[TASK] Migrate BE Controller

Classes/Controller/BackendController.php

@@ -85,7 +85,7 @@ class BackendController extends ActionController {
 	 * @param array $filters
 	 * @return void
 	 */
-	public function indexAction(array $filters = []): void {
+	public function indexAction(array $filters = []): ?\Psr\Http\Message\ResponseInterface {
 		$pageUid = (int) GeneralUtility::_GP('id');
 
 		// create docheader + buttons
@@ -140,5 +140,23 @@ class BackendController extends ActionController {
 				LocalizationUtility::translate('backend.notice.noRecords', 'SgJobs'), '', FlashMessage::INFO
 			);
 		}
+		if (version_compare(\TYPO3\CMS\Core\Utility\VersionNumberUtility::getCurrentTypo3Version(), '11.0.0', '<')) {
+			return NULL;
+		}
+		else {
+			return $this->createBackendResponse();
+		}
+	}
+
+	/**
+	 * Use the ModuleTemplateResponse to create a response object for the backend
+	 *
+	 * @return  \Psr\Http\Message\ResponseInterface
+	 */
+	protected function createBackendResponse():  \Psr\Http\Message\ResponseInterface
+	{
+		$moduleTemplate = $this->moduleTemplateFactory->create($this->request);
+		$moduleTemplate->setContent($this->view->render());
+		return $this->htmlResponse($moduleTemplate->renderContent());
 	}
 }