move supported languages logic to service (#2701)

src/Controller/HomepageController.php

@@ -11,6 +11,7 @@ namespace App\Controller;
 
 use App\Entity\User;
 use App\Form\Type\InitialViewType;
+use App\Utils\LanguageService;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Security;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -27,7 +28,7 @@ class HomepageController extends AbstractController
     /**
      * @Route(path="", defaults={}, name="homepage", methods={"GET"})
      */
-    public function indexAction(Request $request): Response
+    public function indexAction(Request $request, LanguageService $service): Response
     {
         /** @var User $user */
         $user = $this->getUser();
@@ -43,6 +44,12 @@ class HomepageController extends AbstractController
             $userLanguage = $requestLanguage;
         }
 
+        // if a user somehow managed to get a wrong locale into hos account (eg. an imported user from Kimai 1)
+        // make sure that he will still see a beautiful page and not a 404
+        if (!$service->isKnownLanguage($userLanguage)) {
+            $userLanguage = $service->getDefaultLanguage();
+        }
+
         $routes = [
             [$userRoute, $userLanguage],
             [$userRoute, $requestLanguage],