Updating Schedules

Because sometimes we might need to update our SLA Schedules over time – without invalidating existing SLA calculations, sla-timer allows us to update the SLA with a new SLASchedule that will commence after the effectiveFrom date provided.

// Create our initial schedule
$sla = SLA::fromSchedule(
    SLASchedule::create()->from('09:00:00')->to('09:01:00')
        ->everyDay()
);

// Add our new superseded schedule, only starting after 27 July 2022
$sla->addSchedule(
    SLASchedule::create()->effectiveFrom('27-07-2022')
        ->from('09:00:00')->to('09:00:30')->onWeekdays()->and()
        ->from('09:00:00')->to('09:00:10')->onWeekends()
);

Then if we run our duration method across both our old schedule and our new schedule.

// Given the time now is 14:00:00 31-07-2022
$sla->duration('08:35:40 25-07-2022')->totalSeconds; // 230

Tables	Old Schedule	New Schedule
25th July	60s	30s
26th July	60s	30s
27th July	60s	30s
28th July	60s	30s
29th July	60s	30s
30th July	60s	10s
31st July	60s	10s
Total	120s	110s
	230s