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https://github.com/friendica/friendica
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Hypolite Petovan
da32fa8fa6
- These classes are used to flatten the recursive missing activity fetch that can hit PHP's maximum function nesting limit - The original caller is responsible for processing the remaining queue once the original activity has been fetched
58 lines
1.9 KiB
PHP
58 lines
1.9 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program 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
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Protocol\ActivityPub;
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/**
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* This class prevents maximum function nesting errors by flattening recursive calls to Processor::fetchMissingActivity
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*/
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class FetchQueue
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{
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/** @var FetchQueueItem[] */
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protected $queue = [];
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public function push(FetchQueueItem $item)
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{
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array_push($this->queue, $item);
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}
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/**
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* Processes missing activities one by one. It is possible that a processing call will add additional missing
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* activities, they will be processed in subsequent iterations of the loop.
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*
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* Since this process is self-contained, it isn't suitable to retrieve the URI of a single activity.
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*
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* The simplest way to get the URI of the first activity and ensures all the parents are fetched is this way:
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*
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* $fetchQueue = new ActivityPub\FetchQueue();
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* $fetchedUri = ActivityPub\Processor::fetchMissingActivity($fetchQueue, $activityUri);
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* $fetchQueue->process();
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*/
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public function process()
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{
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while (count($this->queue)) {
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$fetchQueueItem = array_pop($this->queue);
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call_user_func_array([Processor::class, 'fetchMissingActivity'], array_merge([$this], $fetchQueueItem->toParameters()));
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}
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}
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}
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