wrappers(), true))
+        || (function_exists('stream_wrapper_register') && stream_wrapper_register('phpvfscomposer', 'Composer\BinProxyWrapper'))
+    ) {
+        return include("phpvfscomposer://" . __DIR__ . '/..'.'/sabre/vobject/bin/vobject');
+    }
+}
+
+return include __DIR__ . '/..'.'/sabre/vobject/bin/vobject';
--- a/vendor/composer/ClassLoader.php
+++ b/vendor/composer/ClassLoader.php
@@ -0,0 +1,579 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Autoload;
+
+/**
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
+ *
+ *     $loader = new \Composer\Autoload\ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     // activate the autoloader
+ *     $loader->register();
+ *
+ *     // to enable searching the include path (eg. for PEAR packages)
+ *     $loader->setUseIncludePath(true);
+ *
+ * In this example, if you try to use a class in the Symfony\Component
+ * namespace or one of its children (Symfony\Component\Console for instance),
+ * the autoloader will first look for the class under the component/
+ * directory, and it will then fallback to the framework/ directory if not
+ * found before giving up.
+ *
+ * This class is loosely based on the Symfony UniversalClassLoader.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    https://www.php-fig.org/psr/psr-0/
+ * @see    https://www.php-fig.org/psr/psr-4/
+ */
+class ClassLoader
+{
+    /** @var \Closure(string):void */
+    private static $includeFile;
+
+    /** @var string|null */
+    private $vendorDir;
+
+    // PSR-4
+    /**
+     * @var array<string, array<string, int>>
+     */
+    private $prefixLengthsPsr4 = array();
+    /**
+     * @var array<string, list<string>>
+     */
+    private $prefixDirsPsr4 = array();
+    /**
+     * @var list<string>
+     */
+    private $fallbackDirsPsr4 = array();
+
+    // PSR-0
+    /**
+     * List of PSR-0 prefixes
+     *
+     * Structured as array('F (first letter)' => array('Foo\Bar (full prefix)' => array('path', 'path2')))
+     *
+     * @var array<string, array<string, list<string>>>
+     */
+    private $prefixesPsr0 = array();
+    /**
+     * @var list<string>
+     */
+    private $fallbackDirsPsr0 = array();
+
+    /** @var bool */
+    private $useIncludePath = false;
+
+    /**
+     * @var array<string, string>
+     */
+    private $classMap = array();
+
+    /** @var bool */
+    private $classMapAuthoritative = false;
+
+    /**
+     * @var array<string, bool>
+     */
+    private $missingClasses = array();
+
+    /** @var string|null */
+    private $apcuPrefix;
+
+    /**
+     * @var array<string, self>
+     */
+    private static $registeredLoaders = array();
+
+    /**
+     * @param string|null $vendorDir
+     */
+    public function __construct($vendorDir = null)
+    {
+        $this->vendorDir = $vendorDir;
+        self::initializeIncludeClosure();
+    }
+
+    /**
+     * @return array<string, list<string>>
+     */
+    public function getPrefixes()
+    {
+        if (!empty($this->prefixesPsr0)) {
+            return call_user_func_array('array_merge', array_values($this->prefixesPsr0));
+        }
+
+        return array();
+    }
+
+    /**
+     * @return array<string, list<string>>
+     */
+    public function getPrefixesPsr4()
+    {
+        return $this->prefixDirsPsr4;
+    }
+
+    /**
+     * @return list<string>
+     */
+    public function getFallbackDirs()
+    {
+        return $this->fallbackDirsPsr0;
+    }
+
+    /**
+     * @return list<string>
+     */
+    public function getFallbackDirsPsr4()
+    {
+        return $this->fallbackDirsPsr4;
+    }
+
+    /**
+     * @return array<string, string> Array of classname => path
+     */
+    public function getClassMap()
+    {
+        return $this->classMap;
+    }
+
+    /**
+     * @param array<string, string> $classMap Class to filename map
+     *
+     * @return void
+     */
+    public function addClassMap(array $classMap)
+    {
+        if ($this->classMap) {
+            $this->classMap = array_merge($this->classMap, $classMap);
+        } else {
+            $this->classMap = $classMap;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix, either
+     * appending or prepending to the ones previously set for this prefix.
+     *
+     * @param string              $prefix  The prefix
+     * @param list<string>|string $paths   The PSR-0 root directories
+     * @param bool                $prepend Whether to prepend the directories
+     *
+     * @return void
+     */
+    public function add($prefix, $paths, $prepend = false)
+    {
+        $paths = (array) $paths;
+        if (!$prefix) {
+            if ($prepend) {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $paths,
+                    $this->fallbackDirsPsr0
+                );
+            } else {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $this->fallbackDirsPsr0,
+                    $paths
+                );
+            }
+
+            return;
+        }
+
+        $first = $prefix[0];
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
+            $this->prefixesPsr0[$first][$prefix] = $paths;
+
+            return;
+        }
+        if ($prepend) {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $paths,
+                $this->prefixesPsr0[$first][$prefix]
+            );
+        } else {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $this->prefixesPsr0[$first][$prefix],
+                $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace, either
+     * appending or prepending to the ones previously set for this namespace.
+     *
+     * @param string              $prefix  The prefix/namespace, with trailing '\\'
+     * @param list<string>|string $paths   The PSR-4 base directories
+     * @param bool                $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function addPsr4($prefix, $paths, $prepend = false)
+    {
+        $paths = (array) $paths;
+        if (!$prefix) {
+            // Register directories for the root namespace.
+            if ($prepend) {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $paths,
+                    $this->fallbackDirsPsr4
+                );
+            } else {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $this->fallbackDirsPsr4,
+                    $paths
+                );
+            }
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
+            // Register directories for a new namespace.
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = $paths;
+        } elseif ($prepend) {
+            // Prepend directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $paths,
+                $this->prefixDirsPsr4[$prefix]
+            );
+        } else {
+            // Append directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $this->prefixDirsPsr4[$prefix],
+                $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix,
+     * replacing any others previously set for this prefix.
+     *
+     * @param string              $prefix The prefix
+     * @param list<string>|string $paths  The PSR-0 base directories
+     *
+     * @return void
+     */
+    public function set($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr0 = (array) $paths;
+        } else {
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace,
+     * replacing any others previously set for this namespace.
+     *
+     * @param string              $prefix The prefix/namespace, with trailing '\\'
+     * @param list<string>|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function setPsr4($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr4 = (array) $paths;
+        } else {
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Turns on searching the include path for class files.
+     *
+     * @param bool $useIncludePath
+     *
+     * @return void
+     */
+    public function setUseIncludePath($useIncludePath)
+    {
+        $this->useIncludePath = $useIncludePath;
+    }
+
+    /**
+     * Can be used to check if the autoloader uses the include path to check
+     * for classes.
+     *
+     * @return bool
+     */
+    public function getUseIncludePath()
+    {
+        return $this->useIncludePath;
+    }
+
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     *
+     * @return void
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
+    /**
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
+     *
+     * @param string|null $apcuPrefix
+     *
+     * @return void
+     */
+    public function setApcuPrefix($apcuPrefix)
+    {
+        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
+    }
+
+    /**
+     * The APCu prefix in use, or null if APCu caching is not enabled.
+     *
+     * @return string|null
+     */
+    public function getApcuPrefix()
+    {
+        return $this->apcuPrefix;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     *
+     * @return void
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+
+        if (null === $this->vendorDir) {
+            return;
+        }
+
+        if ($prepend) {
+            self::$registeredLoaders = array($this->vendorDir => $this) + self::$registeredLoaders;
+        } else {
+            unset(self::$registeredLoaders[$this->vendorDir]);
+            self::$registeredLoaders[$this->vendorDir] = $this;
+        }
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     *
+     * @return void
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+
+        if (null !== $this->vendorDir) {
+            unset(self::$registeredLoaders[$this->vendorDir]);
+        }
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param  string    $class The name of the class
+     * @return true|null True if loaded, null otherwise
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            $includeFile = self::$includeFile;
+            $includeFile($file);
+
+            return true;
+        }
+
+        return null;
+    }
+
+    /**
+     * Finds the path to the file where the class is defined.
+     *
+     * @param string $class The name of the class
+     *
+     * @return string|false The path if found, false otherwise
+     */
+    public function findFile($class)
+    {
+        // class map lookup
+        if (isset($this->classMap[$class])) {
+            return $this->classMap[$class];
+        }
+        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
+            return false;
+        }
+        if (null !== $this->apcuPrefix) {
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
+            if ($hit) {
+                return $file;
+            }
+        }
+
+        $file = $this->findFileWithExtension($class, '.php');
+
+        // Search for Hack files if we are running on HHVM
+        if (false === $file && defined('HHVM_VERSION')) {
+            $file = $this->findFileWithExtension($class, '.hh');
+        }
+
+        if (null !== $this->apcuPrefix) {
+            apcu_add($this->apcuPrefix.$class, $file);
+        }
+
+        if (false === $file) {
+            // Remember that this class does not exist.
+            $this->missingClasses[$class] = true;
+        }
+
+        return $file;
+    }
+
+    /**
+     * Returns the currently registered loaders keyed by their corresponding vendor directories.
+     *
+     * @return array<string, self>
+     */
+    public static function getRegisteredLoaders()
+    {
+        return self::$registeredLoaders;
+    }
+
+    /**
+     * @param  string       $class
+     * @param  string       $ext
+     * @return string|false
+     */
+    private function findFileWithExtension($class, $ext)
+    {
+        // PSR-4 lookup
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
+
+        $first = $class[0];
+        if (isset($this->prefixLengthsPsr4[$first])) {
+            $subPath = $class;
+            while (false !== $lastPos = strrpos($subPath, '\\')) {
+                $subPath = substr($subPath, 0, $lastPos);
+                $search = $subPath . '\\';
+                if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
+                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
+                        if (file_exists($file = $dir . $pathEnd)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-4 fallback dirs
+        foreach ($this->fallbackDirsPsr4 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 lookup
+        if (false !== $pos = strrpos($class, '\\')) {
+            // namespaced class name
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
+        } else {
+            // PEAR-like class name
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
+        }
+
+        if (isset($this->prefixesPsr0[$first])) {
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($dirs as $dir) {
+                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-0 fallback dirs
+        foreach ($this->fallbackDirsPsr0 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 include paths.
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
+            return $file;
+        }
+
+        return false;
+    }
+
+    /**
+     * @return void
+     */
+    private static function initializeIncludeClosure()
+    {
+        if (self::$includeFile !== null) {
+            return;
+        }
+
+        /**
+         * Scope isolated include.
+         *
+         * Prevents access to $this/self from included files.
+         *
+         * @param  string $file
+         * @return void
+         */
+        self::$includeFile = \Closure::bind(static function($file) {
+            include $file;
+        }, null, null);
+    }
+}
--- a/vendor/composer/InstalledVersions.php
+++ b/vendor/composer/InstalledVersions.php
@@ -0,0 +1,396 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer;
+
+use Composer\Autoload\ClassLoader;
+use Composer\Semver\VersionParser;
+
+/**
+ * This class is copied in every Composer installed project and available to all
+ *
+ * See also https://getcomposer.org/doc/07-runtime.md#installed-versions
+ *
+ * To require its presence, you can require `composer-runtime-api ^2.0`
+ *
+ * @final
+ */
+class InstalledVersions
+{
+    /**
+     * @var string|null if set (by reflection by Composer), this should be set to the path where this class is being copied to
+     * @internal
+     */
+    private static $selfDir = null;
+
+    /**
+     * @var mixed[]|null
+     * @psalm-var array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}|array{}|null
+     */
+    private static $installed;
+
+    /**
+     * @var bool
+     */
+    private static $installedIsLocalDir;
+
+    /**
+     * @var bool|null
+     */
+    private static $canGetVendors;
+
+    /**
+     * @var array[]
+     * @psalm-var array<string, array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}>
+     */
+    private static $installedByVendor = array();
+
+    /**
+     * Returns a list of all package names which are present, either by being installed, replaced or provided
+     *
+     * @return string[]
+     * @psalm-return list<string>
+     */
+    public static function getInstalledPackages()
+    {
+        $packages = array();
+        foreach (self::getInstalled() as $installed) {
+            $packages[] = array_keys($installed['versions']);
+        }
+
+        if (1 === \count($packages)) {
+            return $packages[0];
+        }
+
+        return array_keys(array_flip(\call_user_func_array('array_merge', $packages)));
+    }
+
+    /**
+     * Returns a list of all package names with a specific type e.g. 'library'
+     *
+     * @param  string   $type
+     * @return string[]
+     * @psalm-return list<string>
+     */
+    public static function getInstalledPackagesByType($type)
+    {
+        $packagesByType = array();
+
+        foreach (self::getInstalled() as $installed) {
+            foreach ($installed['versions'] as $name => $package) {
+                if (isset($package['type']) && $package['type'] === $type) {
+                    $packagesByType[] = $name;
+                }
+            }
+        }
+
+        return $packagesByType;
+    }
+
+    /**
+     * Checks whether the given package is installed
+     *
+     * This also returns true if the package name is provided or replaced by another package
+     *
+     * @param  string $packageName
+     * @param  bool   $includeDevRequirements
+     * @return bool
+     */
+    public static function isInstalled($packageName, $includeDevRequirements = true)
+    {
+        foreach (self::getInstalled() as $installed) {
+            if (isset($installed['versions'][$packageName])) {
+                return $includeDevRequirements || !isset($installed['versions'][$packageName]['dev_requirement']) || $installed['versions'][$packageName]['dev_requirement'] === false;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Checks whether the given package satisfies a version constraint
+     *
+     * e.g. If you want to know whether version 2.3+ of package foo/bar is installed, you would call:
+     *
+     *   Composer\InstalledVersions::satisfies(new VersionParser, 'foo/bar', '^2.3')
+     *
+     * @param  VersionParser $parser      Install composer/semver to have access to this class and functionality
+     * @param  string        $packageName
+     * @param  string|null   $constraint  A version constraint to check for, if you pass one you have to make sure composer/semver is required by your package
+     * @return bool
+     */
+    public static function satisfies(VersionParser $parser, $packageName, $constraint)
+    {
+        $constraint = $parser->parseConstraints((string) $constraint);
+        $provided = $parser->parseConstraints(self::getVersionRanges($packageName));
+
+        return $provided->matches($constraint);
+    }
+
+    /**
+     * Returns a version constraint representing all the range(s) which are installed for a given package
+     *
+     * It is easier to use this via isInstalled() with the $constraint argument if you need to check
+     * whether a given version of a package is installed, and not just whether it exists
+     *
+     * @param  string $packageName
+     * @return string Version constraint usable with composer/semver
+     */
+    public static function getVersionRanges($packageName)
+    {
+        foreach (self::getInstalled() as $installed) {
+            if (!isset($installed['versions'][$packageName])) {
+                continue;
+            }
+
+            $ranges = array();
+            if (isset($installed['versions'][$packageName]['pretty_version'])) {
+                $ranges[] = $installed['versions'][$packageName]['pretty_version'];
+            }
+            if (array_key_exists('aliases', $installed['versions'][$packageName])) {
+                $ranges = array_merge($ranges, $installed['versions'][$packageName]['aliases']);
+            }
+            if (array_key_exists('replaced', $installed['versions'][$packageName])) {
+                $ranges = array_merge($ranges, $installed['versions'][$packageName]['replaced']);
+            }
+            if (array_key_exists('provided', $installed['versions'][$packageName])) {
+                $ranges = array_merge($ranges, $installed['versions'][$packageName]['provided']);
+            }
+
+            return implode(' || ', $ranges);
+        }
+
+        throw new \OutOfBoundsException('Package "' . $packageName . '" is not installed');
+    }
+
+    /**
+     * @param  string      $packageName
+     * @return string|null If the package is being replaced or provided but is not really installed, null will be returned as version, use satisfies or getVersionRanges if you need to know if a given version is present
+     */
+    public static function getVersion($packageName)
+    {
+        foreach (self::getInstalled() as $installed) {
+            if (!isset($installed['versions'][$packageName])) {
+                continue;
+            }
+
+            if (!isset($installed['versions'][$packageName]['version'])) {
+                return null;
+            }
+
+            return $installed['versions'][$packageName]['version'];
+        }
+
+        throw new \OutOfBoundsException('Package "' . $packageName . '" is not installed');
+    }
+
+    /**
+     * @param  string      $packageName
+     * @return string|null If the package is being replaced or provided but is not really installed, null will be returned as version, use satisfies or getVersionRanges if you need to know if a given version is present
+     */
+    public static function getPrettyVersion($packageName)
+    {
+        foreach (self::getInstalled() as $installed) {
+            if (!isset($installed['versions'][$packageName])) {
+                continue;
+            }
+
+            if (!isset($installed['versions'][$packageName]['pretty_version'])) {
+                return null;
+            }
+
+            return $installed['versions'][$packageName]['pretty_version'];
+        }
+
+        throw new \OutOfBoundsException('Package "' . $packageName . '" is not installed');
+    }
+
+    /**
+     * @param  string      $packageName
+     * @return string|null If the package is being replaced or provided but is not really installed, null will be returned as reference
+     */
+    public static function getReference($packageName)
+    {
+        foreach (self::getInstalled() as $installed) {
+            if (!isset($installed['versions'][$packageName])) {
+                continue;
+            }
+
+            if (!isset($installed['versions'][$packageName]['reference'])) {
+                return null;
+            }
+
+            return $installed['versions'][$packageName]['reference'];
+        }
+
+        throw new \OutOfBoundsException('Package "' . $packageName . '" is not installed');
+    }
+
+    /**
+     * @param  string      $packageName
+     * @return string|null If the package is being replaced or provided but is not really installed, null will be returned as install path. Packages of type metapackages also have a null install path.
+     */
+    public static function getInstallPath($packageName)
+    {
+        foreach (self::getInstalled() as $installed) {
+            if (!isset($installed['versions'][$packageName])) {
+                continue;
+            }
+
+            return isset($installed['versions'][$packageName]['install_path']) ? $installed['versions'][$packageName]['install_path'] : null;
+        }
+
+        throw new \OutOfBoundsException('Package "' . $packageName . '" is not installed');
+    }
+
+    /**
+     * @return array
+     * @psalm-return array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}
+     */
+    public static function getRootPackage()
+    {
+        $installed = self::getInstalled();
+
+        return $installed[0]['root'];
+    }
+
+    /**
+     * Returns the raw installed.php data for custom implementations
+     *
+     * @deprecated Use getAllRawData() instead which returns all datasets for all autoloaders present in the process. getRawData only returns the first dataset loaded, which may not be what you expect.
+     * @return array[]
+     * @psalm-return array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}
+     */
+    public static function getRawData()
+    {
+        @trigger_error('getRawData only returns the first dataset loaded, which may not be what you expect. Use getAllRawData() instead which returns all datasets for all autoloaders present in the process.', E_USER_DEPRECATED);
+
+        if (null === self::$installed) {
+            // only require the installed.php file if this file is loaded from its dumped location,
+            // and not from its source location in the composer/composer package, see https://github.com/composer/composer/issues/9937
+            if (substr(__DIR__, -8, 1) !== 'C') {
+                self::$installed = include __DIR__ . '/installed.php';
+            } else {
+                self::$installed = array();
+            }
+        }
+
+        return self::$installed;
+    }
+
+    /**
+     * Returns the raw data of all installed.php which are currently loaded for custom implementations
+     *
+     * @return array[]
+     * @psalm-return list<array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}>
+     */
+    public static function getAllRawData()
+    {
+        return self::getInstalled();
+    }
+
+    /**
+     * Lets you reload the static array from another file
+     *
+     * This is only useful for complex integrations in which a project needs to use
+     * this class but then also needs to execute another project's autoloader in process,
+     * and wants to ensure both projects have access to their version of installed.php.
+     *
+     * A typical case would be PHPUnit, where it would need to make sure it reads all
+     * the data it needs from this class, then call reload() with
+     * `require $CWD/vendor/composer/installed.php` (or similar) as input to make sure
+     * the project in which it runs can then also use this class safely, without
+     * interference between PHPUnit's dependencies and the project's dependencies.
+     *
+     * @param  array[] $data A vendor/composer/installed.php data set
+     * @return void
+     *
+     * @psalm-param array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>} $data
+     */
+    public static function reload($data)
+    {
+        self::$installed = $data;
+        self::$installedByVendor = array();
+
+        // when using reload, we disable the duplicate protection to ensure that self::$installed data is
+        // always returned, but we cannot know whether it comes from the installed.php in __DIR__ or not,
+        // so we have to assume it does not, and that may result in duplicate data being returned when listing
+        // all installed packages for example
+        self::$installedIsLocalDir = false;
+    }
+
+    /**
+     * @return string
+     */
+    private static function getSelfDir()
+    {
+        if (self::$selfDir === null) {
+            self::$selfDir = strtr(__DIR__, '\\', '/');
+        }
+
+        return self::$selfDir;
+    }
+
+    /**
+     * @return array[]
+     * @psalm-return list<array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}>
+     */
+    private static function getInstalled()
+    {
+        if (null === self::$canGetVendors) {
+            self::$canGetVendors = method_exists('Composer\Autoload\ClassLoader', 'getRegisteredLoaders');
+        }
+
+        $installed = array();
+        $copiedLocalDir = false;
+
+        if (self::$canGetVendors) {
+            $selfDir = self::getSelfDir();
+            foreach (ClassLoader::getRegisteredLoaders() as $vendorDir => $loader) {
+                $vendorDir = strtr($vendorDir, '\\', '/');
+                if (isset(self::$installedByVendor[$vendorDir])) {
+                    $installed[] = self::$installedByVendor[$vendorDir];
+                } elseif (is_file($vendorDir.'/composer/installed.php')) {
+                    /** @var array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>} $required */
+                    $required = require $vendorDir.'/composer/installed.php';
+                    self::$installedByVendor[$vendorDir] = $required;
+                    $installed[] = $required;
+                    if (self::$installed === null && $vendorDir.'/composer' === $selfDir) {
+                        self::$installed = $required;
+                        self::$installedIsLocalDir = true;
+                    }
+                }
+                if (self::$installedIsLocalDir && $vendorDir.'/composer' === $selfDir) {
+                    $copiedLocalDir = true;
+                }
+            }
+        }
+
+        if (null === self::$installed) {
+            // only require the installed.php file if this file is loaded from its dumped location,
+            // and not from its source location in the composer/composer package, see https://github.com/composer/composer/issues/9937
+            if (substr(__DIR__, -8, 1) !== 'C') {
+                /** @var array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>} $required */
+                $required = require __DIR__ . '/installed.php';
+                self::$installed = $required;
+            } else {
+                self::$installed = array();
+            }
+        }
+
+        if (self::$installed !== array() && !$copiedLocalDir) {
+            $installed[] = self::$installed;
+        }
+
+        return $installed;
+    }
+}
--- a/vendor/composer/LICENSE
+++ b/vendor/composer/LICENSE
@@ -0,0 +1,21 @@
+
+Copyright (c) Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
--- a/vendor/composer/autoload_classmap.php
+++ b/vendor/composer/autoload_classmap.php
@@ -0,0 +1,10 @@
+<?php
+
+// autoload_classmap.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Composer\\InstalledVersions' => $vendorDir . '/composer/InstalledVersions.php',
+);
--- a/vendor/composer/autoload_files.php
+++ b/vendor/composer/autoload_files.php
@@ -0,0 +1,12 @@
+<?php
+
+// autoload_files.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    '383eaff206634a77a1be54e64e6459c7' => $vendorDir . '/sabre/uri/lib/functions.php',
+    '3569eecfeed3bcf0bad3c998a494ecb8' => $vendorDir . '/sabre/xml/lib/Deserializer/functions.php',
+    '93aa591bc4ca510c520999e34229ee79' => $vendorDir . '/sabre/xml/lib/Serializer/functions.php',
+);
--- a/vendor/composer/autoload_namespaces.php
+++ b/vendor/composer/autoload_namespaces.php
@@ -0,0 +1,9 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+);
--- a/vendor/composer/autoload_psr4.php
+++ b/vendor/composer/autoload_psr4.php
@@ -0,0 +1,12 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Sabre\\Xml\\' => array($vendorDir . '/sabre/xml/lib'),
+    'Sabre\\VObject\\' => array($vendorDir . '/sabre/vobject/lib'),
+    'Sabre\\Uri\\' => array($vendorDir . '/sabre/uri/lib'),
+);
--- a/vendor/composer/autoload_real.php
+++ b/vendor/composer/autoload_real.php
@@ -0,0 +1,50 @@
+<?php
+
+// autoload_real.php @generated by Composer
+
+class ComposerAutoloaderInit440454aa6bd2975652e94f60998e9adc
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/ClassLoader.php';
+        }
+    }
+
+    /**
+     * @return \Composer\Autoload\ClassLoader
+     */
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        require __DIR__ . '/platform_check.php';
+
+        spl_autoload_register(array('ComposerAutoloaderInit440454aa6bd2975652e94f60998e9adc', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader(\dirname(__DIR__));
+        spl_autoload_unregister(array('ComposerAutoloaderInit440454aa6bd2975652e94f60998e9adc', 'loadClassLoader'));
+
+        require __DIR__ . '/autoload_static.php';
+        call_user_func(\Composer\Autoload\ComposerStaticInit440454aa6bd2975652e94f60998e9adc::getInitializer($loader));
+
+        $loader->register(true);
+
+        $filesToLoad = \Composer\Autoload\ComposerStaticInit440454aa6bd2975652e94f60998e9adc::$files;
+        $requireFile = \Closure::bind(static function ($fileIdentifier, $file) {
+            if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
+                $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
+
+                require $file;
+            }
+        }, null, null);
+        foreach ($filesToLoad as $fileIdentifier => $file) {
+            $requireFile($fileIdentifier, $file);
+        }
+
+        return $loader;
+    }
+}
--- a/vendor/composer/autoload_static.php
+++ b/vendor/composer/autoload_static.php
@@ -0,0 +1,52 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInit440454aa6bd2975652e94f60998e9adc
+{
+    public static $files = array (
+        '383eaff206634a77a1be54e64e6459c7' => __DIR__ . '/..' . '/sabre/uri/lib/functions.php',
+        '3569eecfeed3bcf0bad3c998a494ecb8' => __DIR__ . '/..' . '/sabre/xml/lib/Deserializer/functions.php',
+        '93aa591bc4ca510c520999e34229ee79' => __DIR__ . '/..' . '/sabre/xml/lib/Serializer/functions.php',
+    );
+
+    public static $prefixLengthsPsr4 = array (
+        'S' =>
+        array (
+            'Sabre\\Xml\\' => 10,
+            'Sabre\\VObject\\' => 14,
+            'Sabre\\Uri\\' => 10,
+        ),
+    );
+
+    public static $prefixDirsPsr4 = array (
+        'Sabre\\Xml\\' =>
+        array (
+            0 => __DIR__ . '/..' . '/sabre/xml/lib',
+        ),
+        'Sabre\\VObject\\' =>
+        array (
+            0 => __DIR__ . '/..' . '/sabre/vobject/lib',
+        ),
+        'Sabre\\Uri\\' =>
+        array (
+            0 => __DIR__ . '/..' . '/sabre/uri/lib',
+        ),
+    );
+
+    public static $classMap = array (
+        'Composer\\InstalledVersions' => __DIR__ . '/..' . '/composer/InstalledVersions.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixLengthsPsr4 = ComposerStaticInit440454aa6bd2975652e94f60998e9adc::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInit440454aa6bd2975652e94f60998e9adc::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInit440454aa6bd2975652e94f60998e9adc::$classMap;
+
+        }, null, ClassLoader::class);
+    }
+}
--- a/vendor/composer/installed.json
+++ b/vendor/composer/installed.json
@@ -0,0 +1,248 @@
+{
+    "packages": [
+        {
+            "name": "sabre/uri",
+            "version": "3.0.2",
+            "version_normalized": "3.0.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/uri.git",
+                "reference": "38eeab6ed9eec435a2188db489d4649c56272c51"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/uri/zipball/38eeab6ed9eec435a2188db489d4649c56272c51",
+                "reference": "38eeab6ed9eec435a2188db489d4649c56272c51",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^3.64",
+                "phpstan/extension-installer": "^1.4",
+                "phpstan/phpstan": "^1.12",
+                "phpstan/phpstan-phpunit": "^1.4",
+                "phpstan/phpstan-strict-rules": "^1.6",
+                "phpunit/phpunit": "^9.6"
+            },
+            "time": "2024-09-04T15:30:08+00:00",
+            "type": "library",
+            "installation-source": "dist",
+            "autoload": {
+                "files": [
+                    "lib/functions.php"
+                ],
+                "psr-4": {
+                    "Sabre\\Uri\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Functions for making sense out of URIs.",
+            "homepage": "http://sabre.io/uri/",
+            "keywords": [
+                "rfc3986",
+                "uri",
+                "url"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/uri/issues",
+                "source": "https://github.com/fruux/sabre-uri"
+            },
+            "install-path": "../sabre/uri"
+        },
+        {
+            "name": "sabre/vobject",
+            "version": "4.5.8",
+            "version_normalized": "4.5.8.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/vobject.git",
+                "reference": "d554eb24d64232922e1eab5896cc2f84b3b9ffb1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/vobject/zipball/d554eb24d64232922e1eab5896cc2f84b3b9ffb1",
+                "reference": "d554eb24d64232922e1eab5896cc2f84b3b9ffb1",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": "^7.1 || ^8.0",
+                "sabre/xml": "^2.1 || ^3.0 || ^4.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12 || ^1.12 || ^2.0",
+                "phpunit/php-invoker": "^2.0 || ^3.1",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.6"
+            },
+            "suggest": {
+                "hoa/bench": "If you would like to run the benchmark scripts"
+            },
+            "time": "2026-01-12T10:45:19+00:00",
+            "bin": [
+                "bin/vobject",
+                "bin/generate_vcards"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.0.x-dev"
+                }
+            },
+            "installation-source": "dist",
+            "autoload": {
+                "psr-4": {
+                    "Sabre\\VObject\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Dominik Tobschall",
+                    "email": "dominik@fruux.com",
+                    "homepage": "http://tobschall.de/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Ivan Enderlin",
+                    "email": "ivan.enderlin@hoa-project.net",
+                    "homepage": "http://mnt.io/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "The VObject library for PHP allows you to easily parse and manipulate iCalendar and vCard objects",
+            "homepage": "http://sabre.io/vobject/",
+            "keywords": [
+                "availability",
+                "freebusy",
+                "iCalendar",
+                "ical",
+                "ics",
+                "jCal",
+                "jCard",
+                "recurrence",
+                "rfc2425",
+                "rfc2426",
+                "rfc2739",
+                "rfc4770",
+                "rfc5545",
+                "rfc5546",
+                "rfc6321",
+                "rfc6350",
+                "rfc6351",
+                "rfc6474",
+                "rfc6638",
+                "rfc6715",
+                "rfc6868",
+                "vCalendar",
+                "vCard",
+                "vcf",
+                "xCal",
+                "xCard"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/vobject/issues",
+                "source": "https://github.com/fruux/sabre-vobject"
+            },
+            "install-path": "../sabre/vobject"
+        },
+        {
+            "name": "sabre/xml",
+            "version": "4.0.6",
+            "version_normalized": "4.0.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sabre-io/xml.git",
+                "reference": "a89257fd188ce30e456b841b6915f27905dfdbe3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sabre-io/xml/zipball/a89257fd188ce30e456b841b6915f27905dfdbe3",
+                "reference": "a89257fd188ce30e456b841b6915f27905dfdbe3",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-xmlreader": "*",
+                "ext-xmlwriter": "*",
+                "lib-libxml": ">=2.6.20",
+                "php": "^7.4 || ^8.0",
+                "sabre/uri": ">=2.0,<4.0.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^3.64",
+                "phpstan/phpstan": "^1.12",
+                "phpunit/phpunit": "^9.6"
+            },
+            "time": "2024-09-06T08:00:55+00:00",
+            "type": "library",
+            "installation-source": "dist",
+            "autoload": {
+                "files": [
+                    "lib/Deserializer/functions.php",
+                    "lib/Serializer/functions.php"
+                ],
+                "psr-4": {
+                    "Sabre\\Xml\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Evert Pot",
+                    "email": "me@evertpot.com",
+                    "homepage": "http://evertpot.com/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Markus Staab",
+                    "email": "markus.staab@redaxo.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "sabre/xml is an XML library that you may not hate.",
+            "homepage": "https://sabre.io/xml/",
+            "keywords": [
+                "XMLReader",
+                "XMLWriter",
+                "dom",
+                "xml"
+            ],
+            "support": {
+                "forum": "https://groups.google.com/group/sabredav-discuss",
+                "issues": "https://github.com/sabre-io/xml/issues",
+                "source": "https://github.com/fruux/sabre-xml"
+            },
+            "install-path": "../sabre/xml"
+        }
+    ],
+    "dev": true,
+    "dev-package-names": []
+}
--- a/vendor/composer/installed.php
+++ b/vendor/composer/installed.php
@@ -0,0 +1,50 @@
+<?php return array(
+    'root' => array(
+        'name' => '__root__',
+        'pretty_version' => 'dev-main',
+        'version' => 'dev-main',
+        'reference' => 'b70aae837708d2d4458a68e4dbc5801ca173048d',
+        'type' => 'library',
+        'install_path' => __DIR__ . '/../../',
+        'aliases' => array(),
+        'dev' => true,
+    ),
+    'versions' => array(
+        '__root__' => array(
+            'pretty_version' => 'dev-main',
+            'version' => 'dev-main',
+            'reference' => 'b70aae837708d2d4458a68e4dbc5801ca173048d',
+            'type' => 'library',
+            'install_path' => __DIR__ . '/../../',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
+        'sabre/uri' => array(
+            'pretty_version' => '3.0.2',
+            'version' => '3.0.2.0',
+            'reference' => '38eeab6ed9eec435a2188db489d4649c56272c51',
+            'type' => 'library',
+            'install_path' => __DIR__ . '/../sabre/uri',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
+        'sabre/vobject' => array(
+            'pretty_version' => '4.5.8',
+            'version' => '4.5.8.0',
+            'reference' => 'd554eb24d64232922e1eab5896cc2f84b3b9ffb1',
+            'type' => 'library',
+            'install_path' => __DIR__ . '/../sabre/vobject',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
+        'sabre/xml' => array(
+            'pretty_version' => '4.0.6',
+            'version' => '4.0.6.0',
+            'reference' => 'a89257fd188ce30e456b841b6915f27905dfdbe3',
+            'type' => 'library',
+            'install_path' => __DIR__ . '/../sabre/xml',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
+    ),
+);
--- a/vendor/composer/platform_check.php
+++ b/vendor/composer/platform_check.php
@@ -0,0 +1,25 @@
+<?php
+
+// platform_check.php @generated by Composer
+
+$issues = array();
+
+if (!(PHP_VERSION_ID >= 70400)) {
+    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.4.0". You are running ' . PHP_VERSION . '.';
+}
+
+if ($issues) {
+    if (!headers_sent()) {
+        header('HTTP/1.1 500 Internal Server Error');
+    }
+    if (!ini_get('display_errors')) {
+        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
+            fwrite(STDERR, 'Composer detected issues in your platform:' . PHP_EOL.PHP_EOL . implode(PHP_EOL, $issues) . PHP_EOL.PHP_EOL);
+        } elseif (!headers_sent()) {
+            echo 'Composer detected issues in your platform:' . PHP_EOL.PHP_EOL . str_replace('You are running '.PHP_VERSION.'.', '', implode(PHP_EOL, $issues)) . PHP_EOL.PHP_EOL;
+        }
+    }
+    throw new \RuntimeException(
+        'Composer detected issues in your platform: ' . implode(' ', $issues)
+    );
+}
--- a/vendor/sabre/uri/LICENSE
+++ b/vendor/sabre/uri/LICENSE
@@ -0,0 +1,27 @@
+Copyright (C) 2014-2019 fruux GmbH (https://fruux.com/)
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name Sabre nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
--- a/vendor/sabre/uri/composer.json
+++ b/vendor/sabre/uri/composer.json
@@ -0,0 +1,68 @@
+{
+    "name": "sabre/uri",
+    "description": "Functions for making sense out of URIs.",
+    "keywords": [
+        "URI",
+        "URL",
+        "rfc3986"
+    ],
+    "homepage": "http://sabre.io/uri/",
+    "license": "BSD-3-Clause",
+    "require": {
+        "php": "^7.4 || ^8.0"
+    },
+    "authors": [
+        {
+            "name": "Evert Pot",
+            "email": "me@evertpot.com",
+            "homepage": "http://evertpot.com/",
+            "role": "Developer"
+        }
+    ],
+    "support": {
+        "forum": "https://groups.google.com/group/sabredav-discuss",
+        "source": "https://github.com/fruux/sabre-uri"
+    },
+    "autoload": {
+        "files" : [
+            "lib/functions.php"
+        ],
+        "psr-4" : {
+            "Sabre\\Uri\\" : "lib/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Sabre\\Uri\\": "tests/Uri"
+        }
+    },
+    "require-dev": {
+        "friendsofphp/php-cs-fixer": "^3.64",
+        "phpstan/phpstan": "^1.12",
+        "phpstan/phpstan-phpunit": "^1.4",
+        "phpstan/phpstan-strict-rules": "^1.6",
+        "phpstan/extension-installer": "^1.4",
+        "phpunit/phpunit" : "^9.6"
+    },
+    "scripts": {
+        "phpstan": [
+            "phpstan analyse lib tests"
+        ],
+        "cs-fixer": [
+            "php-cs-fixer fix"
+        ],
+        "phpunit": [
+            "phpunit --configuration tests/phpunit.xml"
+        ],
+        "test": [
+            "composer phpstan",
+            "composer cs-fixer",
+            "composer phpunit"
+        ]
+    },
+    "config": {
+        "allow-plugins": {
+            "phpstan/extension-installer": true
+        }
+    }
+}
--- a/vendor/sabre/uri/lib/InvalidUriException.php
+++ b/vendor/sabre/uri/lib/InvalidUriException.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\Uri;
+
+/**
+ * Invalid Uri.
