123 lines
4.3 KiB
PHP
123 lines
4.3 KiB
PHP
<?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
|
|
*
|
|
* @see 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_create
|
|
{
|
|
/**
|
|
* Generates an ActivityPub representation of a Create
|
|
*
|
|
* @param string $actor
|
|
* @param array $object
|
|
* @param bool $directMessage whether it is a private Create activity or not
|
|
*
|
|
* @return array pretty array to be used in a response
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
public static function create_to_array(string $actor, string $uri, $object, bool $directMessage = false): array
|
|
{
|
|
$res = [
|
|
'@context' => 'https://www.w3.org/ns/activitystreams',
|
|
'id' => $object['id'] . '/create',
|
|
'type' => 'Create',
|
|
'directMessage' => $directMessage,
|
|
'to' => $object['to'],
|
|
'cc' => $object['cc'],
|
|
'actor' => $actor,
|
|
'object' => $object,
|
|
];
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* Verifies if a given object is acceptable for a Create Activity.
|
|
*
|
|
* @param array $object
|
|
*
|
|
* @throws Exception if invalid
|
|
*
|
|
* @return bool True if acceptable, false if valid but unsupported
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
public static function validate_object($object): bool
|
|
{
|
|
if (!is_array($object)) {
|
|
common_debug('ActivityPub Create Validator: Rejected because of invalid Object format.');
|
|
throw new Exception('Invalid Object Format for Create Activity.');
|
|
}
|
|
if (!isset($object['type'])) {
|
|
common_debug('ActivityPub Create Validator: Rejected because of Type.');
|
|
throw new Exception('Object type was not specified for Create Activity.');
|
|
}
|
|
if (isset($object['directMessage']) && !is_bool($object['directMessage'])) {
|
|
common_debug('ActivityPub Create Validator: Rejected because Object directMessage is invalid.');
|
|
throw new Exception('Invalid Object directMessage.');
|
|
}
|
|
switch ($object['type']) {
|
|
case 'Note':
|
|
// Validate data
|
|
return Activitypub_notice::validate_note($object);
|
|
break;
|
|
default:
|
|
throw new Exception('This is not a supported Object Type for Create Activity.');
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Verify if received note is private (direct).
|
|
* Note that we're conformant with the (yet) non-standard directMessage attribute:
|
|
* https://github.com/w3c/activitypub/issues/196#issuecomment-304958984
|
|
*
|
|
* @param array $activity received Create-Note activity
|
|
*
|
|
* @return bool true if note is private, false otherwise
|
|
*
|
|
* @author Bruno casteleiro <brunoccast@fc.up.pt>
|
|
*/
|
|
public static function isPrivateNote(array $activity): bool
|
|
{
|
|
if (isset($activity['directMessage'])) {
|
|
return $activity['directMessage'];
|
|
}
|
|
|
|
return empty($activity['cc']) && !in_array('https://www.w3.org/ns/activitystreams#Public', $activity['to']);
|
|
}
|
|
}
|