move response logic to new view controller

app/View/ViewController.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\View;
+
+use Psr\Http\Message\ResponseInterface as Response;
+use Slim\Views\Twig;
+
+class ViewController
+{
+    public function admin(Response $response, Twig $view): Response
+    {
+        return $view->render($response, 'admin.html.twig', []);
+    }
+}

bootstrap/app.php

@@ -5,6 +5,7 @@ use Psr\Http\Message\ServerRequestInterface as Request;
 use DI\Bridge\Slim\Bridge;
 use Slim\Views\Twig;
 use Slim\Views\TwigMiddleware;
+use App\View\ViewController;
 
 $container = require __DIR__.'/container.php';
 $app = Bridge::create($container);
@@ -14,10 +15,6 @@ $app->add(TwigMiddleware::create($app, $container->get(Twig::class)));
 // change first param to false for production
 $app->addErrorMiddleware(true, true, true);
 
-$app->get('/admin', function (Response $response, Twig $twig) {
+$app->get('/admin', [ViewController::class, 'admin']);
-    return $twig->render($response, 'admin.html.twig', [
-        'name' => 'John',
-    ]);
-});
 
 return $app;