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- <?php
- /**
- * GNU social - a federating social network
- *
- * ActivityPubPlugin implementation for GNU Social
- *
- * LICENCE: This program 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.
- *
- * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * @category Plugin
- * @package GNUsocial
- * @author Diogo Cordeiro <diogo@fc.up.pt>
- * @author Daniel Supernault <danielsupernault@gmail.com>
- * @copyright 2018 Free Software Foundation http://fsf.org
- * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link https://www.gnu.org/software/social/
- */
- if (!defined ('GNUSOCIAL')) {
- exit (1);
- }
- // Validate Object
- if (!is_string ($data->object)) {
- ActivityPubReturn::error ("Invalid Object object, URL expected.");
- }
- // Get valid Object profile
- try {
- $object_profile = new Activitypub_explorer;
- $object_profile = $object_profile->lookup ($data->object)[0];
- } catch(Exception $e) {
- ActivityPubReturn::error ("Invalid Object Actor URL.", 404);
- }
- try {
- if (!Subscription::exists ($actor_profile, $object_profile)) {
- Subscription::start ($actor_profile, $object_profile);
- $res = array ("@context" => "https://www.w3.org/ns/activitystreams",
- "type" => "Follow",
- "actor" => $data->actor,
- "object" => $data->object);
- ActivityPubReturn::answer ($res);
- } else {
- ActivityPubReturn::error ("Already following.", 409);
- }
- } catch (Exception $e) {
- ActivityPubReturn::error ("Invalid Object Actor URL.", 404);
- }
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