MDL-22176 backup & restore links - Added support for course encoder

backup/moodle2/backup_course_task.class.php

@@ -103,6 +103,23 @@ class backup_course_task extends backup_task {
         $this->built = true;
     }
 
+    /**
+     * Code the transformations to perform in the course in
+     * order to get transportable (encoded) links
+     */
+    static public function encode_content_links($content) {
+        global $CFG;
+
+        $base = preg_quote($CFG->wwwroot,"/");
+
+        // Link to the course main page (it also covers "&topic=xx" and "&week=xx"
+        // because they don't become transformed (section number) in backup/restore
+        $search = '/(' . $base . '\/course\/view.php\?id\=)([0-9]+)/';
+        $content= preg_replace($search, '$@COURSEVIEWBYID*$2@$', $content);
+
+        return $content;
+    }
+
 // Protected API starts here
 
     /**

backup/moodle2/backup_xml_transformer.class.php

@@ -110,7 +110,10 @@ class backup_xml_transformer extends xml_contenttransformer {
     private function register_link_encoders() {
         $encoders = array();
 
-        // First of all, add the module ones. Each module supporting moodle2 backups MUST have it
+        // Add the course encoder
+        $encoders['backup_course_task'] = 'encode_content_links';
+
+        // Add the module ones. Each module supporting moodle2 backups MUST have it
         $mods = get_plugin_list('mod');
         foreach ($mods as $mod => $moddir) {
             if (plugin_supports('mod', $mod, FEATURE_BACKUP_MOODLE2)) {
@@ -118,7 +121,7 @@ class backup_xml_transformer extends xml_contenttransformer {
             }
         }
 
-        // Add the block encodes
+        // Add the block encoders
         $blocks = get_plugin_list('block');
         foreach ($blocks as $block => $blockdir) {
             if (class_exists('backup_' . $block . '_block_task')) {