Added Validation to API requests.

- Added Symfony Validation Lib.
- Updated API DTOs to include validation constraints.

src/Controller/BookingController.php

@@ -5,7 +5,6 @@ namespace App\Controller;
 use App\ApiErrorException;
 use App\DTO\ApiErrorMessage;
 use App\Entity\Booking;
-use App\Entity\BookingCustomer;
 use App\Entity\BookingRoom;
 use App\Repository\BookingRepository;
 use App\Repository\RoomCategoryRepository;
@@ -18,8 +17,6 @@ use Doctrine\ORM\EntityManagerInterface;
 use Nelmio\ApiDocBundle\Annotation\Model;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\JsonResponse;
-use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpKernel\Exception\HttpException;
 use Symfony\Component\Routing\Attribute\Route;
 use OpenApi\Attributes as OA;
 use Symfony\Component\HttpKernel\Attribute\MapRequestPayload;
@@ -51,10 +48,6 @@ class BookingController extends AbstractController
         #[MapRequestPayload()] BookingDetailsRequest $detailsRequest
     ): JsonResponse {
 
-        if (\is_null($detailsRequest)) {
-            throw new ApiErrorException(new ApiErrorMessage(400, ApiErrorMessage::TYPE_INVALID_REQUEST_BODY_FORMAT));
-        }
-
         $selectedBooking = $repoBooking->findOneBy(["refNumber" => $detailsRequest->refNumber]);
         if (\is_null($selectedBooking)) {
             throw new NotFoundHttpException('Booking not found');
@@ -87,18 +80,12 @@ class BookingController extends AbstractController
         )
     )]
     public function newBooking(
-        Request $request,
         EntityManagerInterface $entityManager,
         RoomCategoryRepository $repoCat,
         RoomAvailabilityRepository $repoAvailability,
         PricesService $priceSrv,
         #[MapRequestPayload()] BookingCreateRequest $createRequest
     ): JsonResponse {
-        if (\is_null($createRequest)) {
-            throw new ApiErrorException(
-                new ApiErrorMessage(400, ApiErrorMessage::TYPE_INVALID_REQUEST_BODY_FORMAT)
-            );
-        }
 
         $booking = new Booking();
         try {