/**
  * Display the plugin.
  * @param $args array
  * @param $request PKPRequest
  */
 function display($args, $request)
 {
     $templateMgr = TemplateManager::getManager($request);
     $context = $request->getContext();
     parent::display($args, $request);
     $templateMgr->assign('plugin', $this);
     switch (array_shift($args)) {
         case 'index':
         case '':
             $templateMgr->display($this->getTemplatePath() . 'index.tpl');
             break;
         case 'uploadImportXML':
             $user = $request->getUser();
             import('lib.pkp.classes.file.TemporaryFileManager');
             $temporaryFileManager = new TemporaryFileManager();
             $temporaryFile = $temporaryFileManager->handleUpload('uploadedFile', $user->getId());
             if ($temporaryFile) {
                 $json = new JSONMessage(true);
                 $json->setAdditionalAttributes(array('temporaryFileId' => $temporaryFile->getId()));
             } else {
                 $json = new JSONMessage(false, __('common.uploadFailed'));
             }
             return $json->getString();
         case 'importBounce':
             $json = new JSONMessage(true);
             $json->setEvent('addTab', array('title' => __('plugins.importexport.users.results'), 'url' => $request->url(null, null, null, array('plugin', $this->getName(), 'import'), array('temporaryFileId' => $request->getUserVar('temporaryFileId')))));
             return $json->getString();
         case 'import':
             $temporaryFileId = $request->getUserVar('temporaryFileId');
             $temporaryFileDao = DAORegistry::getDAO('TemporaryFileDAO');
             $user = $request->getUser();
             $temporaryFile = $temporaryFileDao->getTemporaryFile($temporaryFileId, $user->getId());
             if (!$temporaryFile) {
                 $json = new JSONMessage(true, __('plugins.importexport.users.uploadFile'));
                 return $json->getString();
             }
             $temporaryFilePath = $temporaryFile->getFilePath();
             libxml_use_internal_errors(true);
             $users = $this->importUsers(file_get_contents($temporaryFilePath), $context, $user);
             $validationErrors = array_filter(libxml_get_errors(), create_function('$a', 'return $a->level == LIBXML_ERR_ERROR ||  $a->level == LIBXML_ERR_FATAL;'));
             $templateMgr->assign('validationErrors', $validationErrors);
             libxml_clear_errors();
             $templateMgr->assign('users', $users);
             $json = new JSONMessage(true, $templateMgr->fetch($this->getTemplatePath() . 'results.tpl'));
             return $json->getString();
         case 'export':
             $exportXml = $this->exportUsers((array) $request->getUserVar('selectedUsers'), $request->getContext(), $request->getUser());
             import('lib.pkp.classes.file.FileManager');
             $fileManager = new FileManager();
             $exportFileName = $this->getExportFileName($this->getExportPath(), 'users', $context, '.xml');
             $fileManager->writeFile($exportFileName, $exportXml);
             $fileManager->downloadFile($exportFileName);
             $fileManager->deleteFile($exportFileName);
             break;
         case 'exportAllUsers':
             $exportXml = $this->exportAllUsers($request->getContext(), $request->getUser());
             import('lib.pkp.classes.file.TemporaryFileManager');
             $fileManager = new TemporaryFileManager();
             $exportFileName = $this->getExportFileName($this->getExportPath(), 'users', $context, '.xml');
             $fileManager->writeFile($exportFileName, $exportXml);
             $fileManager->downloadFile($exportFileName);
             $fileManager->deleteFile($exportFileName);
             break;
         default:
             $dispatcher = $request->getDispatcher();
             $dispatcher->handle404();
     }
 }