Разделение по отдельным репозиториям

app/Controllers/BasicController.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controllers;
+
+use App\Core\Playlist;
+use App\Errors\PlaylistNotFoundException;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Slim\Views\Twig;
+use Twig\Error\LoaderError;
+use Twig\Error\RuntimeError;
+use Twig\Error\SyntaxError;
+
+/**
+ *
+ */
+class BasicController
+{
+    /**
+     * Отправляет сообщение о том, что метод не найден с кодом страницы 404
+     *
+     * @param ServerRequestInterface $request
+     * @param ResponseInterface $response
+     * @return ResponseInterface
+     * @throws LoaderError
+     * @throws RuntimeError
+     * @throws SyntaxError
+     */
+    public function notFound(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $response->withStatus(404);
+        $this->view($request, $response, 'notfound.twig');
+
+        return $response;
+    }
+
+    /**
+     * @param ServerRequestInterface $request
+     * @param ResponseInterface $response
+     * @param string $template
+     * @param array $data
+     * @return ResponseInterface
+     * @throws LoaderError
+     * @throws RuntimeError
+     * @throws SyntaxError
+     */
+    protected function view(
+        ServerRequestInterface $request,
+        ResponseInterface $response,
+        string $template,
+        array $data = [],
+    ): ResponseInterface {
+        $view = Twig::fromRequest($request);
+        return $view->render($response, $template, $data);
+    }
+}