Quartz.Impl.Triggers.DailyTimeIntervalTriggerImpl.AdvanceToNextDayOfWeekIfNecessary C# (CSharp) Method

        private DateTimeOffset? AdvanceToNextDayOfWeekIfNecessary(DateTimeOffset fireTime, bool forceToAdvanceNextDay)
        {
            // a. Advance or adjust to next dayOfWeek if need to first, starting next day with startTimeOfDay.
            TimeOfDay startTimeOfDay = StartTimeOfDay;
            DateTimeOffset fireTimeStartDate = startTimeOfDay.GetTimeOfDayForDate(fireTime).Value;
            DateTimeOffset fireTimeStartDateCal = CreateCalendarTime(fireTimeStartDate);
            DayOfWeek dayOfWeekOfFireTime = fireTimeStartDateCal.DayOfWeek;

            // b2. We need to advance to another day if isAfterTimePassEndTimeOfDay is true, or dayOfWeek is not set.
            ISet<DayOfWeek> daysOfWeek = DaysOfWeek;
            if (forceToAdvanceNextDay || !daysOfWeek.Contains(dayOfWeekOfFireTime))
            {
                // Advance one day at a time until next available date.
                for (int i = 1; i <= 7; i++)
                {
                    fireTimeStartDateCal = fireTimeStartDateCal.AddDays(1);
                    dayOfWeekOfFireTime = fireTimeStartDateCal.DayOfWeek;
                    if (daysOfWeek.Contains(dayOfWeekOfFireTime))
                    {
                        fireTime = fireTimeStartDateCal;
                        break;
                    }
                }
            }

            // Check fireTime not pass the endTime
            DateTimeOffset? endTime = EndTimeUtc;

            if (endTime != null && fireTime > endTime.Value)
            {
                return null;
            }

            return fireTime;
        }