3 * @copyright Copyright (C) 2010-2022, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
25 * This class prevents maximum function nesting errors by flattening recursive calls to Processor::fetchMissingActivity
29 /** @var FetchQueueItem[] */
30 protected $queue = [];
32 public function push(FetchQueueItem $item)
34 array_push($this->queue, $item);
38 * Processes missing activities one by one. It is possible that a processing call will add additional missing
39 * activities, they will be processed in subsequent iterations of the loop.
41 * Since this process is self-contained, it isn't suitable to retrieve the URI of a single activity.
43 * The simplest way to get the URI of the first activity and ensures all the parents are fetched is this way:
45 * $fetchQueue = new ActivityPub\FetchQueue();
46 * $fetchedUri = ActivityPub\Processor::fetchMissingActivity($fetchQueue, $activityUri);
47 * $fetchQueue->process();
49 public function process()
51 while (count($this->queue)) {
52 $fetchQueueItem = array_pop($this->queue);
54 call_user_func_array([Processor::class, 'fetchMissingActivity'], array_merge([$this], $fetchQueueItem->toParameters()));