* slide position handling

src/App/Handler/SlidePositionHandler.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Handler;
+
+use App\Service\SlideManager;
+use Psr\Http\Message\ServerRequestInterface;
+use Zend\Diactoros\Response\JsonResponse;
+
+class SlidePositionHandler extends AbstractCrudHandler
+{
+    /** @var SlideManager */
+    private $slideManager;
+
+    public function __construct(SlideManager $teamService)
+    {
+        $this->slideManager = $teamService;
+    }
+
+    /**
+     * @param ServerRequestInterface $request
+     * @return JsonResponse
+     * @throws \Doctrine\ORM\ORMException
+     * @throws \Doctrine\ORM\OptimisticLockException
+     */
+    public function update(ServerRequestInterface $request)
+    {
+        $id = $request->getAttribute('id');
+        $data = $this->getRequestData($request);
+        try {
+            return new JsonResponse($this->slideManager->changePosition((int)$id, (int)$data['position']));
+        } catch (\InvalidArgumentException $e) {
+            return new JsonResponse([
+                'message' => $e->getMessage(),
+            ], 500);
+        }
+    }
+}

src/App/Handler/SlidePositionHandlerFactory.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Handler;
+
+use App\Service\SlideManager;
+use Psr\Container\ContainerInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class SlidePositionHandlerFactory
+{
+    /**
+     * @param ContainerInterface $container
+     * @return RequestHandlerInterface
+     */
+    public function __invoke(ContainerInterface $container) : RequestHandlerInterface
+    {
+        $slideManager = $container->get(SlideManager::class);
+        return new SlidePositionHandler($slideManager);
+    }
+}