fix(Kobo): Get State returns an empty response all the time

src/Controller/Kobo/KoboStateController.php

@@ -18,7 +18,6 @@
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\HttpKernel\Exception\HttpException;
 use Symfony\Component\Routing\Attribute\Route;
 use Symfony\Component\Serializer\SerializerInterface;
 
@@ -88,10 +87,23 @@ public function state(KoboDevice $kobo, string $uuid, Request $request): Respons
     #[Route('/v1/library/{uuid}/state', name: 'api_endpoint_v1_getstate', requirements: ['uuid' => '^[a-zA-Z0-9\-]+$'], methods: ['GET'])]
     public function getState(KoboDevice $kobo, string $uuid, Request $request): Response|JsonResponse
     {
+        // Get State returns an empty response
+        $response = new JsonResponse([]);
+        $response->headers->set('x-kobo-api-token', 'e30=');
+
+        $book = $this->bookRepository->findByUuidAndKoboDevice($uuid, $kobo);
+
+        // Empty response if we know the book
+        if ($book instanceof Book) {
+            return $response;
+        }
+
+        // If we do not know the book, we forward the query to the proxy
         if ($this->koboStoreProxy->isEnabled()) {
             return $this->koboStoreProxy->proxyOrRedirect($request);
         }
-        throw new HttpException(200, 'Not implemented');
+
+        return $response->setStatusCode(Response::HTTP_NOT_IMPLEMENTED);
     }
 
     private function handleBookmark(KoboDevice $kobo, Book $book, ?Bookmark $currentBookmark): void

src/Controller/Kobo/KoboTagController.php

@@ -63,8 +63,7 @@ public function delete(Request $request, KoboDevice $kobo, string $shelfId): Res
         }
         $this->shelfRepository->flush();
 
-        // TODO Find the response format for this
-        return new JsonResponse([], Response::HTTP_NOT_IMPLEMENTED);
+        return new JsonResponse($shelfId, Response::HTTP_CREATED);
     }
 
     #[Route('/v1/library/tags')]