public IEnumerable <DateTime> GetScheduledTimes(DateTime start, TimeSpan howFarAhead)
{
IEnumerable <DateTime> monthDates;
var endDate = start + howFarAhead;
bool IsValid(DateTime dt) => dt >= start && dt <= endDate;
if (MonthsOfYear.Any())
{
var months = new List <DateTime>();
for (var monthDate = start; monthDate < endDate;)
{
months.Add(monthDate);
monthDate = monthDate.AddMonths(1);
monthDate = new DateTime(monthDate.Year, monthDate.Month, 1);
}
monthDates = months.ToArray();
}
else
{
monthDates = new[] { start };
}
IEnumerable <DateTime> dayDates;
if (!DaysOfMonth.Any() && !WeekDays.Any())
{
dayDates = new[] { start };
}
else
{
dayDates = monthDates.SelectMany(m => DaysOfMonth.Select(d => new DateTime(m.Year, m.Month, d, 0, 0, 0))).Where(IsValid);
var dayDates2 = monthDates.SelectMany(m => WeekDays.SelectMany(wd => DayOfWeekDatesForMonth(wd, m.Year, m.Month))).Where(IsValid);
if (dayDates.Any() && dayDates2.Any())
{
dayDates = dayDates.Intersect(dayDates2);
}
else
{
dayDates = dayDates.Concat(dayDates2);
}
}
if (Times.Any())
{
dayDates = dayDates.SelectMany(d => Times.Select(t => new DateTime(d.Year, d.Month, d.Day, t.Hour, t.Minute ?? 0, 0))).Where(IsValid);
}
if (Every.HasValue)
{
dayDates = dayDates.SelectMany(d => PartsInValidTime(d, Every.Value)).Where(IsValid);
}
return(dayDates);
}
public bool IsTime(DateTime currentTime)
{
if (MonthsOfYear.Any() && !MonthsOfYear.Any(x => (int)x == currentTime.Month))
{
return(false);
}
if (DaysOfMonth.Any() && !DaysOfMonth.Any(x => x == currentTime.Day))
{
return(false);
}
if (WeekDays.Any() && !WeekDays.Any(x => x == currentTime.DayOfWeek))
{
return(false);
}
if (Times.Any() && !Times.Any(x => x.IsTime(currentTime)))
{
return(false);
}
return(true);
}