+ *
+ * This is thrown when an attempt was made to use Sabre\Uri parse a uri that
+ * it could not.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (https://evertpot.com/)
+ * @license http://sabre.io/license/
+ */
+class InvalidUriException extends \Exception
+{
+}
--- a/vendor/sabre/uri/lib/Version.php
+++ b/vendor/sabre/uri/lib/Version.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\Uri;
+
+/**
+ * This class contains the version number for this package.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/
+ */
+class Version
+{
+    /**
+     * Full version number.
+     */
+    public const VERSION = '3.0.2';
+}
--- a/vendor/sabre/uri/lib/functions.php
+++ b/vendor/sabre/uri/lib/functions.php
@@ -0,0 +1,425 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\Uri;
+
+/**
+ * This file contains all the uri handling functions.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/
+ */
+
+/**
+ * Resolves relative urls, like a browser would.
+ *
+ * This function takes a basePath, which itself _may_ also be relative, and
+ * then applies the relative path on top of it.
+ *
+ * @throws InvalidUriException
+ */
+function resolve(string $basePath, string $newPath): string
+{
+    $delta = parse($newPath);
+
+    // If the new path defines a scheme, it's absolute and we can just return
+    // that.
+    if (null !== $delta['scheme']) {
+        return build($delta);
+    }
+
+    $base = parse($basePath);
+    $pick = function ($part) use ($base, $delta) {
+        if (null !== $delta[$part]) {
+            return $delta[$part];
+        } elseif (null !== $base[$part]) {
+            return $base[$part];
+        }
+
+        return null;
+    };
+
+    $newParts = [];
+
+    $newParts['scheme'] = $pick('scheme');
+    $newParts['host'] = $pick('host');
+    $newParts['port'] = $pick('port');
+
+    if (is_string($delta['path']) and strlen($delta['path']) > 0) {
+        // If the path starts with a slash
+        if ('/' === $delta['path'][0]) {
+            $path = $delta['path'];
+        } else {
+            // Removing last component from base path.
+            $path = (string) $base['path'];
+            $length = strrpos($path, '/');
+            if (false !== $length) {
+                $path = substr($path, 0, $length);
+            }
+            $path .= '/'.$delta['path'];
+        }
+    } else {
+        $path = $base['path'] ?? '/';
+        if ('' === $path) {
+            $path = '/';
+        }
+    }
+    // Removing .. and .
+    $pathParts = explode('/', $path);
+    $newPathParts = [];
+    foreach ($pathParts as $pathPart) {
+        switch ($pathPart) {
+            // case '' :
+            case '.':
+                break;
+            case '..':
+                array_pop($newPathParts);
+                break;
+            default:
+                $newPathParts[] = $pathPart;
+                break;
+        }
+    }
+
+    $path = implode('/', $newPathParts);
+
+    // If the source url ended with a /, we want to preserve that.
+    $newParts['path'] = 0 === strpos($path, '/') ? $path : '/'.$path;
+    // From PHP 8, no "?" query at all causes 'query' to be null.
+    // An empty query "http://example.com/foo?" causes 'query' to be the empty string
+    if (null !== $delta['query'] && '' !== $delta['query']) {
+        $newParts['query'] = $delta['query'];
+    } elseif (isset($base['query']) && null === $delta['host'] && null === $delta['path']) {
+        // Keep the old query if host and path didn't change
+        $newParts['query'] = $base['query'];
+    }
+    // From PHP 8, no "#" fragment at all causes 'fragment' to be null.
+    // An empty fragment "http://example.com/foo#" causes 'fragment' to be the empty string
+    if (null !== $delta['fragment'] && '' !== $delta['fragment']) {
+        $newParts['fragment'] = $delta['fragment'];
+    }
+
+    return build($newParts);
+}
+
+/**
+ * Takes a URI or partial URI as its argument, and normalizes it.
+ *
+ * After normalizing a URI, you can safely compare it to other URIs.
+ * This function will for instance convert a %7E into a tilde, according to
+ * rfc3986.
+ *
+ * It will also change a %3a into a %3A.
+ *
+ * @throws InvalidUriException
+ */
+function normalize(string $uri): string
+{
+    $parts = parse($uri);
+
+    if (null !== $parts['path']) {
+        $pathParts = explode('/', ltrim($parts['path'], '/'));
+        $newPathParts = [];
+        foreach ($pathParts as $pathPart) {
+            switch ($pathPart) {
+                case '.':
+                    // skip
+                    break;
+                case '..':
+                    // One level up in the hierarchy
+                    array_pop($newPathParts);
+                    break;
+                default:
+                    // Ensuring that everything is correctly percent-encoded.
+                    $newPathParts[] = rawurlencode(rawurldecode($pathPart));
+                    break;
+            }
+        }
+        $parts['path'] = '/'.implode('/', $newPathParts);
+    }
+
+    if (null !== $parts['scheme']) {
+        $parts['scheme'] = strtolower($parts['scheme']);
+        $defaultPorts = [
+            'http' => '80',
+            'https' => '443',
+        ];
+
+        if (null !== $parts['port'] && isset($defaultPorts[$parts['scheme']]) && $defaultPorts[$parts['scheme']] == $parts['port']) {
+            // Removing default ports.
+            unset($parts['port']);
+        }
+        // A few HTTP specific rules.
+        switch ($parts['scheme']) {
+            case 'http':
+            case 'https':
+                if (null === $parts['path']) {
+                    // An empty path is equivalent to / in http.
+                    $parts['path'] = '/';
+                }
+                break;
+        }
+    }
+
+    if (null !== $parts['host']) {
+        $parts['host'] = strtolower($parts['host']);
+    }
+
+    return build($parts);
+}
+
+/**
+ * Parses a URI and returns its individual components.
+ *
+ * This method largely behaves the same as PHP's parse_url, except that it will
+ * return an array with all the array keys, including the ones that are not
+ * set by parse_url, which makes it a bit easier to work with.
+ *
+ * Unlike PHP's parse_url, it will also convert any non-ascii characters to
+ * percent-encoded strings. PHP's parse_url corrupts these characters on OS X.
+ *
+ * In the return array, key "port" is an int value. Other keys have a string value.
+ * "Unused" keys have value null.
+ *
+ * @return array{scheme: string|null, host: string|null, path: string|null, port: positive-int|null, user: string|null, query: string|null, fragment: string|null}
+ *
+ * @throws InvalidUriException
+ */
+function parse(string $uri): array
+{
+    // Normally a URI must be ASCII. However, often it's not and
+    // parse_url might corrupt these strings.
+    //
+    // For that reason we take any non-ascii characters from the uri and
+    // uriencode them first.
+    $uri = preg_replace_callback(
+        '/[^[:ascii:]]/u',
+        function ($matches) {
+            return rawurlencode($matches[0]);
+        },
+        $uri
+    );
+
+    if (null === $uri) {
+        throw new InvalidUriException('Invalid, or could not parse URI');
+    }
+
+    $result = parse_url($uri);
+    if (false === $result) {
+        $result = _parse_fallback($uri);
+    } else {
+        // Add empty host and leading slash to Windows file paths
+        // file:///C:/path or file:///C:\path
+        // Note: the regex fragment [a-zA-Z]:[\/\\\\].* end up being
+        // [a-zA-Z]:[\/\\].*
+        // The 4 backslash in a row are the way to get 2 backslash into the actual string
+        // that is used as the regex. The 2 backslash are then the way to get 1 backslash
+        // character into the character set "a forward slash or a backslash"
+        if (isset($result['scheme']) && 'file' === $result['scheme'] && isset($result['path'])
+            && 1 === preg_match('/^(?<windows_path> [a-zA-Z]:([\/\\\\].*)?)$/x', $result['path'])) {
+            $result['path'] = '/'.$result['path'];
+            $result['host'] = '';
+        }
+    }
+
+    /*
+     * phpstan is not able to process all the things that happen while this function
+     * constructs the result array. It only understands the $result is
+     * non-empty-array<string, mixed>
+     *
+     * But the detail of the returned array is correctly specified in the PHPdoc
+     * above the function call.
+     *
+     * @phpstan-ignore-next-line
+     */
+    return
+         $result + [
+             'scheme' => null,
+             'host' => null,
+             'path' => null,
+             'port' => null,
+             'user' => null,
+             'query' => null,
+             'fragment' => null,
+         ];
+}
+
+/**
+ * This function takes the components returned from PHP's parse_url, and uses
+ * it to generate a new uri.
+ *
+ * @param array<string, int|string|null> $parts
+ */
+function build(array $parts): string
+{
+    $uri = '';
+
+    $authority = '';
+    if (isset($parts['host'])) {
+        $authority = $parts['host'];
+        if (isset($parts['user'])) {
+            $authority = $parts['user'].'@'.$authority;
+        }
+        if (isset($parts['port'])) {
+            $authority = $authority.':'.$parts['port'];
+        }
+    }
+
+    if (isset($parts['scheme'])) {
+        // If there's a scheme, there's also a host.
+        $uri = $parts['scheme'].':';
+    }
+    if ('' !== $authority || (isset($parts['scheme']) && 'file' === $parts['scheme'])) {
+        // No scheme, but there is a host.
+        $uri .= '//'.$authority;
+    }
+
+    if (isset($parts['path'])) {
+        $uri .= $parts['path'];
+    }
+    if (isset($parts['query'])) {
+        $uri .= '?'.$parts['query'];
+    }
+    if (isset($parts['fragment'])) {
+        $uri .= '#'.$parts['fragment'];
+    }
+
+    return $uri;
+}
+
+/**
+ * Returns the 'dirname' and 'basename' for a path.
+ *
+ * The reason there is a custom function for this purpose, is because
+ * basename() is locale aware (behaviour changes if C locale or a UTF-8 locale
+ * is used) and we need a method that just operates on UTF-8 characters.
+ *
+ * In addition basename and dirname are platform aware, and will treat
+ * backslash (\) as a directory separator on Windows.
+ *
+ * This method returns the 2 components as an array.
+ *
+ * If there is no dirname, it will return an empty string. Any / appearing at
+ * the end of the string is stripped off.
+ *
+ * @return list<mixed>
+ */
+function split(string $path): array
+{
+    $matches = [];
+    if (1 === preg_match('/^(?:(?:(.*)(?:\/+))?([^\/]+))(?:\/?)$/u', $path, $matches)) {
+        return [$matches[1], $matches[2]];
+    }
+
+    return [null, null];
+}
+
+/**
+ * This function is another implementation of parse_url, except this one is
+ * fully written in PHP.
+ *
+ * The reason is that the PHP bug team is not willing to admit that there are
+ * bugs in the parse_url implementation.
+ *
+ * This function is only called if the main parse method fails. It's pretty
+ * crude and probably slow, so the original parse_url is usually preferred.
+ *
+ * @return array{scheme: string|null, host: string|null, path: string|null, port: positive-int|null, user: string|null, query: string|null, fragment: string|null}
+ *
+ * @throws InvalidUriException
+ */
+function _parse_fallback(string $uri): array
+{
+    // Normally a URI must be ASCII, however. However, often it's not and
+    // parse_url might corrupt these strings.
+    //
+    // For that reason we take any non-ascii characters from the uri and
+    // uriencode them first.
+    $uri = preg_replace_callback(
+        '/[^[:ascii:]]/u',
+        function ($matches) {
+            return rawurlencode($matches[0]);
+        },
+        $uri
+    );
+
+    if (null === $uri) {
+        throw new InvalidUriException('Invalid, or could not parse URI');
+    }
+
+    $result = [
+        'scheme' => null,
+        'host' => null,
+        'port' => null,
+        'user' => null,
+        'path' => null,
+        'fragment' => null,
+        'query' => null,
+    ];
+
+    if (1 === preg_match('% ^([A-Za-z][A-Za-z0-9+-\.]+): %x', $uri, $matches)) {
+        $result['scheme'] = $matches[1];
+        // Take what's left.
+        $uri = substr($uri, strlen($result['scheme']) + 1);
+        if (false === $uri) {
+            // There was nothing left.
+            $uri = '';
+        }
+    }
+
+    // Taking off a fragment part
+    if (false !== strpos($uri, '#')) {
+        list($uri, $result['fragment']) = explode('#', $uri, 2);
+    }
+    // Taking off the query part
+    if (false !== strpos($uri, '?')) {
+        list($uri, $result['query']) = explode('?', $uri, 2);
+    }
+
+    if ('///' === substr($uri, 0, 3)) {
+        // The triple slash uris are a bit unusual, but we have special handling
+        // for them.
+        $path = substr($uri, 2);
+        if (false === $path) {
+            throw new \RuntimeException('The string cannot be false');
+        }
+        $result['path'] = $path;
+        $result['host'] = '';
+    } elseif ('//' === substr($uri, 0, 2)) {
+        // Uris that have an authority part.
+        $regex = '%^
+            //
+            (?: (?<user> [^:@]+) (: (?<pass> [^@]+)) @)?
+            (?<host> ( [^:/]* | \[ [^\]]+ \] ))
+            (?: : (?<port> [0-9]+))?
+            (?<path> / .*)?
+          $%x';
+        if (1 !== preg_match($regex, $uri, $matches)) {
+            throw new InvalidUriException('Invalid, or could not parse URI');
+        }
+        if (isset($matches['host']) && '' !== $matches['host']) {
+            $result['host'] = $matches['host'];
+        }
+        if (isset($matches['port'])) {
+            $port = (int) $matches['port'];
+            if ($port > 0) {
+                $result['port'] = $port;
+            }
+        }
+        if (isset($matches['path'])) {
+            $result['path'] = $matches['path'];
+        }
+        if (isset($matches['user']) && '' !== $matches['user']) {
+            $result['user'] = $matches['user'];
+        }
+        if (isset($matches['pass']) && '' !== $matches['pass']) {
+            $result['pass'] = $matches['pass'];
+        }
+    } else {
+        $result['path'] = $uri;
+    }
+
+    return $result;
+}
--- a/vendor/sabre/vobject/LICENSE
+++ b/vendor/sabre/vobject/LICENSE
@@ -0,0 +1,27 @@
+Copyright (C) 2011-2016 fruux GmbH (https://fruux.com/)
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name Sabre nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
--- a/vendor/sabre/vobject/README.md
+++ b/vendor/sabre/vobject/README.md
@@ -0,0 +1,55 @@
+sabre/vobject
+=============
+
+The VObject library allows you to easily parse and manipulate [iCalendar](https://tools.ietf.org/html/rfc5545)
+and [vCard](https://tools.ietf.org/html/rfc6350) objects using PHP.
+
+The goal of the VObject library is to create a very complete library, with an easy-to-use API.
+
+
+Installation
+------------
+
+Make sure you have [Composer][1] installed, and then run:
+
+    composer require sabre/vobject "^4.0"
+
+This package requires PHP 5.5. If you need the PHP 5.3/5.4 version of this package instead, use:
+
+
+    composer require sabre/vobject "^3.4"
+
+
+Usage
+-----
+
+* [Working with vCards](http://sabre.io/vobject/vcard/)
+* [Working with iCalendar](http://sabre.io/vobject/icalendar/)
+
+
+
+Build status
+------------
+
+| branch | status |
+| ------ | ------ |
+| master | [![Build Status](https://travis-ci.org/sabre-io/vobject.svg?branch=master)](https://travis-ci.org/sabre-io/vobject) |
+| 3.5    | [![Build Status](https://travis-ci.org/sabre-io/vobject.svg?branch=3.5)](https://travis-ci.org/sabre-io/vobject) |
+| 3.4    | [![Build Status](https://travis-ci.org/sabre-io/vobject.svg?branch=3.4)](https://travis-ci.org/sabre-io/vobject) |
+| 3.1    | [![Build Status](https://travis-ci.org/sabre-io/vobject.svg?branch=3.1)](https://travis-ci.org/sabre-io/vobject) |
+| 2.1    | [![Build Status](https://travis-ci.org/sabre-io/vobject.svg?branch=2.1)](https://travis-ci.org/sabre-io/vobject) |
+| 2.0    | [![Build Status](https://travis-ci.org/sabre-io/vobject.svg?branch=2.0)](https://travis-ci.org/sabre-io/vobject) |
+
+
+
+Support
+-------
+
+Head over to the [SabreDAV mailing list](http://groups.google.com/group/sabredav-discuss) for any questions.
+
+Made at fruux
+-------------
+
+This library is being developed by [fruux](https://fruux.com/). Drop us a line for commercial services or enterprise support.
+
+[1]: https://getcomposer.org/
--- a/vendor/sabre/vobject/bin/bench.php
+++ b/vendor/sabre/vobject/bin/bench.php
@@ -0,0 +1,12 @@
+#!/usr/bin/env php
+<?php
+
+include __DIR__.'/../vendor/autoload.php';
+
+$data = stream_get_contents(STDIN);
+
+$start = microtime(true);
+
+$lol = Sabre\VObject\Reader::read($data);
+
+echo 'time: '.(microtime(true) - $start)."\n";
--- a/vendor/sabre/vobject/bin/bench_freebusygenerator.php
+++ b/vendor/sabre/vobject/bin/bench_freebusygenerator.php
@@ -0,0 +1,53 @@
+<?php
+
+include __DIR__.'/../vendor/autoload.php';
+
+if ($argc < 2) {
+    echo 'sabre/vobject ', Sabre\VObject\Version::VERSION, " freebusy benchmark\n";
+    echo "\n";
+    echo "This script can be used to measure the speed of generating a\n";
+    echo "free-busy report based on a calendar.\n";
+    echo "\n";
+    echo "The process will be repeated 100 times to get accurate stats\n";
+    echo "\n";
+    echo 'Usage: '.$argv[0]." inputfile.ics\n";
+    exit();
+}
+
+list(, $inputFile) = $argv;
+
+$bench = new Hoa\Bench\Bench();
+$bench->parse->start();
+
+$vcal = Sabre\VObject\Reader::read(fopen($inputFile, 'r'));
+
+$bench->parse->stop();
+
+$repeat = 100;
+$start = new \DateTime('2000-01-01');
+$end = new \DateTime('2020-01-01');
+$timeZone = new \DateTimeZone('America/Toronto');
+
+$bench->fb->start();
+
+for ($i = 0; $i < $repeat; ++$i) {
+    $fb = new Sabre\VObject\FreeBusyGenerator($start, $end, $vcal, $timeZone);
+    $results = $fb->getResult();
+}
+$bench->fb->stop();
+
+echo $bench,"\n";
+
+function formatMemory($input)
+{
+    if (strlen($input) > 6) {
+        return round($input / (1024 * 1024)).'M';
+    } elseif (strlen($input) > 3) {
+        return round($input / 1024).'K';
+    }
+}
+
+unset($input, $splitter);
+
+echo 'peak memory usage: '.formatMemory(memory_get_peak_usage()), "\n";
+echo 'current memory usage: '.formatMemory(memory_get_usage()), "\n";
--- a/vendor/sabre/vobject/bin/bench_manipulatevcard.php
+++ b/vendor/sabre/vobject/bin/bench_manipulatevcard.php
@@ -0,0 +1,64 @@
+<?php
+
+include __DIR__.'/../vendor/autoload.php';
+
+if ($argc < 2) {
+    echo 'sabre/vobject ', Sabre\VObject\Version::VERSION, " manipulation benchmark\n";
+    echo "\n";
+    echo "This script can be used to measure the speed of opening a large amount of\n";
+    echo "vcards, making a few alterations and serializing them again.\n";
+    echo 'system.';
+    echo "\n";
+    echo 'Usage: '.$argv[0]." inputfile.vcf\n";
+    exit();
+}
+
+list(, $inputFile) = $argv;
+
+$input = file_get_contents($inputFile);
+
+$splitter = new Sabre\VObject\Splitter\VCard($input);
+
+$bench = new Hoa\Bench\Bench();
+
+while (true) {
+    $bench->parse->start();
+    $vcard = $splitter->getNext();
+    $bench->parse->pause();
+
+    if (!$vcard) {
+        break;
+    }
+
+    $bench->manipulate->start();
+    $vcard->{'X-FOO'} = 'Random new value!';
+    $emails = [];
+    if (isset($vcard->EMAIL)) {
+        foreach ($vcard->EMAIL as $email) {
+            $emails[] = (string) $email;
+        }
+    }
+    $bench->manipulate->pause();
+
+    $bench->serialize->start();
+    $vcard2 = $vcard->serialize();
+    $bench->serialize->pause();
+
+    $vcard->destroy();
+}
+
+echo $bench,"\n";
+
+function formatMemory($input)
+{
+    if (strlen($input) > 6) {
+        return round($input / (1024 * 1024)).'M';
+    } elseif (strlen($input) > 3) {
+        return round($input / 1024).'K';
+    }
+}
+
+unset($input, $splitter);
+
+echo 'peak memory usage: '.formatMemory(memory_get_peak_usage()), "\n";
+echo 'current memory usage: '.formatMemory(memory_get_usage()), "\n";
--- a/vendor/sabre/vobject/bin/fetch_windows_zones.php
+++ b/vendor/sabre/vobject/bin/fetch_windows_zones.php
@@ -0,0 +1,48 @@
+#!/usr/bin/env php
+<?php
+
+$windowsZonesUrl = 'https://raw.githubusercontent.com/unicode-org/cldr/master/common/supplemental/windowsZones.xml';
+$outputFile = __DIR__.'/../lib/timezonedata/windowszones.php';
+
+echo 'Fetching timezone map from: '.$windowsZonesUrl, "\n";
+
+$data = file_get_contents($windowsZonesUrl);
+$xml = simplexml_load_string($data);
+
+$map = [];
+
+foreach ($xml->xpath('//mapZone') as $mapZone) {
+    $from = (string) $mapZone['other'];
+    $to = (string) $mapZone['type'];
+
+    list($to) = explode(' ', $to, 2);
+
+    if (!isset($map[$from])) {
+        $map[$from] = $to;
+    }
+}
+
+ksort($map);
+echo "Writing to: $outputFile\n";
+
+$f = fopen($outputFile, 'w');
+fwrite($f, "<?php\n\n");
+fwrite($f, "/**\n");
+fwrite($f, " * Automatically generated timezone file\n");
+fwrite($f, " *\n");
+fwrite($f, ' * Last update: '.date(DATE_W3C)."\n");
+fwrite($f, ' * Source: '.$windowsZonesUrl."\n");
+fwrite($f, " *\n");
+fwrite($f, " * @copyright Copyright (C) fruux GmbH (https://fruux.com/).\n");
+fwrite($f, " * @license http://sabre.io/license/ Modified BSD License\n");
+fwrite($f, " */\n");
+fwrite($f, "\n");
+fwrite($f, 'return ');
+fwrite($f, var_export($map, true).';');
+fclose($f);
+
+echo "Formatting\n";
+
+exec(__DIR__.'/../vendor/bin/php-cs-fixer fix '.escapeshellarg($outputFile));
+
+echo "Done\n";
--- a/vendor/sabre/vobject/bin/generate_vcards
+++ b/vendor/sabre/vobject/bin/generate_vcards
@@ -0,0 +1,241 @@
+#!/usr/bin/env php
+<?php
+
+namespace Sabre\VObject;
+
+// This sucks.. we have to try to find the composer autoloader. But chances
+// are, we can't find it this way. So we'll do our bestest
+$paths = [
+    __DIR__ . '/../vendor/autoload.php',  // In case vobject is cloned directly
+    __DIR__ . '/../../../autoload.php',   // In case vobject is a composer dependency.
+];
+
+foreach($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+if (!class_exists('Sabre\\VObject\\Version')) {
+    fwrite(STDERR, "Composer autoloader could not be properly loaded.\n");
+    die(1);
+}
+
+if ($argc < 2) {
+
+    $version = Version::VERSION;
+
+    $help = <<<HI
+sabre/vobject $version
+Usage:
+    generate_vcards [count]
+
+Options:
+    count   The number of random vcards to generate
+
+Examples:
+    generate_vcards 1000 > testdata.vcf
+
+HI;
+
+    fwrite(STDERR, $help);
+    exit(2);
+}
+
+$count = (int)$argv[1];
+if ($count < 1) {
+    fwrite(STDERR, "Count must be at least 1\n");
+    exit(2);
+}
+
+fwrite(STDERR, "sabre/vobject " . Version::VERSION . "\n");
+fwrite(STDERR, "Generating " . $count . " vcards in vCard 4.0 format\n");
+
+/**
+ * The following list is just some random data we compiled from various
+ * sources online.
+ *
+ * Very little thought went into compiling this list, and certainly nothing
+ * political or ethical.
+ *
+ * We would _love_ more additions to this to add more variation to this list.
+ *
+ * Send us PR's and don't be shy adding your own first and last name for fun.
+ */
+
+$sets = array(
+    "nl" => array(
+        "country" => "Netherlands",
+        "boys" => array(
+            "Anno",
+            "Bram",
+            "Daan",
+            "Evert",
+            "Finn",
+            "Jayden",
+            "Jens",
+            "Jesse",
+            "Levi",
+            "Lucas",
+            "Luuk",
+            "Milan",
+            "René",
+            "Sem",
+            "Sibrand",
+            "Willem",
+        ),
+        "girls" => array(
+            "Celia",
+            "Emma",
+            "Fenna",
+            "Geke",
+            "Inge",
+            "Julia",
+            "Lisa",
+            "Lotte",
+            "Mila",
+            "Sara",
+            "Sophie",
+            "Tess",
+            "Zoë",
+        ),
+        "last" => array(
+            "Bakker",
+            "Bos",
+            "De Boer",
+            "De Groot",
+            "De Jong",
+            "De Vries",
+            "Jansen",
+            "Janssen",
+            "Meyer",
+            "Mulder",
+            "Peters",
+            "Smit",
+            "Van Dijk",
+            "Van den Berg",
+            "Visser",
+            "Vos",
+        ),
+    ),
+    "us" => array(
+        "country" => "United States",
+        "boys" => array(
+            "Aiden",
+            "Alexander",
+            "Charles",
+            "David",
+            "Ethan",
+            "Jacob",
+            "James",
+            "Jayden",
+            "John",
+            "Joseph",
+            "Liam",
+            "Mason",
+            "Michael",
+            "Noah",
+            "Richard",
+            "Robert",
+            "Thomas",
+            "William",
+        ),
+        "girls" => array(
+            "Ava",
+            "Barbara",
+            "Chloe",
+            "Dorothy",
+            "Elizabeth",
+            "Emily",
+            "Emma",
+            "Isabella",
+            "Jennifer",
+            "Lily",
+            "Linda",
+            "Margaret",
+            "Maria",
+            "Mary",
+            "Mia",
+            "Olivia",
+            "Patricia",
+            "Roxy",
+            "Sophia",
+            "Susan",
+            "Zoe",
+        ),
+        "last" => array(
+            "Smith",
+            "Johnson",
+            "Williams",
+            "Jones",
+            "Brown",
+            "Davis",
+            "Miller",
+            "Wilson",
+            "Moore",
+            "Taylor",
+            "Anderson",
+            "Thomas",
+            "Jackson",
+            "White",
+            "Harris",
+            "Martin",
+            "Thompson",
+            "Garcia",
+            "Martinez",
+            "Robinson",
+        ),
+    ),
+);
+
+$current = 0;
+
+$r = function($arr) {
+
+    return $arr[mt_rand(0,count($arr)-1)];
+
+};
+
+$bdayStart = strtotime('-85 years');
+$bdayEnd = strtotime('-20 years');
+
+while($current < $count) {
+
+    $current++;
+    fwrite(STDERR, "\033[100D$current/$count");
+
+    $country = array_rand($sets);
+    $gender = mt_rand(0,1)?'girls':'boys';
+
+    $vcard = new Component\VCard(array(
+        'VERSION' => '4.0',
+        'FN' => $r($sets[$country][$gender]) . ' ' . $r($sets[$country]['last']),
+        'UID' => UUIDUtil::getUUID(),
+    ));
+
+    $bdayRatio = mt_rand(0,9);
+
+    if($bdayRatio < 2) {
+        // 20% has a birthday property with a full date
+        $dt = new \DateTime('@' . mt_rand($bdayStart, $bdayEnd));
+        $vcard->add('BDAY', $dt->format('Ymd'));
+
+    } elseif ($bdayRatio < 3) {
+        // 10% we only know the month and date of
+        $dt = new \DateTime('@' . mt_rand($bdayStart, $bdayEnd));
+        $vcard->add('BDAY', '--' . $dt->format('md'));
+    }
+    if ($result = $vcard->validate()) {
+        ob_start();
+        echo "\nWe produced an invalid vcard somehow!\n";
+        foreach($result as $message) {
+            echo "  " . $message['message'] . "\n";
+        }
+        fwrite(STDERR, ob_get_clean());
+    }
+    echo $vcard->serialize();
+
+}
+
+fwrite(STDERR,"\nDone.\n");
--- a/vendor/sabre/vobject/bin/generateicalendardata.php
+++ b/vendor/sabre/vobject/bin/generateicalendardata.php
@@ -0,0 +1,87 @@
+#!/usr/bin/env php
+<?php
+
+use Sabre\VObject;
+
+if ($argc < 2) {
+    $cmd = $argv[0];
+    fwrite(STDERR, <<<HI
+Fruux test data generator
+
+This script generates a lot of test data. This is used for profiling and stuff.
+Currently it just generates events in a single calendar.
+
+The iCalendar output goes to stdout. Other messages to stderr.
+
+{$cmd} [events]
+
+
+HI
+    );
+    exit();
+}
+
+$events = 100;
+
+if (isset($argv[1])) {
+    $events = (int) $argv[1];
+}
+
+include __DIR__.'/../vendor/autoload.php';
+
+fwrite(STDERR, 'Generating '.$events." events\n");
+
+$currentDate = new DateTime('-'.round($events / 2).' days');
+
+$calendar = new VObject\Component\VCalendar();
+
+$ii = 0;
+
+while ($ii < $events) {
+    ++$ii;
+
+    $event = $calendar->add('VEVENT');
+    $event->DTSTART = 'bla';
+    $event->SUMMARY = 'Event #'.$ii;
+    $event->UID = md5(microtime(true));
+
+    $doctorRandom = mt_rand(1, 1000);
+
+    switch ($doctorRandom) {
+        // All-day event
+        case 1:
+            $event->DTEND = 'bla';
+            $dtStart = clone $currentDate;
+            $dtEnd = clone $currentDate;
+            $dtEnd->modify('+'.mt_rand(1, 3).' days');
+            $event->DTSTART->setDateTime($dtStart);
+            $event->DTSTART['VALUE'] = 'DATE';
+            $event->DTEND->setDateTime($dtEnd);
+            break;
+        case 2:
+            $event->RRULE = 'FREQ=DAILY;COUNT='.mt_rand(1, 10);
+            // no break intentional
+        default:
+            $dtStart = clone $currentDate;
+            $dtStart->setTime(mt_rand(1, 23), mt_rand(0, 59), mt_rand(0, 59));
+            $event->DTSTART->setDateTime($dtStart);
+            $event->DURATION = 'PT'.mt_rand(1, 3).'H';
+            break;
+    }
+
+    $currentDate->modify('+ '.mt_rand(0, 3).' days');
+}
+fwrite(STDERR, "Validating\n");
+
+$result = $calendar->validate();
+if ($result) {
+    fwrite(STDERR, "Errors!\n");
+    fwrite(STDERR, print_r($result, true));
+    exit(-1);
+}
+
+fwrite(STDERR, "Serializing this beast\n");
+
+echo $calendar->serialize();
+
+fwrite(STDERR, "done.\n");
--- a/vendor/sabre/vobject/bin/mergeduplicates.php
+++ b/vendor/sabre/vobject/bin/mergeduplicates.php
@@ -0,0 +1,160 @@
+#!/usr/bin/env php
+<?php
+
+namespace Sabre\VObject;
+
+// This sucks.. we have to try to find the composer autoloader. But chances
+// are, we can't find it this way. So we'll do our bestest
+$paths = [
+    __DIR__.'/../vendor/autoload.php',  // In case vobject is cloned directly
+    __DIR__.'/../../../autoload.php',   // In case vobject is a composer dependency.
