feat: automatically assign rooms only for unique room type selection

src/Controller/Booking/Create/Step2Controller.php

@@ -254,6 +254,10 @@ class Step2Controller extends AbstractController
 
     /**
      * Automatically assigns participants to rooms if they don't have room assignments yet.
+     *
+     * Note: Auto-assignment only occurs when exactly one room type is selected.
+     * With multiple room types, users must manually select rooms to avoid UX issues
+     * with having to unselect preassigned rooms in individual participant forms.
      */
     private function autoAssignRoomsIfNeeded(BookingDto $bookingCreateDto): void
     {
@@ -270,5 +274,4 @@ class Step2Controller extends AbstractController
             $this->roomAssignmentService->assignParticipantsToRooms($bookingCreateDto);
         }
     }
-
 }

src/Service/ParticipantCardDataService.php

@@ -103,6 +103,9 @@ class ParticipantCardDataService
 
     /**
      * Calculate and format individual participant price.
+     *
+     * Returns a dash (-) when the price is zero and no room is assigned,
+     * indicating incomplete configuration rather than a zero-cost booking.
      */
     private function getFormattedPrice(BookingDto $bookingDto, int $index): string
     {
@@ -110,6 +113,12 @@ class ParticipantCardDataService
 
         $price = $prices[$index] ?? 0.0;
 
+        // Display dash when price is zero and no room assigned (incomplete configuration)
+        $participant = $bookingDto->participants[$index] ?? null;
+        if (0.0 === $price && (null === $participant || null === $participant->assignedRoomId)) {
+            return '-';
+        }
+
         return number_format($price, 2, ',', '.').' €';
     }
 }

src/Service/RoomAssignmentService.php

@@ -14,6 +14,30 @@ use App\Form\Model\BookingDto;
  */
 class RoomAssignmentService
 {
+    /**
+     * Determines if automatic room assignment should be performed.
+     *
+     * Auto-assignment is only performed when exactly one room type is selected to avoid
+     * UX issues with individual participant forms. With multiple room types, users should
+     * manually select rooms to avoid having to unselect preassigned rooms.
+     *
+     * @param BookingDto $dto The booking DTO containing room selections
+     *
+     * @return bool True if auto-assignment should proceed, false otherwise
+     */
+    public function shouldAutoAssignRooms(BookingDto $dto): bool
+    {
+        $selectedRoomTypeCount = 0;
+
+        foreach ($dto->roomSelections as $roomSelection) {
+            if (null !== $roomSelection->quantity && $roomSelection->quantity > 0) {
+                ++$selectedRoomTypeCount;
+            }
+        }
+
+        return 1 === $selectedRoomTypeCount;
+    }
+
     /**
      * Automatically assigns participants to rooms based on selected room quantities and capacities.
      *
@@ -26,10 +50,17 @@ class RoomAssignmentService
      * - 2x "Doppelzimmer" (capacity 2) = participants 0-1 → room A, participants 2-3 → room A
      * - 1x "3-Bett-Zimmer" (capacity 3) = participants 4-6 → room B
      *
+     * Note: Only performs assignment if shouldAutoAssignRooms() returns true.
+     *
      * @param BookingDto $dto The booking DTO containing room selections and participants
      */
     public function assignParticipantsToRooms(BookingDto $dto): void
     {
+        // Skip auto-assignment if multiple room types selected
+        if (false === $this->shouldAutoAssignRooms($dto)) {
+            return;
+        }
+
         $participantIndex = 0;
         $selectedRooms = $dto->getSelectedRooms();
         $availableRooms = $dto->travel->getAvailableRooms();