[ActivityStreamsTwo] Introduce a structure for data representation in ActivityStreams 2.0

Type factory borrowed from landrok/activitypub

plugins/ActivityPub/Controller/Inbox.php

@@ -0,0 +1,71 @@
+<?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/>.
+
+// }}}
+
+namespace Plugin\ActivityPub\Controller;
+
+use App\Core\Controller;
+use App\Core\DB\DB;
+use function App\Core\I18n\_m;
+use App\Util\Exception\ClientException;
+use Plugin\ActivityPub\ActivityPub;
+use Plugin\ActivityStreamsTwo\Util\Model\AS2ToEntity\AS2ToEntity;
+use Plugin\ActivityStreamsTwo\Util\Response\TypeResponse;
+use Plugin\ActivityStreamsTwo\Util\Type;
+use Plugin\ActivityStreamsTwo\Util\Type\Util;
+
+class Inbox extends Controller
+{
+    /**
+     * Inbox handler
+     */
+    public function handle(int $gsactor_id)
+    {
+        $user = DB::find('local_user', ['id' => $gsactor_id]);
+        if (is_null($user)) {
+            throw new ClientException(_m('No such actor.'), 404);
+        }
+
+        // Check accept header
+        ActivityPub::validateAcceptHeader(
+            $this->request->headers->get('accept'),
+            true
+        );
+
+        // Check current actor can post
+
+        // Get content
+        $payload = Util::decodeJson(
+            (string) $this->request->getContent()
+        );
+
+        // Cast as an ActivityStreams type
+        $type = Type::create($payload);
+
+        dd(AS2ToEntity::translate($type->toArray()['object']));
+
+        // $http_signature = new HttpSignature($this->server);
+        // if ($http_signature->verify($request)) {
+        //     return new Response('', 201);
+        // }
+
+        return new TypeResponse($type, status: 202);
+    }
+}