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+if (!class_exists('Sabre\\VObject\\Version')) {
+    fwrite(STDERR, "Composer autoloader could not be loaded.\n");
+    exit(1);
+}
+
+echo 'sabre/vobject ', Version::VERSION, " duplicate contact merge tool\n";
+
+if ($argc < 3) {
+    echo "\n";
+    echo 'Usage: ', $argv[0], " input.vcf output.vcf [debug.log]\n";
+    exit(1);
+}
+
+$input = fopen($argv[1], 'r');
+$output = fopen($argv[2], 'w');
+$debug = isset($argv[3]) ? fopen($argv[3], 'w') : null;
+
+$splitter = new Splitter\VCard($input);
+
+// The following properties are ignored. If they appear in some vcards
+// but not in others, we don't consider them for the sake of finding
+// differences.
+$ignoredProperties = [
+    'PRODID',
+    'VERSION',
+    'REV',
+    'UID',
+    'X-ABLABEL',
+];
+
+$collectedNames = [];
+
+$stats = [
+    'Total vcards' => 0,
+    'No FN property' => 0,
+    'Ignored duplicates' => 0,
+    'Merged values' => 0,
+    'Error' => 0,
+    'Unique cards' => 0,
+    'Total written' => 0,
+];
+
+function writeStats()
+{
+    global $stats;
+    foreach ($stats as $name => $value) {
+        echo str_pad($name, 23, ' ', STR_PAD_RIGHT), str_pad($value, 6, ' ', STR_PAD_LEFT), "\n";
+    }
+    // Moving cursor back a few lines.
+    echo "\033[".count($stats).'A';
+}
+
+function write($vcard)
+{
+    global $stats, $output;
+
+    ++$stats['Total written'];
+    fwrite($output, $vcard->serialize()."\n");
+}
+
+while ($vcard = $splitter->getNext()) {
+    ++$stats['Total vcards'];
+    writeStats();
+
+    $fn = isset($vcard->FN) ? (string) $vcard->FN : null;
+
+    if (empty($fn)) {
+        // Immediately write this vcard, we don't compare it.
+        ++$stats['No FN property'];
+        ++$stats['Unique cards'];
+        write($vcard);
+        $vcard->destroy();
+        continue;
+    }
+
+    if (!isset($collectedNames[$fn])) {
+        $collectedNames[$fn] = $vcard;
+        ++$stats['Unique cards'];
+        continue;
+    } else {
+        // Starting comparison for all properties. We only check if properties
+        // in the current vcard exactly appear in the earlier vcard as well.
+        foreach ($vcard->children() as $newProp) {
+            if (in_array($newProp->name, $ignoredProperties)) {
+                // We don't care about properties such as UID and REV.
+                continue;
+            }
+            $ok = false;
+            foreach ($collectedNames[$fn]->select($newProp->name) as $compareProp) {
+                if ($compareProp->serialize() === $newProp->serialize()) {
+                    $ok = true;
+                    break;
+                }
+            }
+
+            if (!$ok) {
+                if ('EMAIL' === $newProp->name || 'TEL' === $newProp->name) {
+                    // We're going to make another attempt to find this
+                    // property, this time just by value. If we find it, we
+                    // consider it a success.
+                    foreach ($collectedNames[$fn]->select($newProp->name) as $compareProp) {
+                        if ($compareProp->getValue() === $newProp->getValue()) {
+                            $ok = true;
+                            break;
+                        }
+                    }
+
+                    if (!$ok) {
+                        // Merging the new value in the old vcard.
+                        $collectedNames[$fn]->add(clone $newProp);
+                        $ok = true;
+                        ++$stats['Merged values'];
+                    }
+                }
+            }
+
+            if (!$ok) {
+                // echo $newProp->serialize() . " does not appear in earlier vcard!\n";
+                ++$stats['Error'];
+                if ($debug) {
+                    fwrite($debug, "Missing '".$newProp->name."' property in duplicate. Earlier vcard:\n".$collectedNames[$fn]->serialize()."\n\nLater:\n".$vcard->serialize()."\n\n");
+                }
+
+                $vcard->destroy();
+                continue 2;
+            }
+        }
+    }
+
+    $vcard->destroy();
+    ++$stats['Ignored duplicates'];
+}
+
+foreach ($collectedNames as $vcard) {
+    // Overwriting any old PRODID
+    $vcard->PRODID = '-//Sabre//Sabre VObject '.Version::VERSION.'//EN';
+    write($vcard);
+    writeStats();
+}
+
+echo str_repeat("\n", count($stats)), "\nDone.\n";
--- a/vendor/sabre/vobject/bin/rrulebench.php
+++ b/vendor/sabre/vobject/bin/rrulebench.php
@@ -0,0 +1,32 @@
+<?php
+
+include __DIR__.'/../vendor/autoload.php';
+
+if ($argc < 4) {
+    echo 'sabre/vobject ', Sabre\VObject\Version::VERSION, " RRULE benchmark\n";
+    echo "\n";
+    echo "This script can be used to measure the speed of the 'recurrence expansion'\n";
+    echo 'system.';
+    echo "\n";
+    echo 'Usage: '.$argv[0]." inputfile.ics startdate enddate\n";
+    exit();
+}
+
+list(, $inputFile, $startDate, $endDate) = $argv;
+
+$bench = new Hoa\Bench\Bench();
+$bench->parse->start();
+
+echo "Parsing.\n";
+$vobj = Sabre\VObject\Reader::read(fopen($inputFile, 'r'));
+
+$bench->parse->stop();
+
+echo "Expanding.\n";
+$bench->expand->start();
+
+$vobj->expand(new DateTime($startDate), new DateTime($endDate));
+
+$bench->expand->stop();
+
+echo $bench,"\n";
--- a/vendor/sabre/vobject/bin/vobject
+++ b/vendor/sabre/vobject/bin/vobject
@@ -0,0 +1,27 @@
+#!/usr/bin/env php
+<?php
+
+namespace Sabre\VObject;
+
+// This sucks.. we have to try to find the composer autoloader. But chances
+// are, we can't find it this way. So we'll do our bestest
+$paths = [
+    __DIR__ . '/../vendor/autoload.php',  // In case vobject is cloned directly
+    __DIR__ . '/../../../autoload.php',   // In case vobject is a composer dependency.
+];
+
+foreach($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+if (!class_exists('Sabre\\VObject\\Version')) {
+    fwrite(STDERR, "Composer autoloader could not be loaded.\n");
+    die(1);
+}
+
+$cli = new Cli();
+exit($cli->main($argv));
+
--- a/vendor/sabre/vobject/composer.json
+++ b/vendor/sabre/vobject/composer.json
@@ -0,0 +1,107 @@
+{
+    "name": "sabre/vobject",
+    "description" : "The VObject library for PHP allows you to easily parse and manipulate iCalendar and vCard objects",
+    "keywords" : [
+        "iCalendar",
+        "iCal",
+        "vCalendar",
+        "vCard",
+        "jCard",
+        "jCal",
+        "ics",
+        "vcf",
+        "xCard",
+        "xCal",
+        "freebusy",
+        "recurrence",
+        "availability",
+        "rfc2425",
+        "rfc2426",
+        "rfc2739",
+        "rfc4770",
+        "rfc5545",
+        "rfc5546",
+        "rfc6321",
+        "rfc6350",
+        "rfc6351",
+        "rfc6474",
+        "rfc6638",
+        "rfc6715",
+        "rfc6868"
+    ],
+    "homepage" : "http://sabre.io/vobject/",
+    "license" : "BSD-3-Clause",
+    "require" : {
+        "php"          : "^7.1 || ^8.0",
+        "ext-mbstring" : "*",
+        "sabre/xml"    : "^2.1 || ^3.0 || ^4.0"
+    },
+    "require-dev" : {
+        "friendsofphp/php-cs-fixer": "~2.17.1",
+        "phpunit/phpunit" : "^7.5 || ^8.5 || ^9.6",
+        "phpunit/php-invoker" : "^2.0 || ^3.1",
+        "phpstan/phpstan": "^0.12 || ^1.12 || ^2.0"
+    },
+    "suggest" : {
+        "hoa/bench"       : "If you would like to run the benchmark scripts"
+    },
+    "authors" : [
+        {
+            "name" : "Evert Pot",
+            "email" : "me@evertpot.com",
+            "homepage" : "http://evertpot.com/",
+            "role" : "Developer"
+        },
+        {
+            "name" : "Dominik Tobschall",
+            "email" : "dominik@fruux.com",
+            "homepage" : "http://tobschall.de/",
+            "role" : "Developer"
+        },
+        {
+            "name" : "Ivan Enderlin",
+            "email" : "ivan.enderlin@hoa-project.net",
+            "homepage" : "http://mnt.io/",
+            "role" : "Developer"
+        }
+    ],
+    "support" : {
+        "forum" : "https://groups.google.com/group/sabredav-discuss",
+        "source" : "https://github.com/fruux/sabre-vobject"
+    },
+    "autoload" : {
+        "psr-4" : {
+            "Sabre\\VObject\\" : "lib/"
+        }
+    },
+    "autoload-dev" : {
+        "psr-4" : {
+            "Sabre\\VObject\\" : "tests/VObject"
+        }
+    },
+    "bin" : [
+        "bin/vobject",
+        "bin/generate_vcards"
+    ],
+    "extra" : {
+        "branch-alias" : {
+            "dev-master" : "4.0.x-dev"
+        }
+    },
+    "scripts": {
+        "phpstan": [
+            "phpstan analyse lib tests"
+        ],
+        "cs-fixer": [
+            "php-cs-fixer fix"
+        ],
+        "phpunit": [
+            "phpunit --configuration tests/phpunit.xml"
+        ],
+        "test": [
+            "composer phpstan",
+            "composer cs-fixer",
+            "composer phpunit"
+        ]
+    }
+}
--- a/vendor/sabre/vobject/lib/BirthdayCalendarGenerator.php
+++ b/vendor/sabre/vobject/lib/BirthdayCalendarGenerator.php
@@ -0,0 +1,172 @@
+<?php
+
+namespace Sabre\VObject;
+
+use Sabre\VObject\Component\VCalendar;
+
+/**
+ * This class generates birthday calendars.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Dominik Tobschall (http://tobschall.de/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class BirthdayCalendarGenerator
+{
+    /**
+     * Input objects.
+     *
+     * @var array
+     */
+    protected $objects = [];
+
+    /**
+     * Default year.
+     * Used for dates without a year.
+     */
+    const DEFAULT_YEAR = 2000;
+
+    /**
+     * Output format for the SUMMARY.
+     *
+     * @var string
+     */
+    protected $format = '%1$s\'s Birthday';
+
+    /**
+     * Creates the generator.
+     *
+     * Check the setTimeRange and setObjects methods for details about the
+     * arguments.
+     *
+     * @param mixed $objects
+     */
+    public function __construct($objects = null)
+    {
+        if ($objects) {
+            $this->setObjects($objects);
+        }
+    }
+
+    /**
+     * Sets the input objects.
+     *
+     * You must either supply a vCard as a string or as a Component/VCard object.
+     * It's also possible to supply an array of strings or objects.
+     *
+     * @param mixed $objects
+     */
+    public function setObjects($objects)
+    {
+        if (!is_array($objects)) {
+            $objects = [$objects];
+        }
+
+        $this->objects = [];
+        foreach ($objects as $object) {
+            if (is_string($object)) {
+                $vObj = Reader::read($object);
+                if (!$vObj instanceof Component\VCard) {
+                    throw new \InvalidArgumentException('String could not be parsed as \\Sabre\\VObject\\Component\\VCard by setObjects');
+                }
+
+                $this->objects[] = $vObj;
+            } elseif ($object instanceof Component\VCard) {
+                $this->objects[] = $object;
+            } else {
+                throw new \InvalidArgumentException('You can only pass strings or \\Sabre\\VObject\\Component\\VCard arguments to setObjects');
+            }
+        }
+    }
+
+    /**
+     * Sets the output format for the SUMMARY.
+     *
+     * @param string $format
+     */
+    public function setFormat($format)
+    {
+        $this->format = $format;
+    }
+
+    /**
+     * Parses the input data and returns a VCALENDAR.
+     *
+     * @return Component/VCalendar
+     */
+    public function getResult()
+    {
+        $calendar = new VCalendar();
+
+        foreach ($this->objects as $object) {
+            // Skip if there is no BDAY property.
+            if (!$object->select('BDAY')) {
+                continue;
+            }
+
+            // We've seen clients (ez-vcard) putting "BDAY:" properties
+            // without a value into vCards. If we come across those, we'll
+            // skip them.
+            if (empty($object->BDAY->getValue())) {
+                continue;
+            }
+
+            // We're always converting to vCard 4.0 so we can rely on the
+            // VCardConverter handling the X-APPLE-OMIT-YEAR property for us.
+            $object = $object->convert(Document::VCARD40);
+
+            // Skip if the card has no FN property.
+            if (!isset($object->FN)) {
+                continue;
+            }
+
+            // Skip if the BDAY property is not of the right type.
+            if (!$object->BDAY instanceof Property\VCard\DateAndOrTime) {
+                continue;
+            }
+
+            // Skip if we can't parse the BDAY value.
+            try {
+                $dateParts = DateTimeParser::parseVCardDateTime($object->BDAY->getValue());
+            } catch (InvalidDataException $e) {
+                continue;
+            }
+
+            // Set a year if it's not set.
+            $unknownYear = false;
+
+            if (!$dateParts['year']) {
+                $object->BDAY = self::DEFAULT_YEAR.'-'.$dateParts['month'].'-'.$dateParts['date'];
+
+                $unknownYear = true;
+            }
+
+            // Create event.
+            $event = $calendar->add('VEVENT', [
+                'SUMMARY' => sprintf($this->format, $object->FN->getValue()),
+                'DTSTART' => new \DateTime($object->BDAY->getValue()),
+                'RRULE' => 'FREQ=YEARLY',
+                'TRANSP' => 'TRANSPARENT',
+            ]);
+
+            // add VALUE=date
+            $event->DTSTART['VALUE'] = 'DATE';
+
+            // Add X-SABRE-BDAY property.
+            if ($unknownYear) {
+                $event->add('X-SABRE-BDAY', 'BDAY', [
+                    'X-SABRE-VCARD-UID' => $object->UID->getValue(),
+                    'X-SABRE-VCARD-FN' => $object->FN->getValue(),
+                    'X-SABRE-OMIT-YEAR' => self::DEFAULT_YEAR,
+                ]);
+            } else {
+                $event->add('X-SABRE-BDAY', 'BDAY', [
+                    'X-SABRE-VCARD-UID' => $object->UID->getValue(),
+                    'X-SABRE-VCARD-FN' => $object->FN->getValue(),
+                ]);
+            }
+        }
+
+        return $calendar;
+    }
+}
--- a/vendor/sabre/vobject/lib/Cli.php
+++ b/vendor/sabre/vobject/lib/Cli.php
@@ -0,0 +1,705 @@
+<?php
+
+namespace Sabre\VObject;
+
+use InvalidArgumentException;
+
+/**
+ * This is the CLI interface for sabre-vobject.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Cli
+{
+    /**
+     * No output.
+     *
+     * @var bool
+     */
+    protected $quiet = false;
+
+    /**
+     * Help display.
+     *
+     * @var bool
+     */
+    protected $showHelp = false;
+
+    /**
+     * Whether to spit out 'mimedir' or 'json' format.
+     *
+     * @var string
+     */
+    protected $format;
+
+    /**
+     * JSON pretty print.
+     *
+     * @var bool
+     */
+    protected $pretty;
+
+    /**
+     * Source file.
+     *
+     * @var string
+     */
+    protected $inputPath;
+
+    /**
+     * Destination file.
+     *
+     * @var string
+     */
+    protected $outputPath;
+
+    /**
+     * output stream.
+     *
+     * @var resource
+     */
+    protected $stdout;
+
+    /**
+     * stdin.
+     *
+     * @var resource
+     */
+    protected $stdin;
+
+    /**
+     * stderr.
+     *
+     * @var resource
+     */
+    protected $stderr;
+
+    /**
+     * Input format (one of json or mimedir).
+     *
+     * @var string
+     */
+    protected $inputFormat;
+
+    /**
+     * Makes the parser less strict.
+     *
+     * @var bool
+     */
+    protected $forgiving = false;
+
+    /**
+     * Main function.
+     *
+     * @return int
+     */
+    public function main(array $argv)
+    {
+        // @codeCoverageIgnoreStart
+        // We cannot easily test this, so we'll skip it. Pretty basic anyway.
+
+        if (!$this->stderr) {
+            $this->stderr = fopen('php://stderr', 'w');
+        }
+        if (!$this->stdout) {
+            $this->stdout = fopen('php://stdout', 'w');
+        }
+        if (!$this->stdin) {
+            $this->stdin = fopen('php://stdin', 'r');
+        }
+
+        // @codeCoverageIgnoreEnd
+
+        try {
+            list($options, $positional) = $this->parseArguments($argv);
+
+            if (isset($options['q'])) {
+                $this->quiet = true;
+            }
+            $this->log($this->colorize('green', 'sabre/vobject ').$this->colorize('yellow', Version::VERSION));
+
+            foreach ($options as $name => $value) {
+                switch ($name) {
+                    case 'q':
+                        // Already handled earlier.
+                        break;
+                    case 'h':
+                    case 'help':
+                        $this->showHelp();
+
+                        return 0;
+                        break;
+                    case 'format':
+                        switch ($value) {
+                            // jcard/jcal documents
+                            case 'jcard':
+                            case 'jcal':
+                            // specific document versions
+                            case 'vcard21':
+                            case 'vcard30':
+                            case 'vcard40':
+                            case 'icalendar20':
+                            // specific formats
+                            case 'json':
+                            case 'mimedir':
+                            // icalendar/vcad
+                            case 'icalendar':
+                            case 'vcard':
+                                $this->format = $value;
+                                break;
+
+                            default:
+                                throw new InvalidArgumentException('Unknown format: '.$value);
+                        }
+                        break;
+                    case 'pretty':
+                        if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
+                            $this->pretty = true;
+                        }
+                        break;
+                    case 'forgiving':
+                        $this->forgiving = true;
+                        break;
+                    case 'inputformat':
+                        switch ($value) {
+                            // json formats
+                            case 'jcard':
+                            case 'jcal':
+                            case 'json':
+                                $this->inputFormat = 'json';
+                                break;
+
+                            // mimedir formats
+                            case 'mimedir':
+                            case 'icalendar':
+                            case 'vcard':
+                            case 'vcard21':
+                            case 'vcard30':
+                            case 'vcard40':
+                            case 'icalendar20':
+                                $this->inputFormat = 'mimedir';
+                                break;
+
+                            default:
+                                throw new InvalidArgumentException('Unknown format: '.$value);
+                        }
+                        break;
+                    default:
+                        throw new InvalidArgumentException('Unknown option: '.$name);
+                }
+            }
+
+            if (0 === count($positional)) {
+                $this->showHelp();
+
+                return 1;
+            }
+
+            if (1 === count($positional)) {
+                throw new InvalidArgumentException('Inputfile is a required argument');
+            }
+
+            if (count($positional) > 3) {
+                throw new InvalidArgumentException('Too many arguments');
+            }
+
+            if (!in_array($positional[0], ['validate', 'repair', 'convert', 'color'])) {
+                throw new InvalidArgumentException('Unknown command: '.$positional[0]);
+            }
+        } catch (InvalidArgumentException $e) {
+            $this->showHelp();
+            $this->log('Error: '.$e->getMessage(), 'red');
+
+            return 1;
+        }
+
+        $command = $positional[0];
+
+        $this->inputPath = $positional[1];
+        $this->outputPath = isset($positional[2]) ? $positional[2] : '-';
+
+        if ('-' !== $this->outputPath) {
+            $this->stdout = fopen($this->outputPath, 'w');
+        }
+
+        if (!$this->inputFormat) {
+            if ('.json' === substr($this->inputPath, -5)) {
+                $this->inputFormat = 'json';
+            } else {
+                $this->inputFormat = 'mimedir';
+            }
+        }
+        if (!$this->format) {
+            if ('.json' === substr($this->outputPath, -5)) {
+                $this->format = 'json';
+            } else {
+                $this->format = 'mimedir';
+            }
+        }
+
+        $realCode = 0;
+
+        try {
+            while ($input = $this->readInput()) {
+                $returnCode = $this->$command($input);
+                if (0 !== $returnCode) {
+                    $realCode = $returnCode;
+                }
+            }
+        } catch (EofException $e) {
+            // end of file
+        } catch (\Exception $e) {
+            $this->log('Error: '.$e->getMessage(), 'red');
+
+            return 2;
+        }
+
+        return $realCode;
+    }
+
+    /**
+     * Shows the help message.
+     */
+    protected function showHelp()
+    {
+        $this->log('Usage:', 'yellow');
+        $this->log('  vobject [options] command [arguments]');
+        $this->log('');
+        $this->log('Options:', 'yellow');
+        $this->log($this->colorize('green', '  -q            ')."Don't output anything.");
+        $this->log($this->colorize('green', '  -help -h      ').'Display this help message.');
+        $this->log($this->colorize('green', '  --format      ').'Convert to a specific format. Must be one of: vcard, vcard21,');
+        $this->log($this->colorize('green', '  --forgiving   ').'Makes the parser less strict.');
+        $this->log('                vcard30, vcard40, icalendar20, jcal, jcard, json, mimedir.');
+        $this->log($this->colorize('green', '  --inputformat ').'If the input format cannot be guessed from the extension, it');
+        $this->log('                must be specified here.');
+        // Only PHP 5.4 and up
+        if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
+            $this->log($this->colorize('green', '  --pretty      ').'json pretty-print.');
+        }
+        $this->log('');
+        $this->log('Commands:', 'yellow');
+        $this->log($this->colorize('green', '  validate').' source_file              Validates a file for correctness.');
+        $this->log($this->colorize('green', '  repair').' source_file [output_file]  Repairs a file.');
+        $this->log($this->colorize('green', '  convert').' source_file [output_file] Converts a file.');
+        $this->log($this->colorize('green', '  color').' source_file                 Colorize a file, useful for debugging.');
+        $this->log(
+        <<<HELP
+
+If source_file is set as '-', STDIN will be used.
+If output_file is omitted, STDOUT will be used.
+All other output is sent to STDERR.
+
+HELP
+        );
+
+        $this->log('Examples:', 'yellow');
+        $this->log('   vobject convert contact.vcf contact.json');
+        $this->log('   vobject convert --format=vcard40 old.vcf new.vcf');
+        $this->log('   vobject convert --inputformat=json --format=mimedir - -');
+        $this->log('   vobject color calendar.ics');
+        $this->log('');
+        $this->log('https://github.com/fruux/sabre-vobject', 'purple');
+    }
+
+    /**
+     * Validates a VObject file.
+     *
+     * @return int
+     */
+    protected function validate(Component $vObj)
+    {
+        $returnCode = 0;
+
+        switch ($vObj->name) {
+            case 'VCALENDAR':
+                $this->log('iCalendar: '.(string) $vObj->VERSION);
+                break;
+            case 'VCARD':
+                $this->log('vCard: '.(string) $vObj->VERSION);
+                break;
+        }
+
+        $warnings = $vObj->validate();
+        if (!count($warnings)) {
+            $this->log('  No warnings!');
+        } else {
+            $levels = [
+                1 => 'REPAIRED',
+                2 => 'WARNING',
+                3 => 'ERROR',
+            ];
+            $returnCode = 2;
+            foreach ($warnings as $warn) {
+                $extra = '';
+                if ($warn['node'] instanceof Property) {
+                    $extra = ' (property: "'.$warn['node']->name.'")';
+                }
+                $this->log('  ['.$levels[$warn['level']].'] '.$warn['message'].$extra);
+            }
+        }
+
+        return $returnCode;
+    }
+
+    /**
+     * Repairs a VObject file.
+     *
+     * @return int
+     */
+    protected function repair(Component $vObj)
+    {
+        $returnCode = 0;
+
+        switch ($vObj->name) {
+            case 'VCALENDAR':
+                $this->log('iCalendar: '.(string) $vObj->VERSION);
+                break;
+            case 'VCARD':
+                $this->log('vCard: '.(string) $vObj->VERSION);
+                break;
+        }
+
+        $warnings = $vObj->validate(Node::REPAIR);
+        if (!count($warnings)) {
+            $this->log('  No warnings!');
+        } else {
+            $levels = [
+                1 => 'REPAIRED',
+                2 => 'WARNING',
+                3 => 'ERROR',
+            ];
+            $returnCode = 2;
+            foreach ($warnings as $warn) {
+                $extra = '';
+                if ($warn['node'] instanceof Property) {
+                    $extra = ' (property: "'.$warn['node']->name.'")';
+                }
+                $this->log('  ['.$levels[$warn['level']].'] '.$warn['message'].$extra);
+            }
+        }
+        fwrite($this->stdout, $vObj->serialize());
+
+        return $returnCode;
+    }
+
+    /**
+     * Converts a vObject file to a new format.
+     *
+     * @param Component $vObj
+     *
+     * @return int
+     */
+    protected function convert($vObj)
+    {
+        $json = false;
+        $convertVersion = null;
+        $forceInput = null;
+
+        switch ($this->format) {
+            case 'json':
+                $json = true;
+                if ('VCARD' === $vObj->name) {
+                    $convertVersion = Document::VCARD40;
+                }
+                break;
+            case 'jcard':
+                $json = true;
+                $forceInput = 'VCARD';
+                $convertVersion = Document::VCARD40;
+                break;
+            case 'jcal':
+                $json = true;
+                $forceInput = 'VCALENDAR';
+                break;
+            case 'mimedir':
+            case 'icalendar':
+            case 'icalendar20':
+            case 'vcard':
+                break;
+            case 'vcard21':
+                $convertVersion = Document::VCARD21;
+                break;
+            case 'vcard30':
+                $convertVersion = Document::VCARD30;
+                break;
+            case 'vcard40':
+                $convertVersion = Document::VCARD40;
+                break;
+        }
+
+        if ($forceInput && $vObj->name !== $forceInput) {
+            throw new \Exception('You cannot convert a '.strtolower($vObj->name).' to '.$this->format);
+        }
+        if ($convertVersion) {
+            $vObj = $vObj->convert($convertVersion);
+        }
+        if ($json) {
+            $jsonOptions = 0;
+            if ($this->pretty) {
+                $jsonOptions = JSON_PRETTY_PRINT;
+            }
+            fwrite($this->stdout, json_encode($vObj->jsonSerialize(), $jsonOptions));
+        } else {
+            fwrite($this->stdout, $vObj->serialize());
+        }
+
+        return 0;
+    }
+
+    /**
+     * Colorizes a file.
+     *
+     * @param Component $vObj
+     */
+    protected function color($vObj)
+    {
+        $this->serializeComponent($vObj);
+    }
+
+    /**
+     * Returns an ansi color string for a color name.
+     *
+     * @param string $color
+     *
+     * @return string
+     */
+    protected function colorize($color, $str, $resetTo = 'default')
+    {
+        $colors = [
+            'cyan' => '1;36',
+            'red' => '1;31',
+            'yellow' => '1;33',
+            'blue' => '0;34',
+            'green' => '0;32',
+            'default' => '0',
+            'purple' => '0;35',
+        ];
+
+        return "\033[".$colors[$color].'m'.$str."\033[".$colors[$resetTo].'m';
+    }
+
+    /**
+     * Writes out a string in specific color.
+     *
+     * @param string $color
+     * @param string $str
+     */
+    protected function cWrite($color, $str)
+    {
+        fwrite($this->stdout, $this->colorize($color, $str));
+    }
+
+    protected function serializeComponent(Component $vObj)
+    {
+        $this->cWrite('cyan', 'BEGIN');
+        $this->cWrite('red', ':');
+        $this->cWrite('yellow', $vObj->name."\n");
+
+        /**
+         * Gives a component a 'score' for sorting purposes.
+         *
+         * This is solely used by the childrenSort method.
+         *
+         * A higher score means the item will be lower in the list.
+         * To avoid score collisions, each "score category" has a reasonable
+         * space to accommodate elements. The $key is added to the $score to
+         * preserve the original relative order of elements.
+         *
+         * @param int   $key
+         * @param array $array
+         *
+         * @return int
+         */
+        $sortScore = function ($key, $array) {
+            if ($array[$key] instanceof Component) {
+                // We want to encode VTIMEZONE first, this is a personal
+                // preference.
+                if ('VTIMEZONE' === $array[$key]->name) {
+                    $score = 300000000;
+
+                    return $score + $key;
+                } else {
+                    $score = 400000000;
+
+                    return $score + $key;
+                }
+            } else {
+                // Properties get encoded first
+                // VCARD version 4.0 wants the VERSION property to appear first
+                if ($array[$key] instanceof Property) {
+                    if ('VERSION' === $array[$key]->name) {
+                        $score = 100000000;
+
+                        return $score + $key;
+                    } else {
+                        // All other properties
+                        $score = 200000000;
+
+                        return $score + $key;
+                    }
+                }
+            }
+        };
+
+        $children = $vObj->children();
+        $tmp = $children;
+        uksort(
+            $children,
+            function ($a, $b) use ($sortScore, $tmp) {
+                $sA = $sortScore($a, $tmp);
+                $sB = $sortScore($b, $tmp);
+
+                return $sA - $sB;
+            }
+        );
+
+        foreach ($children as $child) {
+            if ($child instanceof Component) {
+                $this->serializeComponent($child);
+            } else {
+                $this->serializeProperty($child);
+            }
+        }
+
+        $this->cWrite('cyan', 'END');
+        $this->cWrite('red', ':');
+        $this->cWrite('yellow', $vObj->name."\n");
+    }
+
+    /**
+     * Colorizes a property.
+     */
+    protected function serializeProperty(Property $property)
+    {
+        if ($property->group) {
+            $this->cWrite('default', $property->group);
+            $this->cWrite('red', '.');
+        }
+
+        $this->cWrite('yellow', $property->name);
+
+        foreach ($property->parameters as $param) {
+            $this->cWrite('red', ';');
+            $this->cWrite('blue', $param->serialize());
+        }
+        $this->cWrite('red', ':');
+
+        if ($property instanceof Property\Binary) {
+            $this->cWrite('default', 'embedded binary stripped. ('.strlen($property->getValue()).' bytes)');
+        } else {
+            $parts = $property->getParts();
+            $first1 = true;
+            // Looping through property values
+            foreach ($parts as $part) {
+                if ($first1) {
+                    $first1 = false;
+                } else {
+                    $this->cWrite('red', $property->delimiter);
+                }
+                $first2 = true;
+                // Looping through property sub-values
+                foreach ((array) $part as $subPart) {
+                    if ($first2) {
+                        $first2 = false;
+                    } else {
+                        // The sub-value delimiter is always comma
+                        $this->cWrite('red', ',');
+                    }
+
+                    $subPart = strtr(
+                        $subPart,
+                        [
+                            '\\' => $this->colorize('purple', '\\\\', 'green'),
+                            ';' => $this->colorize('purple', '\;', 'green'),
+                            ',' => $this->colorize('purple', '\,', 'green'),
+                            "\n" => $this->colorize('purple', "\\n\n\t", 'green'),
+                            "\r" => '',
+                        ]
+                    );
+
+                    $this->cWrite('green', $subPart);
+                }
+            }
+        }
+        $this->cWrite('default', "\n");
+    }
+
+    /**
+     * Parses the list of arguments.
+     */
+    protected function parseArguments(array $argv)
+    {
+        $positional = [];
+        $options = [];
+
+        for ($ii = 0; $ii < count($argv); ++$ii) {
+            // Skipping the first argument.
+            if (0 === $ii) {
+                continue;
+            }
+
+            $v = $argv[$ii];
+
+            if ('--' === substr($v, 0, 2)) {
+                // This is a long-form option.
+                $optionName = substr($v, 2);
+                $optionValue = true;
+                if (strpos($optionName, '=')) {
+                    list($optionName, $optionValue) = explode('=', $optionName);
+                }
+                $options[$optionName] = $optionValue;
+            } elseif ('-' === substr($v, 0, 1) && strlen($v) > 1) {
+                // This is a short-form option.
+                foreach (str_split(substr($v, 1)) as $option) {
+                    $options[$option] = true;
+                }
+            } else {
+                $positional[] = $v;
+            }
+        }
+
+        return [$options, $positional];
+    }
+
+    protected $parser;
+
+    /**
+     * Reads the input file.
+     *
+     * @return Component
+     */
+    protected function readInput()
+    {
+        if (!$this->parser) {
+            if ('-' !== $this->inputPath) {
+                $this->stdin = fopen($this->inputPath, 'r');
+            }
+
+            if ('mimedir' === $this->inputFormat) {
+                $this->parser = new Parser\MimeDir($this->stdin, ($this->forgiving ? Reader::OPTION_FORGIVING : 0));
+            } else {
+                $this->parser = new Parser\Json($this->stdin, ($this->forgiving ? Reader::OPTION_FORGIVING : 0));
+            }
+        }
+
+        return $this->parser->parse();
+    }
+
+    /**
+     * Sends a message to STDERR.
+     *
+     * @param string $msg
+     */
+    protected function log($msg, $color = 'default')
+    {
+        if (!$this->quiet) {
+            if ('default' !== $color) {
+                $msg = $this->colorize($color, $msg);
+            }
+            fwrite($this->stderr, $msg."\n");
+        }
+    }
+}
--- a/vendor/sabre/vobject/lib/Component.php
+++ b/vendor/sabre/vobject/lib/Component.php
@@ -0,0 +1,672 @@
+<?php
+
+namespace Sabre\VObject;
+
+use Sabre\Xml;
+
+/**
+ * Component.
+ *
+ * A component represents a group of properties, such as VCALENDAR, VEVENT, or
+ * VCARD.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Component extends Node
+{
+    /**
+     * Component name.
+     *
+     * This will contain a string such as VEVENT, VTODO, VCALENDAR, VCARD.
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * A list of properties and/or sub-components.
+     *
+     * @var array<string, Component|Property>
+     */
+    protected $children = [];
+
+    /**
+     * Creates a new component.
+     *
+     * You can specify the children either in key=>value syntax, in which case
+     * properties will automatically be created, or you can just pass a list of
+     * Component and Property object.
+     *
+     * By default, a set of sensible values will be added to the component. For
+     * an iCalendar object, this may be something like CALSCALE:GREGORIAN. To
+     * ensure that this does not happen, set $defaults to false.
