wip: booking process, room assignment

src/Controller/Booking/BookingCreateTrait.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Booking;
+
+use App\Form\Model\BookingCreateDto;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+
+/**
+ * Provides common functionality for booking creation controllers.
+ *
+ * This trait contains shared validation and redirect logic used across
+ * all booking creation steps to ensure consistent behavior and reduce
+ * code duplication.
+ */
+trait BookingCreateTrait
+{
+    /**
+     * Validates step access and redirects if necessary.
+     *
+     * @param BookingCreateDto $bookingCreateDto
+     * @param int $expectedStep
+     */
+    private function validateStepAccess(BookingCreateDto $bookingCreateDto, int $expectedStep): void
+    {
+        // Allow access to current step or any previous step
+        if ($expectedStep > $bookingCreateDto->currentStep) {
+            $this->addFlash('error', 'Bitte erst die vorherigen Schritte abschließen.');
+
+            $this->redirectToCurrentStep($bookingCreateDto);
+        }
+    }
+
+    /**
+     * Redirects to the current step based on the DTO's currentStep.
+     *
+     * @param BookingCreateDto $bookingCreateDto
+     */
+    private function redirectToCurrentStep(BookingCreateDto $bookingCreateDto): RedirectResponse
+    {
+        $routeParams = [
+            'date_id' => $bookingCreateDto->travelData->id,
+            'hotel_id' => $bookingCreateDto->travelData->hotelId,
+        ];
+
+        $route = match ($bookingCreateDto->currentStep) {
+            1 => 'app_booking_create_step_1',
+            2 => 'app_booking_create_step_2',
+            3 => 'app_booking_create_step_3',
+            default => 'app_booking_create_step_1',
+        };
+
+        return $this->redirectToRoute($route, $routeParams);
+    }
+}