private async Task Init(CMMNExecutionContext executionContext, CaseEltInstance elt, CancellationToken token)
{
var currentDateTime = DateTime.UtcNow;
var elapsedTime = ISO8601Parser.ParseTime(elt.GetTimerExpression().Body);
var repeatingInterval = ISO8601Parser.ParseRepeatingTimeInterval(elt.GetTimerExpression().Body);
if (repeatingInterval != null)
{
if (currentDateTime >= repeatingInterval.Interval.EndDateTime)
{
return;
}
var startDate = currentDateTime;
if (startDate < repeatingInterval.Interval.StartDateTime)
{
startDate = repeatingInterval.Interval.StartDateTime;
}
var diff = repeatingInterval.Interval.EndDateTime.Subtract(startDate);
var newTimespan = new TimeSpan(diff.Ticks / (repeatingInterval.RecurringTimeInterval));
for (var i = 0; i < repeatingInterval.RecurringTimeInterval; i++)
{
currentDateTime = currentDateTime.Add(newTimespan);
var newInstance = elt;
if (i > 0)
{
newInstance = executionContext.Instance.TryCreateInstance(elt);
}
await TrySubscribe(executionContext, newInstance, CMMNConstants.ExternalTransitionNames.Occur, token);
await _messageScheduler.SchedulePublish(currentDateTime, BuildEvent(executionContext.Instance.AggregateId, newInstance.Id), token);
}
}
if (elapsedTime != null)
{
if (currentDateTime >= elapsedTime)
{
return;
}
await TrySubscribe(executionContext, elt, CMMNConstants.ExternalTransitionNames.Occur, token);
await _messageScheduler.SchedulePublish(elapsedTime.Value, BuildEvent(executionContext.Instance.AggregateId, elt.Id), token);
}
}