gnu-social/plugins/Cronish/lib/cronish.php

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<?php
/**
* GNU social cron-on-visit class
*
* Keeps track, through Config dataobject class, of relative time since the
* last run in order to to run event handlers with certain intervals.
*
* @category Cron
* @package GNUsocial
* @author Mikael Nordfeldth <mmn@hethane.se>
* @copyright 2013 Free Software Foundation, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class Cronish
{
/**
* Will call events as close as it gets to one hour. Event handlers
* which use this MUST be as quick as possible, maybe only adding a
* queue item to be handled later or something. Otherwise execution
* will timeout for PHP - or at least cause unnecessary delays for
* the unlucky user who visits the site exactly at one of these events.
*/
public function callTimedEvents()
{
$timers = array('minutely' => 60, // this is NOT guaranteed to run every minute (only on busy sites)
'hourly' => 3600,
'daily' => 86400,
'weekly' => 604800);
foreach($timers as $name=>$interval) {
$run = false;
$lastrun = new Config();
$lastrun->section = 'cron';
$lastrun->setting = 'last_' . $name;
$found = $lastrun->find(true);
if (!$found) {
$lastrun->value = time();
if ($lastrun->insert() === false) {
common_log(LOG_WARNING, "Could not save 'cron' setting '{$name}'");
continue;
}
$run = true;
} elseif ($lastrun->value < time() - $interval) {
$orig = clone($lastrun);
$lastrun->value = time();
$lastrun->update($orig);
$run = true;
}
if ($run === true) {
// such as CronHourly, CronDaily, CronWeekly
Event::handle('Cron' . ucfirst($name));
}
}
}
}