gnu-social/plugins/FeedPoller/lib/feedpoll.php

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2015-01-14 09:16:28 +09:00
<?php
/**
* Store last poll time in db, then check if they should be renewed (if so, enqueue).
* Can be called from a queue handler on a per-feed status to poll stuff.
*
* Used as internal feed polling mechanism (atom/rss)
*
* @category OStatus
* @package GNUsocial
* @author Mikael Nordfeldth <mmn@hethane.se>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://www.gnu.org/software/social/
*/
if (!defined('GNUSOCIAL')) { exit(1); }
class FeedPoll {
const DEFAULT_INTERVAL = 5; // in minutes
const QUEUE_CHECK = 'feedpoll-check';
// TODO: Find some smart way to add feeds only once, so they don't get more than 1 feedpoll in the queue each
// probably through sub_start sub_end trickery.
public static function enqueueNewFeeds(array $args=array()) {
if (!isset($args['interval']) || !is_int($args['interval']) || $args['interval']<=0) {
$args['interval'] = self::DEFAULT_INTERVAL;
}
$args['interval'] *= 60; // minutes to seconds
$feedsub = new FeedSub();
$feedsub->sub_state = 'nohub';
// Find feeds that haven't been polled within the desired interval,
// though perhaps we're abusing the "last_update" field here?
$feedsub->whereAdd(sprintf('last_update < "%s"', common_sql_date(time()-$args['interval'])));
$feedsub->find();
$qm = QueueManager::get();
while ($feedsub->fetch()) {
$orig = clone($feedsub);
$item = array('id' => $feedsub->id);
$qm->enqueue($item, self::QUEUE_CHECK);
$feedsub->last_update = common_sql_now();
$feedsub->update($orig);
}
}
public function setupFeedSub(FeedSub $feedsub, $interval=300)
{
$orig = clone($feedsub);
$feedsub->sub_state = 'nohub';
$feedsub->sub_start = common_sql_date(time());
$feedsub->sub_end = '';
$feedsub->last_update = common_sql_date(time()-$interval); // force polling as soon as we can
$feedsub->update($orig);
}
public function checkUpdates(FeedSub $feedsub)
{
$request = new HTTPClient();
$feed = $request->get($feedsub->uri);
if (!$feed->isOk()) {
throw new ServerException('FeedSub could not fetch id='.$feedsub->id.' (Error '.$feed->getStatus().': '.$feed->getBody());
}
$feedsub->receive($feed->getBody(), null);
}
}