/**
  * Handle delete event
  * 
  * called by ilTaskScheduler
  * 
  * @param ilECSSetting $a_server
  * @param int $a_econtent_id
  * @param int $a_mid
  * @return boolean
  */
 public function handleDelete(ilECSSetting $a_server, $a_econtent_id, $a_mid = 0)
 {
     global $tree, $ilLog;
     include_once './Services/WebServices/ECS/classes/class.ilECSImport.php';
     // there is no information about the original mid anymore.
     // Therefor delete any remote objects with given econtent id
     $obj_ids = ilECSImport::_lookupObjIds($a_server->getServerId(), $a_econtent_id);
     $ilLog->write(__METHOD__ . ': Received obj_ids ' . print_r($obj_ids, true));
     foreach ($obj_ids as $obj_id) {
         $references = ilObject::_getAllReferences($obj_id);
         foreach ($references as $ref_id) {
             if ($tmp_obj = ilObjectFactory::getInstanceByRefId($ref_id, false)) {
                 $ilLog->write(__METHOD__ . ': Deleting obsolete remote course: ' . $tmp_obj->getTitle());
                 $tmp_obj->delete();
                 $tree->deleteTree($tree->getNodeData($ref_id));
             }
             unset($tmp_obj);
         }
     }
     return true;
 }
 /**
  * Handle delete event
  * 
  * called by ilTaskScheduler
  * 
  * @param ilECSSetting $a_server
  * @param int $a_econtent_id
  * @param int $a_mid
  * @return boolean
  */
 public function handleDelete(ilECSSetting $a_server, $a_econtent_id, $a_mid = 0)
 {
     global $tree, $ilLog;
     include_once './Services/WebServices/ECS/classes/class.ilECSImport.php';
     // if mid is zero delete all obj_ids
     if (!$a_mid) {
         $obj_ids = ilECSImport::_lookupObjIds($a_server->getServerId(), $a_econtent_id);
     } else {
         $obj_ids = (array) ilECSImport::_lookupObjId($a_server->getServerId(), $a_econtent_id, $a_mid);
     }
     $ilLog->write(__METHOD__ . ': Received obj_ids ' . print_r($obj_ids, true));
     foreach ($obj_ids as $obj_id) {
         $references = ilObject::_getAllReferences($obj_id);
         foreach ($references as $ref_id) {
             if ($tmp_obj = ilObjectFactory::getInstanceByRefId($ref_id, false)) {
                 $ilLog->write(__METHOD__ . ': Deleting obsolete remote course: ' . $tmp_obj->getTitle());
                 $tmp_obj->delete();
                 $tree->deleteTree($tree->getNodeData($ref_id));
             }
             unset($tmp_obj);
         }
     }
     return true;
 }