private DateTime GetNextDateTimeForMonthlyByWeekAndDayFrequency(DateTime currentTime, ServiceSettings settings)
{
var firstDayOfMonth = new DateTime(currentTime.Year, currentTime.Month, day: 1);
var firstWeekOfMonth = firstDayOfMonth.AddDays((settings.DayOfWeek + 7 - firstDayOfMonth.DayOfWeek) % 7);
var daysToAdd = 7 * (settings.WeekOfMonth - 1);
var dayOfMonth = firstWeekOfMonth.AddDays(daysToAdd);
var dayOfMonthWithTime = dayOfMonth + settings.Time;
return(dayOfMonthWithTime);
}
private DateTime GetNextSchedulingTime()
{
ServiceSettings settings = this._serviceSettings;
DateTime currentTime = DateTime.UtcNow;
DateTime settingsDateTime = settings.Date;
switch (settings.Frequency)
{
case Frequency.Monthly:
{
DateTime next;
if (settings.IsLastDayOfMonth)
{
next = new DateTime(currentTime.Year, currentTime.Month, 1, settingsDateTime.Hour,
settingsDateTime.Minute, settingsDateTime.Second);
next = next.AddMonths(1).AddDays(-1);
if (DateTime.Compare(next, currentTime) < 0)
{
next = next.AddDays(1).AddMonths(1).AddDays(-1);
}
}
else
{
next = new DateTime(currentTime.Year, currentTime.Month, settingsDateTime.Day,
settingsDateTime.Hour, settingsDateTime.Minute, settingsDateTime.Second);
if (DateTime.Compare(next, currentTime) < 0)
{
next = next.AddMonths(1);
}
}
return(next);
}
case Frequency.MonthlyByWeekAndDay:
{
var next = this.GetNextDateTimeForMonthlyByWeekAndDayFrequency(currentTime, settings);
if (DateTime.Compare(next, currentTime) < 0)
{
next = this.GetNextDateTimeForMonthlyByWeekAndDayFrequency(currentTime.AddMonths(1), settings);
}
return(next);
}
case Frequency.Weekly:
{
DateTime next = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, settingsDateTime.Hour, settingsDateTime.Minute, settingsDateTime.Second);
next = next.AddDays((settings.DayOfWeek - next.DayOfWeek + 7) % 7);
if (DateTime.Compare(next, currentTime) < 0)
{
next = next.AddDays(7);
}
return(next);
}
case Frequency.Daily:
{
DateTime next = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, settingsDateTime.Hour, settingsDateTime.Minute, settingsDateTime.Second);
if (DateTime.Compare(next, currentTime) < 0)
{
next = next.AddDays(1);
}
return(next);
}
case Frequency.Once:
{
DateTime next = new DateTime(settingsDateTime.Year, settingsDateTime.Month, settingsDateTime.Day, settingsDateTime.Hour, settingsDateTime.Minute, settingsDateTime.Second);
if (DateTime.Compare(next, currentTime) < 0)
{
return(_checkpointFileDefaultDateTime);
}
return(next);
}
case Frequency.None:
{
return(_checkpointFileDefaultDateTime);
}
case Frequency.Hourly:
{
return(currentTime.AddMinutes(this._serviceSettings.HourlyFrequencyInMinutes));
}
default:
return(_checkpointFileDefaultDateTime);
}
}