feat: basic themes for event sites

src/Controller/Booking/Create/IndexController.php

@@ -72,6 +72,9 @@ class IndexController extends AbstractController
             // Store optional return URL in session (defaults to main EP site)
             $this->bookingService->storeReturnUrl($request, $params->returnUrl);
 
+            // Store theme for consistent styling throughout the booking flow
+            $this->bookingService->storeTheme($request, $params->theme);
+
             // Create fresh booking session with the provided parameters
             $bookingDto = $this->bookingService->startFreshBooking($request, $dateId, $hotelId, $agencyId);
 

src/Form/Service/ParticipantFieldOptionsProvider.php

@@ -158,7 +158,6 @@ class ParticipantFieldOptionsProvider extends AbstractFieldOptionsProvider
                 if (true === $service->mandatory) {
                     $attributes['checked'] = true;
                     $attributes['readonly'] = true;
-                    $attributes['class'] = 'text-pink';
                     $attributes['data-tooltip'] = 'Diese Leistung ist nicht abwählbar';
                 }
 

src/Model/BookingQueryParams.php

@@ -25,5 +25,6 @@ readonly class BookingQueryParams
 
         #[SerializedName('r')]
         public ?string $returnUrl = null,
-    ) {}
+    ) {
+    }
 }

src/Service/BookingService.php

@@ -20,6 +20,8 @@ class BookingService
     public const BOOKING_EDIT_KEY = 'booking_edit';
     public const RETURN_URL_KEY = 'booking_return_url';
     public const DEFAULT_RETURN_URL = 'https://www.ep-reisen.de';
+    public const THEME_KEY = 'booking_theme';
+    public const DEFAULT_THEME = 'base';
 
     public function __construct(
         private readonly TravelDataService $travelDataService,
@@ -188,6 +190,33 @@ class BookingService
         return $request->getSession()->get(self::RETURN_URL_KEY, self::DEFAULT_RETURN_URL);
     }
 
+    /**
+     * Stores the theme identifier in the session.
+     *
+     * Sanitizes the theme value to allow only alphanumeric characters and hyphens.
+     * Falls back to the default theme if empty or invalid.
+     */
+    public function storeTheme(Request $request, string $theme): void
+    {
+        $sanitized = preg_replace('/[^a-zA-Z0-9-]/', '', $theme);
+
+        if ('' === $sanitized) {
+            $sanitized = self::DEFAULT_THEME;
+        }
+
+        $request->getSession()->set(self::THEME_KEY, $sanitized);
+    }
+
+    /**
+     * Retrieves the theme identifier from the session.
+     *
+     * Returns the default theme if not set in session.
+     */
+    public function getTheme(Request $request): string
+    {
+        return $request->getSession()->get(self::THEME_KEY, self::DEFAULT_THEME);
+    }
+
     /**
      * Creates a fresh booking session with the provided travel parameters.
      *

src/Twig/AppExtension.php

@@ -30,6 +30,7 @@ class AppExtension extends AbstractExtension
             new TwigFunction('is_static_text', [AppRuntime::class, 'isStaticText']),
             new TwigFunction('is_hidden', [AppRuntime::class, 'isHidden']),
             new TwigFunction('collect_invalid_field_labels', [AppRuntime::class, 'collectInvalidFieldLabels']),
+            new TwigFunction('booking_theme', [AppRuntime::class, 'getBookingTheme']),
         ];
     }
 }

src/Twig/AppRuntime.php

@@ -6,8 +6,10 @@ use App\BusProNet\DataProvider\CountryDataProvider;
 use App\Form\Model\BookingDto;
 use App\Form\Service\CreateFieldStateProvider;
 use App\Form\Service\EditFieldStateProvider;
+use App\Service\BookingService;
 use App\Service\ParticipantEligibilityService;
 use Symfony\Component\Form\FormView;
+use Symfony\Component\HttpFoundation\RequestStack;
 use Twig\Environment;
 use Twig\Extension\RuntimeExtensionInterface;
 use Twig\Extra\Intl\IntlExtension;
@@ -20,6 +22,7 @@ class AppRuntime implements RuntimeExtensionInterface
         private readonly ParticipantEligibilityService $participantEligibilityService,
         private readonly CreateFieldStateProvider $createFieldStateProvider,
         private readonly EditFieldStateProvider $editFieldStateProvider,
+        private readonly RequestStack $requestStack,
         private readonly string $environment,
     ) {
     }
@@ -211,6 +214,21 @@ class AppRuntime implements RuntimeExtensionInterface
         return $labels;
     }
 
+    /**
+     * Returns the current booking theme from session.
+     *
+     * Defaults to 'base' if no theme is set.
+     */
+    public function getBookingTheme(): string
+    {
+        $request = $this->requestStack->getCurrentRequest();
+        if (null === $request) {
+            return BookingService::DEFAULT_THEME;
+        }
+
+        return $request->getSession()->get(BookingService::THEME_KEY, BookingService::DEFAULT_THEME);
+    }
+
     /**
      * Gets the appropriate field state provider based on booking mode.
      *