feat: authenticated booking

src/Controller/Booking/Create/Step2Controller.php

@@ -15,6 +15,7 @@ use App\Htmx\HxTrait;
 use App\Service\BookingPriceCalculatorService;
 use App\Service\BookingService;
 use App\Service\ParticipantCardDataService;
+use App\Service\ParticipantPrepopulationService;
 use App\Service\RoomAssignmentService;
 use App\Service\TravelDataService;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
@@ -42,6 +43,7 @@ class Step2Controller extends AbstractController
         private readonly RoomAssignmentService $roomAssignmentService,
         private readonly ParticipantCardDataService $participantCardService,
         private readonly ParticipantFieldOptionsProvider $fieldOptionsProvider,
+        private readonly ParticipantPrepopulationService $prepopulationService,
     ) {
     }
 
@@ -227,10 +229,29 @@ class Step2Controller extends AbstractController
         for ($i = 0; $i < $participantsCount; ++$i) {
             $participant = $participants[$i] ?? new ParticipantDto();
             $participant->index = $i;
+
+            // Prepopulate applicant from authenticated user (index 0 only)
+            if (0 === $i && $this->getUser() && $this->shouldPrepopulate($participant)) {
+                $participant = $this->prepopulationService->prepopulateApplicantFromUser(
+                    $this->getUser(),
+                    $participant
+                );
+            }
+
             $bookingCreateDto->participants[$i] = $participant;
         }
     }
 
+    /**
+     * Determines if a participant should be prepopulated.
+     *
+     * Only prepopulates if the participant is "fresh" (no name set yet).
+     */
+    private function shouldPrepopulate(ParticipantDto $participant): bool
+    {
+        return null === $participant->firstName || '' === $participant->firstName;
+    }
+
     /**
      * Enriches travel data with cached availability information from BusProNet API.
      */