+     *
+     * @param string|null $name     such as VCALENDAR, VEVENT
+     * @param bool        $defaults
+     */
+    public function __construct(Document $root, $name, array $children = [], $defaults = true)
+    {
+        $this->name = isset($name) ? strtoupper($name) : '';
+        $this->root = $root;
+
+        if ($defaults) {
+            // This is a terribly convoluted way to do this, but this ensures
+            // that the order of properties as they are specified in both
+            // defaults and the childrens list, are inserted in the object in a
+            // natural way.
+            $list = $this->getDefaults();
+            $nodes = [];
+            foreach ($children as $key => $value) {
+                if ($value instanceof Node) {
+                    if (isset($list[$value->name])) {
+                        unset($list[$value->name]);
+                    }
+                    $nodes[] = $value;
+                } else {
+                    $list[$key] = $value;
+                }
+            }
+            foreach ($list as $key => $value) {
+                $this->add($key, $value);
+            }
+            foreach ($nodes as $node) {
+                $this->add($node);
+            }
+        } else {
+            foreach ($children as $k => $child) {
+                if ($child instanceof Node) {
+                    // Component or Property
+                    $this->add($child);
+                } else {
+                    // Property key=>value
+                    $this->add($k, $child);
+                }
+            }
+        }
+    }
+
+    /**
+     * Adds a new property or component, and returns the new item.
+     *
+     * This method has 3 possible signatures:
+     *
+     * add(Component $comp) // Adds a new component
+     * add(Property $prop)  // Adds a new property
+     * add($name, $value, array $parameters = []) // Adds a new property
+     * add($name, array $children = []) // Adds a new component
+     * by name.
+     *
+     * @return Node
+     */
+    public function add()
+    {
+        $arguments = func_get_args();
+
+        if ($arguments[0] instanceof Node) {
+            if (isset($arguments[1])) {
+                throw new \InvalidArgumentException('The second argument must not be specified, when passing a VObject Node');
+            }
+            $arguments[0]->parent = $this;
+            $newNode = $arguments[0];
+        } elseif (is_string($arguments[0])) {
+            $newNode = call_user_func_array([$this->root, 'create'], $arguments);
+        } else {
+            throw new \InvalidArgumentException('The first argument must either be a \\Sabre\\VObject\\Node or a string');
+        }
+
+        $name = $newNode->name;
+        if (isset($this->children[$name])) {
+            $this->children[$name][] = $newNode;
+        } else {
+            $this->children[$name] = [$newNode];
+        }
+
+        return $newNode;
+    }
+
+    /**
+     * This method removes a component or property from this component.
+     *
+     * You can either specify the item by name (like DTSTART), in which case
+     * all properties/components with that name will be removed, or you can
+     * pass an instance of a property or component, in which case only that
+     * exact item will be removed.
+     *
+     * @param string|Property|Component $item
+     */
+    public function remove($item)
+    {
+        if (is_string($item)) {
+            // If there's no dot in the name, it's an exact property name and
+            // we can just wipe out all those properties.
+            //
+            if (false === strpos($item, '.')) {
+                unset($this->children[strtoupper($item)]);
+
+                return;
+            }
+            // If there was a dot, we need to ask select() to help us out and
+            // then we just call remove recursively.
+            foreach ($this->select($item) as $child) {
+                $this->remove($child);
+            }
+        } else {
+            foreach ($this->select($item->name) as $k => $child) {
+                if ($child === $item) {
+                    unset($this->children[$item->name][$k]);
+
+                    return;
+                }
+            }
+
+            throw new \InvalidArgumentException('The item you passed to remove() was not a child of this component');
+        }
+    }
+
+    /**
+     * Returns a flat list of all the properties and components in this
+     * component.
+     *
+     * @return array
+     */
+    public function children()
+    {
+        $result = [];
+        foreach ($this->children as $childGroup) {
+            $result = array_merge($result, $childGroup);
+        }
+
+        return $result;
+    }
+
+    /**
+     * This method only returns a list of sub-components. Properties are
+     * ignored.
+     *
+     * @return array
+     */
+    public function getComponents()
+    {
+        $result = [];
+
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                if ($child instanceof self) {
+                    $result[] = $child;
+                }
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns an array with elements that match the specified name.
+     *
+     * This function is also aware of MIME-Directory groups (as they appear in
+     * vcards). This means that if a property is grouped as "HOME.EMAIL", it
+     * will also be returned when searching for just "EMAIL". If you want to
+     * search for a property in a specific group, you can select on the entire
+     * string ("HOME.EMAIL"). If you want to search on a specific property that
+     * has not been assigned a group, specify ".EMAIL".
+     *
+     * @param string $name
+     *
+     * @return array
+     */
+    public function select($name)
+    {
+        $group = null;
+        $name = strtoupper($name);
+        if (false !== strpos($name, '.')) {
+            list($group, $name) = explode('.', $name, 2);
+        }
+        if ('' === $name) {
+            $name = null;
+        }
+
+        if (!is_null($name)) {
+            $result = isset($this->children[$name]) ? $this->children[$name] : [];
+
+            if (is_null($group)) {
+                return $result;
+            } else {
+                // If we have a group filter as well, we need to narrow it down
+                // more.
+                return array_filter(
+                    $result,
+                    function ($child) use ($group) {
+                        return $child instanceof Property && (null !== $child->group ? strtoupper($child->group) : '') === $group;
+                    }
+                );
+            }
+        }
+
+        // If we got to this point, it means there was no 'name' specified for
+        // searching, implying that this is a group-only search.
+        $result = [];
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                if ($child instanceof Property && (null !== $child->group ? strtoupper($child->group) : '') === $group) {
+                    $result[] = $child;
+                }
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Turns the object back into a serialized blob.
+     *
+     * @return string
+     */
+    public function serialize()
+    {
+        $str = 'BEGIN:'.$this->name."\r\n";
+
+        /**
+         * Gives a component a 'score' for sorting purposes.
+         *
+         * This is solely used by the childrenSort method.
+         *
+         * A higher score means the item will be lower in the list.
+         * To avoid score collisions, each "score category" has a reasonable
+         * space to accommodate elements. The $key is added to the $score to
+         * preserve the original relative order of elements.
+         *
+         * @param int   $key
+         * @param array $array
+         *
+         * @return int
+         */
+        $sortScore = function ($key, $array) {
+            if ($array[$key] instanceof Component) {
+                // We want to encode VTIMEZONE first, this is a personal
+                // preference.
+                if ('VTIMEZONE' === $array[$key]->name) {
+                    $score = 300000000;
+
+                    return $score + $key;
+                } else {
+                    $score = 400000000;
+
+                    return $score + $key;
+                }
+            } else {
+                // Properties get encoded first
+                // VCARD version 4.0 wants the VERSION property to appear first
+                if ($array[$key] instanceof Property) {
+                    if ('VERSION' === $array[$key]->name) {
+                        $score = 100000000;
+
+                        return $score + $key;
+                    } else {
+                        // All other properties
+                        $score = 200000000;
+
+                        return $score + $key;
+                    }
+                }
+            }
+        };
+
+        $children = $this->children();
+        $tmp = $children;
+        uksort(
+            $children,
+            function ($a, $b) use ($sortScore, $tmp) {
+                $sA = $sortScore($a, $tmp);
+                $sB = $sortScore($b, $tmp);
+
+                return $sA - $sB;
+            }
+        );
+
+        foreach ($children as $child) {
+            $str .= $child->serialize();
+        }
+        $str .= 'END:'.$this->name."\r\n";
+
+        return $str;
+    }
+
+    /**
+     * This method returns an array, with the representation as it should be
+     * encoded in JSON. This is used to create jCard or jCal documents.
+     *
+     * @return array
+     */
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize()
+    {
+        $components = [];
+        $properties = [];
+
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                if ($child instanceof self) {
+                    $components[] = $child->jsonSerialize();
+                } else {
+                    $properties[] = $child->jsonSerialize();
+                }
+            }
+        }
+
+        return [
+            strtolower($this->name),
+            $properties,
+            $components,
+        ];
+    }
+
+    /**
+     * This method serializes the data into XML. This is used to create xCard or
+     * xCal documents.
+     *
+     * @param Xml\Writer $writer XML writer
+     */
+    public function xmlSerialize(Xml\Writer $writer): void
+    {
+        $components = [];
+        $properties = [];
+
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                if ($child instanceof self) {
+                    $components[] = $child;
+                } else {
+                    $properties[] = $child;
+                }
+            }
+        }
+
+        $writer->startElement(strtolower($this->name));
+
+        if (!empty($properties)) {
+            $writer->startElement('properties');
+
+            foreach ($properties as $property) {
+                $property->xmlSerialize($writer);
+            }
+
+            $writer->endElement();
+        }
+
+        if (!empty($components)) {
+            $writer->startElement('components');
+
+            foreach ($components as $component) {
+                $component->xmlSerialize($writer);
+            }
+
+            $writer->endElement();
+        }
+
+        $writer->endElement();
+    }
+
+    /**
+     * This method should return a list of default property values.
+     *
+     * @return array
+     */
+    protected function getDefaults()
+    {
+        return [];
+    }
+
+    /* Magic property accessors {{{ */
+
+    /**
+     * Using 'get' you will either get a property or component.
+     *
+     * If there were no child-elements found with the specified name,
+     * null is returned.
+     *
+     * To use this, this may look something like this:
+     *
+     * $event = $calendar->VEVENT;
+     *
+     * @param string $name
+     *
+     * @return Property|null
+     */
+    public function __get($name)
+    {
+        if ('children' === $name) {
+            throw new \RuntimeException('Starting sabre/vobject 4.0 the children property is now protected. You should use the children() method instead');
+        }
+
+        $matches = $this->select($name);
+        if (0 === count($matches)) {
+            return;
+        } else {
+            $firstMatch = current($matches);
+            /* @var $firstMatch Property */
+            $firstMatch->setIterator(new ElementList(array_values($matches)));
+
+            return $firstMatch;
+        }
+    }
+
+    /**
+     * This method checks if a sub-element with the specified name exists.
+     *
+     * @param string $name
+     *
+     * @return bool
+     */
+    public function __isset($name)
+    {
+        $matches = $this->select($name);
+
+        return count($matches) > 0;
+    }
+
+    /**
+     * Using the setter method you can add properties or subcomponents.
+     *
+     * You can either pass a Component, Property
+     * object, or a string to automatically create a Property.
+     *
+     * If the item already exists, it will be removed. If you want to add
+     * a new item with the same name, always use the add() method.
+     *
+     * @param string $name
+     * @param mixed  $value
+     */
+    public function __set($name, $value)
+    {
+        $name = strtoupper($name);
+        $this->remove($name);
+        if ($value instanceof self || $value instanceof Property) {
+            $this->add($value);
+        } else {
+            $this->add($name, $value);
+        }
+    }
+
+    /**
+     * Removes all properties and components within this component with the
+     * specified name.
+     *
+     * @param string $name
+     */
+    public function __unset($name)
+    {
+        $this->remove($name);
+    }
+
+    /* }}} */
+
+    /**
+     * This method is automatically called when the object is cloned.
+     * Specifically, this will ensure all child elements are also cloned.
+     */
+    public function __clone()
+    {
+        foreach ($this->children as $childName => $childGroup) {
+            foreach ($childGroup as $key => $child) {
+                $clonedChild = clone $child;
+                $clonedChild->parent = $this;
+                $clonedChild->root = $this->root;
+                $this->children[$childName][$key] = $clonedChild;
+            }
+        }
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * It is also possible to specify defaults and severity levels for
+     * violating the rule.
+     *
+     * See the VEVENT implementation for getValidationRules for a more complex
+     * example.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [];
+    }
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *   Node::PROFILE_CARDDAV - Validate the vCard for CardDAV purposes.
+     *   Node::PROFILE_CALDAV - Validate the iCalendar for CalDAV purposes.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on).
+     *   2 - A warning.
+     *   3 - An error.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        $rules = $this->getValidationRules();
+        $defaults = $this->getDefaults();
+
+        $propertyCounters = [];
+
+        $messages = [];
+
+        foreach ($this->children() as $child) {
+            $name = strtoupper($child->name);
+            if (!isset($propertyCounters[$name])) {
+                $propertyCounters[$name] = 1;
+            } else {
+                ++$propertyCounters[$name];
+            }
+            $messages = array_merge($messages, $child->validate($options));
+        }
+
+        foreach ($rules as $propName => $rule) {
+            switch ($rule) {
+                case '0':
+                    if (isset($propertyCounters[$propName])) {
+                        $messages[] = [
+                            'level' => 3,
+                            'message' => $propName.' MUST NOT appear in a '.$this->name.' component',
+                            'node' => $this,
+                        ];
+                    }
+                    break;
+                case '1':
+                    if (!isset($propertyCounters[$propName]) || 1 !== $propertyCounters[$propName]) {
+                        $repaired = false;
+                        if ($options & self::REPAIR && isset($defaults[$propName])) {
+                            $this->add($propName, $defaults[$propName]);
+                            $repaired = true;
+                        }
+                        $messages[] = [
+                            'level' => $repaired ? 1 : 3,
+                            'message' => $propName.' MUST appear exactly once in a '.$this->name.' component',
+                            'node' => $this,
+                        ];
+                    }
+                    break;
+                case '+':
+                    if (!isset($propertyCounters[$propName]) || $propertyCounters[$propName] < 1) {
+                        $messages[] = [
+                            'level' => 3,
+                            'message' => $propName.' MUST appear at least once in a '.$this->name.' component',
+                            'node' => $this,
+                        ];
+                    }
+                    break;
+                case '*':
+                    break;
+                case '?':
+                    if (isset($propertyCounters[$propName]) && $propertyCounters[$propName] > 1) {
+                        $level = 3;
+
+                        // We try to repair the same property appearing multiple times with the exact same value
+                        // by removing the duplicates and keeping only one property
+                        if ($options & self::REPAIR) {
+                            $properties = array_unique($this->select($propName), SORT_REGULAR);
+
+                            if (1 === count($properties)) {
+                                $this->remove($propName);
+                                $this->add($properties[0]);
+
+                                $level = 1;
+                            }
+                        }
+
+                        $messages[] = [
+                            'level' => $level,
+                            'message' => $propName.' MUST NOT appear more than once in a '.$this->name.' component',
+                            'node' => $this,
+                        ];
+                    }
+                    break;
+            }
+        }
+
+        return $messages;
+    }
+
+    /**
+     * Call this method on a document if you're done using it.
+     *
+     * It's intended to remove all circular references, so PHP can easily clean
+     * it up.
+     */
+    public function destroy()
+    {
+        parent::destroy();
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                $child->destroy();
+            }
+        }
+        $this->children = [];
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/Available.php
+++ b/vendor/sabre/vobject/lib/Component/Available.php
@@ -0,0 +1,123 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use Sabre\VObject;
+
+/**
+ * The Available sub-component.
+ *
+ * This component adds functionality to a component, specific for AVAILABLE
+ * components.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Ivan Enderlin
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Available extends VObject\Component
+{
+    /**
+     * Returns the 'effective start' and 'effective end' of this VAVAILABILITY
+     * component.
+     *
+     * We use the DTSTART and DTEND or DURATION to determine this.
+     *
+     * The returned value is an array containing DateTimeImmutable instances.
+     * If either the start or end is 'unbounded' its value will be null
+     * instead.
+     *
+     * @return array
+     */
+    public function getEffectiveStartEnd()
+    {
+        $effectiveStart = $this->DTSTART->getDateTime();
+        if (isset($this->DTEND)) {
+            $effectiveEnd = $this->DTEND->getDateTime();
+        } else {
+            $effectiveEnd = $effectiveStart->add(VObject\DateTimeParser::parseDuration($this->DURATION));
+        }
+
+        return [$effectiveStart, $effectiveEnd];
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'UID' => 1,
+            'DTSTART' => 1,
+            'DTSTAMP' => 1,
+
+            'DTEND' => '?',
+            'DURATION' => '?',
+
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'LAST-MODIFIED' => '?',
+            'RECURRENCE-ID' => '?',
+            'RRULE' => '?',
+            'SUMMARY' => '?',
+
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'EXDATE' => '*',
+            'RDATE' => '*',
+
+            'AVAILABLE' => '*',
+        ];
+    }
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *   Node::PROFILE_CARDDAV - Validate the vCard for CardDAV purposes.
+     *   Node::PROFILE_CALDAV - Validate the iCalendar for CalDAV purposes.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on).
+     *   2 - A warning.
+     *   3 - An error.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        $result = parent::validate($options);
+
+        if (isset($this->DTEND) && isset($this->DURATION)) {
+            $result[] = [
+                'level' => 3,
+                'message' => 'DTEND and DURATION cannot both be present',
+                'node' => $this,
+            ];
+        }
+
+        return $result;
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VAlarm.php
+++ b/vendor/sabre/vobject/lib/Component/VAlarm.php
@@ -0,0 +1,138 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeImmutable;
+use DateTimeInterface;
+use Sabre\VObject;
+use Sabre\VObject\InvalidDataException;
+
+/**
+ * VAlarm component.
+ *
+ * This component contains some additional functionality specific for VALARMs.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VAlarm extends VObject\Component
+{
+    /**
+     * Returns a DateTime object when this alarm is going to trigger.
+     *
+     * This ignores repeated alarm, only the first trigger is returned.
+     *
+     * @return DateTimeImmutable
+     */
+    public function getEffectiveTriggerTime()
+    {
+        $trigger = $this->TRIGGER;
+        if (!isset($trigger['VALUE']) || 'DURATION' === strtoupper($trigger['VALUE'])) {
+            $triggerDuration = VObject\DateTimeParser::parseDuration($this->TRIGGER);
+            $related = (isset($trigger['RELATED']) && 'END' == strtoupper($trigger['RELATED'])) ? 'END' : 'START';
+
+            $parentComponent = $this->parent;
+            if ('START' === $related) {
+                if ('VTODO' === $parentComponent->name) {
+                    $propName = 'DUE';
+                } else {
+                    $propName = 'DTSTART';
+                }
+
+                $effectiveTrigger = $parentComponent->$propName->getDateTime();
+                $effectiveTrigger = $effectiveTrigger->add($triggerDuration);
+            } else {
+                if ('VTODO' === $parentComponent->name) {
+                    $endProp = 'DUE';
+                } elseif ('VEVENT' === $parentComponent->name) {
+                    $endProp = 'DTEND';
+                } else {
+                    throw new InvalidDataException('time-range filters on VALARM components are only supported when they are a child of VTODO or VEVENT');
+                }
+
+                if (isset($parentComponent->$endProp)) {
+                    $effectiveTrigger = $parentComponent->$endProp->getDateTime();
+                    $effectiveTrigger = $effectiveTrigger->add($triggerDuration);
+                } elseif (isset($parentComponent->DURATION)) {
+                    $effectiveTrigger = $parentComponent->DTSTART->getDateTime();
+                    $duration = VObject\DateTimeParser::parseDuration($parentComponent->DURATION);
+                    $effectiveTrigger = $effectiveTrigger->add($duration);
+                    $effectiveTrigger = $effectiveTrigger->add($triggerDuration);
+                } else {
+                    $effectiveTrigger = $parentComponent->DTSTART->getDateTime();
+                    $effectiveTrigger = $effectiveTrigger->add($triggerDuration);
+                }
+            }
+        } else {
+            $effectiveTrigger = $trigger->getDateTime();
+        }
+
+        return $effectiveTrigger;
+    }
+
+    /**
+     * Returns true or false depending on if the event falls in the specified
+     * time-range. This is used for filtering purposes.
+     *
+     * The rules used to determine if an event falls within the specified
+     * time-range is based on the CalDAV specification.
+     *
+     * @param DateTime $start
+     * @param DateTime $end
+     *
+     * @return bool
+     */
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
+        $effectiveTrigger = $this->getEffectiveTriggerTime();
+
+        if (isset($this->DURATION)) {
+            $duration = VObject\DateTimeParser::parseDuration($this->DURATION);
+            $repeat = (string) $this->REPEAT;
+            if (!$repeat) {
+                $repeat = 1;
+            }
+
+            $period = new \DatePeriod($effectiveTrigger, $duration, (int) $repeat);
+
+            foreach ($period as $occurrence) {
+                if ($start <= $occurrence && $end > $occurrence) {
+                    return true;
+                }
+            }
+
+            return false;
+        } else {
+            return $start <= $effectiveTrigger && $end > $effectiveTrigger;
+        }
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'ACTION' => 1,
+            'TRIGGER' => 1,
+
+            'DURATION' => '?',
+            'REPEAT' => '?',
+
+            'ATTACH' => '?',
+        ];
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VAvailability.php
+++ b/vendor/sabre/vobject/lib/Component/VAvailability.php
@@ -0,0 +1,149 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeInterface;
+use Sabre\VObject;
+
+/**
+ * The VAvailability component.
+ *
+ * This component adds functionality to a component, specific for VAVAILABILITY
+ * components.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Ivan Enderlin
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VAvailability extends VObject\Component
+{
+    /**
+     * Returns true or false depending on if the event falls in the specified
+     * time-range. This is used for filtering purposes.
+     *
+     * The rules used to determine if an event falls within the specified
+     * time-range is based on:
+     *
+     * https://tools.ietf.org/html/draft-daboo-calendar-availability-05#section-3.1
+     *
+     * @return bool
+     */
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
+        list($effectiveStart, $effectiveEnd) = $this->getEffectiveStartEnd();
+
+        return
+            (is_null($effectiveStart) || $start < $effectiveEnd) &&
+            (is_null($effectiveEnd) || $end > $effectiveStart)
+        ;
+    }
+
+    /**
+     * Returns the 'effective start' and 'effective end' of this VAVAILABILITY
+     * component.
+     *
+     * We use the DTSTART and DTEND or DURATION to determine this.
+     *
+     * The returned value is an array containing DateTimeImmutable instances.
+     * If either the start or end is 'unbounded' its value will be null
+     * instead.
+     *
+     * @return array
+     */
+    public function getEffectiveStartEnd()
+    {
+        $effectiveStart = null;
+        $effectiveEnd = null;
+
+        if (isset($this->DTSTART)) {
+            $effectiveStart = $this->DTSTART->getDateTime();
+        }
+        if (isset($this->DTEND)) {
+            $effectiveEnd = $this->DTEND->getDateTime();
+        } elseif ($effectiveStart && isset($this->DURATION)) {
+            $effectiveEnd = $effectiveStart->add(VObject\DateTimeParser::parseDuration($this->DURATION));
+        }
+
+        return [$effectiveStart, $effectiveEnd];
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'UID' => 1,
+            'DTSTAMP' => 1,
+
+            'BUSYTYPE' => '?',
+            'CLASS' => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'DTSTART' => '?',
+            'LAST-MODIFIED' => '?',
+            'ORGANIZER' => '?',
+            'PRIORITY' => '?',
+            'SEQUENCE' => '?',
+            'SUMMARY' => '?',
+            'URL' => '?',
+            'DTEND' => '?',
+            'DURATION' => '?',
+
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+        ];
+    }
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *   Node::PROFILE_CARDDAV - Validate the vCard for CardDAV purposes.
+     *   Node::PROFILE_CALDAV - Validate the iCalendar for CalDAV purposes.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on).
+     *   2 - A warning.
+     *   3 - An error.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        $result = parent::validate($options);
+
+        if (isset($this->DTEND) && isset($this->DURATION)) {
+            $result[] = [
+                'level' => 3,
+                'message' => 'DTEND and DURATION cannot both be present',
+                'node' => $this,
+            ];
+        }
+
+        return $result;
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VCalendar.php
+++ b/vendor/sabre/vobject/lib/Component/VCalendar.php
@@ -0,0 +1,528 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeInterface;
+use DateTimeZone;
+use Sabre\VObject;
+use Sabre\VObject\Component;
+use Sabre\VObject\InvalidDataException;
+use Sabre\VObject\Property;
+use Sabre\VObject\Recur\EventIterator;
+use Sabre\VObject\Recur\NoInstancesException;
+
+/**
+ * The VCalendar component.
+ *
+ * This component adds functionality to a component, specific for a VCALENDAR.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VCalendar extends VObject\Document
+{
+    /**
+     * The default name for this component.
+     *
+     * This should be 'VCALENDAR' or 'VCARD'.
+     *
+     * @var string
+     */
+    public static $defaultName = 'VCALENDAR';
+
+    /**
+     * This is a list of components, and which classes they should map to.
+     *
+     * @var array
+     */
+    public static $componentMap = [
+        'VCALENDAR' => self::class,
+        'VALARM' => VAlarm::class,
+        'VEVENT' => VEvent::class,
+        'VFREEBUSY' => VFreeBusy::class,
+        'VAVAILABILITY' => VAvailability::class,
+        'AVAILABLE' => Available::class,
+        'VJOURNAL' => VJournal::class,
+        'VTIMEZONE' => VTimeZone::class,
+        'VTODO' => VTodo::class,
+    ];
+
+    /**
+     * List of value-types, and which classes they map to.
+     *
+     * @var array
+     */
+    public static $valueMap = [
+        'BINARY' => VObject\Property\Binary::class,
+        'BOOLEAN' => VObject\Property\Boolean::class,
+        'CAL-ADDRESS' => VObject\Property\ICalendar\CalAddress::class,
+        'DATE' => VObject\Property\ICalendar\Date::class,
+        'DATE-TIME' => VObject\Property\ICalendar\DateTime::class,
+        'DURATION' => VObject\Property\ICalendar\Duration::class,
+        'FLOAT' => VObject\Property\FloatValue::class,
+        'INTEGER' => VObject\Property\IntegerValue::class,
+        'PERIOD' => VObject\Property\ICalendar\Period::class,
+        'RECUR' => VObject\Property\ICalendar\Recur::class,
+        'TEXT' => VObject\Property\Text::class,
+        'TIME' => VObject\Property\Time::class,
+        'UNKNOWN' => VObject\Property\Unknown::class, // jCard / jCal-only.
+        'URI' => VObject\Property\Uri::class,
+        'UTC-OFFSET' => VObject\Property\UtcOffset::class,
+    ];
+
+    /**
+     * List of properties, and which classes they map to.
+     *
+     * @var array
+     */
+    public static $propertyMap = [
+        // Calendar properties
+        'CALSCALE' => VObject\Property\FlatText::class,
+        'METHOD' => VObject\Property\FlatText::class,
+        'PRODID' => VObject\Property\FlatText::class,
+        'VERSION' => VObject\Property\FlatText::class,
+
+        // Component properties
+        'ATTACH' => VObject\Property\Uri::class,
+        'CATEGORIES' => VObject\Property\Text::class,
+        'CLASS' => VObject\Property\FlatText::class,
+        'COMMENT' => VObject\Property\FlatText::class,
+        'DESCRIPTION' => VObject\Property\FlatText::class,
+        'GEO' => VObject\Property\FloatValue::class,
+        'LOCATION' => VObject\Property\FlatText::class,
+        'PERCENT-COMPLETE' => VObject\Property\IntegerValue::class,
+        'PRIORITY' => VObject\Property\IntegerValue::class,
+        'RESOURCES' => VObject\Property\Text::class,
+        'STATUS' => VObject\Property\FlatText::class,
+        'SUMMARY' => VObject\Property\FlatText::class,
+
+        // Date and Time Component Properties
+        'COMPLETED' => VObject\Property\ICalendar\DateTime::class,
+        'DTEND' => VObject\Property\ICalendar\DateTime::class,
+        'DUE' => VObject\Property\ICalendar\DateTime::class,
+        'DTSTART' => VObject\Property\ICalendar\DateTime::class,
+        'DURATION' => VObject\Property\ICalendar\Duration::class,
+        'FREEBUSY' => VObject\Property\ICalendar\Period::class,
+        'TRANSP' => VObject\Property\FlatText::class,
+
+        // Time Zone Component Properties
+        'TZID' => VObject\Property\FlatText::class,
+        'TZNAME' => VObject\Property\FlatText::class,
+        'TZOFFSETFROM' => VObject\Property\UtcOffset::class,
+        'TZOFFSETTO' => VObject\Property\UtcOffset::class,
+        'TZURL' => VObject\Property\Uri::class,
+
+        // Relationship Component Properties
+        'ATTENDEE' => VObject\Property\ICalendar\CalAddress::class,
+        'CONTACT' => VObject\Property\FlatText::class,
+        'ORGANIZER' => VObject\Property\ICalendar\CalAddress::class,
+        'RECURRENCE-ID' => VObject\Property\ICalendar\DateTime::class,
+        'RELATED-TO' => VObject\Property\FlatText::class,
+        'URL' => VObject\Property\Uri::class,
+        'UID' => VObject\Property\FlatText::class,
+
+        // Recurrence Component Properties
+        'EXDATE' => VObject\Property\ICalendar\DateTime::class,
+        'RDATE' => VObject\Property\ICalendar\DateTime::class,
+        'RRULE' => VObject\Property\ICalendar\Recur::class,
+        'EXRULE' => VObject\Property\ICalendar\Recur::class, // Deprecated since rfc5545
+
+        // Alarm Component Properties
+        'ACTION' => VObject\Property\FlatText::class,
+        'REPEAT' => VObject\Property\IntegerValue::class,
+        'TRIGGER' => VObject\Property\ICalendar\Duration::class,
+
+        // Change Management Component Properties
+        'CREATED' => VObject\Property\ICalendar\DateTime::class,
+        'DTSTAMP' => VObject\Property\ICalendar\DateTime::class,
+        'LAST-MODIFIED' => VObject\Property\ICalendar\DateTime::class,
+        'SEQUENCE' => VObject\Property\IntegerValue::class,
+
+        // Request Status
+        'REQUEST-STATUS' => VObject\Property\Text::class,
+
+        // Additions from draft-daboo-valarm-extensions-04
+        'ALARM-AGENT' => VObject\Property\Text::class,
+        'ACKNOWLEDGED' => VObject\Property\ICalendar\DateTime::class,
+        'PROXIMITY' => VObject\Property\Text::class,
+        'DEFAULT-ALARM' => VObject\Property\Boolean::class,
+
+        // Additions from draft-daboo-calendar-availability-05
+        'BUSYTYPE' => VObject\Property\Text::class,
+    ];
+
+    /**
+     * Returns the current document type.
+     *
+     * @return int
+     */
+    public function getDocumentType()
+    {
+        return self::ICALENDAR20;
+    }
+
+    /**
+     * Returns a list of all 'base components'. For instance, if an Event has
+     * a recurrence rule, and one instance is overridden, the overridden event
+     * will have the same UID, but will be excluded from this list.
+     *
+     * VTIMEZONE components will always be excluded.
+     *
+     * @param string $componentName filter by component name
+     *
+     * @return VObject\Component[]
+     */
+    public function getBaseComponents($componentName = null)
+    {
+        $isBaseComponent = function ($component) {
+            if (!$component instanceof VObject\Component) {
+                return false;
+            }
+            if ('VTIMEZONE' === $component->name) {
+                return false;
+            }
+            if (isset($component->{'RECURRENCE-ID'})) {
+                return false;
+            }
+
+            return true;
+        };
+
+        if ($componentName) {
+            // Early exit
+            return array_filter(
+                $this->select($componentName),
+                $isBaseComponent
+            );
+        }
+
+        $components = [];
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                if (!$child instanceof Component) {
+                    // If one child is not a component, they all are so we skip
+                    // the entire group.
+                    continue 2;
+                }
+                if ($isBaseComponent($child)) {
+                    $components[] = $child;
+                }
+            }
+        }
+
+        return $components;
+    }
+
+    /**
+     * Returns the first component that is not a VTIMEZONE, and does not have
+     * an RECURRENCE-ID.
+     *
+     * If there is no such component, null will be returned.
+     *
+     * @param string $componentName filter by component name
+     *
+     * @return VObject\Component|null
+     */
+    public function getBaseComponent($componentName = null)
+    {
+        $isBaseComponent = function ($component) {
+            if (!$component instanceof VObject\Component) {
+                return false;
+            }
+            if ('VTIMEZONE' === $component->name) {
+                return false;
+            }
+            if (isset($component->{'RECURRENCE-ID'})) {
+                return false;
+            }
+
+            return true;
+        };
+
+        if ($componentName) {
+            foreach ($this->select($componentName) as $child) {
+                if ($isBaseComponent($child)) {
+                    return $child;
+                }
+            }
+
+            return null;
+        }
+
+        // Searching all components
+        foreach ($this->children as $childGroup) {
+            foreach ($childGroup as $child) {
+                if ($isBaseComponent($child)) {
+                    return $child;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * Expand all events in this VCalendar object and return a new VCalendar
+     * with the expanded events.
+     *
+     * If this calendar object, has events with recurrence rules, this method
+     * can be used to expand the event into multiple sub-events.
+     *
+     * Each event will be stripped from its recurrence information, and only
+     * the instances of the event in the specified timerange will be left
+     * alone.
+     *
+     * In addition, this method will cause timezone information to be stripped,
+     * and normalized to UTC.
+     *
+     * @param DateTimeZone $timeZone reference timezone for floating dates and
+     *                               times
+     *
+     * @return VCalendar
+     */
+    public function expand(DateTimeInterface $start, DateTimeInterface $end, ?DateTimeZone $timeZone = null)
+    {
+        $newChildren = [];
+        $recurringEvents = [];
+
+        if (!$timeZone) {
+            $timeZone = new DateTimeZone('UTC');
+        }
+
+        $stripTimezones = function (Component $component) use ($timeZone, &$stripTimezones) {
+            foreach ($component->children() as $componentChild) {
+                if ($componentChild instanceof Property\ICalendar\DateTime && $componentChild->hasTime()) {
+                    $dt = $componentChild->getDateTimes($timeZone);
+                    // We only need to update the first timezone, because
+                    // setDateTimes will match all other timezones to the
+                    // first.
+                    $dt[0] = $dt[0]->setTimeZone(new DateTimeZone('UTC'));
+                    $componentChild->setDateTimes($dt);
+                } elseif ($componentChild instanceof Component) {
+                    $stripTimezones($componentChild);
+                }
+            }
+
+            return $component;
+        };
+
+        foreach ($this->children() as $child) {
+            if ($child instanceof Property && 'PRODID' !== $child->name) {
+                // We explicitly want to ignore PRODID, because we want to
+                // overwrite it with our own.
+                $newChildren[] = clone $child;
+            } elseif ($child instanceof Component && 'VTIMEZONE' !== $child->name) {
+                // We're also stripping all VTIMEZONE objects because we're
+                // converting everything to UTC.
+                if ('VEVENT' === $child->name && (isset($child->{'RECURRENCE-ID'}) || isset($child->RRULE) || isset($child->RDATE))) {
+                    // Handle these a bit later.
