Fixes caching issues with the include plugin

Fixes #165 #105

Author: Klap-in

action.php

@@ -79,23 +79,40 @@ public function convert(Doku_Event $event, $param) {
                     . $title;
         $cache = new cache($cachekey, '.dw2.pdf');
 
-        $mediafiles = array();
+        $dependencies = array();
         foreach($this->list as $pageid) {
-            $mediainuse = p_get_metadata($pageid, 'relation media');
-            if(is_array($mediainuse)) {
-                foreach($mediainuse as $mediaid => $exists) {
-                    if($exists) {
-                        $mediafiles[] = mediaFN($mediaid);
+            $relations = p_get_metadata($pageid, 'relation');
+
+            if (is_array($relations)) {
+                if(array_key_exists('media', $relations) && is_array($relations['media'])) {
+                    foreach($relations['media'] as $mediaid => $exists) {
+                        if($exists) {
+                            $dependencies[] = mediaFN($mediaid);
+                        }
+                    }
+                }
+
+                if(array_key_exists('haspart', $relations) && is_array($relations['haspart'])) {
+                    foreach($relations['haspart'] as $part_pageid => $exists) {
+                        if($exists) {
+                            $dependencies[] = wikiFN($part_pageid);
+                        }
                     }
                 }
             }
+
+            $dependencies[] = metaFN($pageid,'.meta');
         }
 
         $depends['files']   = array_map('wikiFN', $this->list);
         $depends['files'][] = __FILE__;
         $depends['files'][] = dirname(__FILE__) . '/renderer.php';
         $depends['files'][] = dirname(__FILE__) . '/mpdf/mpdf.php';
-        $depends['files']   = array_merge($depends['files'], $mediafiles, getConfigFiles('main'));
+        $depends['files']   = array_merge(
+                                $depends['files'],
+                                $dependencies,
+                                getConfigFiles('main')
+                              );
 
         // hard work only when no cache available
         if(!$this->getConf('usecache') || !$cache->useCache($depends)) {