feat: prevent booking flow without available rooms

src/Service/BookingService.php

@@ -4,6 +4,7 @@ namespace App\Service;
 
 use App\BusProNet\Model\Room;
 use App\BusProNet\Model\Travel;
+use App\Exception\NoRoomsAvailableException;
 use App\Form\Model\BookingCreateDto;
 use App\Form\Model\RoomSelectionDto;
 use Symfony\Component\HttpFoundation\Request;
@@ -78,6 +79,11 @@ class BookingService
         $roomsIdsAndQuantities = $this->processRoomQuantities($request);
         $availableRooms = $travelData->getAvailableRooms();
 
+        // Prevent booking flow entry when no rooms are available
+        if (empty($availableRooms)) {
+            throw new NoRoomsAvailableException($dateId, $hotelId);
+        }
+
         $roomSelections = array_map(
             fn (Room $room) => $this->createRoomSelection($room, $roomsIdsAndQuantities),
             $availableRooms