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phorge/src/infrastructure/daemon/workers/clock/PhabricatorDailyRoutineTriggerClock.php
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PhabricatorDailyRoutineTriggerClock.php
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<?php
/**
* Triggers a daily routine, like server backups.
*
* This clock triggers events every 24 hours, using UTC. It does not use a
* locale, and is intended for technical processes like backing up a server
* every night.
*
* Because UTC does not have daylight savings, the local hour when this event
* occurs will change over the course of the year. For example, from the
* perspective of a user in California, it might run backups at 3AM in the
* winter and 2AM in the summer. This is desirable for maintenance processes,
* but problematic for some human processes. Use a different clock if you're
* triggering a human-oriented event.
*
* The clock uses the time of day of the `start` epoch to calculate the time
* of day of the next event, so you can change the time of day when the event
* occurs by adjusting the `start` time of day.
*/
final class PhabricatorDailyRoutineTriggerClock
extends PhabricatorTriggerClock {
public function validateProperties(array $properties) {
PhutilTypeSpec::checkMap(
$properties,
array(
'start' => 'int',
));
}
public function getNextEventEpoch($last_epoch, $is_reschedule) {
$start_epoch = $this->getProperty('start');
if (!$last_epoch) {
$last_epoch = $start_epoch;
}
$start = new DateTime('@'.$start_epoch);
$last = new DateTime('@'.$last_epoch);
// NOTE: We're choosing the date from the last event, but the time of day
// from the start event. This allows callers to change when the event
// occurs by updating the trigger's start parameter.
$ymd = $last->format('Y-m-d');
$hms = $start->format('G:i:s');
$next = new DateTime("{$ymd} {$hms} UTC");
// Add a day.
// NOTE: DateInterval doesn't exist until PHP 5.3.0, and we currently
// target PHP 5.2.3.
$next->modify('+1 day');
return (int)$next->format('U');
}
}

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