Merge branch 'MDL-46927_master' of git://github.com/markn86/moodle

lib/filebrowser/file_info_context_system.php

@@ -52,16 +52,66 @@ class file_info_context_system extends file_info {
      * @param int $itemid item ID
      * @param string $filepath file path
      * @param string $filename file name
+     * @return file_info|null file_info instance or null if not found or access not allowed
      */
     public function get_file_info($component, $filearea, $itemid, $filepath, $filename) {
         if (empty($component)) {
             return $this;
         }
 
-        // no components supported at this level yet
+        $methodname = "get_area_{$component}_{$filearea}";
+
+        if (method_exists($this, $methodname)) {
+            return $this->$methodname($itemid, $filepath, $filename);
+        }
+
         return null;
     }
 
+    /**
+     * Gets a stored file for the backup course filearea directory.
+     *
+     * @param int $itemid item ID
+     * @param string $filepath file path
+     * @param string $filename file name
+     * @return file_info|null file_info instance or null if not found or access not allowed
+     */
+    protected function get_area_backup_course($itemid, $filepath, $filename) {
+        global $CFG;
+
+        if (!isloggedin()) {
+            return null;
+        }
+
+        if (!has_any_capability(array('moodle/backup:backupcourse', 'moodle/restore:restorecourse'), $this->context)) {
+            return null;
+        }
+
+        if (is_null($itemid)) {
+            return $this;
+        }
+
+        $fs = get_file_storage();
+
+        $filepath = is_null($filepath) ? '/' : $filepath;
+        $filename = is_null($filename) ? '.' : $filename;
+        if (!$storedfile = $fs->get_file($this->context->id, 'backup', 'course', 0, $filepath, $filename)) {
+            if ($filepath === '/' && $filename === '.') {
+                $storedfile = new virtual_root_file($this->context->id, 'backup', 'course', 0);
+            } else {
+                // Not found.
+                return null;
+            }
+        }
+
+        $downloadable = has_capability('moodle/backup:downloadfile', $this->context);
+        $uploadable = has_capability('moodle/restore:uploadfile', $this->context);
+
+        $urlbase = $CFG->wwwroot . '/pluginfile.php';
+        return new file_info_stored($this->browser, $this->context, $storedfile, $urlbase,
+            get_string('coursebackup', 'repository'), false, $downloadable, $uploadable, false);
+    }
+
     /**
      * Returns localised visible name.
      *