feat : add branch name generation endpoint

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/State/GiteaBranchNameProvider.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\ApiResource\GiteaBranchName;
+use App\Entity\Task;
+use App\Service\GiteaApiService;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+final readonly class GiteaBranchNameProvider implements ProviderInterface
+{
+    private const array ALLOWED_TYPES = ['feature', 'fix', 'refactor', 'hotfix', 'chore'];
+
+    public function __construct(
+        private GiteaApiService $giteaApiService,
+        private EntityManagerInterface $em,
+    ) {}
+
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): GiteaBranchName
+    {
+        $task = $this->em->getRepository(Task::class)->find($uriVariables['taskId'] ?? 0);
+        if (null === $task) {
+            throw new NotFoundHttpException('Task not found.');
+        }
+
+        $type = $uriVariables['type'] ?? 'feature';
+        if (!in_array($type, self::ALLOWED_TYPES, true)) {
+            throw new BadRequestHttpException('Invalid branch type.');
+        }
+
+        $dto       = new GiteaBranchName();
+        $dto->name = $this->giteaApiService->generateBranchName($task, $type);
+
+        return $dto;
+    }
+}