+                    $uid = (string) $child->UID;
+                    if (!$uid) {
+                        throw new InvalidDataException('Every VEVENT object must have a UID property');
+                    }
+                    if (isset($recurringEvents[$uid])) {
+                        $recurringEvents[$uid][] = clone $child;
+                    } else {
+                        $recurringEvents[$uid] = [clone $child];
+                    }
+                } elseif ('VEVENT' === $child->name && $child->isInTimeRange($start, $end)) {
+                    $newChildren[] = $stripTimezones(clone $child);
+                }
+            }
+        }
+
+        foreach ($recurringEvents as $events) {
+            try {
+                $it = new EventIterator($events, null, $timeZone);
+            } catch (NoInstancesException $e) {
+                // This event is recurring, but it doesn't have a single
+                // instance. We are skipping this event from the output
+                // entirely.
+                continue;
+            }
+            $it->fastForward($start);
+
+            while ($it->valid() && $it->getDTStart() < $end) {
+                if ($it->getDTEnd() > $start) {
+                    $newChildren[] = $stripTimezones($it->getEventObject());
+                }
+                $it->next();
+            }
+        }
+
+        return new self($newChildren);
+    }
+
+    /**
+     * This method should return a list of default property values.
+     *
+     * @return array
+     */
+    protected function getDefaults()
+    {
+        return [
+            'VERSION' => '2.0',
+            'PRODID' => '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN',
+            'CALSCALE' => 'GREGORIAN',
+        ];
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'PRODID' => 1,
+            'VERSION' => 1,
+
+            'CALSCALE' => '?',
+            'METHOD' => '?',
+        ];
+    }
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *   Node::PROFILE_CARDDAV - Validate the vCard for CardDAV purposes.
+     *   Node::PROFILE_CALDAV - Validate the iCalendar for CalDAV purposes.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on).
+     *   2 - A warning.
+     *   3 - An error.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        $warnings = parent::validate($options);
+
+        if ($ver = $this->VERSION) {
+            if ('2.0' !== (string) $ver) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'Only iCalendar version 2.0 as defined in rfc5545 is supported.',
+                    'node' => $this,
+                ];
+            }
+        }
+
+        $uidList = [];
+        $componentsFound = 0;
+        $componentTypes = [];
+
+        foreach ($this->children() as $child) {
+            if ($child instanceof Component) {
+                ++$componentsFound;
+
+                if (!in_array($child->name, ['VEVENT', 'VTODO', 'VJOURNAL'])) {
+                    continue;
+                }
+                $componentTypes[] = $child->name;
+
+                $uid = (string) $child->UID;
+                $isMaster = isset($child->{'RECURRENCE-ID'}) ? 0 : 1;
+                if (isset($uidList[$uid])) {
+                    ++$uidList[$uid]['count'];
+                    if ($isMaster && $uidList[$uid]['hasMaster']) {
+                        $warnings[] = [
+                            'level' => 3,
+                            'message' => 'More than one master object was found for the object with UID '.$uid,
+                            'node' => $this,
+                        ];
+                    }
+                    $uidList[$uid]['hasMaster'] += $isMaster;
+                } else {
+                    $uidList[$uid] = [
+                        'count' => 1,
+                        'hasMaster' => $isMaster,
+                    ];
+                }
+            }
+        }
+
+        if (0 === $componentsFound) {
+            $warnings[] = [
+                'level' => 3,
+                'message' => 'An iCalendar object must have at least 1 component.',
+                'node' => $this,
+            ];
+        }
+
+        if ($options & self::PROFILE_CALDAV) {
+            if (count($uidList) > 1) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'A calendar object on a CalDAV server may only have components with the same UID.',
+                    'node' => $this,
+                ];
+            }
+            if (0 === count($componentTypes)) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'A calendar object on a CalDAV server must have at least 1 component (VTODO, VEVENT, VJOURNAL).',
+                    'node' => $this,
+                ];
+            }
+            if (count(array_unique($componentTypes)) > 1) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'A calendar object on a CalDAV server may only have 1 type of component (VEVENT, VTODO or VJOURNAL).',
+                    'node' => $this,
+                ];
+            }
+
+            if (isset($this->METHOD)) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'A calendar object on a CalDAV server MUST NOT have a METHOD property.',
+                    'node' => $this,
+                ];
+            }
+        }
+
+        return $warnings;
+    }
+
+    /**
+     * Returns all components with a specific UID value.
+     *
+     * @return array
+     */
+    public function getByUID($uid)
+    {
+        return array_filter($this->getComponents(), function ($item) use ($uid) {
+            if (!$itemUid = $item->select('UID')) {
+                return false;
+            }
+            $itemUid = current($itemUid)->getValue();
+
+            return $uid === $itemUid;
+        });
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VCard.php
+++ b/vendor/sabre/vobject/lib/Component/VCard.php
@@ -0,0 +1,541 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use Sabre\VObject;
+use Sabre\Xml;
+
+/**
+ * The VCard component.
+ *
+ * This component represents the BEGIN:VCARD and END:VCARD found in every
+ * vcard.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VCard extends VObject\Document
+{
+    /**
+     * The default name for this component.
+     *
+     * This should be 'VCALENDAR' or 'VCARD'.
+     *
+     * @var string
+     */
+    public static $defaultName = 'VCARD';
+
+    /**
+     * Caching the version number.
+     *
+     * @var int
+     */
+    private $version = null;
+
+    /**
+     * This is a list of components, and which classes they should map to.
+     *
+     * @var array
+     */
+    public static $componentMap = [
+        'VCARD' => VCard::class,
+    ];
+
+    /**
+     * List of value-types, and which classes they map to.
+     *
+     * @var array
+     */
+    public static $valueMap = [
+        'BINARY' => VObject\Property\Binary::class,
+        'BOOLEAN' => VObject\Property\Boolean::class,
+        'CONTENT-ID' => VObject\Property\FlatText::class,   // vCard 2.1 only
+        'DATE' => VObject\Property\VCard\Date::class,
+        'DATE-TIME' => VObject\Property\VCard\DateTime::class,
+        'DATE-AND-OR-TIME' => VObject\Property\VCard\DateAndOrTime::class, // vCard only
+        'FLOAT' => VObject\Property\FloatValue::class,
+        'INTEGER' => VObject\Property\IntegerValue::class,
+        'LANGUAGE-TAG' => VObject\Property\VCard\LanguageTag::class,
+        'PHONE-NUMBER' => VObject\Property\VCard\PhoneNumber::class, // vCard 3.0 only
+        'TIMESTAMP' => VObject\Property\VCard\TimeStamp::class,
+        'TEXT' => VObject\Property\Text::class,
+        'TIME' => VObject\Property\Time::class,
+        'UNKNOWN' => VObject\Property\Unknown::class, // jCard / jCal-only.
+        'URI' => VObject\Property\Uri::class,
+        'URL' => VObject\Property\Uri::class, // vCard 2.1 only
+        'UTC-OFFSET' => VObject\Property\UtcOffset::class,
+    ];
+
+    /**
+     * List of properties, and which classes they map to.
+     *
+     * @var array
+     */
+    public static $propertyMap = [
+        // vCard 2.1 properties and up
+        'N' => VObject\Property\Text::class,
+        'FN' => VObject\Property\FlatText::class,
+        'PHOTO' => VObject\Property\Binary::class,
+        'BDAY' => VObject\Property\VCard\DateAndOrTime::class,
+        'ADR' => VObject\Property\Text::class,
+        'LABEL' => VObject\Property\FlatText::class, // Removed in vCard 4.0
+        'TEL' => VObject\Property\FlatText::class,
+        'EMAIL' => VObject\Property\FlatText::class,
+        'MAILER' => VObject\Property\FlatText::class, // Removed in vCard 4.0
+        'GEO' => VObject\Property\FlatText::class,
+        'TITLE' => VObject\Property\FlatText::class,
+        'ROLE' => VObject\Property\FlatText::class,
+        'LOGO' => VObject\Property\Binary::class,
+        // 'AGENT'   => 'Sabre\\VObject\\Property\\',      // Todo: is an embedded vCard. Probably rare, so
+                                 // not supported at the moment
+        'ORG' => VObject\Property\Text::class,
+        'NOTE' => VObject\Property\FlatText::class,
+        'REV' => VObject\Property\VCard\TimeStamp::class,
+        'SOUND' => VObject\Property\FlatText::class,
+        'URL' => VObject\Property\Uri::class,
+        'UID' => VObject\Property\FlatText::class,
+        'VERSION' => VObject\Property\FlatText::class,
+        'KEY' => VObject\Property\FlatText::class,
+        'TZ' => VObject\Property\Text::class,
+
+        // vCard 3.0 properties
+        'CATEGORIES' => VObject\Property\Text::class,
+        'SORT-STRING' => VObject\Property\FlatText::class,
+        'PRODID' => VObject\Property\FlatText::class,
+        'NICKNAME' => VObject\Property\Text::class,
+        'CLASS' => VObject\Property\FlatText::class, // Removed in vCard 4.0
+
+        // rfc2739 properties
+        'FBURL' => VObject\Property\Uri::class,
+        'CAPURI' => VObject\Property\Uri::class,
+        'CALURI' => VObject\Property\Uri::class,
+        'CALADRURI' => VObject\Property\Uri::class,
+
+        // rfc4770 properties
+        'IMPP' => VObject\Property\Uri::class,
+
+        // vCard 4.0 properties
+        'SOURCE' => VObject\Property\Uri::class,
+        'XML' => VObject\Property\FlatText::class,
+        'ANNIVERSARY' => VObject\Property\VCard\DateAndOrTime::class,
+        'CLIENTPIDMAP' => VObject\Property\Text::class,
+        'LANG' => VObject\Property\VCard\LanguageTag::class,
+        'GENDER' => VObject\Property\Text::class,
+        'KIND' => VObject\Property\FlatText::class,
+        'MEMBER' => VObject\Property\Uri::class,
+        'RELATED' => VObject\Property\Uri::class,
+
+        // rfc6474 properties
+        'BIRTHPLACE' => VObject\Property\FlatText::class,
+        'DEATHPLACE' => VObject\Property\FlatText::class,
+        'DEATHDATE' => VObject\Property\VCard\DateAndOrTime::class,
+
+        // rfc6715 properties
+        'EXPERTISE' => VObject\Property\FlatText::class,
+        'HOBBY' => VObject\Property\FlatText::class,
+        'INTEREST' => VObject\Property\FlatText::class,
+        'ORG-DIRECTORY' => VObject\Property\FlatText::class,
+    ];
+
+    /**
+     * Returns the current document type.
+     *
+     * @return int
+     */
+    public function getDocumentType()
+    {
+        if (!$this->version) {
+            $version = (string) $this->VERSION;
+
+            switch ($version) {
+                case '2.1':
+                    $this->version = self::VCARD21;
+                    break;
+                case '3.0':
+                    $this->version = self::VCARD30;
+                    break;
+                case '4.0':
+                    $this->version = self::VCARD40;
+                    break;
+                default:
+                    // We don't want to cache the version if it's unknown,
+                    // because we might get a version property in a bit.
+                    return self::UNKNOWN;
+            }
+        }
+
+        return $this->version;
+    }
+
+    /**
+     * Converts the document to a different vcard version.
+     *
+     * Use one of the VCARD constants for the target. This method will return
+     * a copy of the vcard in the new version.
+     *
+     * At the moment the only supported conversion is from 3.0 to 4.0.
+     *
+     * If input and output version are identical, a clone is returned.
+     *
+     * @param int $target
+     *
+     * @return VCard
+     */
+    public function convert($target)
+    {
+        $converter = new VObject\VCardConverter();
+
+        return $converter->convert($this, $target);
+    }
+
+    /**
+     * VCards with version 2.1, 3.0 and 4.0 are found.
+     *
+     * If the VCARD doesn't know its version, 2.1 is assumed.
+     */
+    const DEFAULT_VERSION = self::VCARD21;
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on)
+     *   2 - An inconsequential issue
+     *   3 - A severe issue.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        $warnings = [];
+
+        $versionMap = [
+            self::VCARD21 => '2.1',
+            self::VCARD30 => '3.0',
+            self::VCARD40 => '4.0',
+        ];
+
+        $version = $this->select('VERSION');
+        if (1 === count($version)) {
+            $version = (string) $this->VERSION;
+            if ('2.1' !== $version && '3.0' !== $version && '4.0' !== $version) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'Only vcard version 4.0 (RFC6350), version 3.0 (RFC2426) or version 2.1 (icm-vcard-2.1) are supported.',
+                    'node' => $this,
+                ];
+                if ($options & self::REPAIR) {
+                    $this->VERSION = $versionMap[self::DEFAULT_VERSION];
+                }
+            }
+            if ('2.1' === $version && ($options & self::PROFILE_CARDDAV)) {
+                $warnings[] = [
+                    'level' => 3,
+                    'message' => 'CardDAV servers are not allowed to accept vCard 2.1.',
+                    'node' => $this,
+                ];
+            }
+        }
+        $uid = $this->select('UID');
+        if (0 === count($uid)) {
+            if ($options & self::PROFILE_CARDDAV) {
+                // Required for CardDAV
+                $warningLevel = 3;
+                $message = 'vCards on CardDAV servers MUST have a UID property.';
+            } else {
+                // Not required for regular vcards
+                $warningLevel = 2;
+                $message = 'Adding a UID to a vCard property is recommended.';
+            }
+            if ($options & self::REPAIR) {
+                $this->UID = VObject\UUIDUtil::getUUID();
+                $warningLevel = 1;
+            }
+            $warnings[] = [
+                'level' => $warningLevel,
+                'message' => $message,
+                'node' => $this,
+            ];
+        }
+
+        $fn = $this->select('FN');
+        if (1 !== count($fn)) {
+            $repaired = false;
+            if (($options & self::REPAIR) && 0 === count($fn)) {
+                // We're going to try to see if we can use the contents of the
+                // N property.
+                if (isset($this->N)) {
+                    $value = explode(';', (string) $this->N);
+                    if (isset($value[1]) && $value[1]) {
+                        $this->FN = $value[1].' '.$value[0];
+                    } else {
+                        $this->FN = $value[0];
+                    }
+                    $repaired = true;
+
+                // Otherwise, the ORG property may work
+                } elseif (isset($this->ORG)) {
+                    $this->FN = (string) $this->ORG;
+                    $repaired = true;
+
+                // Otherwise, the NICKNAME property may work
+                } elseif (isset($this->NICKNAME)) {
+                    $this->FN = (string) $this->NICKNAME;
+                    $repaired = true;
+
+                // Otherwise, the EMAIL property may work
+                } elseif (isset($this->EMAIL)) {
+                    $this->FN = (string) $this->EMAIL;
+                    $repaired = true;
+                }
+            }
+            $warnings[] = [
+                'level' => $repaired ? 1 : 3,
+                'message' => 'The FN property must appear in the VCARD component exactly 1 time',
+                'node' => $this,
+            ];
+        }
+
+        return array_merge(
+            parent::validate($options),
+            $warnings
+        );
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'ADR' => '*',
+            'ANNIVERSARY' => '?',
+            'BDAY' => '?',
+            'CALADRURI' => '*',
+            'CALURI' => '*',
+            'CATEGORIES' => '*',
+            'CLIENTPIDMAP' => '*',
+            'EMAIL' => '*',
+            'FBURL' => '*',
+            'IMPP' => '*',
+            'GENDER' => '?',
+            'GEO' => '*',
+            'KEY' => '*',
+            'KIND' => '?',
+            'LANG' => '*',
+            'LOGO' => '*',
+            'MEMBER' => '*',
+            'N' => '?',
+            'NICKNAME' => '*',
+            'NOTE' => '*',
+            'ORG' => '*',
+            'PHOTO' => '*',
+            'PRODID' => '?',
+            'RELATED' => '*',
+            'REV' => '?',
+            'ROLE' => '*',
+            'SOUND' => '*',
+            'SOURCE' => '*',
+            'TEL' => '*',
+            'TITLE' => '*',
+            'TZ' => '*',
+            'URL' => '*',
+            'VERSION' => '1',
+            'XML' => '*',
+
+            // FN is commented out, because it's already handled by the
+            // validate function, which may also try to repair it.
+            // 'FN'           => '+',
+            'UID' => '?',
+        ];
+    }
+
+    /**
+     * Returns a preferred field.
+     *
+     * VCards can indicate whether a field such as ADR, TEL or EMAIL is
+     * preferred by specifying TYPE=PREF (vcard 2.1, 3) or PREF=x (vcard 4, x
+     * being a number between 1 and 100).
+     *
+     * If neither of those parameters are specified, the first is returned, if
+     * a field with that name does not exist, null is returned.
+     *
+     * @param string $fieldName
+     *
+     * @return VObject\Property|null
+     */
+    public function preferred($propertyName)
+    {
+        $preferred = null;
+        $lastPref = 101;
+        foreach ($this->select($propertyName) as $field) {
+            $pref = 101;
+            if (isset($field['TYPE']) && $field['TYPE']->has('PREF')) {
+                $pref = 1;
+            } elseif (isset($field['PREF'])) {
+                $pref = $field['PREF']->getValue();
+            }
+
+            if ($pref < $lastPref || is_null($preferred)) {
+                $preferred = $field;
+                $lastPref = $pref;
+            }
+        }
+
+        return $preferred;
+    }
+
+    /**
+     * Returns a property with a specific TYPE value (ADR, TEL, or EMAIL).
+     *
+     * This function will return null if the property does not exist. If there are
+     * multiple properties with the same TYPE value, only one will be returned.
+     *
+     * @param string $propertyName
+     * @param string $type
+     *
+     * @return VObject\Property|null
+     */
+    public function getByType($propertyName, $type)
+    {
+        foreach ($this->select($propertyName) as $field) {
+            if (isset($field['TYPE']) && $field['TYPE']->has($type)) {
+                return $field;
+            }
+        }
+    }
+
+    /**
+     * This method should return a list of default property values.
+     *
+     * @return array
+     */
+    protected function getDefaults()
+    {
+        return [
+            'VERSION' => '4.0',
+            'PRODID' => '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN',
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
+        ];
+    }
+
+    /**
+     * This method returns an array, with the representation as it should be
+     * encoded in json. This is used to create jCard or jCal documents.
+     *
+     * @return array
+     */
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize()
+    {
+        // A vcard does not have sub-components, so we're overriding this
+        // method to remove that array element.
+        $properties = [];
+
+        foreach ($this->children() as $child) {
+            $properties[] = $child->jsonSerialize();
+        }
+
+        return [
+            strtolower($this->name),
+            $properties,
+        ];
+    }
+
+    /**
+     * This method serializes the data into XML. This is used to create xCard or
+     * xCal documents.
+     *
+     * @param Xml\Writer $writer XML writer
+     */
+    public function xmlSerialize(Xml\Writer $writer): void
+    {
+        $propertiesByGroup = [];
+
+        foreach ($this->children() as $property) {
+            $group = $property->group;
+
+            if (!isset($propertiesByGroup[$group])) {
+                $propertiesByGroup[$group] = [];
+            }
+
+            $propertiesByGroup[$group][] = $property;
+        }
+
+        $writer->startElement(strtolower($this->name));
+
+        foreach ($propertiesByGroup as $group => $properties) {
+            if (!empty($group)) {
+                $writer->startElement('group');
+                $writer->writeAttribute('name', strtolower($group));
+            }
+
+            foreach ($properties as $property) {
+                switch ($property->name) {
+                    case 'VERSION':
+                        break;
+
+                    case 'XML':
+                        $value = $property->getParts();
+                        $fragment = new Xml\Element\XmlFragment($value[0]);
+                        $writer->write($fragment);
+                        break;
+
+                    default:
+                        $property->xmlSerialize($writer);
+                        break;
+                }
+            }
+
+            if (!empty($group)) {
+                $writer->endElement();
+            }
+        }
+
+        $writer->endElement();
+    }
+
+    /**
+     * Returns the default class for a property name.
+     *
+     * @param string $propertyName
+     *
+     * @return string
+     */
+    public function getClassNameForPropertyName($propertyName)
+    {
+        $className = parent::getClassNameForPropertyName($propertyName);
+
+        // In vCard 4, BINARY no longer exists, and we need URI instead.
+        if (VObject\Property\Binary::class == $className && self::VCARD40 === $this->getDocumentType()) {
+            return VObject\Property\Uri::class;
+        }
+
+        return $className;
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VEvent.php
+++ b/vendor/sabre/vobject/lib/Component/VEvent.php
@@ -0,0 +1,140 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeInterface;
+use Sabre\VObject;
+use Sabre\VObject\Recur\EventIterator;
+use Sabre\VObject\Recur\NoInstancesException;
+
+/**
+ * VEvent component.
+ *
+ * This component contains some additional functionality specific for VEVENT's.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VEvent extends VObject\Component
+{
+    /**
+     * Returns true or false depending on if the event falls in the specified
+     * time-range. This is used for filtering purposes.
+     *
+     * The rules used to determine if an event falls within the specified
+     * time-range is based on the CalDAV specification.
+     *
+     * @return bool
+     */
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
+        if ($this->RRULE || $this->RDATE) {
+            try {
+                $it = new EventIterator($this, null, $start->getTimezone());
+            } catch (NoInstancesException $e) {
+                // If we've caught this exception, there are no instances
+                // for the event that fall into the specified time-range.
+                return false;
+            }
+
+            $it->fastForward($start);
+
+            // We fast-forwarded to a spot where the end-time of the
+            // recurrence instance exceeded the start of the requested
+            // time-range.
+            //
+            // If the starttime of the recurrence did not exceed the
+            // end of the time range as well, we have a match.
+            return $it->getDTStart() < $end && $it->getDTEnd() > $start;
+        }
+
+        $effectiveStart = $this->DTSTART->getDateTime($start->getTimezone());
+        if (isset($this->DTEND)) {
+            // The DTEND property is considered non inclusive. So for a 3 day
+            // event in july, dtstart and dtend would have to be July 1st and
+            // July 4th respectively.
+            //
+            // See:
+            // http://tools.ietf.org/html/rfc5545#page-54
+            $effectiveEnd = $this->DTEND->getDateTime($end->getTimezone());
+        } elseif (isset($this->DURATION)) {
+            $effectiveEnd = $effectiveStart->add(VObject\DateTimeParser::parseDuration($this->DURATION));
+        } elseif (!$this->DTSTART->hasTime()) {
+            $effectiveEnd = $effectiveStart->modify('+1 day');
+        } else {
+            $effectiveEnd = $effectiveStart;
+        }
+
+        return
+            ($start < $effectiveEnd) && ($end > $effectiveStart)
+        ;
+    }
+
+    /**
+     * This method should return a list of default property values.
+     *
+     * @return array
+     */
+    protected function getDefaults()
+    {
+        return [
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
+            'DTSTAMP' => gmdate('Ymd\\THis\\Z'),
+        ];
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        $hasMethod = isset($this->parent->METHOD);
+
+        return [
+            'UID' => 1,
+            'DTSTAMP' => 1,
+            'DTSTART' => $hasMethod ? '?' : '1',
+            'CLASS' => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'GEO' => '?',
+            'LAST-MODIFIED' => '?',
+            'LOCATION' => '?',
+            'ORGANIZER' => '?',
+            'PRIORITY' => '?',
+            'SEQUENCE' => '?',
+            'STATUS' => '?',
+            'SUMMARY' => '?',
+            'TRANSP' => '?',
+            'URL' => '?',
+            'RECURRENCE-ID' => '?',
+            'RRULE' => '?',
+            'DTEND' => '?',
+            'DURATION' => '?',
+
+            'ATTACH' => '*',
+            'ATTENDEE' => '*',
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'EXDATE' => '*',
+            'REQUEST-STATUS' => '*',
+            'RELATED-TO' => '*',
+            'RESOURCES' => '*',
+            'RDATE' => '*',
+        ];
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VFreeBusy.php
+++ b/vendor/sabre/vobject/lib/Component/VFreeBusy.php
@@ -0,0 +1,93 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeInterface;
+use Sabre\VObject;
+
+/**
+ * The VFreeBusy component.
+ *
+ * This component adds functionality to a component, specific for VFREEBUSY
+ * components.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VFreeBusy extends VObject\Component
+{
+    /**
+     * Checks based on the contained FREEBUSY information, if a timeslot is
+     * available.
+     *
+     * @return bool
+     */
+    public function isFree(DateTimeInterface $start, DatetimeInterface $end)
+    {
+        foreach ($this->select('FREEBUSY') as $freebusy) {
+            // We are only interested in FBTYPE=BUSY (the default),
+            // FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
+            if (isset($freebusy['FBTYPE']) && 'BUSY' !== strtoupper(substr((string) $freebusy['FBTYPE'], 0, 4))) {
+                continue;
+            }
+
+            // The freebusy component can hold more than 1 value, separated by
+            // commas.
+            $periods = explode(',', (string) $freebusy);
+
+            foreach ($periods as $period) {
+                // Every period is formatted as [start]/[end]. The start is an
+                // absolute UTC time, the end may be an absolute UTC time, or
+                // duration (relative) value.
+                list($busyStart, $busyEnd) = explode('/', $period);
+
+                $busyStart = VObject\DateTimeParser::parse($busyStart);
+                $busyEnd = VObject\DateTimeParser::parse($busyEnd);
+                if ($busyEnd instanceof \DateInterval) {
+                    $busyEnd = $busyStart->add($busyEnd);
+                }
+
+                if ($start < $busyEnd && $end > $busyStart) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'UID' => 1,
+            'DTSTAMP' => 1,
+
+            'CONTACT' => '?',
+            'DTSTART' => '?',
+            'DTEND' => '?',
+            'ORGANIZER' => '?',
+            'URL' => '?',
+
+            'ATTENDEE' => '*',
+            'COMMENT' => '*',
+            'FREEBUSY' => '*',
+            'REQUEST-STATUS' => '*',
+        ];
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VJournal.php
+++ b/vendor/sabre/vobject/lib/Component/VJournal.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeInterface;
+use Sabre\VObject;
+
+/**
+ * VJournal component.
+ *
+ * This component contains some additional functionality specific for VJOURNALs.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VJournal extends VObject\Component
+{
+    /**
+     * Returns true or false depending on if the event falls in the specified
+     * time-range. This is used for filtering purposes.
+     *
+     * The rules used to determine if an event falls within the specified
+     * time-range is based on the CalDAV specification.
+     *
+     * @return bool
+     */
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
+        $dtstart = isset($this->DTSTART) ? $this->DTSTART->getDateTime() : null;
+        if ($dtstart) {
+            $effectiveEnd = $dtstart;
+            if (!$this->DTSTART->hasTime()) {
+                $effectiveEnd = $effectiveEnd->modify('+1 day');
+            }
+
+            return $start <= $effectiveEnd && $end > $dtstart;
+        }
+
+        return false;
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'UID' => 1,
+            'DTSTAMP' => 1,
+
+            'CLASS' => '?',
+            'CREATED' => '?',
+            'DTSTART' => '?',
+            'LAST-MODIFIED' => '?',
+            'ORGANIZER' => '?',
+            'RECURRENCE-ID' => '?',
+            'SEQUENCE' => '?',
+            'STATUS' => '?',
+            'SUMMARY' => '?',
+            'URL' => '?',
+
+            'RRULE' => '?',
+
+            'ATTACH' => '*',
+            'ATTENDEE' => '*',
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'DESCRIPTION' => '*',
+            'EXDATE' => '*',
+            'RELATED-TO' => '*',
+            'RDATE' => '*',
+        ];
+    }
+
+    /**
+     * This method should return a list of default property values.
+     *
+     * @return array
+     */
+    protected function getDefaults()
+    {
+        return [
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
+            'DTSTAMP' => gmdate('Ymd\\THis\\Z'),
+        ];
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VTimeZone.php
+++ b/vendor/sabre/vobject/lib/Component/VTimeZone.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use Sabre\VObject;
+
+/**
+ * The VTimeZone component.
+ *
+ * This component adds functionality to a component, specific for VTIMEZONE
+ * components.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VTimeZone extends VObject\Component
+{
+    /**
+     * Returns the PHP DateTimeZone for this VTIMEZONE component.
+     *
+     * If we can't accurately determine the timezone, this method will return
+     * UTC.
+     *
+     * @return \DateTimeZone
+     */
+    public function getTimeZone()
+    {
+        return VObject\TimeZoneUtil::getTimeZone((string) $this->TZID, $this->root);
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'TZID' => 1,
+
+            'LAST-MODIFIED' => '?',
+            'TZURL' => '?',
+
+            // At least 1 STANDARD or DAYLIGHT must appear.
+            //
+            // The validator is not specific yet to pick this up, so these
+            // rules are too loose.
+            'STANDARD' => '*',
+            'DAYLIGHT' => '*',
+        ];
+    }
+}
--- a/vendor/sabre/vobject/lib/Component/VTodo.php
+++ b/vendor/sabre/vobject/lib/Component/VTodo.php
@@ -0,0 +1,181 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use DateTimeInterface;
+use Sabre\VObject;
+
+/**
+ * VTodo component.
+ *
+ * This component contains some additional functionality specific for VTODOs.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VTodo extends VObject\Component
+{
+    /**
+     * Returns true or false depending on if the event falls in the specified
+     * time-range. This is used for filtering purposes.
+     *
+     * The rules used to determine if an event falls within the specified
+     * time-range is based on the CalDAV specification.
+     *
+     * @return bool
+     */
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
+        $dtstart = isset($this->DTSTART) ? $this->DTSTART->getDateTime() : null;
+        $duration = isset($this->DURATION) ? VObject\DateTimeParser::parseDuration($this->DURATION) : null;
+        $due = isset($this->DUE) ? $this->DUE->getDateTime() : null;
+        $completed = isset($this->COMPLETED) ? $this->COMPLETED->getDateTime() : null;
+        $created = isset($this->CREATED) ? $this->CREATED->getDateTime() : null;
+
+        if ($dtstart) {
+            if ($duration) {
+                $effectiveEnd = $dtstart->add($duration);
+
+                return $start <= $effectiveEnd && $end > $dtstart;
+            } elseif ($due) {
+                return
+                    ($start < $due || $start <= $dtstart) &&
+                    ($end > $dtstart || $end >= $due);
+            } else {
+                return $start <= $dtstart && $end > $dtstart;
+            }
+        }
+        if ($due) {
+            return $start < $due && $end >= $due;
+        }
+        if ($completed && $created) {
+            return
+                ($start <= $created || $start <= $completed) &&
+                ($end >= $created || $end >= $completed);
+        }
+        if ($completed) {
+            return $start <= $completed && $end >= $completed;
+        }
+        if ($created) {
+            return $end > $created;
+        }
+
+        return true;
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *   * ? - May appear, but not more than once.
+     *
+     * @var array
+     */
+    public function getValidationRules()
+    {
+        return [
+            'UID' => 1,
+            'DTSTAMP' => 1,
+
+            'CLASS' => '?',
+            'COMPLETED' => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'DTSTART' => '?',
+            'GEO' => '?',
+            'LAST-MODIFIED' => '?',
+            'LOCATION' => '?',
+            'ORGANIZER' => '?',
+            'PERCENT' => '?',
+            'PRIORITY' => '?',
+            'RECURRENCE-ID' => '?',
+            'SEQUENCE' => '?',
+            'STATUS' => '?',
+            'SUMMARY' => '?',
+            'URL' => '?',
+
+            'RRULE' => '?',
+            'DUE' => '?',
+            'DURATION' => '?',
+
+            'ATTACH' => '*',
+            'ATTENDEE' => '*',
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'EXDATE' => '*',
+            'REQUEST-STATUS' => '*',
+            'RELATED-TO' => '*',
+            'RESOURCES' => '*',
+            'RDATE' => '*',
+        ];
+    }
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on)
+     *   2 - An inconsequential issue
+     *   3 - A severe issue.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        $result = parent::validate($options);
+        if (isset($this->DUE) && isset($this->DTSTART)) {
+            $due = $this->DUE;
+            $dtStart = $this->DTSTART;
+
+            if ($due->getValueType() !== $dtStart->getValueType()) {
+                $result[] = [
+                    'level' => 3,
+                    'message' => 'The value type (DATE or DATE-TIME) must be identical for DUE and DTSTART',
+                    'node' => $due,
+                ];
+            } elseif ($due->getDateTime() < $dtStart->getDateTime()) {
+                $result[] = [
+                    'level' => 3,
+                    'message' => 'DUE must occur after DTSTART',
+                    'node' => $due,
+                ];
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * This method should return a list of default property values.
+     *
+     * @return array
+     */
+    protected function getDefaults()
+    {
+        return [
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
+            'DTSTAMP' => date('Ymd\\THis\\Z'),
+        ];
+    }
+}
--- a/vendor/sabre/vobject/lib/DateTimeParser.php
+++ b/vendor/sabre/vobject/lib/DateTimeParser.php
@@ -0,0 +1,560 @@
+<?php
+
+namespace Sabre\VObject;
+
+use DateInterval;
+use DateTimeImmutable;
+use DateTimeZone;
+
+/**
+ * DateTimeParser.
+ *
+ * This class is responsible for parsing the several different date and time
+ * formats iCalendar and vCards have.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class DateTimeParser
+{
+    /**
+     * Parses an iCalendar (rfc5545) formatted datetime and returns a
+     * DateTimeImmutable object.
+     *
+     * Specifying a reference timezone is optional. It will only be used
+     * if the non-UTC format is used. The argument is used as a reference, the
+     * returned DateTimeImmutable object will still be in the UTC timezone.
+     *
+     * @param string       $dt
+     * @param DateTimeZone $tz
+     *
+     * @return DateTimeImmutable
+     */
+    public static function parseDateTime($dt, ?DateTimeZone $tz = null)
+    {
+        // Format is YYYYMMDD + "T" + hhmmss
+        $result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])T([0-2][0-9])([0-5][0-9])([0-5][0-9])([Z]?)$/', $dt, $matches);
+
+        if (!$result) {
+            throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: '.$dt);
+        }
+
+        if ('Z' === $matches[7] || is_null($tz)) {
+            $tz = new DateTimeZone('UTC');
+        }
+
+        try {
+            $date = new DateTimeImmutable($matches[1].'-'.$matches[2].'-'.$matches[3].' '.$matches[4].':'.$matches[5].':'.$matches[6], $tz);
+        } catch (\Exception $e) {
+            throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: '.$dt);
+        }
+
+        return $date;
+    }
+
+    /**
+     * Parses an iCalendar (rfc5545) formatted date and returns a DateTimeImmutable object.
+     *
+     * @param string       $date
+     * @param DateTimeZone $tz
+     *
+     * @return DateTimeImmutable
+     */
+    public static function parseDate($date, ?DateTimeZone $tz = null)
+    {
+        // Format is YYYYMMDD
+        $result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])$/', $date, $matches);
+
+        if (!$result) {
+            throw new InvalidDataException('The supplied iCalendar date value is incorrect: '.$date);
+        }
+
+        if (is_null($tz)) {
+            $tz = new DateTimeZone('UTC');
+        }
+
+        try {
+            $date = new DateTimeImmutable($matches[1].'-'.$matches[2].'-'.$matches[3], $tz);
+        } catch (\Exception $e) {
+            throw new InvalidDataException('The supplied iCalendar date value is incorrect: '.$date);
+        }
+
+        return $date;
+    }
+
+    /**
+     * Parses an iCalendar (RFC5545) formatted duration value.
