wip: form refactoring

src/Controller/Booking/CreateStep1Controller.php

@@ -23,8 +23,7 @@ class CreateStep1Controller extends AbstractController
 
     public function __construct(
         private readonly BookingService $bookingService,
-    )
+    ) {
-    {
     }
 
     /**
@@ -34,6 +33,10 @@ class CreateStep1Controller extends AbstractController
     public function index(Request $request): Response
     {
         $bookingCreateDto = $this->bookingService->getOrCreateBookingCreateDto($request);
+
+        // Capture the current room selection state before form processing
+        $oldRoomSelectionSnapshot = $this->bookingService->createRoomSelectionSnapshot($bookingCreateDto);
+
         $summary = $this->bookingService->getRoomSummaryAndParticipantCount($bookingCreateDto);
 
         // Validate step access - allow step 1 or redirect to current step
@@ -46,6 +49,9 @@ class CreateStep1Controller extends AbstractController
         $form->handleRequest($request);
 
         if ($form->isSubmitted() && $form->isValid()) {
+            if ($this->bookingService->hasRoomSelectionChanged($oldRoomSelectionSnapshot, $bookingCreateDto)) {
+                $this->bookingService->resetParticipantAssignments($bookingCreateDto);
+            }
             $bookingCreateDto->currentStep = 2;
             $this->bookingService->saveBookingCreateDto($request, $bookingCreateDto);
 
@@ -80,8 +86,6 @@ class CreateStep1Controller extends AbstractController
         ]);
         $form->handleRequest($request);
 
-        $this->bookingService->saveBookingCreateDto($request, $bookingCreateDto);
-
         $summary = $this->bookingService->getRoomSummaryAndParticipantCount($bookingCreateDto);
         $availableRooms = $bookingCreateDto->travel->getAvailableRooms();
         $groupedSelectedRooms = $this->bookingService->groupRoomSelectionsByType($summary['selectedRooms'], $availableRooms);

src/Controller/Booking/CreateStep2Controller.php

@@ -27,8 +27,7 @@ class CreateStep2Controller extends AbstractController
 
     public function __construct(
         private readonly BookingService $bookingService,
-    )
+    ) {
-    {
     }
 
     /**

src/Form/BookingCreateParticipantType.php

@@ -3,9 +3,8 @@
 namespace App\Form;
 
 use App\BusProNet\Form\CountryType;
-use App\Form\Model\BookingCreateDto;
-use App\Form\Model\ParticipantDto;
 use App\Form\Model\BookingDtoInterface;
+use App\Form\Model\ParticipantDto;
 use App\Form\Service\ParticipantFieldOptionsProvider;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\BirthdayType;
@@ -85,14 +84,12 @@ class BookingCreateParticipantType extends AbstractType
             return;
         }
 
-        // Traverse up the form tree to get the root form's data.
+        // Get the booking DTO from the root form
-        $rootForm = $form;
+        $bookingDto = $this->fieldOptionsProvider->getBookingDtoFromForm($form);
-        while ($rootForm->getParent()) {
-            $rootForm = $rootForm->getParent();
-        }
 
-        /** @var BookingDtoInterface $bookingDto */
+        if (null === $bookingDto) {
-        $bookingDto = $rootForm->getData();
+            return;
+        }
 
         $this->addDynamicFields($form, $bookingDto, $participantData->index);
         $this->applyFieldStates($form, $bookingDto, $participantData->index);
@@ -110,14 +107,8 @@ class BookingCreateParticipantType extends AbstractType
             return;
         }
 
