Fix base class

syntax/AbstractSyntax.php

@@ -10,6 +10,7 @@ use dokuwiki\plugin\luxtools\Path;
  *
  * Provides shared functionality for directory, files, and images syntax.
  */
+if (!class_exists('syntax_plugin_luxtools_abstract', false)) {
 abstract class syntax_plugin_luxtools_abstract extends SyntaxPlugin
 {
     /**
@@ -103,15 +104,47 @@ abstract class syntax_plugin_luxtools_abstract extends SyntaxPlugin
             return false;
         }
 
+        // DokuWiki caches the $data returned by handle(). When the shape changes
+        // between plugin versions, old cached instructions can feed unexpected
+        // structures (or even null) into render(). Be defensive to avoid fatals.
+        if (!is_array($data)) {
+            return false;
+        }
+
         if ($format !== 'xhtml' && $format !== 'odt') {
             return false;
         }
 
-        $pathData = $data['pathData'];
-        $params = $data['params'];
+        // New format: ['pathData' => array, 'params' => array]
+        // Back-compat: numeric list or older associative keys.
+        $pathData = $data['pathData'] ?? ($data[0] ?? null);
+        $params = $data['params'] ?? ($data[1] ?? null);
+
+        // Some older cached instructions may pass the raw path as string.
+        if (is_string($pathData)) {
+            $pathData = $this->processPath($pathData);
+        }
+
+        // If params are missing (older cache), fall back to defaults.
+        if (!is_array($params)) {
+            $params = $this->parseFlags('');
+        }
+
+        // If pathData was inlined (e.g. ['base'=>..,'pattern'=>..,'params'=>..]), extract it.
+        if (!is_array($pathData)) {
+            $candidate = $data;
+            unset($candidate['params']);
+            if (isset($candidate['base']) || isset($candidate['pattern']) || isset($candidate['path'])) {
+                $pathData = $candidate;
+            }
+        }
+
+        if (!is_array($pathData)) {
+            return false;
+        }
 
         // Disable caching if requested
-        if ($params['cache'] === 0) {
+        if (($params['cache'] ?? 0) == 0) {
             $renderer->nocache();
         }
 
@@ -218,3 +251,5 @@ abstract class syntax_plugin_luxtools_abstract extends SyntaxPlugin
         return [$base, $pattern];
     }
 }
+
+}