+     *
+     * This method will either return a DateTimeInterval object, or a string
+     * suitable for strtotime or DateTime::modify.
+     *
+     * @param string $duration
+     * @param bool   $asString
+     *
+     * @return DateInterval|string
+     */
+    public static function parseDuration($duration, $asString = false)
+    {
+        $result = preg_match('/^(?<plusminus>\+|-)?P((?<week>\d+)W)?((?<day>\d+)D)?(T((?<hour>\d+)H)?((?<minute>\d+)M)?((?<second>\d+)S)?)?$/', $duration, $matches);
+        if (!$result) {
+            throw new InvalidDataException('The supplied iCalendar duration value is incorrect: '.$duration);
+        }
+
+        if (!$asString) {
+            $invert = false;
+
+            if (isset($matches['plusminus']) && '-' === $matches['plusminus']) {
+                $invert = true;
+            }
+
+            $parts = [
+                'week',
+                'day',
+                'hour',
+                'minute',
+                'second',
+            ];
+
+            foreach ($parts as $part) {
+                $matches[$part] = isset($matches[$part]) && $matches[$part] ? (int) $matches[$part] : 0;
+            }
+
+            // We need to re-construct the $duration string, because weeks and
+            // days are not supported by DateInterval in the same string.
+            $duration = 'P';
+            $days = $matches['day'];
+
+            if ($matches['week']) {
+                $days += $matches['week'] * 7;
+            }
+
+            if ($days) {
+                $duration .= $days.'D';
+            }
+
+            if ($matches['minute'] || $matches['second'] || $matches['hour']) {
+                $duration .= 'T';
+
+                if ($matches['hour']) {
+                    $duration .= $matches['hour'].'H';
+                }
+
+                if ($matches['minute']) {
+                    $duration .= $matches['minute'].'M';
+                }
+
+                if ($matches['second']) {
+                    $duration .= $matches['second'].'S';
+                }
+            }
+
+            if ('P' === $duration) {
+                $duration = 'PT0S';
+            }
+
+            $iv = new DateInterval($duration);
+
+            if ($invert) {
+                $iv->invert = true;
+            }
+
+            return $iv;
+        }
+
+        $parts = [
+            'week',
+            'day',
+            'hour',
+            'minute',
+            'second',
+        ];
+
+        $newDur = '';
+
+        foreach ($parts as $part) {
+            if (isset($matches[$part]) && $matches[$part]) {
+                $newDur .= ' '.$matches[$part].' '.$part.'s';
+            }
+        }
+
+        $newDur = ('-' === $matches['plusminus'] ? '-' : '+').trim($newDur);
+
+        if ('+' === $newDur) {
+            $newDur = '+0 seconds';
+        }
+
+        return $newDur;
+    }
+
+    /**
+     * Parses either a Date or DateTime, or Duration value.
+     *
+     * @param string              $date
+     * @param DateTimeZone|string $referenceTz
+     *
+     * @return DateTimeImmutable|DateInterval
+     */
+    public static function parse($date, $referenceTz = null)
+    {
+        if ('P' === $date[0] || ('-' === $date[0] && 'P' === $date[1])) {
+            return self::parseDuration($date);
+        } elseif (8 === strlen($date)) {
+            return self::parseDate($date, $referenceTz);
+        } else {
+            return self::parseDateTime($date, $referenceTz);
+        }
+    }
+
+    /**
+     * This method parses a vCard date and or time value.
+     *
+     * This can be used for the DATE, DATE-TIME, TIMESTAMP and
+     * DATE-AND-OR-TIME value.
+     *
+     * This method returns an array, not a DateTime value.
+     *
+     * The elements in the array are in the following order:
+     * year, month, date, hour, minute, second, timezone
+     *
+     * Almost any part of the string may be omitted. It's for example legal to
+     * just specify seconds, leave out the year, etc.
+     *
+     * Timezone is either returned as 'Z' or as '+0800'
+     *
+     * For any non-specified values null is returned.
+     *
+     * List of date formats that are supported:
+     * YYYY
+     * YYYY-MM
+     * YYYYMMDD
+     * --MMDD
+     * ---DD
+     *
+     * YYYY-MM-DD
+     * --MM-DD
+     * ---DD
+     *
+     * List of supported time formats:
+     *
+     * HH
+     * HHMM
+     * HHMMSS
+     * -MMSS
+     * --SS
+     *
+     * HH
+     * HH:MM
+     * HH:MM:SS
+     * -MM:SS
+     * --SS
+     *
+     * A full basic-format date-time string looks like :
+     * 20130603T133901
+     *
+     * A full extended-format date-time string looks like :
+     * 2013-06-03T13:39:01
+     *
+     * Times may be postfixed by a timezone offset. This can be either 'Z' for
+     * UTC, or a string like -0500 or +1100.
+     *
+     * @param string $date
+     *
+     * @return array
+     */
+    public static function parseVCardDateTime($date)
+    {
+        $regex = '/^
+            (?:  # date part
+                (?:
+                    (?: (?<year> [0-9]{4}) (?: -)?| --)
+                    (?<month> [0-9]{2})?
+                |---)
+                (?<date> [0-9]{2})?
+            )?
+            (?:T  # time part
+                (?<hour> [0-9]{2} | -)
+                (?<minute> [0-9]{2} | -)?
+                (?<second> [0-9]{2})?
+
+                (?: \.[0-9]{3})? # milliseconds
+                (?P<timezone> # timezone offset
+
+                    Z | (?: \+|-)(?: [0-9]{4})
+
+                )?
+
+            )?
+            $/x';
+
+        if (!preg_match($regex, $date, $matches)) {
+            // Attempting to parse the extended format.
+            $regex = '/^
+                (?: # date part
+                    (?: (?<year> [0-9]{4}) - | -- )
+                    (?<month> [0-9]{2}) -
+                    (?<date> [0-9]{2})
+                )?
+                (?:T # time part
+
+                    (?: (?<hour> [0-9]{2}) : | -)
+                    (?: (?<minute> [0-9]{2}) : | -)?
+                    (?<second> [0-9]{2})?
+
+                    (?: \.[0-9]{3})? # milliseconds
+                    (?P<timezone> # timezone offset
+
+                        Z | (?: \+|-)(?: [0-9]{2}:[0-9]{2})
+
+                    )?
+
+                )?
+                $/x';
+
+            if (!preg_match($regex, $date, $matches)) {
+                throw new InvalidDataException('Invalid vCard date-time string: '.$date);
+            }
+        }
+        $parts = [
+            'year',
+            'month',
+            'date',
+            'hour',
+            'minute',
+            'second',
+            'timezone',
+        ];
+
+        $result = [];
+        foreach ($parts as $part) {
+            if (empty($matches[$part])) {
+                $result[$part] = null;
+            } elseif ('-' === $matches[$part] || '--' === $matches[$part]) {
+                $result[$part] = null;
+            } else {
+                $result[$part] = $matches[$part];
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * This method parses a vCard TIME value.
+     *
+     * This method returns an array, not a DateTime value.
+     *
+     * The elements in the array are in the following order:
+     * hour, minute, second, timezone
+     *
+     * Almost any part of the string may be omitted. It's for example legal to
+     * just specify seconds, leave out the hour etc.
+     *
+     * Timezone is either returned as 'Z' or as '+08:00'
+     *
+     * For any non-specified values null is returned.
+     *
+     * List of supported time formats:
+     *
+     * HH
+     * HHMM
+     * HHMMSS
+     * -MMSS
+     * --SS
+     *
+     * HH
+     * HH:MM
+     * HH:MM:SS
+     * -MM:SS
+     * --SS
+     *
+     * A full basic-format time string looks like :
+     * 133901
+     *
+     * A full extended-format time string looks like :
+     * 13:39:01
+     *
+     * Times may be postfixed by a timezone offset. This can be either 'Z' for
+     * UTC, or a string like -0500 or +11:00.
+     *
+     * @param string $date
+     *
+     * @return array
+     */
+    public static function parseVCardTime($date)
+    {
+        $regex = '/^
+            (?<hour> [0-9]{2} | -)
+            (?<minute> [0-9]{2} | -)?
+            (?<second> [0-9]{2})?
+
+            (?: \.[0-9]{3})? # milliseconds
+            (?P<timezone> # timezone offset
+
+                Z | (?: \+|-)(?: [0-9]{4})
+
+            )?
+            $/x';
+
+        if (!preg_match($regex, $date, $matches)) {
+            // Attempting to parse the extended format.
+            $regex = '/^
+                (?: (?<hour> [0-9]{2}) : | -)
+                (?: (?<minute> [0-9]{2}) : | -)?
+                (?<second> [0-9]{2})?
+
+                (?: \.[0-9]{3})? # milliseconds
+                (?P<timezone> # timezone offset
+
+                    Z | (?: \+|-)(?: [0-9]{2}:[0-9]{2})
+
+                )?
+                $/x';
+
+            if (!preg_match($regex, $date, $matches)) {
+                throw new InvalidDataException('Invalid vCard time string: '.$date);
+            }
+        }
+        $parts = [
+            'hour',
+            'minute',
+            'second',
+            'timezone',
+        ];
+
+        $result = [];
+        foreach ($parts as $part) {
+            if (empty($matches[$part])) {
+                $result[$part] = null;
+            } elseif ('-' === $matches[$part]) {
+                $result[$part] = null;
+            } else {
+                $result[$part] = $matches[$part];
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * This method parses a vCard date and or time value.
+     *
+     * This can be used for the DATE, DATE-TIME and
+     * DATE-AND-OR-TIME value.
+     *
+     * This method returns an array, not a DateTime value.
+     * The elements in the array are in the following order:
+     *     year, month, date, hour, minute, second, timezone
+     * Almost any part of the string may be omitted. It's for example legal to
+     * just specify seconds, leave out the year, etc.
+     *
+     * Timezone is either returned as 'Z' or as '+0800'
+     *
+     * For any non-specified values null is returned.
+     *
+     * List of date formats that are supported:
+     *     20150128
+     *     2015-01
+     *     --01
+     *     --0128
+     *     ---28
+     *
+     * List of supported time formats:
+     *     13
+     *     1353
+     *     135301
+     *     -53
+     *     -5301
+     *     --01 (unreachable, see the tests)
+     *     --01Z
+     *     --01+1234
+     *
+     * List of supported date-time formats:
+     *     20150128T13
+     *     --0128T13
+     *     ---28T13
+     *     ---28T1353
+     *     ---28T135301
+     *     ---28T13Z
+     *     ---28T13+1234
+     *
+     * See the regular expressions for all the possible patterns.
+     *
+     * Times may be postfixed by a timezone offset. This can be either 'Z' for
+     * UTC, or a string like -0500 or +1100.
+     *
+     * @param string $date
+     *
+     * @return array
+     */
+    public static function parseVCardDateAndOrTime($date)
+    {
+        // \d{8}|\d{4}-\d\d|--\d\d(\d\d)?|---\d\d
+        $valueDate = '/^(?J)(?:'.
+                         '(?<year>\d{4})(?<month>\d\d)(?<date>\d\d)'.
+                         '|(?<year>\d{4})-(?<month>\d\d)'.
+                         '|--(?<month>\d\d)(?<date>\d\d)?'.
+                         '|---(?<date>\d\d)'.
+                         ')$/';
+
+        // (\d\d(\d\d(\d\d)?)?|-\d\d(\d\d)?|--\d\d)(Z|[+\-]\d\d(\d\d)?)?
+        $valueTime = '/^(?J)(?:'.
+                         '((?<hour>\d\d)((?<minute>\d\d)(?<second>\d\d)?)?'.
+                         '|-(?<minute>\d\d)(?<second>\d\d)?'.
+                         '|--(?<second>\d\d))'.
+                         '(?<timezone>(Z|[+\-]\d\d(\d\d)?))?'.
+                         ')$/';
+
+        // (\d{8}|--\d{4}|---\d\d)T\d\d(\d\d(\d\d)?)?(Z|[+\-]\d\d(\d\d?)?
+        $valueDateTime = '/^(?:'.
+                         '((?<year0>\d{4})(?<month0>\d\d)(?<date0>\d\d)'.
+                         '|--(?<month1>\d\d)(?<date1>\d\d)'.
+                         '|---(?<date2>\d\d))'.
+                         'T'.
+                         '(?<hour>\d\d)((?<minute>\d\d)(?<second>\d\d)?)?'.
+                         '(?<timezone>(Z|[+\-]\d\d(\d\d?)))?'.
+                         ')$/';
+
+        // date-and-or-time is date | date-time | time
+        // in this strict order.
+
+        if (0 === preg_match($valueDate, $date, $matches)
+            && 0 === preg_match($valueDateTime, $date, $matches)
+            && 0 === preg_match($valueTime, $date, $matches)) {
+            throw new InvalidDataException('Invalid vCard date-time string: '.$date);
+        }
+
+        $parts = [
+            'year' => null,
+            'month' => null,
+            'date' => null,
+            'hour' => null,
+            'minute' => null,
+            'second' => null,
+            'timezone' => null,
+        ];
+
+        // The $valueDateTime expression has a bug with (?J) so we simulate it.
+        $parts['date0'] = &$parts['date'];
+        $parts['date1'] = &$parts['date'];
+        $parts['date2'] = &$parts['date'];
+        $parts['month0'] = &$parts['month'];
+        $parts['month1'] = &$parts['month'];
+        $parts['year0'] = &$parts['year'];
+
+        foreach ($parts as $part => &$value) {
+            if (!empty($matches[$part])) {
+                $value = $matches[$part];
+            }
+        }
+
+        unset($parts['date0']);
+        unset($parts['date1']);
+        unset($parts['date2']);
+        unset($parts['month0']);
+        unset($parts['month1']);
+        unset($parts['year0']);
+
+        return $parts;
+    }
+}
--- a/vendor/sabre/vobject/lib/Document.php
+++ b/vendor/sabre/vobject/lib/Document.php
@@ -0,0 +1,269 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * Document.
+ *
+ * A document is just like a component, except that it's also the top level
+ * element.
+ *
+ * Both a VCALENDAR and a VCARD are considered documents.
+ *
+ * This class also provides a registry for document types.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class Document extends Component
+{
+    /**
+     * Unknown document type.
+     */
+    const UNKNOWN = 1;
+
+    /**
+     * vCalendar 1.0.
+     */
+    const VCALENDAR10 = 2;
+
+    /**
+     * iCalendar 2.0.
+     */
+    const ICALENDAR20 = 3;
+
+    /**
+     * vCard 2.1.
+     */
+    const VCARD21 = 4;
+
+    /**
+     * vCard 3.0.
+     */
+    const VCARD30 = 5;
+
+    /**
+     * vCard 4.0.
+     */
+    const VCARD40 = 6;
+
+    /**
+     * The default name for this component.
+     *
+     * This should be 'VCALENDAR' or 'VCARD'.
+     *
+     * @var string
+     */
+    public static $defaultName;
+
+    /**
+     * List of properties, and which classes they map to.
+     *
+     * @var array
+     */
+    public static $propertyMap = [];
+
+    /**
+     * List of components, along with which classes they map to.
+     *
+     * @var array
+     */
+    public static $componentMap = [];
+
+    /**
+     * List of value-types, and which classes they map to.
+     *
+     * @var array
+     */
+    public static $valueMap = [];
+
+    /**
+     * Creates a new document.
+     *
+     * We're changing the default behavior slightly here. First, we don't want
+     * to have to specify a name (we already know it), and we want to allow
+     * children to be specified in the first argument.
+     *
+     * But, the default behavior also works.
+     *
+     * So the two sigs:
+     *
+     * new Document(array $children = [], $defaults = true);
+     * new Document(string $name, array $children = [], $defaults = true)
+     */
+    public function __construct()
+    {
+        $args = func_get_args();
+        $name = static::$defaultName;
+        if (0 === count($args) || is_array($args[0])) {
+            $children = isset($args[0]) ? $args[0] : [];
+            $defaults = isset($args[1]) ? $args[1] : true;
+        } else {
+            $name = $args[0];
+            $children = isset($args[1]) ? $args[1] : [];
+            $defaults = isset($args[2]) ? $args[2] : true;
+        }
+        parent::__construct($this, $name, $children, $defaults);
+    }
+
+    /**
+     * Returns the current document type.
+     *
+     * @return int
+     */
+    public function getDocumentType()
+    {
+        return self::UNKNOWN;
+    }
+
+    /**
+     * Creates a new component or property.
+     *
+     * If it's a known component, we will automatically call createComponent.
+     * otherwise, we'll assume it's a property and call createProperty instead.
+     *
+     * @param string $name
+     * @param string $arg1,... Unlimited number of args
+     *
+     * @return mixed
+     */
+    public function create($name)
+    {
+        if (isset(static::$componentMap[strtoupper($name)])) {
+            return call_user_func_array([$this, 'createComponent'], func_get_args());
+        } else {
+            return call_user_func_array([$this, 'createProperty'], func_get_args());
+        }
+    }
+
+    /**
+     * Creates a new component.
+     *
+     * This method automatically searches for the correct component class, based
+     * on its name.
+     *
+     * You can specify the children either in key=>value syntax, in which case
+     * properties will automatically be created, or you can just pass a list of
+     * Component and Property object.
+     *
+     * By default, a set of sensible values will be added to the component. For
+     * an iCalendar object, this may be something like CALSCALE:GREGORIAN. To
+     * ensure that this does not happen, set $defaults to false.
+     *
+     * @param string $name
+     * @param array  $children
+     * @param bool   $defaults
+     *
+     * @return Component
+     */
+    public function createComponent($name, ?array $children = null, $defaults = true)
+    {
+        $name = strtoupper($name);
+        $class = Component::class;
+
+        if (isset(static::$componentMap[$name])) {
+            $class = static::$componentMap[$name];
+        }
+        if (is_null($children)) {
+            $children = [];
+        }
+
+        return new $class($this, $name, $children, $defaults);
+    }
+
+    /**
+     * Factory method for creating new properties.
+     *
+     * This method automatically searches for the correct property class, based
+     * on its name.
+     *
+     * You can specify the parameters either in key=>value syntax, in which case
+     * parameters will automatically be created, or you can just pass a list of
+     * Parameter objects.
+     *
+     * @param string $name
+     * @param mixed  $value
+     * @param array  $parameters
+     * @param string $valueType  Force a specific valuetype, such as URI or TEXT
+     */
+    public function createProperty($name, $value = null, ?array $parameters = null, $valueType = null, ?int $lineIndex = null, ?string $lineString = null): Property
+    {
+        // If there's a . in the name, it means it's prefixed by a groupname.
+        if (false !== ($i = strpos($name, '.'))) {
+            $group = substr($name, 0, $i);
+            $name = strtoupper(substr($name, $i + 1));
+        } else {
+            $name = strtoupper($name);
+            $group = null;
+        }
+
+        $class = null;
+
+        // If a VALUE parameter is supplied, we have to use that
+        // According to https://datatracker.ietf.org/doc/html/rfc5545#section-3.2.20
+        //  If the property's value is the default value type, then this
+        //  parameter need not be specified.  However, if the property's
+        //  default value type is overridden by some other allowable value
+        //  type, then this parameter MUST be specified.
+        if (!$valueType) {
+            $valueType = $parameters['VALUE'] ?? null;
+        }
+
+        if ($valueType) {
+            // The valueType argument comes first to figure out the correct
+            // class.
+            $class = $this->getClassNameForPropertyValue($valueType);
+        }
+
+        // If the value parameter is not set or set to something we do not recognize
+        // we do not attempt to interpret or parse the datass value as specified in
+        // https://datatracker.ietf.org/doc/html/rfc5545#section-3.2.20
+        // So when we so far did not get a class-name, we use the default for the property
+        if (is_null($class)) {
+            $class = $this->getClassNameForPropertyName($name);
+        }
+
+        if (is_null($parameters)) {
+            $parameters = [];
+        }
+
+        return new $class($this, $name, $value, $parameters, $group, $lineIndex, $lineString);
+    }
+
+    /**
+     * This method returns a full class-name for a value parameter.
+     *
+     * For instance, DTSTART may have VALUE=DATE. In that case we will look in
+     * our valueMap table and return the appropriate class name.
+     *
+     * This method returns null if we don't have a specialized class.
+     *
+     * @param string $valueParam
+     *
+     * @return string|null
+     */
+    public function getClassNameForPropertyValue($valueParam)
+    {
+        $valueParam = strtoupper($valueParam);
+        if (isset(static::$valueMap[$valueParam])) {
+            return static::$valueMap[$valueParam];
+        }
+    }
+
+    /**
+     * Returns the default class for a property name.
+     *
+     * @param string $propertyName
+     *
+     * @return string
+     */
+    public function getClassNameForPropertyName($propertyName)
+    {
+        if (isset(static::$propertyMap[$propertyName])) {
+            return static::$propertyMap[$propertyName];
+        } else {
+            return Property\Unknown::class;
+        }
+    }
+}
--- a/vendor/sabre/vobject/lib/ElementList.php
+++ b/vendor/sabre/vobject/lib/ElementList.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Sabre\VObject;
+
+use ArrayIterator;
+use LogicException;
+
+/**
+ * VObject ElementList.
+ *
+ * This class represents a list of elements. Lists are the result of queries,
+ * such as doing $vcalendar->vevent where there's multiple VEVENT objects.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ElementList extends ArrayIterator
+{
+    /* {{{ ArrayAccess Interface */
+
+    /**
+     * Sets an item through ArrayAccess.
+     *
+     * @param int   $offset
+     * @param mixed $value
+     *
+     * @return void
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetSet($offset, $value)
+    {
+        throw new LogicException('You can not add new objects to an ElementList');
+    }
+
+    /**
+     * Sets an item through ArrayAccess.
+     *
+     * This method just forwards the request to the inner iterator
+     *
+     * @param int $offset
+     *
+     * @return void
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetUnset($offset)
+    {
+        throw new LogicException('You can not remove objects from an ElementList');
+    }
+
+    /* }}} */
+}
--- a/vendor/sabre/vobject/lib/EofException.php
+++ b/vendor/sabre/vobject/lib/EofException.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * Exception thrown by parser when the end of the stream has been reached,
+ * before this was expected.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class EofException extends ParseException
+{
+}
--- a/vendor/sabre/vobject/lib/FreeBusyData.php
+++ b/vendor/sabre/vobject/lib/FreeBusyData.php
@@ -0,0 +1,185 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * FreeBusyData is a helper class that manages freebusy information.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class FreeBusyData
+{
+    /**
+     * Start timestamp.
+     *
+     * @var int
+     */
+    protected $start;
+
+    /**
+     * End timestamp.
+     *
+     * @var int
+     */
+    protected $end;
+
+    /**
+     * A list of free-busy times.
+     *
+     * @var array
+     */
+    protected $data;
+
+    public function __construct($start, $end)
+    {
+        $this->start = $start;
+        $this->end = $end;
+        $this->data = [];
+
+        $this->data[] = [
+            'start' => $this->start,
+            'end' => $this->end,
+            'type' => 'FREE',
+        ];
+    }
+
+    /**
+     * Adds free or busytime to the data.
+     *
+     * @param int    $start
+     * @param int    $end
+     * @param string $type  FREE, BUSY, BUSY-UNAVAILABLE or BUSY-TENTATIVE
+     */
+    public function add($start, $end, $type)
+    {
+        if ($start > $this->end || $end < $this->start) {
+            // This new data is outside our timerange.
+            return;
+        }
+
+        if ($start < $this->start) {
+            // The item starts before our requested time range
+            $start = $this->start;
+        }
+        if ($end > $this->end) {
+            // The item ends after our requested time range
+            $end = $this->end;
+        }
+
+        // Finding out where we need to insert the new item.
+        $currentIndex = 0;
+        while ($start > $this->data[$currentIndex]['end']) {
+            ++$currentIndex;
+        }
+
+        // The standard insertion point will be one _after_ the first
+        // overlapping item.
+        $insertStartIndex = $currentIndex + 1;
+
+        $newItem = [
+            'start' => $start,
+            'end' => $end,
+            'type' => $type,
+        ];
+
+        $precedingItem = $this->data[$insertStartIndex - 1];
+        if ($this->data[$insertStartIndex - 1]['start'] === $start) {
+            // The old item starts at the exact same point as the new item.
+            --$insertStartIndex;
+        }
+
+        // Now we know where to insert the item, we need to know where it
+        // starts overlapping with items on the tail end. We need to start
+        // looking one item before the insertStartIndex, because it's possible
+        // that the new item 'sits inside' the previous old item.
+        if ($insertStartIndex > 0) {
+            $currentIndex = $insertStartIndex - 1;
+        } else {
+            $currentIndex = 0;
+        }
+
+        while ($end > $this->data[$currentIndex]['end']) {
+            ++$currentIndex;
+        }
+
+        // What we are about to insert into the array
+        $newItems = [
+            $newItem,
+        ];
+
+        // This is the amount of items that are completely overwritten by the
+        // new item.
+        $itemsToDelete = $currentIndex - $insertStartIndex;
+        if ($this->data[$currentIndex]['end'] <= $end) {
+            ++$itemsToDelete;
+        }
+
+        // If itemsToDelete was -1, it means that the newly inserted item is
+        // actually sitting inside an existing one. This means we need to split
+        // the item at the current position in two and insert the new item in
+        // between.
+        if (-1 === $itemsToDelete) {
+            $itemsToDelete = 0;
+            if ($newItem['end'] < $precedingItem['end']) {
+                $newItems[] = [
+                    'start' => $newItem['end'] + 1,
+                    'end' => $precedingItem['end'],
+                    'type' => $precedingItem['type'],
+                ];
+            }
+        }
+
+        array_splice(
+            $this->data,
+            $insertStartIndex,
+            $itemsToDelete,
+            $newItems
+        );
+
+        $doMerge = false;
+        $mergeOffset = $insertStartIndex;
+        $mergeItem = $newItem;
+        $mergeDelete = 1;
+
+        if (isset($this->data[$insertStartIndex - 1])) {
+            // Updating the start time of the previous item.
+            $this->data[$insertStartIndex - 1]['end'] = $start;
+
+            // If the previous and the current are of the same type, we can
+            // merge them into one item.
+            if ($this->data[$insertStartIndex - 1]['type'] === $this->data[$insertStartIndex]['type']) {
+                $doMerge = true;
+                --$mergeOffset;
+                ++$mergeDelete;
+                $mergeItem['start'] = $this->data[$insertStartIndex - 1]['start'];
+            }
+        }
+        if (isset($this->data[$insertStartIndex + 1])) {
+            // Updating the start time of the next item.
+            $this->data[$insertStartIndex + 1]['start'] = $end;
+
+            // If the next and the current are of the same type, we can
+            // merge them into one item.
+            if ($this->data[$insertStartIndex + 1]['type'] === $this->data[$insertStartIndex]['type']) {
+                $doMerge = true;
+                ++$mergeDelete;
+                $mergeItem['end'] = $this->data[$insertStartIndex + 1]['end'];
+            }
+        }
+        if ($doMerge) {
+            array_splice(
+                $this->data,
+                $mergeOffset,
+                $mergeDelete,
+                [$mergeItem]
+            );
+        }
+    }
+
+    public function getData()
+    {
+        return $this->data;
+    }
+}
--- a/vendor/sabre/vobject/lib/FreeBusyGenerator.php
+++ b/vendor/sabre/vobject/lib/FreeBusyGenerator.php
@@ -0,0 +1,549 @@
+<?php
+
+namespace Sabre\VObject;
+
+use DateTimeImmutable;
+use DateTimeInterface;
+use DateTimeZone;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Recur\EventIterator;
+use Sabre\VObject\Recur\NoInstancesException;
+
+/**
+ * This class helps with generating FREEBUSY reports based on existing sets of
+ * objects.
+ *
+ * It only looks at VEVENT and VFREEBUSY objects from the sourcedata, and
+ * generates a single VFREEBUSY object.
+ *
+ * VFREEBUSY components are described in RFC5545, The rules for what should
+ * go in a single freebusy report is taken from RFC4791, section 7.10.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class FreeBusyGenerator
+{
+    /**
+     * Input objects.
+     *
+     * @var array
+     */
+    protected $objects = [];
+
+    /**
+     * Start of range.
+     *
+     * @var DateTimeInterface|null
+     */
+    protected $start;
+
+    /**
+     * End of range.
+     *
+     * @var DateTimeInterface|null
+     */
+    protected $end;
+
+    /**
+     * VCALENDAR object.
+     *
+     * @var Document
+     */
+    protected $baseObject;
+
+    /**
+     * Reference timezone.
+     *
+     * When we are calculating busy times, and we come across so-called
+     * floating times (times without a timezone), we use the reference timezone
+     * instead.
+     *
+     * This is also used for all-day events.
+     *
+     * This defaults to UTC.
+     *
+     * @var DateTimeZone
+     */
+    protected $timeZone;
+
+    /**
+     * A VAVAILABILITY document.
+     *
+     * If this is set, its information will be included when calculating
+     * freebusy time.
+     *
+     * @var Document
+     */
+    protected $vavailability;
+
+    /**
+     * Creates the generator.
+     *
+     * Check the setTimeRange and setObjects methods for details about the
+     * arguments.
+     *
+     * @param DateTimeInterface $start
+     * @param DateTimeInterface $end
+     * @param mixed             $objects
+     * @param DateTimeZone      $timeZone
+     */
+    public function __construct(?DateTimeInterface $start = null, ?DateTimeInterface $end = null, $objects = null, ?DateTimeZone $timeZone = null)
+    {
+        $this->setTimeRange($start, $end);
+
+        if ($objects) {
+            $this->setObjects($objects);
+        }
+        if (is_null($timeZone)) {
+            $timeZone = new DateTimeZone('UTC');
+        }
+        $this->setTimeZone($timeZone);
+    }
+
+    /**
+     * Sets the VCALENDAR object.
+     *
+     * If this is set, it will not be generated for you. You are responsible
+     * for setting things like the METHOD, CALSCALE, VERSION, etc..
+     *
+     * The VFREEBUSY object will be automatically added though.
+     */
+    public function setBaseObject(Document $vcalendar)
+    {
+        $this->baseObject = $vcalendar;
+    }
+
+    /**
+     * Sets a VAVAILABILITY document.
+     */
+    public function setVAvailability(Document $vcalendar)
+    {
+        $this->vavailability = $vcalendar;
+    }
+
+    /**
+     * Sets the input objects.
+     *
+     * You must either specify a vcalendar object as a string, or as the parse
+     * Component.
+     * It's also possible to specify multiple objects as an array.
+     *
+     * @param mixed $objects
+     */
+    public function setObjects($objects)
+    {
+        if (!is_array($objects)) {
+            $objects = [$objects];
+        }
+
+        $this->objects = [];
+        foreach ($objects as $object) {
+            if (is_string($object) || is_resource($object)) {
+                $this->objects[] = Reader::read($object);
+            } elseif ($object instanceof Component) {
+                $this->objects[] = $object;
+            } else {
+                throw new \InvalidArgumentException('You can only pass strings or \\Sabre\\VObject\\Component arguments to setObjects');
+            }
+        }
+    }
+
+    /**
+     * Sets the time range.
+     *
+     * Any freebusy object falling outside of this time range will be ignored.
+     *
+     * @param DateTimeInterface $start
+     * @param DateTimeInterface $end
+     */
+    public function setTimeRange(?DateTimeInterface $start = null, ?DateTimeInterface $end = null)
+    {
+        if (!$start) {
+            $start = new DateTimeImmutable(Settings::$minDate);
+        }
+        if (!$end) {
+            $end = new DateTimeImmutable(Settings::$maxDate);
+        }
+        $this->start = $start;
+        $this->end = $end;
+    }
+
+    /**
+     * Sets the reference timezone for floating times.
+     */
+    public function setTimeZone(DateTimeZone $timeZone)
+    {
+        $this->timeZone = $timeZone;
+    }
+
+    /**
+     * Parses the input data and returns a correct VFREEBUSY object, wrapped in
+     * a VCALENDAR.
+     *
+     * @return Component
+     */
+    public function getResult()
+    {
+        $fbData = new FreeBusyData(
+            $this->start->getTimeStamp(),
+            $this->end->getTimeStamp()
+        );
+        if ($this->vavailability) {
+            $this->calculateAvailability($fbData, $this->vavailability);
+        }
+
+        $this->calculateBusy($fbData, $this->objects);
+
+        return $this->generateFreeBusyCalendar($fbData);
+    }
+
+    /**
+     * This method takes a VAVAILABILITY component and figures out all the
+     * available times.
+     */
+    protected function calculateAvailability(FreeBusyData $fbData, VCalendar $vavailability)
+    {
+        $vavailComps = iterator_to_array($vavailability->VAVAILABILITY);
+        usort(
+            $vavailComps,
+            function ($a, $b) {
+                // We need to order the components by priority. Priority 1
+                // comes first, up until priority 9. Priority 0 comes after
+                // priority 9. No priority implies priority 0.
+                //
+                // Yes, I'm serious.
+                $priorityA = isset($a->PRIORITY) ? (int) $a->PRIORITY->getValue() : 0;
+                $priorityB = isset($b->PRIORITY) ? (int) $b->PRIORITY->getValue() : 0;
+
+                if (0 === $priorityA) {
+                    $priorityA = 10;
+                }
+                if (0 === $priorityB) {
+                    $priorityB = 10;
+                }
+
+                return $priorityA - $priorityB;
+            }
+        );
+
+        // Now we go over all the VAVAILABILITY components and figure if
+        // there's any we don't need to consider.
+        //
+        // This is can be because of one of two reasons: either the
+        // VAVAILABILITY component falls outside the time we are interested in,
+        // or a different VAVAILABILITY component with a higher priority has
+        // already completely covered the time-range.
+        $old = $vavailComps;
+        $new = [];
+
+        foreach ($old as $vavail) {
+            list($compStart, $compEnd) = $vavail->getEffectiveStartEnd();
+
+            // We don't care about datetimes that are earlier or later than the
+            // start and end of the freebusy report, so this gets normalized
+            // first.
+            if (is_null($compStart) || $compStart < $this->start) {
+                $compStart = $this->start;
+            }
+            if (is_null($compEnd) || $compEnd > $this->end) {
+                $compEnd = $this->end;
+            }
+
+            // If the item fell out of the timerange, we can just skip it.
+            if ($compStart > $this->end || $compEnd < $this->start) {
+                continue;
+            }
+
+            // Going through our existing list of components to see if there's
+            // a higher priority component that already fully covers this one.
+            foreach ($new as $higherVavail) {
+                list($higherStart, $higherEnd) = $higherVavail->getEffectiveStartEnd();
+                if (
+                    (is_null($higherStart) || $higherStart < $compStart) &&
+                    (is_null($higherEnd) || $higherEnd > $compEnd)
+                ) {
+                    // Component is fully covered by a higher priority
+                    // component. We can skip this component.