-        // Get the root form data to access BookingDtoInterface
+        // Get the booking DTO from the root form
-        $rootForm = $form;
+        $bookingDto = $this->fieldOptionsProvider->getBookingDtoFromForm($form);
-        while ($rootForm->getParent()) {
-            $rootForm = $rootForm->getParent();
-        }
-
-        /** @var BookingDtoInterface $bookingDto */
-        $bookingDto = $rootForm->getData();
 
         if (null === $bookingDto) {
             return;

src/Form/BookingEditParticipantType.php

@@ -7,7 +7,6 @@ use App\BusProNet\Form\CountryType;
 use App\BusProNet\Model\Pickup;
 use App\BusProNet\Model\Service;
 use App\Form\Model\ParticipantDto;
-use App\Form\Model\BookingDtoInterface;
 use App\Form\Service\EditFieldStateProvider;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\BirthdayType;
@@ -23,7 +22,8 @@ class BookingEditParticipantType extends AbstractType
 {
     public function __construct(
         private readonly EditFieldStateProvider $fieldStateProvider,
-    ) {}
+    ) {
+    }
 
     public function buildForm(FormBuilderInterface $builder, array $options): void
     {
@@ -39,13 +39,12 @@ class BookingEditParticipantType extends AbstractType
 
             $form = $event->getForm();
 
-            // Traverse up the form tree to get the root form's data (BookingEditDto)
+            // Get the booking DTO from the root form
-            $rootForm = $form;
+            $bookingDto = $this->fieldStateProvider->getBookingDtoFromForm($form);
-            while ($rootForm->getParent()) {
+
-                $rootForm = $rootForm->getParent();
+            if (null === $bookingDto) {
+                return;
             }
-            /** @var BookingDtoInterface $bookingDto */
-            $bookingDto = $rootForm->getData();
 
             // Helper to get state for a field
             $getState = fn (string $field) => $this->fieldStateProvider->getFieldState($field, $bookingDto, $participantIndex);
@@ -285,13 +284,12 @@ class BookingEditParticipantType extends AbstractType
                     return;
                 }
 
-                // Traverse up the form tree to get the root form's data (BookingEditDto)
+                // Get the booking DTO from the root form
-                $rootForm = $form;
+                $bookingDto = $this->fieldStateProvider->getBookingDtoFromForm($form);
-                while ($rootForm->getParent()) {
+
-                    $rootForm = $rootForm->getParent();
+                if (null === $bookingDto) {
+                    return;
                 }
-                /** @var BookingDtoInterface $bookingDto */
-                $bookingDto = $rootForm->getData();
                 $participantIndex = $form->getData()->index;
 
                 // Helper to get state for a field based on submitted data
@@ -299,7 +297,7 @@ class BookingEditParticipantType extends AbstractType
 
                 // Re-apply field states to all personal data fields
                 $personalDataFields = [
-                    'firstName', 'lastName', 'dateOfBirth', 'gender', 'nationality', 'email', 'mobile'
+                    'firstName', 'lastName', 'dateOfBirth', 'gender', 'nationality', 'email', 'mobile',
                 ];
                 foreach ($personalDataFields as $field) {
                     if ($form->has($field)) {
@@ -389,6 +387,7 @@ class BookingEditParticipantType extends AbstractType
                 $fieldOptions[$key] = $value;
             }
         }
+
         return $fieldOptions;
     }
 }

src/Form/Model/BookingCreateDto.php

@@ -40,11 +40,6 @@ class BookingCreateDto implements BookingDtoInterface
         return $this->participants;
     }
 
-    public function getTravel(): Travel
-    {
-        return $this->travel;
-    }
-
     public function hasParticipant(int $index): bool
     {
         return isset($this->participants[$index]);

src/Form/Model/BookingDtoInterface.php

@@ -4,8 +4,6 @@ declare(strict_types=1);
 
 namespace App\Form\Model;
 
-use App\BusProNet\Model\Travel;
-
 /**
  * Interface for unified access to booking data across create and edit workflows.
  *
@@ -23,13 +21,6 @@ interface BookingDtoInterface
      */
     public function getParticipants(): array;
 
