[CONTROLLER] Add Controller base class, which handles rendering templates if requested HTML or json, accordingly

src/Core/Controller.php

@@ -0,0 +1,67 @@
+<?php
+
+// {{{ License
+
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+
+// }}}
+
+/**
+ * Base class for controllers
+ *
+ * @package  GNUsocial
+ * @category Controller
+ *
+ * @author    Hugo Sales <hugo@fc.up.pt>
+ * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace App\Core;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+
+class Controller extends AbstractController
+{
+    public function __invoke(Request $request)
+    {
+        $class  = get_called_class();
+        $method = 'on' . ucfirst(strtolower($request->getMethod()));
+        $vars   = ['request' => $request];
+        Event::handle('StartTwigPopulateVars', [&$vars]);
+        if (method_exists($class, $method)) {
+            $vars = array_merge_recursive($vars, $class::$method($request, $vars));
+        } else {
+            $vars = array_merge_recursive($vars, $class::handle($request, $vars));
+        }
+        Event::handle('EndTwigPopulateVars', [&$vars]);
+        $template = $vars['_template'];
+        unset($vars['_template'], $vars['request']);
+
+        // Respond in the the most preffered acceptable content type
+        $format = $request->getFormat($request->getAcceptableContentTypes()[0]);
+        switch ($format) {
+        case 'html':
+            return $this->render($template, $vars);
+        case 'json':
+            return new JsonResponse($vars);
+        default:
+            throw new BadRequestHttpException('Unsupported format', null, 406);
+        }
+    }
+}