+                    continue 2;
+                }
+            }
+
+            // We're keeping it!
+            $new[] = $vavail;
+        }
+
+        // Lastly, we need to traverse the remaining components and fill in the
+        // freebusydata slots.
+        //
+        // We traverse the components in reverse, because we want the higher
+        // priority components to override the lower ones.
+        foreach (array_reverse($new) as $vavail) {
+            $busyType = isset($vavail->BUSYTYPE) ? strtoupper($vavail->BUSYTYPE) : 'BUSY-UNAVAILABLE';
+            list($vavailStart, $vavailEnd) = $vavail->getEffectiveStartEnd();
+
+            // Making the component size no larger than the requested free-busy
+            // report range.
+            if (!$vavailStart || $vavailStart < $this->start) {
+                $vavailStart = $this->start;
+            }
+            if (!$vavailEnd || $vavailEnd > $this->end) {
+                $vavailEnd = $this->end;
+            }
+
+            // Marking the entire time range of the VAVAILABILITY component as
+            // busy.
+            $fbData->add(
+                $vavailStart->getTimeStamp(),
+                $vavailEnd->getTimeStamp(),
+                $busyType
+            );
+
+            // Looping over the AVAILABLE components.
+            if (isset($vavail->AVAILABLE)) {
+                foreach ($vavail->AVAILABLE as $available) {
+                    list($availStart, $availEnd) = $available->getEffectiveStartEnd();
+                    $fbData->add(
+                    $availStart->getTimeStamp(),
+                    $availEnd->getTimeStamp(),
+                    'FREE'
+                );
+
+                    if ($available->RRULE) {
+                        // Our favourite thing: recurrence!!
+
+                        $rruleIterator = new Recur\RRuleIterator(
+                        $available->RRULE->getValue(),
+                        $availStart
+                    );
+                        $rruleIterator->fastForward($vavailStart);
+
+                        $startEndDiff = $availStart->diff($availEnd);
+
+                        while ($rruleIterator->valid()) {
+                            $recurStart = $rruleIterator->current();
+                            $recurEnd = $recurStart->add($startEndDiff);
+
+                            if ($recurStart > $vavailEnd) {
+                                // We're beyond the legal timerange.
+                                break;
+                            }
+
+                            if ($recurEnd > $vavailEnd) {
+                                // Truncating the end if it exceeds the
+                                // VAVAILABILITY end.
+                                $recurEnd = $vavailEnd;
+                            }
+
+                            $fbData->add(
+                            $recurStart->getTimeStamp(),
+                            $recurEnd->getTimeStamp(),
+                            'FREE'
+                        );
+
+                            $rruleIterator->next();
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * This method takes an array of iCalendar objects and applies its busy
+     * times on fbData.
+     *
+     * @param VCalendar[] $objects
+     */
+    protected function calculateBusy(FreeBusyData $fbData, array $objects)
+    {
+        foreach ($objects as $key => $object) {
+            foreach ($object->getBaseComponents() as $component) {
+                switch ($component->name) {
+                    case 'VEVENT':
+                        $FBTYPE = 'BUSY';
+                        if (isset($component->TRANSP) && ('TRANSPARENT' === strtoupper($component->TRANSP))) {
+                            break;
+                        }
+                        if (isset($component->STATUS)) {
+                            $status = strtoupper($component->STATUS);
+                            if ('CANCELLED' === $status) {
+                                break;
+                            }
+                            if ('TENTATIVE' === $status) {
+                                $FBTYPE = 'BUSY-TENTATIVE';
+                            }
+                        }
+
+                        $times = [];
+
+                        if ($component->RRULE) {
+                            try {
+                                $iterator = new EventIterator($object, (string) $component->UID, $this->timeZone);
+                            } catch (NoInstancesException $e) {
+                                // This event is recurring, but it doesn't have a single
+                                // instance. We are skipping this event from the output
+                                // entirely.
+                                unset($this->objects[$key]);
+                                break;
+                            }
+
+                            if ($this->start) {
+                                $iterator->fastForward($this->start);
+                            }
+
+                            $maxRecurrences = Settings::$maxRecurrences;
+
+                            while ($iterator->valid() && --$maxRecurrences) {
+                                $startTime = $iterator->getDTStart();
+                                if ($this->end && $startTime > $this->end) {
+                                    break;
+                                }
+                                $times[] = [
+                                    $iterator->getDTStart(),
+                                    $iterator->getDTEnd(),
+                                ];
+
+                                $iterator->next();
+                            }
+                        } else {
+                            $startTime = $component->DTSTART->getDateTime($this->timeZone);
+                            if ($this->end && $startTime > $this->end) {
+                                break;
+                            }
+                            $endTime = null;
+                            if (isset($component->DTEND)) {
+                                $endTime = $component->DTEND->getDateTime($this->timeZone);
+                            } elseif (isset($component->DURATION)) {
+                                $duration = DateTimeParser::parseDuration((string) $component->DURATION);
+                                $endTime = clone $startTime;
+                                $endTime = $endTime->add($duration);
+                            } elseif (!$component->DTSTART->hasTime()) {
+                                $endTime = clone $startTime;
+                                $endTime = $endTime->modify('+1 day');
+                            } else {
+                                // The event had no duration (0 seconds)
+                                break;
+                            }
+
+                            $times[] = [$startTime, $endTime];
+                        }
+
+                        foreach ($times as $time) {
+                            if ($this->end && $time[0] > $this->end) {
+                                break;
+                            }
+                            if ($this->start && $time[1] < $this->start) {
+                                break;
+                            }
+
+                            $fbData->add(
+                                $time[0]->getTimeStamp(),
+                                $time[1]->getTimeStamp(),
+                                $FBTYPE
+                            );
+                        }
+                        break;
+
+                    case 'VFREEBUSY':
+                        foreach ($component->FREEBUSY as $freebusy) {
+                            $fbType = isset($freebusy['FBTYPE']) ? strtoupper($freebusy['FBTYPE']) : 'BUSY';
+
+                            // Skipping intervals marked as 'free'
+                            if ('FREE' === $fbType) {
+                                continue;
+                            }
+
+                            $values = explode(',', $freebusy);
+                            foreach ($values as $value) {
+                                list($startTime, $endTime) = explode('/', $value);
+                                $startTime = DateTimeParser::parseDateTime($startTime);
+
+                                if ('P' === substr($endTime, 0, 1) || '-P' === substr($endTime, 0, 2)) {
+                                    $duration = DateTimeParser::parseDuration($endTime);
+                                    $endTime = clone $startTime;
+                                    $endTime = $endTime->add($duration);
+                                } else {
+                                    $endTime = DateTimeParser::parseDateTime($endTime);
+                                }
+
+                                if ($this->start && $this->start > $endTime) {
+                                    continue;
+                                }
+                                if ($this->end && $this->end < $startTime) {
+                                    continue;
+                                }
+                                $fbData->add(
+                                    $startTime->getTimeStamp(),
+                                    $endTime->getTimeStamp(),
+                                    $fbType
+                                );
+                            }
+                        }
+                        break;
+                }
+            }
+        }
+    }
+
+    /**
+     * This method takes a FreeBusyData object and generates the VCALENDAR
+     * object associated with it.
+     *
+     * @return VCalendar
+     */
+    protected function generateFreeBusyCalendar(FreeBusyData $fbData)
+    {
+        if ($this->baseObject) {
+            $calendar = $this->baseObject;
+        } else {
+            $calendar = new VCalendar();
+        }
+
+        $vfreebusy = $calendar->createComponent('VFREEBUSY');
+        $calendar->add($vfreebusy);
+
+        if ($this->start) {
+            $dtstart = $calendar->createProperty('DTSTART');
+            $dtstart->setDateTime($this->start);
+            $vfreebusy->add($dtstart);
+        }
+        if ($this->end) {
+            $dtend = $calendar->createProperty('DTEND');
+            $dtend->setDateTime($this->end);
+            $vfreebusy->add($dtend);
+        }
+
+        $tz = new \DateTimeZone('UTC');
+        $dtstamp = $calendar->createProperty('DTSTAMP');
+        $dtstamp->setDateTime(new DateTimeImmutable('now', $tz));
+        $vfreebusy->add($dtstamp);
+
+        foreach ($fbData->getData() as $busyTime) {
+            $busyType = strtoupper($busyTime['type']);
+
+            // Ignoring all the FREE parts, because those are already assumed.
+            if ('FREE' === $busyType) {
+                continue;
+            }
+
+            $busyTime[0] = new \DateTimeImmutable('@'.$busyTime['start'], $tz);
+            $busyTime[1] = new \DateTimeImmutable('@'.$busyTime['end'], $tz);
+
+            $prop = $calendar->createProperty(
+                'FREEBUSY',
+                $busyTime[0]->format('Ymd\\THis\\Z').'/'.$busyTime[1]->format('Ymd\\THis\\Z')
+            );
+
+            // Only setting FBTYPE if it's not BUSY, because BUSY is the
+            // default anyway.
+            if ('BUSY' !== $busyType) {
+                $prop['FBTYPE'] = $busyType;
+            }
+            $vfreebusy->add($prop);
+        }
+
+        return $calendar;
+    }
+}
--- a/vendor/sabre/vobject/lib/ITip/Broker.php
+++ b/vendor/sabre/vobject/lib/ITip/Broker.php
--- a/vendor/sabre/vobject/lib/ITip/ITipException.php
+++ b/vendor/sabre/vobject/lib/ITip/ITipException.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Sabre\VObject\ITip;
+
+use Exception;
+
+/**
+ * This message is emitted in case of serious problems with iTip messages.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ITipException extends Exception
+{
+}
--- a/vendor/sabre/vobject/lib/ITip/Message.php
+++ b/vendor/sabre/vobject/lib/ITip/Message.php
@@ -0,0 +1,136 @@
+<?php
+
+namespace Sabre\VObject\ITip;
+
+/**
+ * This class represents an iTip message.
+ *
+ * A message holds all the information relevant to the message, including the
+ * object itself.
+ *
+ * It should for the most part be treated as immutable.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Message
+{
+    /**
+     * The object's UID.
+     *
+     * @var string
+     */
+    public $uid;
+
+    /**
+     * The component type, such as VEVENT.
+     *
+     * @var string
+     */
+    public $component;
+
+    /**
+     * Contains the ITip method, which is something like REQUEST, REPLY or
+     * CANCEL.
+     *
+     * @var string
+     */
+    public $method;
+
+    /**
+     * The current sequence number for the event.
+     *
+     * @var int
+     */
+    public $sequence;
+
+    /**
+     * The senders' email address.
+     *
+     * Note that this does not imply that this has to be used in a From: field
+     * if the message is sent by email. It may also be populated in Reply-To:
+     * or not at all.
+     *
+     * @var string
+     */
+    public $sender;
+
+    /**
+     * The name of the sender. This is often populated from a CN parameter from
+     * either the ORGANIZER or ATTENDEE, depending on the message.
+     *
+     * @var string|null
+     */
+    public $senderName;
+
+    /**
+     * The recipient's email address.
+     *
+     * @var string
+     */
+    public $recipient;
+
+    /**
+     * The name of the recipient. This is usually populated with the CN
+     * parameter from the ATTENDEE or ORGANIZER property, if it's available.
+     *
+     * @var string|null
+     */
+    public $recipientName;
+
+    /**
+     * After the message has been delivered, this should contain a string such
+     * as : 1.1;Sent or 1.2;Delivered.
+     *
+     * In case of a failure, this will hold the error status code.
+     *
+     * See:
+     * http://tools.ietf.org/html/rfc6638#section-7.3
+     *
+     * @var string
+     */
+    public $scheduleStatus;
+
+    /**
+     * The iCalendar / iTip body.
+     *
+     * @var \Sabre\VObject\Component\VCalendar
+     */
+    public $message;
+
+    /**
+     * This will be set to true, if the iTip broker considers the change
+     * 'significant'.
+     *
+     * In practice, this means that we'll only mark it true, if for instance
+     * DTSTART changed. This allows systems to only send iTip messages when
+     * significant changes happened. This is especially useful for iMip, as
+     * normally a ton of messages may be generated for normal calendar use.
+     *
+     * To see the list of properties that are considered 'significant', check
+     * out Sabre\VObject\ITip\Broker::$significantChangeProperties.
+     *
+     * @var bool
+     */
+    public $significantChange = true;
+
+    /**
+     * Returns the schedule status as a string.
+     *
+     * For example:
+     * 1.2
+     *
+     * @return mixed bool|string
+     */
+    public function getScheduleStatus()
+    {
+        if (!$this->scheduleStatus) {
+            return false;
+        } else {
+            list($scheduleStatus) = explode(';', $this->scheduleStatus);
+
+            return $scheduleStatus;
+        }
+    }
+}
--- a/vendor/sabre/vobject/lib/ITip/SameOrganizerForAllComponentsException.php
+++ b/vendor/sabre/vobject/lib/ITip/SameOrganizerForAllComponentsException.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Sabre\VObject\ITip;
+
+/**
+ * SameOrganizerForAllComponentsException.
+ *
+ * This exception is emitted when an event is encountered with more than one
+ * component (e.g.: exceptions), but the organizer is not identical in every
+ * component.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class SameOrganizerForAllComponentsException extends ITipException
+{
+}
--- a/vendor/sabre/vobject/lib/InvalidDataException.php
+++ b/vendor/sabre/vobject/lib/InvalidDataException.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * This exception is thrown whenever an invalid value is found anywhere in a
+ * iCalendar or vCard object.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class InvalidDataException extends \Exception
+{
+}
--- a/vendor/sabre/vobject/lib/Node.php
+++ b/vendor/sabre/vobject/lib/Node.php
@@ -0,0 +1,256 @@
+<?php
+
+namespace Sabre\VObject;
+
+use Sabre\Xml;
+
+/**
+ * A node is the root class for every element in an iCalendar of vCard object.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable, \JsonSerializable, Xml\XmlSerializable
+{
+    /**
+     * The following constants are used by the validate() method.
+     *
+     * If REPAIR is set, the validator will attempt to repair any broken data
+     * (if possible).
+     */
+    const REPAIR = 1;
+
+    /**
+     * If this option is set, the validator will operate on the vcards on the
+     * assumption that the vcards need to be valid for CardDAV.
+     *
+     * This means for example that the UID is required, whereas it is not for
+     * regular vcards.
+     */
+    const PROFILE_CARDDAV = 2;
+
+    /**
+     * If this option is set, the validator will operate on iCalendar objects
+     * on the assumption that the vcards need to be valid for CalDAV.
+     *
+     * This means for example that calendars can only contain objects with
+     * identical component types and UIDs.
+     */
+    const PROFILE_CALDAV = 4;
+
+    /**
+     * Reference to the parent object, if this is not the top object.
+     *
+     * @var Node
+     */
+    public $parent;
+
+    /**
+     * Iterator override.
+     *
+     * @var ElementList
+     */
+    protected $iterator = null;
+
+    /**
+     * The root document.
+     *
+     * @var Component
+     */
+    protected $root;
+
+    /**
+     * Serializes the node into a mimedir format.
+     *
+     * @return string
+     */
+    abstract public function serialize();
+
+    /**
+     * This method returns an array, with the representation as it should be
+     * encoded in JSON. This is used to create jCard or jCal documents.
+     *
+     * @return array
+     */
+    #[\ReturnTypeWillChange]
+    abstract public function jsonSerialize();
+
+    /**
+     * This method serializes the data into XML. This is used to create xCard or
+     * xCal documents.
+     *
+     * @param Xml\Writer $writer XML writer
+     */
+    abstract public function xmlSerialize(Xml\Writer $writer): void;
+
+    /**
+     * Call this method on a document if you're done using it.
+     *
+     * It's intended to remove all circular references, so PHP can easily clean
+     * it up.
+     */
+    public function destroy()
+    {
+        $this->parent = null;
+        $this->root = null;
+    }
+
+    /* {{{ IteratorAggregator interface */
+
+    /**
+     * Returns the iterator for this object.
+     *
+     * @return ElementList
+     */
+    #[\ReturnTypeWillChange]
+    public function getIterator()
+    {
+        if (!is_null($this->iterator)) {
+            return $this->iterator;
+        }
+
+        return new ElementList([$this]);
+    }
+
+    /**
+     * Sets the overridden iterator.
+     *
+     * Note that this is not actually part of the iterator interface
+     */
+    public function setIterator(ElementList $iterator)
+    {
+        $this->iterator = $iterator;
+    }
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   Node::REPAIR - May attempt to automatically repair the problem.
+     *
+     * This method returns an array with detected problems.
+     * Every element has the following properties:
+     *
+     *  * level - problem level.
+     *  * message - A human-readable string describing the issue.
+     *  * node - A reference to the problematic node.
+     *
+     * The level means:
+     *   1 - The issue was repaired (only happens if REPAIR was turned on)
+     *   2 - An inconsequential issue
+     *   3 - A severe issue.
+     *
+     * @param int $options
+     *
+     * @return array
+     */
+    public function validate($options = 0)
+    {
+        return [];
+    }
+
+    /* }}} */
+
+    /* {{{ Countable interface */
+
+    /**
+     * Returns the number of elements.
+     *
+     * @return int
+     */
+    #[\ReturnTypeWillChange]
+    public function count()
+    {
+        $it = $this->getIterator();
+
+        return $it->count();
+    }
+
+    /* }}} */
+
+    /* {{{ ArrayAccess Interface */
+
+    /**
+     * Checks if an item exists through ArrayAccess.
+     *
+     * This method just forwards the request to the inner iterator
+     *
+     * @param int $offset
+     *
+     * @return bool
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetExists($offset)
+    {
+        $iterator = $this->getIterator();
+
+        return $iterator->offsetExists($offset);
+    }
+
+    /**
+     * Gets an item through ArrayAccess.
+     *
+     * This method just forwards the request to the inner iterator
+     *
+     * @param int $offset
+     *
+     * @return mixed
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        $iterator = $this->getIterator();
+
+        return $iterator->offsetGet($offset);
+    }
+
+    /**
+     * Sets an item through ArrayAccess.
+     *
+     * This method just forwards the request to the inner iterator
+     *
+     * @param int   $offset
+     * @param mixed $value
+     *
+     * @return void
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetSet($offset, $value)
+    {
+        $iterator = $this->getIterator();
+        $iterator->offsetSet($offset, $value);
+
+        // @codeCoverageIgnoreStart
+    //
+    // This method always throws an exception, so we ignore the closing
+    // brace
+    }
+
+    // @codeCoverageIgnoreEnd
+
+    /**
+     * Sets an item through ArrayAccess.
+     *
+     * This method just forwards the request to the inner iterator
+     *
+     * @param int $offset
+     *
+     * @return void
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetUnset($offset)
+    {
+        $iterator = $this->getIterator();
+        $iterator->offsetUnset($offset);
+
+        // @codeCoverageIgnoreStart
+    //
+    // This method always throws an exception, so we ignore the closing
+    // brace
+    }
+
+    // @codeCoverageIgnoreEnd
+
+    /* }}} */
+}
--- a/vendor/sabre/vobject/lib/PHPUnitAssertions.php
+++ b/vendor/sabre/vobject/lib/PHPUnitAssertions.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * PHPUnit Assertions.
+ *
+ * This trait can be added to your unittest to make it easier to test iCalendar
+ * and/or vCards.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+trait PHPUnitAssertions
+{
+    /**
+     * This method tests whether two vcards or icalendar objects are
+     * semantically identical.
+     *
+     * It supports objects being supplied as strings, streams or
+     * Sabre\VObject\Component instances.
+     *
+     * PRODID is removed from both objects as this is often changes and would
+     * just get in the way.
+     *
+     * CALSCALE will automatically get removed if it's set to GREGORIAN.
+     *
+     * Any property that has the value **ANY** will be treated as a wildcard.
+     *
+     * @param resource|string|Component $expected
+     * @param resource|string|Component $actual
+     * @param string                    $message
+     */
+    public function assertVObjectEqualsVObject($expected, $actual, $message = '')
+    {
+        $getObj = function ($input) {
+            if (is_resource($input)) {
+                $input = stream_get_contents($input);
+            }
+            if (is_string($input)) {
+                $input = Reader::read($input);
+            }
+            if (!$input instanceof Component) {
+                $this->fail('Input must be a string, stream or VObject component');
+            }
+            unset($input->PRODID);
+            if ($input instanceof Component\VCalendar && 'GREGORIAN' === (string) $input->CALSCALE) {
+                unset($input->CALSCALE);
+            }
+
+            return $input;
+        };
+
+        $expected = $getObj($expected)->serialize();
+        $actual = $getObj($actual)->serialize();
+
+        // Finding wildcards in expected.
+        preg_match_all('|^([A-Z]+):\\*\\*ANY\\*\\*\r$|m', $expected, $matches, PREG_SET_ORDER);
+
+        foreach ($matches as $match) {
+            $actual = preg_replace(
+                '|^'.preg_quote($match[1], '|').':(.*)\r$|m',
+                $match[1].':**ANY**'."\r",
+                $actual
+            );
+        }
+
+        $this->assertEquals(
+            $expected,
+            $actual,
+            $message
+        );
+    }
+}
--- a/vendor/sabre/vobject/lib/Parameter.php
+++ b/vendor/sabre/vobject/lib/Parameter.php
@@ -0,0 +1,368 @@
+<?php
+
+namespace Sabre\VObject;
+
+use ArrayIterator;
+use Sabre\Xml;
+
+/**
+ * VObject Parameter.
+ *
+ * This class represents a parameter. A parameter is always tied to a property.
+ * In the case of:
+ *   DTSTART;VALUE=DATE:20101108
+ * VALUE=DATE would be the parameter name and value.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Parameter extends Node
+{
+    /**
+     * Parameter name.
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * vCard 2.1 allows parameters to be encoded without a name.
+     *
+     * We can deduce the parameter name based on its value.
+     *
+     * @var bool
+     */
+    public $noName = false;
+
+    /**
+     * Parameter value.
+     *
+     * @var string
+     */
+    protected $value;
+
+    /**
+     * Sets up the object.
+     *
+     * It's recommended to use the create:: factory method instead.
+     *
+     * @param string $name
+     * @param string $value
+     */
+    public function __construct(Document $root, $name, $value = null)
+    {
+        $this->root = $root;
+        if (is_null($name)) {
+            $this->noName = true;
+            $this->name = static::guessParameterNameByValue($value);
+        } else {
+            $this->name = strtoupper($name);
+        }
+
+        // If guessParameterNameByValue() returns an empty string
+        // above, we're actually dealing with a parameter that has no value.
+        // In that case we have to move the value to the name.
+        if ('' === $this->name) {
+            $this->noName = false;
+            $this->name = strtoupper($value);
+        } else {
+            $this->setValue($value);
+        }
+    }
+
+    /**
+     * Try to guess property name by value, can be used for vCard 2.1 nameless parameters.
+     *
+     * Figuring out what the name should have been. Note that a ton of
+     * these are rather silly in 2014 and would probably rarely be
+     * used, but we like to be complete.
+     *
+     * @param string $value
+     *
+     * @return string
+     */
+    public static function guessParameterNameByValue($value)
+    {
+        switch (strtoupper($value)) {
+            // Encodings
+            case '7-BIT':
+            case 'QUOTED-PRINTABLE':
+            case 'BASE64':
+                $name = 'ENCODING';
+                break;
+
+            // Common types
+            case 'WORK':
+            case 'HOME':
+            case 'PREF':
+            // Delivery Label Type
+            case 'DOM':
+            case 'INTL':
+            case 'POSTAL':
+            case 'PARCEL':
+            // Telephone types
+            case 'VOICE':
+            case 'FAX':
+            case 'MSG':
+            case 'CELL':
+            case 'PAGER':
+            case 'BBS':
+            case 'MODEM':
+            case 'CAR':
+            case 'ISDN':
+            case 'VIDEO':
+            // EMAIL types (lol)
+            case 'AOL':
+            case 'APPLELINK':
+            case 'ATTMAIL':
+            case 'CIS':
+            case 'EWORLD':
+            case 'INTERNET':
+            case 'IBMMAIL':
+            case 'MCIMAIL':
+            case 'POWERSHARE':
+            case 'PRODIGY':
+            case 'TLX':
+            case 'X400':
+            // Photo / Logo format types
+            case 'GIF':
+            case 'CGM':
+            case 'WMF':
+            case 'BMP':
+            case 'DIB':
+            case 'PICT':
+            case 'TIFF':
+            case 'PDF':
+            case 'PS':
+            case 'JPEG':
+            case 'MPEG':
+            case 'MPEG2':
+            case 'AVI':
+            case 'QTIME':
+            // Sound Digital Audio Type
+            case 'WAVE':
+            case 'PCM':
+            case 'AIFF':
+            // Key types
+            case 'X509':
+            case 'PGP':
+                $name = 'TYPE';
+                break;
+
+            // Value types
+            case 'INLINE':
+            case 'URL':
+            case 'CONTENT-ID':
+            case 'CID':
+                $name = 'VALUE';
+                break;
+
+            default:
+                $name = '';
+        }
+
+        return $name;
+    }
+
+    /**
+     * Updates the current value.
+     *
+     * This may be either a single, or multiple strings in an array.
+     *
+     * @param string|array $value
+     */
+    public function setValue($value)
+    {
+        $this->value = $value;
+    }
+
+    /**
+     * Returns the current value.
+     *
+     * This method will always return a string, or null. If there were multiple
+     * values, it will automatically concatenate them (separated by comma).
+     *
+     * @return string|null
+     */
+    public function getValue()
+    {
+        if (is_array($this->value)) {
+            return implode(',', $this->value);
+        } else {
+            return $this->value;
+        }
+    }
+
+    /**
+     * Sets multiple values for this parameter.
+     */
+    public function setParts(array $value)
+    {
+        $this->value = $value;
+    }
+
+    /**
+     * Returns all values for this parameter.
+     *
+     * If there were no values, an empty array will be returned.
+     *
+     * @return array
+     */
+    public function getParts()
+    {
+        if (is_array($this->value)) {
+            return $this->value;
+        } elseif (is_null($this->value)) {
+            return [];
+        } else {
+            return [$this->value];
+        }
+    }
+
+    /**
+     * Adds a value to this parameter.
+     *
+     * If the argument is specified as an array, all items will be added to the
+     * parameter value list.
+     *
+     * @param string|array $part
+     */
+    public function addValue($part)
+    {
+        if (is_null($this->value)) {
+            $this->value = $part;
+        } else {
+            $this->value = array_merge((array) $this->value, (array) $part);
+        }
+    }
+
+    /**
+     * Checks if this parameter contains the specified value.
+     *
+     * This is a case-insensitive match. It makes sense to call this for for
+     * instance the TYPE parameter, to see if it contains a keyword such as
+     * 'WORK' or 'FAX'.
+     *
+     * @param string $value
+     *
+     * @return bool
+     */
+    public function has($value)
+    {
+        return in_array(
+            strtolower($value),
+            array_map('strtolower', (array) $this->value)
+        );
+    }
+
+    /**
+     * Turns the object back into a serialized blob.
+     *
+     * @return string
+     */
+    public function serialize()
+    {
+        $value = $this->getParts();
+
+        if (0 === count($value)) {
+            return $this->name.'=';
+        }
+
+        if (Document::VCARD21 === $this->root->getDocumentType() && $this->noName) {
+            return implode(';', $value);
+        }
+
+        return $this->name.'='.array_reduce(
+            $value,
+            function ($out, $item) {
+                if (!is_null($out)) {
+                    $out .= ',';
+                }
+
+                // If there's no special characters in the string, we'll use the simple
+                // format.
+                //
+                // The list of special characters is defined as:
+                //
+                // Any character except CONTROL, DQUOTE, ";", ":", ","
+                //
+                // by the iCalendar spec:
+                // https://tools.ietf.org/html/rfc5545#section-3.1
+                //
+                // And we add ^ to that because of:
+                // https://tools.ietf.org/html/rfc6868
+                //
+                // But we've found that iCal (7.0, shipped with OSX 10.9)
+                // severely trips on + characters not being quoted, so we
+                // added + as well.
+                if (!preg_match('#(?: [\n":;\^,\+] )#x', $item)) {
+                    return $out.$item;
+                } else {
+                    // Enclosing in double-quotes, and using RFC6868 for encoding any
+                    // special characters
+                    $out .= '"'.strtr(
+                        $item,
+                        [
+                            '^' => '^^',
+                            "\n" => '^n',
+                            '"' => '^\'',
+                        ]
+                    ).'"';
+
+                    return $out;
+                }
+            }
+        );
+    }
+
+    /**
+     * This method returns an array, with the representation as it should be
+     * encoded in JSON. This is used to create jCard or jCal documents.
+     *
+     * @return array
+     */
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize()
+    {
+        return $this->value;
+    }
+
+    /**
+     * This method serializes the data into XML. This is used to create xCard or
+     * xCal documents.
+     *
+     * @param Xml\Writer $writer XML writer
+     */
+    public function xmlSerialize(Xml\Writer $writer): void
+    {
+        foreach (explode(',', $this->value) as $value) {
+            $writer->writeElement('text', $value);
+        }
+    }
+
+    /**
+     * Called when this object is being cast to a string.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return (string) $this->getValue();
+    }
+
+    /**
+     * Returns the iterator for this object.
+     *
+     * @return ElementList
+     */
+    #[\ReturnTypeWillChange]
+    public function getIterator()
+    {
+        if (!is_null($this->iterator)) {
+            return $this->iterator;
+        }
+
+        return $this->iterator = new ArrayIterator((array) $this->value);
+    }
+}
--- a/vendor/sabre/vobject/lib/ParseException.php
+++ b/vendor/sabre/vobject/lib/ParseException.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * Exception thrown by Reader if an invalid object was attempted to be parsed.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ParseException extends \Exception
+{
+}
--- a/vendor/sabre/vobject/lib/Parser/Json.php
+++ b/vendor/sabre/vobject/lib/Parser/Json.php
@@ -0,0 +1,190 @@
+<?php
+
+namespace Sabre\VObject\Parser;
+
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Component\VCard;
+use Sabre\VObject\Document;
+use Sabre\VObject\EofException;
+use Sabre\VObject\ParseException;
+use Sabre\VObject\Property\FlatText;
+use Sabre\VObject\Property\Text;
+
+/**
+ * Json Parser.
+ *
+ * This parser parses both the jCal and jCard formats.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Json extends Parser
+{
+    /**
+     * The input data.
+     *
+     * @var array
+     */
+    protected $input;
+
+    /**
+     * Root component.
+     *
+     * @var Document
+     */
+    protected $root;
+
+    /**
+     * This method starts the parsing process.
+     *
+     * If the input was not supplied during construction, it's possible to pass
+     * it here instead.
+     *
+     * If either input or options are not supplied, the defaults will be used.
+     *
+     * @param resource|string|array|null $input
+     * @param int                        $options
+     *
+     * @return \Sabre\VObject\Document
+     */
+    public function parse($input = null, $options = 0)
+    {
+        if (!is_null($input)) {
+            $this->setInput($input);
+        }
+        if (is_null($this->input)) {
+            throw new EofException('End of input stream, or no input supplied');
+        }
+
+        if (0 !== $options) {
+            $this->options = $options;
+        }
+
+        switch ($this->input[0]) {
+            case 'vcalendar':
+                $this->root = new VCalendar([], false);
+                break;
+            case 'vcard':
+                $this->root = new VCard([], false);
+                break;
+            default:
+                throw new ParseException('The root component must either be a vcalendar, or a vcard');
+        }
+        foreach ($this->input[1] as $prop) {
+            $this->root->add($this->parseProperty($prop));
+        }
+        if (isset($this->input[2])) {
+            foreach ($this->input[2] as $comp) {
+                $this->root->add($this->parseComponent($comp));
+            }
+        }
+
+        // Resetting the input so we can throw an feof exception the next time.
+        $this->input = null;
+
+        return $this->root;
+    }
+
+    /**
+     * Parses a component.
+     *
+     * @return \Sabre\VObject\Component
+     */
+    public function parseComponent(array $jComp)
+    {
+        // We can remove $self from PHP 5.4 onward.
+        $self = $this;
+
+        $properties = array_map(
+            function ($jProp) use ($self) {
+                return $self->parseProperty($jProp);
+            },
+            $jComp[1]
+        );
+
+        if (isset($jComp[2])) {
+            $components = array_map(
+                function ($jComp) use ($self) {
+                    return $self->parseComponent($jComp);
+                },
+                $jComp[2]
+            );
+        } else {
+            $components = [];
+        }
+
+        return $this->root->createComponent(
+            $jComp[0],
+            array_merge($properties, $components),
+            $defaults = false
+        );
+    }
+
+    /**
+     * Parses properties.
+     *
+     * @return \Sabre\VObject\Property
+     */
+    public function parseProperty(array $jProp)
+    {
+        list(
+            $propertyName,
+            $parameters,
+            $valueType
+        ) = $jProp;
+
+        $propertyName = strtoupper($propertyName);
+
+        // This is the default class we would be using if we didn't know the
+        // value type. We're using this value later in this function.
+        $defaultPropertyClass = $this->root->getClassNameForPropertyName($propertyName);
+
+        $parameters = (array) $parameters;
+
+        $value = array_slice($jProp, 3);
+
+        $valueType = strtoupper($valueType);
+
+        if (isset($parameters['group'])) {
+            $propertyName = $parameters['group'].'.'.$propertyName;
+            unset($parameters['group']);
+        }
+
+        $prop = $this->root->createProperty($propertyName, null, $parameters, $valueType);
+        $prop->setJsonValue($value);
+
+        // We have to do something awkward here. FlatText as well as Text
+        // represents TEXT values. We have to normalize these here. In the
+        // future we can get rid of FlatText once we're allowed to break BC
+        // again.
+        if (FlatText::class === $defaultPropertyClass) {
+            $defaultPropertyClass = Text::class;
+        }
+
+        // If the value type we received (e.g.: TEXT) was not the default value
+        // type for the given property (e.g.: BDAY), we need to add a VALUE=
+        // parameter.
+        if ($defaultPropertyClass !== get_class($prop)) {
+            $prop['VALUE'] = $valueType;
+        }
+
+        return $prop;
+    }
+
+    /**
+     * Sets the input data.
+     *
+     * @param resource|string|array $input
+     */
+    public function setInput($input)
+    {
+        if (is_resource($input)) {
+            $input = stream_get_contents($input);
+        }
+        if (is_string($input)) {
+            $input = json_decode($input);
+        }
+        $this->input = $input;
+    }
+}
--- a/vendor/sabre/vobject/lib/Parser/MimeDir.php
+++ b/vendor/sabre/vobject/lib/Parser/MimeDir.php
@@ -0,0 +1,710 @@
+<?php
+
+namespace Sabre\VObject\Parser;
+
+use Sabre\VObject\Component;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Component\VCard;
+use Sabre\VObject\Document;
+use Sabre\VObject\EofException;
+use Sabre\VObject\Node;
+use Sabre\VObject\ParseException;
+
+/**
+ * MimeDir parser.
