Add cache inclalidation for Chronological

action.php

@@ -3,11 +3,13 @@
 use dokuwiki\Extension\ActionPlugin;
 use dokuwiki\Extension\Event;
 use dokuwiki\Extension\EventHandler;
+use dokuwiki\plugin\luxtools\CacheInvalidation;
 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;
+use dokuwiki\plugin\luxtools\MenuItem\InvalidateCache;
 require_once(__DIR__ . '/autoload.php');
 
 /**
@@ -69,6 +71,18 @@ class action_plugin_luxtools extends ActionPlugin
             $this,
             "handleCalendarWidgetAjax",
         );
+        $controller->register_hook(
+            "ACTION_ACT_PREPROCESS",
+            "BEFORE",
+            $this,
+            "handleInvalidateCacheAction",
+        );
+        $controller->register_hook(
+            "MENU_ITEMS_ASSEMBLY",
+            "AFTER",
+            $this,
+            "addInvalidateCacheMenuItem",
+        );
         $controller->register_hook(
             "TOOLBAR_DEFINE",
             "AFTER",
@@ -137,6 +151,8 @@ class action_plugin_luxtools extends ActionPlugin
             return;
         }
 
+        $this->sendNoStoreHeaders();
+
         $html = ChronologicalCalendarWidget::render($year, $month, $baseNs);
         if ($html === '') {
             http_status(500);
@@ -391,6 +407,9 @@ class action_plugin_luxtools extends ActionPlugin
         if ($id === '') return;
 
         if (!ChronoID::isDayId($id)) return;
+
+        $this->sendNoStoreHeaders();
+
         if (function_exists('page_exists') && page_exists($id)) return;
 
         $wikiText = ChronologicalDayTemplate::buildForDayId($id) ?? '';
@@ -578,4 +597,99 @@ class action_plugin_luxtools extends ActionPlugin
             "block" => false,
         ];
     }
+
+    /**
+     * Add admin-only page-tools item to invalidate luxtools caches.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function addInvalidateCacheMenuItem(Event $event, $param)
+    {
+        if (!is_array($event->data)) return;
+        if (($event->data['view'] ?? '') !== 'page') return;
+        if (!function_exists('auth_isadmin') || !auth_isadmin()) return;
+        if (!isset($event->data['items']) || !is_array($event->data['items'])) return;
+
+        $label = (string)$this->getLang('cache_invalidate_button');
+        if ($label === '') $label = 'Invalidate Cache';
+
+        $title = (string)$this->getLang('cache_invalidate_button_title');
+        if ($title === '') $title = 'Invalidate luxtools cache for this page';
+
+        $event->data['items'][] = new InvalidateCache($label, $title);
+    }
+
+    /**
+     * Handle manual cache invalidation action.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function handleInvalidateCacheAction(Event $event, $param)
+    {
+        if (!is_string($event->data) || $event->data !== 'show') return;
+
+        global $INPUT;
+        if (!$INPUT->bool('luxtools_invalidate_cache')) return;
+
+        global $ID;
+        $id = is_string($ID) ? $ID : '';
+        if (function_exists('cleanID')) {
+            $id = (string)cleanID($id);
+        }
+
+        if (!function_exists('auth_isadmin') || !auth_isadmin()) {
+            $message = (string)$this->getLang('cache_invalidate_denied');
+            if ($message === '') $message = 'Only admins can invalidate cache.';
+            msg($message, -1);
+            $this->redirectToShow($id);
+            return;
+        }
+
+        if (!checkSecurityToken()) {
+            $message = (string)$this->getLang('cache_invalidate_badtoken');
+            if ($message === '') $message = 'Security token mismatch. Please retry.';
+            msg($message, -1);
+            $this->redirectToShow($id);
+            return;
+        }
+
+        $removed = CacheInvalidation::purgeAll();
+        $message = (string)$this->getLang('cache_invalidate_success');
+        if ($message === '') {
+            $message = 'DokuWiki cache invalidated.';
+        }
+        msg($message . ' (' . $removed . ')', 1);
+
+        $this->redirectToShow($id);
+    }
+
+    /**
+     * Redirect to normal show view for the given page.
+     *
+     * @param string $id
+     * @return void
+     */
+    protected function redirectToShow(string $id): void
+    {
+        $params = ['do' => 'show'];
+        send_redirect(wl($id, $params, true, '&'));
+    }
+
+    /**
+     * Send no-store cache headers for highly dynamic responses.
+     *
+     * @return void
+     */
+    protected function sendNoStoreHeaders(): void
+    {
+        if (headers_sent()) return;
+
+        header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
+        header('Pragma: no-cache');
+        header('Expires: 0');
+    }
 }