205 lines
8.6 KiB
PHP
205 lines
8.6 KiB
PHP
<?php
|
|
|
|
declare(strict_types = 1);
|
|
|
|
// {{{ 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/>.
|
|
// }}}
|
|
|
|
/**
|
|
* ActivityPub implementation for GNU social
|
|
*
|
|
* @package GNUsocial
|
|
* @category ActivityPub
|
|
*
|
|
* @author Diogo Peralta Cordeiro <@diogo.site>
|
|
* @copyright 2021 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
|
|
namespace Plugin\ActivityPub\Util\Model;
|
|
|
|
use ActivityPhp\Type;
|
|
use ActivityPhp\Type\AbstractObject;
|
|
use App\Core\DB\DB;
|
|
use App\Core\Event;
|
|
use App\Core\Router\Router;
|
|
use App\Entity\Activity as GSActivity;
|
|
use App\Util\Exception\ClientException;
|
|
use App\Util\Exception\NoSuchActorException;
|
|
use App\Util\Exception\NotFoundException;
|
|
use App\Util\Exception\NotImplementedException;
|
|
use DateTimeInterface;
|
|
use InvalidArgumentException;
|
|
use Plugin\ActivityPub\ActivityPub;
|
|
use Plugin\ActivityPub\Entity\ActivitypubActivity;
|
|
use Plugin\ActivityPub\Util\Explorer;
|
|
use Plugin\ActivityPub\Util\Model;
|
|
use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
|
|
|
|
/**
|
|
* This class handles translation between JSON and ActivityPub Activities
|
|
*
|
|
* @copyright 2021 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
class Activity extends Model
|
|
{
|
|
/**
|
|
* Create an Entity from an ActivityStreams 2.0 JSON string
|
|
* This will persist new GSActivities, GSObjects, and APActivity
|
|
*
|
|
* @throws ClientExceptionInterface
|
|
* @throws NoSuchActorException
|
|
* @throws NotImplementedException
|
|
* @throws RedirectionExceptionInterface
|
|
* @throws ServerExceptionInterface
|
|
* @throws TransportExceptionInterface
|
|
*/
|
|
public static function fromJson(string|AbstractObject $json, array $options = []): ActivitypubActivity
|
|
{
|
|
$type_activity = \is_string($json) ? self::jsonToType($json) : $json;
|
|
|
|
// Ditch known activities
|
|
if ($type_activity->has('id')) { // We can't dereference a transient activity
|
|
$ap_act = DB::findOneBy(ActivitypubActivity::class, ['activity_uri' => $type_activity->get('id')], return_null: true);
|
|
if (!\is_null($ap_act)) {
|
|
return $ap_act;
|
|
}
|
|
}
|
|
|
|
// Find Actor and Object
|
|
$actor = Explorer::getOneFromUri($type_activity->get('actor'));
|
|
$type_object = $type_activity->get('object');
|
|
if (\is_string($type_object)) { // Retrieve it
|
|
$type_object = ActivityPub::getObjectByUri($type_object, try_online: true);
|
|
} else { // Encapsulated, if we have it locally, prefer it
|
|
// TODO: Test authority of activity over object
|
|
$type_object = ActivityPub::getObjectByUri($type_object->get('id'), try_online: false) ?? $type_object;
|
|
}
|
|
|
|
if (($type_object instanceof Type\AbstractObject)) { // It's a new object apparently
|
|
if (Event::handle('NewActivityPubActivity', [$actor, $type_activity, $type_object, &$ap_act]) !== Event::stop) {
|
|
return self::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
|
|
}
|
|
} else { // Object was already stored locally then
|
|
if (Event::handle('NewActivityPubActivityWithObject', [$actor, $type_activity, $type_object, &$ap_act]) !== Event::stop) {
|
|
return self::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
|
|
}
|
|
}
|
|
|
|
return $ap_act;
|
|
}
|
|
|
|
private static function handle_core_activity(\App\Entity\Actor $actor, AbstractObject $type_activity, mixed $type_object, ?ActivitypubActivity &$ap_act): ActivitypubActivity