-    /**
-     * Gets the travel data for the booking.
-     *
-     * @return Travel The travel data containing services, hotels, and other booking options
-     */
-    public function getTravel(): Travel;
-
     /**
      * Checks if a participant exists at the given index.
      *
@@ -47,11 +38,4 @@ interface BookingDtoInterface
      * @return ParticipantDto|null The participant DTO or null if not found
      */
     public function getParticipant(int $index): ?ParticipantDto;
-
-    /**
-     * Gets all selected rooms for the booking.
-     *
-     * @return array<int, RoomSelectionDto> Array of selected room DTOs (may be empty for edit DTOs)
-     */
-    public function getSelectedRooms(): array;
 }

src/Form/Model/BookingEditDto.php

@@ -10,18 +10,19 @@ use Symfony\Component\Validator\Constraints as Assert;
 
 class BookingEditDto implements BookingDtoInterface
 {
-    public ?Booking $booking = null;
-    public ?Travel $travel = null;
-
     /**
      * @var array<int, ParticipantDto>
      */
     #[Assert\Valid]
     public array $participants = [];
 
+    public function __construct(public Booking $booking, public Travel $travel)
+    {
+    }
+
     public static function fromBooking(Booking $booking, Travel $travel): static
     {
-        $instance = new static();
+        $instance = new static($booking, $travel);
 
         $instance->booking = $booking;
         $instance->travel = $travel;
@@ -69,11 +70,6 @@ class BookingEditDto implements BookingDtoInterface
         return $this->participants;
     }
 
-    public function getTravel(): Travel
-    {
-        return $this->travel;
-    }
-
     public function hasParticipant(int $index): bool
     {
         return isset($this->participants[$index]);
@@ -87,7 +83,7 @@ class BookingEditDto implements BookingDtoInterface
     /**
      * Gets all selected rooms for the booking (edit context).
      *
-     * @return array<int, RoomSelectionDto> Always returns an empty array for edit DTOs unless implemented.
+     * @return array<int, RoomSelectionDto> always returns an empty array for edit DTOs unless implemented
      */
     public function getSelectedRooms(): array
     {

src/Form/ParticipantFieldHandler/ParticipantAssignedRoomFieldHandler.php

@@ -4,7 +4,6 @@ declare(strict_types=1);
 
 namespace App\Form\ParticipantFieldHandler;
 
-use App\Form\Model\BookingCreateDto;
 use App\Form\Model\BookingDtoInterface;
 
 /**

src/Form/ParticipantFieldHandler/ParticipantFieldHandlerRegistry.php

@@ -4,7 +4,6 @@ declare(strict_types=1);
 
 namespace App\Form\ParticipantFieldHandler;
 
-use App\Form\Model\BookingCreateDto;
 use App\Form\Model\BookingDtoInterface;
 
 /**

src/Form/Service/EditFieldStateProvider.php

@@ -5,10 +5,10 @@ declare(strict_types=1);
 namespace App\Form\Service;
 
 use App\Form\Model\BookingDtoInterface;
-use App\Form\ParticipantFieldHandler\Condition\FieldConditionInterface;
-use App\Form\ParticipantFieldHandler\Condition\MutabilityCondition;
 use App\Form\ParticipantFieldHandler\Condition\ApplicantCondition;
 use App\Form\ParticipantFieldHandler\Condition\CompositeCondition;
+use App\Form\ParticipantFieldHandler\Condition\FieldConditionInterface;
+use App\Form\ParticipantFieldHandler\Condition\MutabilityCondition;
 
 /**
  * Field state provider for the booking edit workflow.
@@ -21,6 +21,8 @@ use App\Form\ParticipantFieldHandler\Condition\CompositeCondition;
  */
 class EditFieldStateProvider implements FieldStateProviderInterface
 {
+    use FormTraversalTrait;
+
     /** @var array<string, array<string, FieldConditionInterface>> */
     private array $fieldStateConditions = [];
 
@@ -109,6 +111,7 @@ class EditFieldStateProvider implements FieldStateProviderInterface
         foreach ($this->fieldStateConditions[$fieldName] as $condition) {
             $dependencies = array_merge($dependencies, $condition->getDependentFields());
         }
+
         return array_unique($dependencies);
     }
 
