feat: replace *Service suffix with role-based class names

src/Service/ParticipantFormSupport.php

@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Exception\ParticipantNotFoundException;
+use App\Form\Model\BookingDto;
+use App\Form\Model\ParticipantDto;
+use App\Form\Model\ParticipantEditDto;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * Shared helpers for participant edit forms in create and edit booking flows.
+ */
+class ParticipantFormSupport
+{
+    public function __construct(
+        private readonly ParameterBagInterface $parameterBag,
+    ) {
+    }
+
+    public function ensureParticipantExists(BookingDto $bookingDto, int $index): ParticipantDto
+    {
+        $participant = $bookingDto->participants[$index] ?? null;
+
+        if (null === $participant) {
+            throw new ParticipantNotFoundException($index);
+        }
+
+        return $participant;
+    }
+
+    public function createParticipantEditDto(BookingDto $bookingDto, int $index): ParticipantEditDto
+    {
+        return new ParticipantEditDto(
+            participant: $this->ensureParticipantExists($bookingDto, $index),
+            bookingContext: $bookingDto,
+        );
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function getParticipantFormOptions(BookingDto $bookingDto, bool $disableValidation = false): array
+    {
+        $options = [
+            'booking_context' => $bookingDto,
+            'height_choices' => $this->parameterBag->get('body_dimensions.height_choices'),
+            'weight_choices' => $this->parameterBag->get('body_dimensions.weight_choices'),
+            'shoe_size_min' => $this->parameterBag->get('body_dimensions.shoe_size_min'),
+            'shoe_size_max' => $this->parameterBag->get('body_dimensions.shoe_size_max'),
+        ];
+
+        if (true === $disableValidation) {
+            $options['validation_groups'] = false;
+        }
+
+        return $options;
+    }
+
+    /**
+     * Collects participant notifications and clears them from the DTO.
+     *
+     * @return array<array{type: string, message: string}>
+     */
+    public function collectAndClearNotifications(BookingDto $bookingDto): array
+    {
+        $notifications = [];
+
+        foreach ($bookingDto->participants as $participant) {
+            if (false === empty($participant->notifications)) {
+                $notifications = array_merge($notifications, $participant->notifications);
+                $participant->notifications = [];
+            }
+        }
+
+        return array_values($notifications);
+    }
+}