public static DateTime GetNextDate(DateTime priorDate, string daysOfWeekGrid, HolidayCalendarEnumeration holidayCalendar, IDateOperationsProvider dateOperationsProvider)
{
DateTime retValue = DateTime.MaxValue;
DateTime initialValue = new DateTime(priorDate.Year, priorDate.Month, priorDate.Day); // Remove the time information.
// Prevent looping up to year 9999.
const int maxCounter = 3650; // A decade.
int counter = 0;
bool nextDateFound = false;
while (!nextDateFound)
{
DateTime nextDate = initialValue.AddDays(1);
if (ScheduleOperations.DayIsValidDayForRun(priorDate, daysOfWeekGrid, holidayCalendar, dateOperationsProvider))
{
retValue = nextDate;
nextDateFound = true;
}
counter++;
if (maxCounter == counter)
{
throw new ArgumentException(String.Format("Unable to find next date for date {0} after {1} days.", priorDate, maxCounter));
}
}
return retValue;
}
public static bool DayIsValidDayForRun(DateTime day, string daysOfWeekGrid, HolidayCalendarEnumeration holidayCalendarEnumeration, IDateOperationsProvider dateOperationsProvider)
{
// Assume false.
bool retValue = false;
if (DaysOfWeekGrid.TrueOnDayOfWeek(day.DayOfWeek, daysOfWeekGrid))
{
IHolidayCalendar holidayCalender = HolidayCalendarFactory.Create(holidayCalendarEnumeration);
if (dateOperationsProvider.IsBusinessDay(day, holidayCalender))
{
retValue = true;
}
}
return retValue;
}
public DateTime CalculateNextScheduledTime(DateTime priorScheduledTime, IDateOperationsProvider dateOperationsProvider)
{
DateTime retValue = DateTime.MaxValue;
if (ScheduleOperations.DayIsValidDayForRun(priorScheduledTime, this.DaysOfWeek, this.HolidayCalendar, dateOperationsProvider))
{
DateTime scheduledTimeIfToday = this.ComputeScheduledTimeIfOnDay(priorScheduledTime);
bool alreadyRunToday = scheduledTimeIfToday <= priorScheduledTime;
if (!alreadyRunToday)
{
retValue = scheduledTimeIfToday;
return retValue;
}
}
// Get the next date to run.
DateTime nextDate = ScheduleOperations.GetNextDate(priorScheduledTime, this.DaysOfWeek, this.HolidayCalendar, dateOperationsProvider);
retValue = this.ComputeScheduledTimeIfOnDay(nextDate);
return retValue;
}
