/**
  * This function overrides CRM_CorePage_File::run
  * If we are trying to access a SecureFile offsite
  * we run this function. If we determine that we
  * aren't retrieving this file, fallback on the
  * core run function: parent::run()
  *
  * It is used for Download/View and Delete
  *
  */
 public function run()
 {
     $id = CRM_Utils_Request::retrieve('id', 'Positive', $this, TRUE);
     $eid = CRM_Utils_Request::retrieve('eid', 'Positive', $this, TRUE);
     $runParent = true;
     if (is_numeric($id)) {
         $file = civicrm_api3('File', 'getsingle', array('id' => $id));
         $details = json_decode($file['description']);
         if ($details && property_exists($details, "source") && $details->source == "securefiles") {
             $action = CRM_Utils_Request::retrieve('action', 'String', $this);
             //Check Extension level permissions
             CRM_Securefiles_Permission::checkFilePerms(CRM_Core_Action::ADD, $id, $eid);
             $backendService = CRM_Securefiles_Backend::getBackendService();
             if ($backendService) {
                 if (!($action & CRM_Core_Action::DELETE)) {
                     //Check backend service permissions
                     if ($backendService->checkPermissions(CRM_Core_Action::VIEW, $id, $eid) !== false) {
                         $content = $backendService->downloadFile($file['uri'], $eid);
                         CRM_Utils_System::download($file['uri'], $file['mime_type'], $content);
                     } else {
                         return null;
                     }
                 }
                 //Skip delegating back to the core file handler
                 $runParent = false;
             }
         }
     }
     if ($runParent) {
         parent::run();
     }
 }
 public function run()
 {
     $entityID = CRM_Utils_Request::retrieve('entityID', 'Positive', CRM_Core_DAO::$_nullObject, TRUE);
     $fileID = CRM_Utils_Request::retrieve('fileID', 'Positive', CRM_Core_DAO::$_nullObject, TRUE);
     $file = false;
     if (is_numeric($fileID)) {
         $file = civicrm_api3('File', 'getsingle', array('id' => $fileID));
     }
     try {
         CRM_Core_BAO_File::deleteAttachment();
     } catch (Exception $e) {
         return null;
     }
     //Do the backend-service delete
     if ($file && !empty($file['description'])) {
         $details = json_decode($file['description']);
         if ($details && property_exists($details, "source") && $details->source == "securefiles") {
             //Check extension level permissions
             CRM_Securefiles_Permission::checkFilePerms(CRM_Core_Action::DELETE, $fileID, $entityID);
             $backendService = CRM_Securefiles_Backend::getBackendService();
             if ($backendService) {
                 //Check backend service permissions
                 if ($backendService->checkPermissions(CRM_Core_Action::DELETE, $fileID, $entityID) !== false) {
                     $backendService->deleteFile($file['uri'], $entityID);
                 }
             }
         }
     }
 }