<?php // 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 * @author Diogo Cordeiro <diogo@fc.up.pt> * @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org * @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later * @link http://www.gnu.org/software/social/ */ defined('GNUSOCIAL') || die(); /** * ActivityPub error representation * * @category Plugin * @package GNUsocial * @author Diogo Cordeiro <diogo@fc.up.pt> * @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later */ class Activitypub_undo { /** * Generates an ActivityPub representation of a Undo * * @author Diogo Cordeiro <diogo@fc.up.pt> * @param array $object * @return array pretty array to be used in a response */ public static function undo_to_array($object) { $res = [ '@context' => 'https://www.w3.org/ns/activitystreams', 'id' => $object['id'].'/undo', 'type' => 'Undo', 'actor' => $object['actor'], 'object' => $object ]; return $res; } /** * Verifies if a given object is acceptable for a Undo Activity. * * @param array $object * @return bool * @throws Exception * @author Diogo Cordeiro <diogo@fc.up.pt> */ public static function validate_object($object) { if (!is_array($object)) { throw new Exception('Invalid Object Format for Undo Activity.'); } if (!isset($object['type'])) { throw new Exception('Object type was not specified for Undo Activity.'); } switch ($object['type']) { case 'Follow': case 'Like': // Validate data if (!filter_var($object['object'], FILTER_VALIDATE_URL)) { throw new Exception('Object is not a valid Object URI for Activity.'); } break; default: throw new Exception('This is not a supported Object Type for Undo Activity.'); } return true; } }