@@ -121,6 +124,7 @@ class EditFieldStateProvider implements FieldStateProviderInterface
                 $allStates[$fieldName] = $fieldState;
             }
         }
+
         return $allStates;
     }
 }

src/Form/Service/FormTraversalTrait.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Service;
+
+use App\Form\Model\BookingDtoInterface;
+use Symfony\Component\Form\FormInterface;
+
+/**
+ * Trait providing form tree traversal utilities.
+ *
+ * This trait contains common form navigation logic used across different
+ * form services and types. It centralizes the logic for finding root forms
+ * and extracting booking DTOs from form hierarchies.
+ */
+trait FormTraversalTrait
+{
+    /**
+     * Gets the BookingDtoInterface from the root of the form tree.
+     *
+     * This helper method traverses up the form tree to find the root form
+     * and extracts the BookingDtoInterface data. This is shared logic used
+     * by both create and edit participant forms.
+     *
+     * @param FormInterface $form The form to start traversing from
+     *
+     * @return BookingDtoInterface|null The booking DTO or null if not found
+     */
+    public function getBookingDtoFromForm(FormInterface $form): ?BookingDtoInterface
+    {
+        // Traverse up the form tree to get the root form's data
+        $rootForm = $form;
+        while ($rootForm->getParent()) {
+            $rootForm = $rootForm->getParent();
+        }
+
+        $data = $rootForm->getData();
+
+        return $data instanceof BookingDtoInterface ? $data : null;
+    }
+}

src/Form/Service/ParticipantFieldOptionsProvider.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Form\Service;
 
+use App\Form\Model\BookingCreateDto;
 use App\Form\Model\BookingDtoInterface;
 use App\Form\ParticipantFieldHandler\Condition\FieldConditionInterface;
 
@@ -26,6 +27,8 @@ use App\Form\ParticipantFieldHandler\Condition\FieldConditionInterface;
  */
 class ParticipantFieldOptionsProvider implements FieldStateProviderInterface
 {
+    use FormTraversalTrait;
+
     /** @var array<string, callable> Field option providers indexed by field name */
     private array $fieldOptionProviders = [];
 
@@ -120,7 +123,7 @@ class ParticipantFieldOptionsProvider implements FieldStateProviderInterface
      */
     private function registerFieldOptionProviders(): void
     {
-        // Room assignment field provider
+        // Room assignment field provider (only available for create workflow)
         $this->fieldOptionProviders['assignedRoomId'] = fn (BookingDtoInterface $bookingDto, int $participantIndex) => [
             'label' => 'Zimmer',
             'placeholder' => 'Bitte wählen',
@@ -128,11 +131,13 @@ class ParticipantFieldOptionsProvider implements FieldStateProviderInterface
             // - Shows only available rooms for this participant
             // - Excludes rooms already assigned to other participants
             // - Respects room capacity and booking constraints
-            'choice_loader' => $this->roomChoiceLoaderFactory->create(
+            'choice_loader' => $bookingDto instanceof BookingCreateDto
+                ? $this->roomChoiceLoaderFactory->create(
                     $bookingDto->participants,
                     $bookingDto->getSelectedRooms(),
                     $participantIndex
-            ),
+                )
+                : null,
         ];
 
         // Future field providers would be added here, for example:

src/Service/BookingService.php

@@ -6,7 +6,6 @@ use App\BusProNet\Model\Room;
 use App\BusProNet\Model\Travel;
 use App\Form\Model\BookingCreateDto;
 use App\Form\Model\RoomSelectionDto;
-use App\Service\TravelDataService;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
@@ -14,8 +13,7 @@ class BookingService
 {
     public function __construct(
         private readonly TravelDataService $travelDataService,
-    ) {
+    ) {}
-    }
 
     public function getOrCreateBookingCreateDto(Request $request): BookingCreateDto
     {
@@ -103,7 +101,6 @@ class BookingService
         return $participantsCount;
     }
 
