183 lines
6.4 KiB
PHP
183 lines
6.4 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\Model;
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use Friendica\Core\Logger;
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use Friendica\Core\Worker;
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use Friendica\Database\DBA;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Network;
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class PushSubscriber
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{
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/**
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* Send subscription notifications for the given user
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*
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* @param integer $uid User ID
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* @param int $default_priority
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function publishFeed($uid, $default_priority = PRIORITY_HIGH)
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{
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$condition = ['push' => 0, 'uid' => $uid];
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DBA::update('push_subscriber', ['push' => 1, 'next_try' => DBA::NULL_DATETIME], $condition);
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self::requeue($default_priority);
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}
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/**
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* start workers to transmit the feed data
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*
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* @param int $default_priority
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function requeue($default_priority = PRIORITY_HIGH)
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{
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// We'll push to each subscriber that has push > 0,
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// i.e. there has been an update (set in notifier.php).
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$subscribers = DBA::select('push_subscriber', ['id', 'push', 'callback_url', 'nickname'], ["`push` > 0 AND `next_try` < ?", DateTimeFormat::utcNow()]);
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while ($subscriber = DBA::fetch($subscribers)) {
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// We always handle retries with low priority
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if ($subscriber['push'] > 1) {
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$priority = PRIORITY_LOW;
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} else {
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$priority = $default_priority;
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}
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Logger::info('Publish feed to ' . $subscriber['callback_url'] . ' for ' . $subscriber['nickname'] . ' with priority ' . $priority);
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Worker::add($priority, 'PubSubPublish', (int)$subscriber['id']);
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}
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DBA::close($subscribers);
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}
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/**
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* Renew the feed subscription
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*
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* @param integer $uid User ID
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* @param string $nick Priority for push workers
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* @param integer $subscribe Subscribe (Unsubscribe = false)
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* @param string $hub_callback Callback address
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* @param string $hub_topic Feed topic
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* @param string $hub_secret Subscription secret
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* @throws \Exception
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*/
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public static function renew($uid, $nick, $subscribe, $hub_callback, $hub_topic, $hub_secret)
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{
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// fetch the old subscription if it exists
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$subscriber = DBA::selectFirst('push_subscriber', ['last_update', 'push'], ['callback_url' => $hub_callback]);
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// delete old subscription if it exists
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DBA::delete('push_subscriber', ['callback_url' => $hub_callback]);
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if ($subscribe) {
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// if we are just updating an old subscription, keep the
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// old values for last_update but reset the push
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if (DBA::isResult($subscriber)) {
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$last_update = $subscriber['last_update'];
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$push_flag = min($subscriber['push'], 1);
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} else {
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$last_update = DateTimeFormat::utcNow();
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$push_flag = 0;
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}
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// subscribe means adding the row to the table
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$fields = ['uid' => $uid, 'callback_url' => $hub_callback,
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'topic' => $hub_topic, 'nickname' => $nick, 'push' => $push_flag,
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'last_update' => $last_update, 'renewed' => DateTimeFormat::utcNow(),
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'secret' => $hub_secret];
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DBA::insert('push_subscriber', $fields);
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Logger::notice("Successfully subscribed [$hub_callback] for $nick");
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} else {
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Logger::notice("Successfully unsubscribed [$hub_callback] for $nick");
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// we do nothing here, since the row was already deleted
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}
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}
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/**
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* Delay the push subscriber
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*
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* @param integer $id Subscriber ID
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* @throws \Exception
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*/
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public static function delay($id)
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{
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$subscriber = DBA::selectFirst('push_subscriber', ['push', 'callback_url', 'renewed', 'nickname'], ['id' => $id]);
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if (!DBA::isResult($subscriber)) {
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return;
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}
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$retrial = $subscriber['push'];
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if ($retrial > 14) {
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// End subscriptions if they weren't renewed for more than two months
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$days = round((time() - strtotime($subscriber['renewed'])) / (60 * 60 * 24));
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if ($days > 60) {
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DBA::update('push_subscriber', ['push' => -1, 'next_try' => DBA::NULL_DATETIME], ['id' => $id]);
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Logger::info('Delivery error: Subscription ' . $subscriber['callback_url'] . ' for ' . $subscriber['nickname'] . ' is marked as ended.');
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} else {
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DBA::update('push_subscriber', ['push' => 0, 'next_try' => DBA::NULL_DATETIME], ['id' => $id]);
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Logger::info('Delivery error: Giving up ' . $subscriber['callback_url'] . ' for ' . $subscriber['nickname'] . ' for now.');
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}
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} else {
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// Calculate the delay until the next trial
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$delay = (($retrial + 3) ** 4) + (rand(1, 30) * ($retrial + 1));
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$next = DateTimeFormat::utc('now + ' . $delay . ' seconds');
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$retrial = $retrial + 1;
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DBA::update('push_subscriber', ['push' => $retrial, 'next_try' => $next], ['id' => $id]);
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Logger::info('Delivery error: Next try (' . $retrial . ') ' . $subscriber['callback_url'] . ' for ' . $subscriber['nickname'] . ' at ' . $next);
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}
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}
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/**
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* Reset the push subscriber
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*
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* @param integer $id Subscriber ID
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* @param string $last_update Date of last transmitted item
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* @throws \Exception
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*/
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public static function reset($id, $last_update)
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{
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$subscriber = DBA::selectFirst('push_subscriber', ['callback_url', 'nickname'], ['id' => $id]);
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if (!DBA::isResult($subscriber)) {
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return;
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}
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// set last_update to the 'created' date of the last item, and reset push=0
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$fields = ['push' => 0, 'next_try' => DBA::NULL_DATETIME, 'last_update' => $last_update];
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DBA::update('push_subscriber', $fields, ['id' => $id]);
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Logger::info('Subscriber ' . $subscriber['callback_url'] . ' for ' . $subscriber['nickname'] . ' is marked as vital');
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$parts = parse_url($subscriber['callback_url']);
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unset($parts['path']);
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$server_url = Network::unparseURL($parts);
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$gsid = GServer::getID($server_url, true);
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if (!empty($gsid)) {
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GServer::setProtocol($gsid, Post\DeliveryData::OSTATUS);
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}
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}
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}
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