wip: refactoring

src/Form/BookingCreateStep2Type.php

@@ -8,21 +8,71 @@ use Symfony\Component\Form\Extension\Core\Type\CollectionType;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\FormEvents;
+use Symfony\Component\Form\FormInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
 class BookingCreateStep2Type extends AbstractType
 {
     public function buildForm(FormBuilderInterface $builder, array $options): void
     {
-        $builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
+        $builder
+            ->addEventListener(FormEvents::PRE_SET_DATA, [$this, 'onPreSetData'])
+            ->addEventListener(FormEvents::PRE_SUBMIT, [$this, 'onPreSubmit'])
+        ;
+    }
+
+    /**
+     * Handles the initial form creation.
+     */
+    public function onPreSetData(FormEvent $event): void
+    {
         /** @var BookingCreateDto|null $data */
         $data = $event->getData();
-            $form = $event->getForm();
-
         if (null === $data) {
             return;
         }
 
+        $this->addParticipantsField($event->getForm(), $data);
+    }
+
+    /**
+     * Handles dynamic updates on POST requests (e.g., from HTMX).
+     *
+     * This listener synchronizes the DTO with the submitted data *before*
+     * the form's children are processed. It then rebuilds the participants
+     * field to ensure choice loaders are created with the fresh state.
+     */
+    public function onPreSubmit(FormEvent $event): void
+    {
+        $form = $event->getForm();
+        $submittedData = $event->getData();
+
+        /** @var BookingCreateDto $bookingDto */
+        $bookingDto = $form->getData();
+
+        // If participant data isn't in the submission, we can't do anything.
+        if (!isset($submittedData['participants']) || !is_array($submittedData['participants'])) {
+            return;
+        }
+
+        // Manually update the DTO with the submitted room assignments.
+        foreach ($submittedData['participants'] as $index => $participantData) {
+            if (isset($participantData['assignedRoomId']) && isset($bookingDto->participants[$index])) {
+                $roomId = $participantData['assignedRoomId'];
+                // An unselected choice submits an empty string.
+                $bookingDto->participants[$index]->assignedRoomId = '' === $roomId ? null : (int) $roomId;
+            }
+        }
+
+        // Now, rebuild the 'participants' field with the updated DTO.
+        $this->addParticipantsField($form, $bookingDto);
+    }
+
+    /**
+     * Adds or replaces the 'participants' collection field on the form.
+     */
+    private function addParticipantsField(FormInterface $form, BookingCreateDto $data): void
+    {
         $form->add('participants', CollectionType::class, [
             'entry_type' => BookingCreateParticipantType::class,
             'allow_add' => false,
@@ -32,7 +82,6 @@ class BookingCreateStep2Type extends AbstractType
                 'selected_rooms' => $data->getSelectedRooms(),
             ],
         ]);
-        });
     }
 
     public function configureOptions(OptionsResolver $resolver): void