-
     /**
      * Calculates the number of participants assigned to each room ID.
      *
@@ -124,7 +121,6 @@ class BookingService
     /**
      * Returns a summary of selected rooms and the resulting participant count for a booking.
      *
-     * @param BookingCreateDto $bookingCreateDto
      * @return array{selectedRooms: array, participantCount: int}
      */
     public function getRoomSummaryAndParticipantCount(BookingCreateDto $bookingCreateDto): array
@@ -142,19 +138,20 @@ class BookingService
      * Groups available rooms by selection type ('by_pax' or 'by_room').
      *
      * @param array<int, Room> $rooms Rooms indexed by room ID
+     *
      * @return array{by_pax: array<int, Room>, by_room: array<int, Room>}
      */
     public function groupRoomsBySelectionType(array $rooms): array
     {
         $groups = [
-            'by_pax' => [],
+            Room::SELECTION_TYPE_BY_PAX => [],
-            'by_room' => [],
+            Room::SELECTION_TYPE_BY_ROOM => [],
         ];
         foreach ($rooms as $room) {
-            if (stripos($room->label, 'bett') !== false) {
+            if (false !== stripos($room->label, 'bett')) {
-                $groups['by_pax'][$room->id] = $room;
+                $groups[Room::SELECTION_TYPE_BY_PAX][$room->id] = $room;
             } else {
-                $groups['by_room'][$room->id] = $room;
+                $groups[Room::SELECTION_TYPE_BY_ROOM][$room->id] = $room;
             }
         }
 
@@ -166,13 +163,14 @@ class BookingService
      *
      * @param array            $roomSelections Array of selected RoomSelectionDto
      * @param array<int, Room> $roomsById      Rooms indexed by room ID
+     *
      * @return array{by_pax: array, by_room: array}
      */
     public function groupRoomSelectionsByType(array $roomSelections, array $roomsById): array
     {
         $groups = [
-            'by_pax' => [],
+            Room::SELECTION_TYPE_BY_PAX => [],
-            'by_room' => [],
+            Room::SELECTION_TYPE_BY_ROOM => [],
         ];
         foreach ($roomSelections as $roomSelection) {
             $room = $roomsById[$roomSelection->roomId] ?? null;
@@ -184,4 +182,47 @@ class BookingService
 
         return $groups;
     }
+
+    /**
+     * Determines if the room selection has changed between two DTOs.
+     */
+    public function shouldResetAssignments(BookingCreateDto $oldDto, BookingCreateDto $newDto): bool
+    {
+        $old = array_map(fn($roomSelectionDto) => [$roomSelectionDto->roomId, $roomSelectionDto->quantity], $oldDto->roomSelections);
+        $new = array_map(fn($roomSelectionDto) => [$roomSelectionDto->roomId, $roomSelectionDto->quantity], $newDto->roomSelections);
+
+        return $old !== $new;
+    }
+
+    /**
+     * Resets all participant room assignments in the DTO.
+     */
+    public function resetParticipantAssignments(BookingCreateDto $dto): void
+    {
+        foreach ($dto->participants as $participant) {
+            $participant->assignedRoomId = null;
+        }
+    }
+
+    /**
+     * Creates a snapshot of the current room selection state.
+     *
+     * @return array<int, array{int, int}> Array of [roomId, quantity] pairs
+     */
+    public function createRoomSelectionSnapshot(BookingCreateDto $dto): array
+    {
+        return array_map(
+            fn($roomSelection) => [$roomSelection->roomId, $roomSelection->quantity],
+            $dto->roomSelections
+        );
+    }
+
+    /**
+     * Checks if room selection has changed compared to a previous snapshot.
+     */
+    public function hasRoomSelectionChanged(array $oldSnapshot, BookingCreateDto $newDto): bool
+    {
+        $newSnapshot = $this->createRoomSelectionSnapshot($newDto);
+        return $oldSnapshot !== $newSnapshot;
+    }
 }