+ *
+ * This class parses iCalendar 2.0 and vCard 2.1, 3.0 and 4.0 files. This
+ * parser will return one of the following two objects from the parse method:
+ *
+ * Sabre\VObject\Component\VCalendar
+ * Sabre\VObject\Component\VCard
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class MimeDir extends Parser
+{
+    public const TOKEN_PROPNAME = 1;
+    public const TOKEN_PROPVALUE = 2;
+    public const TOKEN_PARAMNAME = 3;
+    public const TOKEN_PARAMVALUE = 4;
+
+    /**
+     * The input stream.
+     *
+     * @var resource
+     */
+    protected $input;
+
+    /**
+     * Root component.
+     *
+     * @var Component
+     */
+    protected $root;
+
+    /**
+     * By default all input will be assumed to be UTF-8.
+     *
+     * However, both iCalendar and vCard might be encoded using different
+     * character sets. The character set is usually set in the mime-type.
+     *
+     * If this is the case, use setEncoding to specify that a different
+     * encoding will be used. If this is set, the parser will automatically
+     * convert all incoming data to UTF-8.
+     *
+     * @var string
+     */
+    protected $charset = 'UTF-8';
+
+    /**
+     * The list of character sets we support when decoding.
+     *
+     * This would be a const expression but for now we need to support PHP 5.5
+     */
+    protected static $SUPPORTED_CHARSETS = [
+        'UTF-8',
+        'ISO-8859-1',
+        'Windows-1252',
+    ];
+
+    /**
+     * Parses an iCalendar or vCard file.
+     *
+     * Pass a stream or a string. If null is parsed, the existing buffer is
+     * used.
+     *
+     * @param string|resource|null $input
+     * @param int                  $options
+     *
+     * @return \Sabre\VObject\Document
+     */
+    public function parse($input = null, $options = 0)
+    {
+        $this->root = null;
+
+        if (!is_null($input)) {
+            $this->setInput($input);
+        }
+
+        if (!\is_resource($this->input)) {
+            // Null was passed as input, but there was no existing input buffer
+            // There is nothing to parse.
+            throw new ParseException('No input provided to parse');
+        }
+
+        if (0 !== $options) {
+            $this->options = $options;
+        }
+
+        $this->parseDocument();
+
+        return $this->root;
+    }
+
+    /**
+     * By default all input will be assumed to be UTF-8.
+     *
+     * However, both iCalendar and vCard might be encoded using different
+     * character sets. The character set is usually set in the mime-type.
+     *
+     * If this is the case, use setEncoding to specify that a different
+     * encoding will be used. If this is set, the parser will automatically
+     * convert all incoming data to UTF-8.
+     *
+     * @param string $charset
+     */
+    public function setCharset($charset)
+    {
+        if (!in_array($charset, self::$SUPPORTED_CHARSETS)) {
+            throw new \InvalidArgumentException('Unsupported encoding. (Supported encodings: '.implode(', ', self::$SUPPORTED_CHARSETS).')');
+        }
+        $this->charset = $charset;
+    }
+
+    /**
+     * Sets the input buffer. Must be a string or stream.
+     *
+     * @param resource|string $input
+     */
+    public function setInput($input)
+    {
+        // Resetting the parser
+        $this->lineIndex = 0;
+        $this->startLine = 0;
+
+        if (is_string($input)) {
+            // Converting to a stream.
+            $stream = fopen('php://temp', 'r+');
+            fwrite($stream, $input);
+            rewind($stream);
+            $this->input = $stream;
+        } elseif (is_resource($input)) {
+            $this->input = $input;
+        } else {
+            throw new \InvalidArgumentException('This parser can only read from strings or streams.');
+        }
+    }
+
+    /**
+     * Parses an entire document.
+     */
+    protected function parseDocument()
+    {
+        $line = $this->readLine();
+
+        // BOM is ZERO WIDTH NO-BREAK SPACE (U+FEFF).
+        // It's 0xEF 0xBB 0xBF in UTF-8 hex.
+        if (3 <= strlen($line)
+            && 0xef === ord($line[0])
+            && 0xbb === ord($line[1])
+            && 0xbf === ord($line[2])) {
+            $line = substr($line, 3);
+        }
+
+        switch (strtoupper($line)) {
+            case 'BEGIN:VCALENDAR':
+                $class = VCalendar::$componentMap['VCALENDAR'];
+                break;
+            case 'BEGIN:VCARD':
+                $class = VCard::$componentMap['VCARD'];
+                break;
+            default:
+                throw new ParseException('This parser only supports VCARD and VCALENDAR files');
+        }
+
+        $this->root = new $class([], false);
+
+        while (true) {
+            // Reading until we hit END:
+            try {
+                $line = $this->readLine();
+            } catch (EofException $oEx) {
+                $line = 'END:'.$this->root->name;
+            }
+            if ('END:' === strtoupper(substr($line, 0, 4))) {
+                break;
+            }
+            $result = $this->parseLine($line);
+            if ($result) {
+                $this->root->add($result);
+            }
+        }
+
+        $name = strtoupper(substr($line, 4));
+        if ($name !== $this->root->name) {
+            throw new ParseException('Invalid MimeDir file. expected: "END:'.$this->root->name.'" got: "END:'.$name.'"');
+        }
+    }
+
+    /**
+     * Parses a line, and if it hits a component, it will also attempt to parse
+     * the entire component.
+     *
+     * @param string $line Unfolded line
+     *
+     * @return Node
+     */
+    protected function parseLine($line)
+    {
+        // Start of a new component
+        if ('BEGIN:' === strtoupper(substr($line, 0, 6))) {
+            if (substr($line, 6) === $this->root->name) {
+                throw new ParseException('Invalid MimeDir file. Unexpected component: "'.$line.'" in document type '.$this->root->name);
+            }
+            $component = $this->root->createComponent(substr($line, 6), [], false);
+
+            while (true) {
+                // Reading until we hit END:
+                $line = $this->readLine();
+                if ('END:' === strtoupper(substr($line, 0, 4))) {
+                    break;
+                }
+                $result = $this->parseLine($line);
+                if ($result) {
+                    $component->add($result);
+                }
+            }
+
+            $name = strtoupper(substr($line, 4));
+            if ($name !== $component->name) {
+                throw new ParseException('Invalid MimeDir file. expected: "END:'.$component->name.'" got: "END:'.$name.'"');
+            }
+
+            return $component;
+        } else {
+            // Property reader
+            $property = $this->readProperty($line);
+            if (!$property) {
+                // Ignored line
+                return false;
+            }
+
+            return $property;
+        }
+    }
+
+    /**
+     * We need to look ahead 1 line every time to see if we need to 'unfold'
+     * the next line.
+     *
+     * If that was not the case, we store it here.
+     *
+     * @var string|null
+     */
+    protected $lineBuffer;
+
+    /**
+     * The real current line number.
+     */
+    protected $lineIndex = 0;
+
+    /**
+     * In the case of unfolded lines, this property holds the line number for
+     * the start of the line.
+     *
+     * @var int
+     */
+    protected $startLine = 0;
+
+    /**
+     * Contains a 'raw' representation of the current line.
+     *
+     * @var string
+     */
+    protected $rawLine;
+
+    /**
+     * Reads a single line from the buffer.
+     *
+     * This method strips any newlines and also takes care of unfolding.
+     *
+     * @throws \Sabre\VObject\EofException
+     *
+     * @return string
+     */
+    protected function readLine()
+    {
+        if (!\is_null($this->lineBuffer)) {
+            $rawLine = $this->lineBuffer;
+            $this->lineBuffer = null;
+        } else {
+            do {
+                $eof = \feof($this->input);
+
+                $rawLine = \fgets($this->input);
+
+                if ($eof || (\feof($this->input) && false === $rawLine)) {
+                    throw new EofException('End of document reached prematurely');
+                }
+                if (false === $rawLine) {
+                    throw new ParseException('Error reading from input stream');
+                }
+                $rawLine = \rtrim($rawLine, "\r\n");
+            } while ('' === $rawLine); // Skipping empty lines
+            ++$this->lineIndex;
+        }
+        $line = $rawLine;
+
+        $this->startLine = $this->lineIndex;
+
+        // Looking ahead for folded lines.
+        while (true) {
+            $nextLine = \rtrim(\fgets($this->input), "\r\n");
+            ++$this->lineIndex;
+            if (!$nextLine) {
+                break;
+            }
+            if ("\t" === $nextLine[0] || ' ' === $nextLine[0]) {
+                $curLine = \substr($nextLine, 1);
+                $line .= $curLine;
+                $rawLine .= "\n ".$curLine;
+            } else {
+                $this->lineBuffer = $nextLine;
+                break;
+            }
+        }
+        $this->rawLine = $rawLine;
+
+        return $line;
+    }
+
+    /**
+     * Reads a property or component from a line.
+     */
+    protected function readProperty($line)
+    {
+        if ($this->options & self::OPTION_FORGIVING) {
+            $propNameToken = 'A-Z0-9\-\._\\/';
+        } else {
+            $propNameToken = 'A-Z0-9\-\.';
+        }
+
+        $paramNameToken = 'A-Z0-9\-';
+        $safeChar = '^";:,';
+        $qSafeChar = '^"';
+
+        $regex = "/
+            ^(?P<name> [$propNameToken]+ ) (?=[;:])        # property name
+            |
+            (?<=:)(?P<propValue> .+)$                      # property value
+            |
+            ;(?P<paramName> [$paramNameToken]+) (?=[=;:])  # parameter name
+            |
+            (=|,)(?P<paramValue>                           # parameter value
+                (?: [$safeChar]*) |
+                \"(?: [$qSafeChar]+)\"
+            ) (?=[;:,])
+            /xi";
+
+        //echo $regex, "\n"; exit();
+        preg_match_all($regex, $line, $matches, PREG_SET_ORDER);
+
+        $property = [
+            'name' => null,
+            'parameters' => [],
+            'value' => null,
+        ];
+
+        /*
+         * Keep track on the last token we parsed in order to do
+         * better error checking
+         */
+        $lastToken = null;
+
+        $lastParam = null;
+
+        /*
+         * Looping through all the tokens.
+         *
+         * Note that we are looping through them in reverse order, because if a
+         * sub-pattern matched, the subsequent named patterns will not show up
+         * in the result.
+         */
+        foreach ($matches as $match) {
+            if (isset($match['paramValue'])) {
+                if ($match['paramValue'] && '"' === $match['paramValue'][0]) {
+                    $value = substr($match['paramValue'], 1, -1);
+                } else {
+                    $value = $match['paramValue'];
+                }
+
+                $value = $this->unescapeParam($value);
+
+                if (is_null($lastParam)) {
+                    if ($this->options & self::OPTION_IGNORE_INVALID_LINES) {
+                        // When the property can't be matched and the configuration
+                        // option is set to ignore invalid lines, we ignore this line
+                        // This can happen when servers provide faulty data as iCloud
+                        //  frequently does with X-APPLE-STRUCTURED-LOCATION
+                        $lastToken = self::TOKEN_PARAMVALUE;
+                        continue;
+                    }
+                    throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.' did not follow iCalendar/vCard conventions');
+                }
+
+                if ('=' == $match[0][0] && self::TOKEN_PARAMNAME != $lastToken) {
+                    throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.': Missing parameter name for parameter value "'.$match['paramValue'].'"');
+                }
+
+                if (is_null($property['parameters'][$lastParam])) {
+                    $property['parameters'][$lastParam] = $value;
+                } elseif (is_array($property['parameters'][$lastParam])) {
+                    $property['parameters'][$lastParam][] = $value;
+                } elseif ($property['parameters'][$lastParam] === $value) {
+                    // When the current value of the parameter is the same as the
+                    // new one, then we can leave the current parameter as it is.
+                } else {
+                    $property['parameters'][$lastParam] = [
+                        $property['parameters'][$lastParam],
+                        $value,
+                    ];
+                }
+                $lastToken = self::TOKEN_PARAMVALUE;
+                continue;
+            }
+            if (isset($match['paramName'])) {
+                $lastParam = strtoupper($match['paramName']);
+                if (!isset($property['parameters'][$lastParam])) {
+                    $property['parameters'][$lastParam] = null;
+                }
+                $lastToken = self::TOKEN_PARAMNAME;
+                continue;
+            }
+            if (isset($match['propValue'])) {
+                $property['value'] = $match['propValue'];
+                $lastToken = self::TOKEN_PROPVALUE;
+                continue;
+            }
+            if (isset($match['name']) && 0 < strlen($match['name'])) {
+                $property['name'] = strtoupper($match['name']);
+                $lastToken = self::TOKEN_PROPNAME;
+                continue;
+            }
+
+            // @codeCoverageIgnoreStart
+            throw new \LogicException('This code should not be reachable');
+            // @codeCoverageIgnoreEnd
+        }
+
+        if (is_null($property['value'])) {
+            $property['value'] = '';
+        }
+        if (!isset($property['name']) || 0 == strlen($property['name'])) {
+            if ($this->options & self::OPTION_IGNORE_INVALID_LINES) {
+                return false;
+            }
+            throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.' did not follow iCalendar/vCard conventions');
+        }
+
+        // vCard 2.1 states that parameters may appear without a name, and only
+        // a value. We can deduce the value based on its name.
+        //
+        // Our parser will get those as parameters without a value instead, so
+        // we're filtering these parameters out first.
+        $namedParameters = [];
+        $namelessParameters = [];
+
+        foreach ($property['parameters'] as $name => $value) {
+            if (!is_null($value)) {
+                $namedParameters[$name] = $value;
+            } else {
+                $namelessParameters[] = $name;
+            }
+        }
+
+        $propObj = $this->root->createProperty($property['name'], null, $namedParameters, null, $this->startLine, $line);
+
+        foreach ($namelessParameters as $namelessParameter) {
+            $propObj->add(null, $namelessParameter);
+        }
+
+        if (isset($propObj['ENCODING']) && 'QUOTED-PRINTABLE' === strtoupper($propObj['ENCODING'])) {
+            $propObj->setQuotedPrintableValue($this->extractQuotedPrintableValue());
+        } else {
+            $charset = $this->charset;
+            if (Document::VCARD21 === $this->root->getDocumentType() && isset($propObj['CHARSET'])) {
+                // vCard 2.1 allows the character set to be specified per property.
+                $charset = (string) $propObj['CHARSET'];
+            }
+            switch (strtolower($charset)) {
+                case 'utf-8':
+                    break;
+                case 'windows-1252':
+                case 'iso-8859-1':
+                    $property['value'] = mb_convert_encoding($property['value'], 'UTF-8', $charset);
+                    break;
+                default:
+                    throw new ParseException('Unsupported CHARSET: '.$propObj['CHARSET']);
+            }
+            $propObj->setRawMimeDirValue($property['value']);
+        }
+
+        return $propObj;
+    }
+
+    /**
+     * Unescapes a property value.
+     *
+     * vCard 2.1 says:
+     *   * Semi-colons must be escaped in some property values, specifically
+     *     ADR, ORG and N.
+     *   * Semi-colons must be escaped in parameter values, because semi-colons
+     *     are also use to separate values.
+     *   * No mention of escaping backslashes with another backslash.
+     *   * newlines are not escaped either, instead QUOTED-PRINTABLE is used to
+     *     span values over more than 1 line.
+     *
+     * vCard 3.0 says:
+     *   * (rfc2425) Backslashes, newlines (\n or \N) and comma's must be
+     *     escaped, all time time.
+     *   * Comma's are used for delimiters in multiple values
+     *   * (rfc2426) Adds to to this that the semi-colon MUST also be escaped,
+     *     as in some properties semi-colon is used for separators.
+     *   * Properties using semi-colons: N, ADR, GEO, ORG
+     *   * Both ADR and N's individual parts may be broken up further with a
+     *     comma.
+     *   * Properties using commas: NICKNAME, CATEGORIES
+     *
+     * vCard 4.0 (rfc6350) says:
+     *   * Commas must be escaped.
+     *   * Semi-colons may be escaped, an unescaped semi-colon _may_ be a
+     *     delimiter, depending on the property.
+     *   * Backslashes must be escaped
+     *   * Newlines must be escaped as either \N or \n.
+     *   * Some compound properties may contain multiple parts themselves, so a
+     *     comma within a semi-colon delimited property may also be unescaped
+     *     to denote multiple parts _within_ the compound property.
+     *   * Text-properties using semi-colons: N, ADR, ORG, CLIENTPIDMAP.
+     *   * Text-properties using commas: NICKNAME, RELATED, CATEGORIES, PID.
+     *
+     * Even though the spec says that commas must always be escaped, the
+     * example for GEO in Section 6.5.2 seems to violate this.
+     *
+     * iCalendar 2.0 (rfc5545) says:
+     *   * Commas or semi-colons may be used as delimiters, depending on the
+     *     property.
+     *   * Commas, semi-colons, backslashes, newline (\N or \n) are always
+     *     escaped, unless they are delimiters.
+     *   * Colons shall not be escaped.
+     *   * Commas can be considered the 'default delimiter' and is described as
+     *     the delimiter in cases where the order of the multiple values is
+     *     insignificant.
+     *   * Semi-colons are described as the delimiter for 'structured values'.
+     *     They are specifically used in Semi-colons are used as a delimiter in
+     *     REQUEST-STATUS, RRULE, GEO and EXRULE. EXRULE is deprecated however.
+     *
+     * Now for the parameters
+     *
+     * If delimiter is not set (empty string) this method will just return a string.
+     * If it's a comma or a semi-colon the string will be split on those
+     * characters, and always return an array.
+     *
+     * @param string $input
+     * @param string $delimiter
+     *
+     * @return string|string[]
+     */
+    public static function unescapeValue($input, $delimiter = ';')
+    {
+        $regex = '#  (?: (\\\\ (?: \\\\ | N | n | ; | , ) )';
+        if ($delimiter) {
+            $regex .= ' | ('.$delimiter.')';
+        }
+        $regex .= ') #x';
+
+        $matches = preg_split($regex, $input, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
+
+        $resultArray = [];
+        $result = '';
+
+        foreach ($matches as $match) {
+            switch ($match) {
+                case '\\\\':
+                    $result .= '\\';
+                    break;
+                case '\N':
+                case '\n':
+                    $result .= "\n";
+                    break;
+                case '\;':
+                    $result .= ';';
+                    break;
+                case '\,':
+                    $result .= ',';
+                    break;
+                case $delimiter:
+                    $resultArray[] = $result;
+                    $result = '';
+                    break;
+                default:
+                    $result .= $match;
+                    break;
+            }
+        }
+
+        $resultArray[] = $result;
+
+        return $delimiter ? $resultArray : $result;
+    }
+
+    /**
+     * Unescapes a parameter value.
+     *
+     * vCard 2.1:
+     *   * Does not mention a mechanism for this. In addition, double quotes
+     *     are never used to wrap values.
+     *   * This means that parameters can simply not contain colons or
+     *     semi-colons.
+     *
+     * vCard 3.0 (rfc2425, rfc2426):
+     *   * Parameters _may_ be surrounded by double quotes.
+     *   * If this is not the case, semi-colon, colon and comma may simply not
+     *     occur (the comma used for multiple parameter values though).
+     *   * If it is surrounded by double-quotes, it may simply not contain
+     *     double-quotes.
+     *   * This means that a parameter can in no case encode double-quotes, or
+     *     newlines.
+     *
+     * vCard 4.0 (rfc6350)
+     *   * Behavior seems to be identical to vCard 3.0
+     *
+     * iCalendar 2.0 (rfc5545)
+     *   * Behavior seems to be identical to vCard 3.0
+     *
+     * Parameter escaping mechanism (rfc6868) :
+     *   * This rfc describes a new way to escape parameter values.
+     *   * New-line is encoded as ^n
+     *   * ^ is encoded as ^^.
+     *   * " is encoded as ^'
+     *
+     * @param string $input
+     */
+    private function unescapeParam($input)
+    {
+        return
+            preg_replace_callback(
+                '#(\^(\^|n|\'))#',
+                function ($matches) {
+                    switch ($matches[2]) {
+                        case 'n':
+                            return "\n";
+                        case '^':
+                            return '^';
+                        case '\'':
+                            return '"';
+
+                    // @codeCoverageIgnoreStart
+                    }
+                    // @codeCoverageIgnoreEnd
+                },
+                $input
+            );
+    }
+
+    /**
+     * Gets the full quoted printable value.
+     *
+     * We need a special method for this, because newlines have both a meaning
+     * in vCards, and in QuotedPrintable.
+     *
+     * This method does not do any decoding.
+     *
+     * @return string
+     */
+    private function extractQuotedPrintableValue()
+    {
+        // We need to parse the raw line again to get the start of the value.
+        //
+        // We are basically looking for the first colon (:), but we need to
+        // skip over the parameters first, as they may contain one.
+        $regex = '/^
+            (?: [^:])+ # Anything but a colon
+            (?: "[^"]")* # A parameter in double quotes
+            : # start of the value we really care about
+            (.*)$
+        /xs';
+
+        preg_match($regex, $this->rawLine, $matches);
+
+        $value = $matches[1];
+        // Removing the first whitespace character from every line. Kind of
+        // like unfolding, but we keep the newline.
+        $value = str_replace("\n ", "\n", $value);
+
+        // Microsoft products don't always correctly fold lines, they may be
+        // missing a whitespace. So if 'forgiving' is turned on, we will take
+        // those as well.
+        if ($this->options & self::OPTION_FORGIVING) {
+            while ('=' === substr($value, -1) && $this->lineBuffer) {
+                // Reading the line
+                $this->readLine();
+                // Grabbing the raw form
+                $value .= "\n".$this->rawLine;
+            }
+        }
+
+        return $value;
+    }
+}
--- a/vendor/sabre/vobject/lib/Parser/Parser.php
+++ b/vendor/sabre/vobject/lib/Parser/Parser.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Sabre\VObject\Parser;
+
+/**
+ * Abstract parser.
+ *
+ * This class serves as a base-class for the different parsers.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class Parser
+{
+    /**
+     * Turning on this option makes the parser more forgiving.
+     *
+     * In the case of the MimeDir parser, this means that the parser will
+     * accept slashes and underscores in property names, and it will also
+     * attempt to fix Microsoft vCard 2.1's broken line folding.
+     */
+    const OPTION_FORGIVING = 1;
+
+    /**
+     * If this option is turned on, any lines we cannot parse will be ignored
+     * by the reader.
+     */
+    const OPTION_IGNORE_INVALID_LINES = 2;
+
+    /**
+     * Bitmask of parser options.
+     *
+     * @var int
+     */
+    protected $options;
+
+    /**
+     * Creates the parser.
+     *
+     * Optionally, it's possible to parse the input stream here.
+     *
+     * @param mixed $input
+     * @param int   $options any parser options (OPTION constants)
+     */
+    public function __construct($input = null, $options = 0)
+    {
+        if (!is_null($input)) {
+            $this->setInput($input);
+        }
+        $this->options = $options;
+    }
+
+    /**
+     * This method starts the parsing process.
+     *
+     * If the input was not supplied during construction, it's possible to pass
+     * it here instead.
+     *
+     * If either input or options are not supplied, the defaults will be used.
+     *
+     * @param mixed $input
+     * @param int   $options
+     *
+     * @return array
+     */
+    abstract public function parse($input = null, $options = 0);
+
+    /**
+     * Sets the input data.
+     *
+     * @param mixed $input
+     */
+    abstract public function setInput($input);
+}
--- a/vendor/sabre/vobject/lib/Parser/XML.php
+++ b/vendor/sabre/vobject/lib/Parser/XML.php
@@ -0,0 +1,377 @@
+<?php
+
+namespace Sabre\VObject\Parser;
+
+use Sabre\VObject\Component;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Component\VCard;
+use Sabre\VObject\EofException;
+use Sabre\VObject\ParseException;
+use Sabre\Xml as SabreXml;
+
+/**
+ * XML Parser.
+ *
+ * This parser parses both the xCal and xCard formats.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Ivan Enderlin
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class XML extends Parser
+{
+    const XCAL_NAMESPACE = 'urn:ietf:params:xml:ns:icalendar-2.0';
+    const XCARD_NAMESPACE = 'urn:ietf:params:xml:ns:vcard-4.0';
+
+    /**
+     * The input data.
+     *
+     * @var array
+     */
+    protected $input;
+
+    /**
+     * A pointer/reference to the input.
+     *
+     * @var array
+     */
+    private $pointer;
+
+    /**
+     * Document, root component.
+     *
+     * @var \Sabre\VObject\Document
+     */
+    protected $root;
+
+    /**
+     * Creates the parser.
+     *
+     * Optionally, it's possible to parse the input stream here.
+     *
+     * @param mixed $input
+     * @param int   $options any parser options (OPTION constants)
+     */
+    public function __construct($input = null, $options = 0)
+    {
+        if (0 === $options) {
+            $options = parent::OPTION_FORGIVING;
+        }
+
+        parent::__construct($input, $options);
+    }
+
+    /**
+     * Parse xCal or xCard.
+     *
+     * @param resource|string $input
+     * @param int             $options
+     *
+     * @throws \Exception
+     *
+     * @return \Sabre\VObject\Document
+     */
+    public function parse($input = null, $options = 0)
+    {
+        if (!is_null($input)) {
+            $this->setInput($input);
+        }
+
+        if (0 !== $options) {
+            $this->options = $options;
+        }
+
+        if (is_null($this->input)) {
+            throw new EofException('End of input stream, or no input supplied');
+        }
+
+        switch ($this->input['name']) {
+            case '{'.self::XCAL_NAMESPACE.'}icalendar':
+                $this->root = new VCalendar([], false);
+                $this->pointer = &$this->input['value'][0];
+                $this->parseVCalendarComponents($this->root);
+                break;
+
+            case '{'.self::XCARD_NAMESPACE.'}vcards':
+                foreach ($this->input['value'] as &$vCard) {
+                    $this->root = new VCard(['version' => '4.0'], false);
+                    $this->pointer = &$vCard;
+                    $this->parseVCardComponents($this->root);
+
+                    // We just parse the first <vcard /> element.
+                    break;
+                }
+                break;
+
+            default:
+                throw new ParseException('Unsupported XML standard');
+        }
+
+        return $this->root;
+    }
+
+    /**
+     * Parse a xCalendar component.
+     */
+    protected function parseVCalendarComponents(Component $parentComponent)
+    {
+        foreach ($this->pointer['value'] ?: [] as $children) {
+            switch (static::getTagName($children['name'])) {
+                case 'properties':
+                    $this->pointer = &$children['value'];
+                    $this->parseProperties($parentComponent);
+                    break;
+
+                case 'components':
+                    $this->pointer = &$children;
+                    $this->parseComponent($parentComponent);
+                    break;
+            }
+        }
+    }
+
+    /**
+     * Parse a xCard component.
+     */
+    protected function parseVCardComponents(Component $parentComponent)
+    {
+        $this->pointer = &$this->pointer['value'];
+        $this->parseProperties($parentComponent);
+    }
+
+    /**
+     * Parse xCalendar and xCard properties.
+     *
+     * @param string $propertyNamePrefix
+     */
+    protected function parseProperties(Component $parentComponent, $propertyNamePrefix = '')
+    {
+        foreach ($this->pointer ?: [] as $xmlProperty) {
+            list($namespace, $tagName) = SabreXml\Service::parseClarkNotation($xmlProperty['name']);
+
+            $propertyName = $tagName;
+            $propertyValue = [];
+            $propertyParameters = [];
+            $propertyType = 'text';
+
+            // A property which is not part of the standard.
+            if (self::XCAL_NAMESPACE !== $namespace
+                && self::XCARD_NAMESPACE !== $namespace) {
+                $propertyName = 'xml';
+                $value = '<'.$tagName.' xmlns="'.$namespace.'"';
+
+                foreach ($xmlProperty['attributes'] as $attributeName => $attributeValue) {
+                    $value .= ' '.$attributeName.'="'.str_replace('"', '\"', $attributeValue).'"';
+                }
+
+                $value .= '>'.$xmlProperty['value'].'</'.$tagName.'>';
+
+                $propertyValue = [$value];
+
+                $this->createProperty(
+                    $parentComponent,
+                    $propertyName,
+                    $propertyParameters,
+                    $propertyType,
+                    $propertyValue
+                );
+
+                continue;
+            }
+
+            // xCard group.
+            if ('group' === $propertyName) {
+                if (!isset($xmlProperty['attributes']['name'])) {
+                    continue;
+                }
+
+                $this->pointer = &$xmlProperty['value'];
+                $this->parseProperties(
+                    $parentComponent,
+                    strtoupper($xmlProperty['attributes']['name']).'.'
+                );
+
+                continue;
+            }
+
+            // Collect parameters.
+            foreach ($xmlProperty['value'] as $i => $xmlPropertyChild) {
+                if (!is_array($xmlPropertyChild)
+                    || 'parameters' !== static::getTagName($xmlPropertyChild['name'])) {
+                    continue;
+                }
+
+                $xmlParameters = $xmlPropertyChild['value'];
+
+                foreach ($xmlParameters as $xmlParameter) {
+                    $propertyParameterValues = [];
+
+                    foreach ($xmlParameter['value'] as $xmlParameterValues) {
+                        $propertyParameterValues[] = $xmlParameterValues['value'];
+                    }
+
+                    $propertyParameters[static::getTagName($xmlParameter['name'])]
+                        = implode(',', $propertyParameterValues);
+                }
+
+                array_splice($xmlProperty['value'], $i, 1);
+            }
+
+            $propertyNameExtended = ($this->root instanceof VCalendar
+                                      ? 'xcal'
+                                      : 'xcard').':'.$propertyName;
+
+            switch ($propertyNameExtended) {
+                case 'xcal:geo':
+                    $propertyType = 'float';
+                    $propertyValue['latitude'] = 0;
+                    $propertyValue['longitude'] = 0;
+
+                    foreach ($xmlProperty['value'] as $xmlRequestChild) {
+                        $propertyValue[static::getTagName($xmlRequestChild['name'])]
+                            = $xmlRequestChild['value'];
+                    }
+                    break;
+
+                case 'xcal:request-status':
+                    $propertyType = 'text';
+
+                    foreach ($xmlProperty['value'] as $xmlRequestChild) {
+                        $propertyValue[static::getTagName($xmlRequestChild['name'])]
+                            = $xmlRequestChild['value'];
+                    }
+                    break;
+
+                case 'xcal:freebusy':
+                    $propertyType = 'freebusy';
+                    // We don't break because we only want to set
+                    // another property type.
+
+                    // no break
+                case 'xcal:categories':
+                case 'xcal:resources':
+                case 'xcal:exdate':
+                    foreach ($xmlProperty['value'] as $specialChild) {
+                        $propertyValue[static::getTagName($specialChild['name'])]
+                            = $specialChild['value'];
+                    }
+                    break;
+
+                case 'xcal:rdate':
+                    $propertyType = 'date-time';
+
+                    foreach ($xmlProperty['value'] as $specialChild) {
+                        $tagName = static::getTagName($specialChild['name']);
+
+                        if ('period' === $tagName) {
+                            $propertyParameters['value'] = 'PERIOD';
+                            $propertyValue[] = implode('/', $specialChild['value']);
+                        } else {
+                            $propertyValue[] = $specialChild['value'];
+                        }
+                    }
+                    break;
+
+                default:
+                    $propertyType = static::getTagName($xmlProperty['value'][0]['name']);
+
+                    foreach ($xmlProperty['value'] as $value) {
+                        $propertyValue[] = $value['value'];
+                    }
+
+                    if ('date' === $propertyType) {
+                        $propertyParameters['value'] = 'DATE';
+                    }
+                    break;
+            }
+
+            $this->createProperty(
+                $parentComponent,
+                $propertyNamePrefix.$propertyName,
+                $propertyParameters,
+                $propertyType,
+                $propertyValue
+            );
+        }
+    }
+
+    /**
+     * Parse a component.
+     */
+    protected function parseComponent(Component $parentComponent)
+    {
+        $components = $this->pointer['value'] ?: [];
+
+        foreach ($components as $component) {
+            $componentName = static::getTagName($component['name']);
+            $currentComponent = $this->root->createComponent(
+                $componentName,
+                null,
+                false
+            );
+
+            $this->pointer = &$component;
+            $this->parseVCalendarComponents($currentComponent);
+
+            $parentComponent->add($currentComponent);
+        }
+    }
+
+    /**
+     * Create a property.
+     *
+     * @param string $name
+     * @param array  $parameters
+     * @param string $type
+     * @param mixed  $value
+     */
+    protected function createProperty(Component $parentComponent, $name, $parameters, $type, $value)
+    {
+        $property = $this->root->createProperty(
+            $name,
+            null,
+            $parameters,
+            $type
+        );
+        $parentComponent->add($property);
+        $property->setXmlValue($value);
+    }
+
+    /**
+     * Sets the input data.
+     *
+     * @param resource|string $input
+     */
+    public function setInput($input)
+    {
+        if (is_resource($input)) {
+            $input = stream_get_contents($input);
+        }
+
+        if (is_string($input)) {
+            $reader = new SabreXml\Reader();
+            $reader->elementMap['{'.self::XCAL_NAMESPACE.'}period']
+                = XML\Element\KeyValue::class;
+            $reader->elementMap['{'.self::XCAL_NAMESPACE.'}recur']
+                = XML\Element\KeyValue::class;
+            $reader->xml($input);
+            $input = $reader->parse();
+        }
+
+        $this->input = $input;
+    }
+
+    /**
+     * Get tag name from a Clark notation.
+     *
+     * @param string $clarkedTagName
+     *
+     * @return string
+     */
+    protected static function getTagName($clarkedTagName)
+    {
+        list(, $tagName) = SabreXml\Service::parseClarkNotation($clarkedTagName);
+
+        return $tagName;
+    }
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
luxick	f1ac693fe8	Add the Chronological	2026-02-16 13:39:26 +01:00
luxick	c091ed1371	Add grouping feature	2026-02-13 13:14:11 +01:00
luxick	164df2f770	fix data-src in image macro	2026-02-13 10:24:18 +01:00
luxick	232802b0ce	Add explcit aliases for open links	2026-02-13 10:10:57 +01:00
luxick	4dae370deb	Refine Page Linking workflow	2026-02-09 09:23:04 +01:00
luxick	a5c44e106e	Allow downloading the pagelink file directly	2026-02-04 09:53:43 +01:00
luxick	70a9f30336	Extract Pagelink functionality	2026-02-03 08:00:09 +01:00
luxick	1b6df4a9e4	Improved Page lik handling	2026-02-02 22:36:38 +01:00
luxick	47a8bfa50a	Unlinking	2026-02-02 21:55:35 +01:00
luxick	e1102d9f06	V1	2026-02-02 21:13:51 +01:00
luxick	af0ca29131	Refine spec	2026-02-02 20:55:35 +01:00
luxick	c203fe6397	Add spec	2026-02-02 20:39:02 +01:00