|
|
{
|
|
switch ($type_activity->get('type')) {
|
|
case 'Create':
|
|
ActivityCreate::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
|
|
break;
|
|
case 'Follow':
|
|
ActivityFollow::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
|
|
break;
|
|
case 'Undo':
|
|
$object_type = $type_object instanceof AbstractObject ? match ($type_object->get('type')) {
|
|
'Note' => \App\Entity\Note::class,
|
|
// no break
|
|
default => throw new NotImplementedException('Unsupported Undo of Object Activity.'),
|
|
} : $type_object::class;
|
|
|
|
switch ($object_type) {
|
|
case GSActivity::class:
|
|
switch ($type_object->getVerb()) {
|
|
case 'subscribe':
|
|
ActivityFollow::handle_undo($actor, $type_activity, $type_object, $ap_act);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case 'Announce':
|
|
ActivityAnnounce::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
|
|
break;
|
|
}
|
|
return $ap_act;
|
|
}
|
|
|
|
/**
|
|
* Get a JSON
|
|
*
|
|
* @throws ClientException
|
|
*/
|
|
public static function toJson(mixed $object, int $options = \JSON_UNESCAPED_SLASHES): string
|
|
{
|
|
if ($object::class !== GSActivity::class) {
|
|
throw new InvalidArgumentException('First argument type must be an Activity.');
|
|
}
|
|
|
|
$gs_verb_to_activity_streams_two_verb = null;
|
|
if (Event::handle('GSVerbToActivityStreamsTwoActivityType', [($verb = $object->getVerb()), &$gs_verb_to_activity_streams_two_verb]) === Event::next) {
|
|
$gs_verb_to_activity_streams_two_verb = match ($verb) {
|
|
'undo' => 'Undo',
|
|
'create' => 'Create',
|
|
'subscribe' => 'Follow',
|
|
default => throw new ClientException('Invalid verb'),
|
|
};
|
|
}
|
|
|
|
$attr = [
|
|
'type' => $gs_verb_to_activity_streams_two_verb,
|
|
'@context' => ActivityPub::$activity_streams_two_context,
|
|
'id' => Router::url('activity_view', ['id' => $object->getId()], Router::ABSOLUTE_URL),
|
|
'published' => $object->getCreated()->format(DateTimeInterface::RFC3339),
|
|
'actor' => $object->getActor()->getUri(Router::ABSOLUTE_URL),
|
|
];
|
|
|
|
// Get object or Tombstone
|
|
try {
|
|
$object = $object->getObject(); // Throws NotFoundException
|
|
$attr['object'] = ($attr['type'] === 'Create') ? self::jsonToType(Model::toJson($object)) : ActivityPub::getUriByObject($object);
|
|
} catch (NotFoundException) {
|
|
// It seems this object was deleted, refer to it as a Tombstone
|
|
$uri = match ($object->getObjectType()) {
|
|
'note' => Router::url('note_view', ['id' => $object->getObjectId()], type: Router::ABSOLUTE_URL),
|
|
'actor' => Router::url('actor_view_id', ['id' => $object->getObjectId()], type: Router::ABSOLUTE_URL),
|
|
default => throw new NotImplementedException(),
|
|
};
|
|
$attr['object'] = Type::create('Tombstone', [
|
|
'id' => $uri,
|
|
]);
|
|
}
|
|
|
|
// If embedded non tombstone Object
|
|
if (!\is_string($attr['object']) && $attr['object']->get('type') !== 'Tombstone') {
|
|
// Little special case
|
|
if ($attr['type'] === 'Create' && ($attr['object']->get('type') === 'Note' || $attr['object']->get('type') === 'Page')) {
|
|
$attr['to'] = $attr['object']->get('to') ?? [];
|
|
$attr['cc'] = $attr['object']->get('cc') ?? [];
|
|
}
|
|
}
|
|
|
|
if (!\is_string($attr['object'])) {
|
|
$attr['object']->set('@context', null);
|
|
}
|
|
$type = self::jsonToType($attr);
|
|
Event::handle('ActivityPubAddActivityStreamsTwoData', [$type->get('type'), &$type]);
|
|
return $type->toJson($options);
|
|
}
|
|
}
|