185 lines
7.5 KiB
PHP
185 lines
7.5 KiB
PHP
<?php
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declare(strict_types=1);
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// {{{ License
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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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/**
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* ActivityPub implementation for GNU social
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*
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* @package GNUsocial
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* @category ActivityPub
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* @author Diogo Peralta Cordeiro <@diogo.site>
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* @copyright 2021 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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*/
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namespace Plugin\ActivityPub\Util\Model;
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use ActivityPhp\Type;
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use ActivityPhp\Type\AbstractObject;
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use App\Core\DB\DB;
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use App\Core\Event;
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use App\Core\Router\Router;
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use App\Entity\Activity as GSActivity;
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use App\Util\Exception\ClientException;
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use App\Util\Exception\NoSuchActorException;
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use DateTime;
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use DateTimeInterface;
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use Exception;
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use InvalidArgumentException;
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use Plugin\ActivityPub\ActivityPub;
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use Plugin\ActivityPub\Entity\ActivitypubActivity;
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use Plugin\ActivityPub\Util\Model;
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use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
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/**
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* This class handles translation between JSON and ActivityPub Activities
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*
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* @copyright 2021 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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*/
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class Activity extends Model
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{
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/**
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* Create an Entity from an ActivityStreams 2.0 JSON string
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* This will persist new GSActivities, GSObjects, and APActivity
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*
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* @param string|AbstractObject $json
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* @param array $options
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* @return ActivitypubActivity
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* @throws NoSuchActorException
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* @throws ClientExceptionInterface
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* @throws RedirectionExceptionInterface
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* @throws ServerExceptionInterface
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* @throws TransportExceptionInterface
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*/
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public static function fromJson(string|AbstractObject $json, array $options = []): ActivitypubActivity
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{
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$type_activity = is_string($json) ? self::jsonToType($json) : $json;
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// Ditch known activities
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$ap_act = ActivitypubActivity::getByPK(['activity_uri' => $type_activity->get('id')]);
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if (!is_null($ap_act)) {
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return $ap_act;
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}
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// Find Actor and Object
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$actor = ActivityPub::getActorByUri($type_activity->get('actor'));
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$type_object = $type_activity->get('object');
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if (is_string($type_object)) { // Retrieve it
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$type_object = ActivityPub::getObjectByUri($type_object, try_online: true);
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} else { // Encapsulated, if we have it locally, prefer it
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$type_object = ActivityPub::getObjectByUri($type_object->get('id'), try_online: false) ?? $type_object;
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}
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if (($type_object instanceof Type\AbstractObject)) { // It's a new object apparently
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if (Event::handle('NewActivityPubActivity', [$actor, $type_activity, $type_object, &$ap_act]) !== Event::stop) {
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return self::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
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}
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} else { // Object was already stored locally then
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if (Event::handle('NewActivityPubActivityWithObject', [$actor, $type_activity, $type_object, &$ap_act]) !== Event::stop) {
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return self::handle_core_activity($actor, $type_activity, $type_object, $ap_act);
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}
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}
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return $ap_act;
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}
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private static function handle_core_activity(\App\Entity\Actor $actor, AbstractObject $type_activity, mixed $type_object, ?ActivitypubActivity &$ap_act): ActivitypubActivity
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{
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if ($type_activity->get('type') === 'Create' && $type_object->get('type') === 'Note') {
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if ($type_object instanceof AbstractObject) {
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$note = Note::fromJson($type_object, ['test_authority' => true, 'actor_uri' => $type_activity->get('actor'), 'actor' => $actor, 'actor_id' => $actor->getId()]);
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} else {
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if ($type_object instanceof \App\Entity\Note) {
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$note = $type_object;
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} else {
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throw new Exception('dunno bro');
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}
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}
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// Store Activity
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$act = GSActivity::create([
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'actor_id' => $actor->getId(),
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'verb' => 'create',
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'object_type' => 'note',
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'object_id' => $note->getId(),
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'created' => new DateTime($type_activity->get('published') ?? 'now'),
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'source' => 'ActivityPub',
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]);
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DB::persist($act);
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// Store ActivityPub Activity
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$ap_act = ActivitypubActivity::create([
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'activity_id' => $act->getId(),
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'activity_uri' => $type_activity->get('id'),
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'created' => new DateTime($type_activity->get('published') ?? 'now'),
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'modified' => new DateTime(),
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]);
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DB::persist($ap_act);
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}
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return $ap_act;
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}
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/**
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* Get a JSON
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*
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* @param mixed $object
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* @param int|null $options
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* @return string
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* @throws ClientException
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*/
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public static function toJson(mixed $object, ?int $options = null): string
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{
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if ($object::class !== 'App\Entity\Activity') {
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throw new InvalidArgumentException('First argument type is Activity');
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}
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$gs_verb_to_activity_stream_two_verb = null;
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if (Event::handle('GSVerbToActivityStreamsTwoActivityType', [($verb = $object->getVerb()), &$gs_verb_to_activity_stream_two_verb]) === Event::next) {
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$gs_verb_to_activity_stream_two_verb = match ($verb) {
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'create' => 'Create',
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'undo' => 'Undo',
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default => throw new ClientException('Invalid verb'),
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};
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}
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$attr = [
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'type' => $gs_verb_to_activity_stream_two_verb,
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'id' => Router::url('activity_view', ['id' => $object->getId()], Router::ABSOLUTE_URL),
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'published' => $object->getCreated()->format(DateTimeInterface::RFC3339),
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'actor' => $object->getActor()->getUri(Router::ABSOLUTE_URL),
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'to' => ['https://www.w3.org/ns/activitystreams#Public'], // TODO: implement proper scope address
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'cc' => ['https://www.w3.org/ns/activitystreams#Public'],
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];
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$attr['object'] = ($attr['type'] === 'Create') ? self::jsonToType(Model::toJson($object->getObject())) : ActivityPub::getUriByObject($object->getObject());
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if (!is_string($attr['object'])) {
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$attr['to'] = array_unique(array_merge($attr['to'], $attr['object']->get('to')));
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$attr['cc'] = array_unique(array_merge($attr['cc'], $attr['object']->get('cc')));
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}
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$type = self::jsonToType($attr);
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Event::handle('ActivityPubAddActivityStreamsTwoData', [$type->get('type'), &$type]);
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return $type->toJson($options);
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}
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}
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