88 lines
2.8 KiB
PHP
88 lines
2.8 KiB
PHP
<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
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* ActivityPub implementation for GNU social
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*
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* @package GNUsocial
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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* @link http://www.gnu.org/software/social/
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*/
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defined('GNUSOCIAL') || die();
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/**
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* ActivityPub error representation
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*
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* @category Plugin
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* @package GNUsocial
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class Activitypub_undo
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{
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/**
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* Generates an ActivityPub representation of a Undo
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @param array $object
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* @return array pretty array to be used in a response
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*/
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public static function undo_to_array(array $object): array
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{
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$res = [
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'id' => $object['id'] . '#undo',
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'type' => 'Undo',
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'actor' => $object['actor'],
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'object' => $object
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];
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return $res;
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}
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/**
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* Verifies if a given object is acceptable for a Undo Activity.
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*
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* @param array $object
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* @return bool
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* @throws Exception
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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*/
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public static function validate_object(array $object): bool
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{
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if (!is_array($object)) {
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throw new Exception('Invalid Object Format for Undo Activity.');
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}
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if (!isset($object['type'])) {
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throw new Exception('Object type was not specified for Undo Activity.');
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}
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switch ($object['type']) {
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case 'Follow':
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case 'Like':
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// Validate data
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if (!filter_var($object['object'], FILTER_VALIDATE_URL)) {
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throw new Exception('Object is not a valid Object URI for Activity.');
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}
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break;
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default:
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throw new Exception('This is not a supported Object Type for Undo Activity.');
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}
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return true;
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}
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}
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