[PLUGIN][ActivityPub] Provide ActivityStreams 2.0 responses for every Collection

Implemented ActivityPub Outbox

plugins/ActivityPub/Controller/Outbox.php

@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types = 1);
+
+// {{{ 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/>.
+// }}}
+
+/**
+ * ActivityPub implementation for GNU social
+ *
+ * @package   GNUsocial
+ * @category  ActivityPub
+ *
+ * @author    Diogo Peralta Cordeiro <@diogo.site>
+ * @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace Plugin\ActivityPub\Controller;
+
+use App\Core\DB\DB;
+use function App\Core\I18n\_m;
+use App\Core\Log;
+use App\Core\Router\Router;
+use App\Entity\Activity;
+use App\Util\Exception\ClientException;
+use Exception;
+use Plugin\ActivityPub\Util\OrderedCollectionController;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * ActivityPub Outbox Handler
+ *
+ * @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+class Outbox extends OrderedCollectionController
+{
+    /**
+     * Create an Inbox Handler to receive something from someone.
+     */
+    public function viewOutboxByActorId(Request $request, int $gsactor_id): array
+    {
+        try {
+            $user = DB::findOneBy('local_user', ['id' => $gsactor_id]);
+        } catch (Exception $e) {
+            throw new ClientException(_m('No such actor.'), 404, $e);
+        }
+
+        $this->actor_id = $gsactor_id;
+
+        Log::debug('ActivityPub Outbox: Received a GET request.');
+
+        $activities = DB::findBy(Activity::class, ['actor_id' => $user->getId()], order_by: ['created' => 'DESC']);
+
+        foreach ($activities as $act) {
+            $this->ordered_items[] = Router::url('activity_view', ['id' => $act->getId()], ROUTER::ABSOLUTE_URL);
+        }
+
+        $this->route      = 'activitypub_actor_outbox';
+        $this->route_args = ['gsactor_id' => $user->getId(), 'page' => $this->int('page') ?? 0];
+
+        return $this->handle($request);
+    }
+}