public function actionExport()
 {
     $this->requirePostRequest();
     $result = new ArtVandelay_ExportedDataModel(array('assets' => $this->_exportAssets(), 'categories' => $this->_exportCategories(), 'fields' => $this->_exportFields(), 'globals' => $this->_exportGlobals(), 'sections' => $this->_exportSections(), 'tags' => $this->_exportTags()));
     $json = $result->toJson();
     if (craft()->request->getParam('download')) {
         HeaderHelper::setDownload('export.json', strlen($json));
     }
     JsonHelper::sendJsonHeaders();
     echo $json;
     craft()->end();
 }