/**
  * Display form to edit an announcement type.
  * @param $args array
  * @param $request PKPRequest
  * @return JSONMessage JSON object
  */
 function editAnnouncementType($args, $request)
 {
     $announcementTypeId = (int) $request->getUserVar('announcementTypeId');
     $context = $request->getContext();
     $contextId = $context->getId();
     $announcementTypeForm = new AnnouncementTypeForm($contextId, $announcementTypeId);
     $announcementTypeForm->initData($args, $request);
     return new JSONMessage(true, $announcementTypeForm->fetch($request));
 }