public static DateTimeOffset?GetNextFireTime(this SnapshotRule rule, DateTimeOffset from)
{
ICalendar calendar = rule.GetCalendar();
CronExpression cron = new CronExpression(rule.GeneratedCron);
DateTimeOffset?it = from;
do
{
it = cron.GetNextValidTimeAfter(it.Value);
if (it.HasValue)
{
if (calendar != null && !calendar.IsTimeIncluded(it.Value))
{
continue;
}
return(it.Value);
}
else
{
return(null);
}
} while (true);
}
public static int GetFireCountBetween(this SnapshotRule rule, DateTimeOffset from, DateTimeOffset to, CancellationToken cancel)
{
int count = 0;
ICalendar calendar = rule.GetCalendar();
CronExpression cron = new CronExpression(rule.GeneratedCron);
DateTimeOffset?it = from;
do
{
it = cron.GetNextValidTimeAfter(it.Value);
if (it.HasValue)
{
if (calendar != null && !calendar.IsTimeIncluded(it.Value))
{
continue;
}
else if (it.Value > to)
{
break;
}
count++;
}
else
{
break;
}
} while (cancel == null || cancel.IsCancellationRequested == false);
return(count);
}