ISSUE-345: UnauthorizedSubscriber

Author: tatevikg1

src/Controller/AuthController.php

@@ -29,6 +29,11 @@ public function login(Request $request): Response
         }
 
         $error = null;
+        $session = $request->getSession();
+        if ($session->has('login_error')) {
+            $error = $session->get('login_error');
+            $session->remove('login_error');
+        }
 
         if ($request->isMethod('POST')) {
             $username = $request->request->get('username');

src/EventSubscriber/UnauthorizedSubscriber.php

@@ -5,12 +5,21 @@
 namespace PhpList\WebFrontend\EventSubscriber;
 
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpKernel\Event\ExceptionEvent;
 use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use GuzzleHttp\Exception\ClientException;
 
 class UnauthorizedSubscriber implements EventSubscriberInterface
 {
+    private UrlGeneratorInterface $urlGenerator;
+
+    public function __construct(UrlGeneratorInterface $urlGenerator)
+    {
+        $this->urlGenerator = $urlGenerator;
+    }
+
     public static function getSubscribedEvents(): array
     {
         return [
@@ -23,7 +32,19 @@ public function onKernelException(ExceptionEvent $event): void
         $exception = $event->getThrowable();
 
         if ($exception instanceof ClientException && $exception->getCode() === 401) {
-            // Redirect to login page or handle unauthorized access
+            $request = $event->getRequest();
+            $session = $request->getSession();
+
+            if ($session->has('auth_token')) {
+                $session->remove('auth_token');
+            }
+
+            $session->set('login_error', 'Your session has expired. Please log in again.');
+
+            $loginUrl = $this->urlGenerator->generate('login');
+            $response = new RedirectResponse($loginUrl);
+
+            $event->setResponse($response);
         }
     }
 }