private bool CheckDate(DateTime d)
{
if (ByMonth != null && !ByMonth.Contains(d.Month))
{
return(false);
}
//only for YEARLY
if (ByWeekNo != null)
{
var weekOfYear = d.GetWeekOfYear(this.WKST.DayOfWeek);
if (!ByWeekNo.Contains(weekOfYear) && !ByWeekNo.Contains(weekOfYear - (d.GetWeekOfYearCount(this.WKST.DayOfWeek) + 1)))
{
return(false);
}
}
if (ByYearDay != null && !ByYearDay.Contains(d.DayOfYear) && !ByYearDay.Contains(d.DayOfYear - (d.GetDaysInYear() + 1)))
{
return(false);
}
if (ByMonthDay != null && !ByMonthDay.Contains(d.Day) && !ByMonthDay.Contains(d.Day - d.GetDaysInMonth() + 1))
{
return(false);
}
if (ByDay != null && !ByDay.ToList().Exists(item => item.DayOfWeek == d.DayOfWeek))
{
return(false);
}
return(true);
}
public List <DateTime> GetDates(DateTime utcStartDate, DateTime fromDate, DateTime toDate, int maxCount, bool removeExDates = true)
{
var dates = new List <DateTime>();
var endDate = (this.Until == DateTime.MinValue ? toDate : (toDate > this.Until ? this.Until : toDate));
//push start date
dates.Add(utcStartDate);
DateTime d;
switch (Freq)
{
case Frequency.Secondly:
#region Secondly
d = utcStartDate.AddSeconds(this.Interval);
while (d <= endDate && CheckCount(dates, fromDate, maxCount))
{
if (CheckDate(d) && (ByHour == null || (ByHour != null && ByHour.Contains(d.Hour))) &&
(ByMinute == null || (ByMinute != null && ByMinute.Contains(d.Minute))) &&
(BySecond == null || (BySecond != null && BySecond.Contains(d.Second))))
{
if (d >= utcStartDate && d <= endDate && !dates.Contains(d))
{
dates.Add(d);
}
}
d = d.AddMinutes(this.Interval);
}
break;
#endregion
case Frequency.Minutely:
#region Minutely
d = utcStartDate.AddMinutes(this.Interval);
while (d <= endDate && CheckCount(dates, fromDate, maxCount))
{
if (CheckDate(d) && (ByHour == null || (ByHour != null && ByHour.Contains(d.Hour))) &&
(ByMinute == null || (ByMinute != null && ByMinute.Contains(d.Minute))))
{
//seconds
var seconds = new List <int>();
if (BySecond != null)
{
seconds.AddRange(BySecond);
}
else
{
seconds.Add(d.Second);
}
foreach (var s in seconds)
{
var newDate = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, s);
if (newDate >= utcStartDate && newDate <= endDate && !dates.Contains(newDate))
{
dates.Add(newDate);
}
}
}
d = d.AddMinutes(this.Interval);
}
break;
#endregion
case Frequency.Hourly:
#region Hourly
d = utcStartDate.AddHours(this.Interval);
while (d <= endDate && CheckCount(dates, fromDate, maxCount))
{
if (CheckDate(d) && (ByHour == null || (ByHour != null && ByHour.Contains(d.Hour))))
{
//minutes
var minutes = new List <int>();
if (ByMinute != null)
{
minutes.AddRange(ByMinute);
}
else
{
minutes.Add(d.Minute);
}
//seconds
var seconds = new List <int>();
if (BySecond != null)
{
seconds.AddRange(BySecond);
}
else
{
seconds.Add(d.Second);
}
foreach (var m in minutes)
{
foreach (var s in seconds)
{
var newDate = new DateTime(d.Year, d.Month, d.Day, d.Hour, m, s);
if (newDate >= utcStartDate && newDate <= endDate && !dates.Contains(newDate))
{
dates.Add(newDate);
}
}
}
}
d = d.AddHours(this.Interval);
}
break;
#endregion
case Frequency.Daily:
#region Daily
d = utcStartDate.AddDays(this.Interval);
while (d <= endDate && CheckCount(dates, fromDate, maxCount))
{
if (CheckDate(d))
{
GetDatesWithTime(ref dates, utcStartDate, endDate, d, new List <DateTime>()
{
d
});
}
d = d.AddDays(this.Interval);
}
break;
#endregion
case Frequency.Weekly:
#region Weekly
d = utcStartDate;
while (d <= endDate && CheckCount(dates, fromDate, maxCount))
{
var dateRange = new List <DateTime>();
for (var i = 0; i < 7; i++)
{
dateRange.Add(d.AddDays(i));
}
if (ByMonth != null)
{
dateRange.RemoveAll(date => !ByMonth.Contains(date.Month));
}
if (ByYearDay != null)
{
dateRange.RemoveAll(date => (!ByYearDay.Contains(date.DayOfYear) && !ByYearDay.Contains(date.DayOfYear - (date.GetDaysInYear() + 1))));
}
if (ByMonthDay != null)
{
dateRange.RemoveAll(date => (!ByMonthDay.Contains(date.Day) && !ByMonthDay.Contains(date.Day - (date.GetDaysInMonth() + 1))));
}
if (ByDay != null)
{
dateRange.RemoveAll(date => !ByDay.ToList().Exists(wd => wd.DayOfWeek == date.DayOfWeek));
}
if (ByDay == null && ByMonthDay == null && ByYearDay == null)
{
dateRange.RemoveAll(date => date.Day != d.Day);
}
GetDatesWithTime(ref dates, utcStartDate, endDate, d, dateRange);
d = d.AddDays(7 * this.Interval);
}
break;
#endregion
case Frequency.Monthly:
#region Monthly
d = utcStartDate;
while (d <= endDate && CheckCount(dates, fromDate, maxCount))
{
var dateRange = new List <DateTime>();
if (ByMonth != null && !ByMonth.Contains(d.Month))
{
d = d.AddMonths(this.Interval);
continue;
}
var day = new DateTime(d.Year, d.Month, 1);
while (day.Month == d.Month)
{
dateRange.Add(day);
day = day.AddDays(1);
}
if (ByYearDay != null)
{
dateRange.RemoveAll(date => (!ByYearDay.Contains(date.DayOfYear) && !ByYearDay.Contains(date.DayOfYear - (date.GetDaysInYear() + 1))));
}
if (ByMonthDay != null)
{
dateRange.RemoveAll(date => (!ByMonthDay.Contains(date.Day) && !ByMonthDay.Contains(date.Day - (date.GetDaysInMonth() + 1))));
}
//only for MONTHLY or YEARLY
if (ByDay != null)
{
var listDates = new List <DateTime>();
foreach (var date in ByDay)
{
listDates.AddRange(date.GetDates(new DateTime(d.Year, d.Month, 1), true));
}
dateRange.RemoveAll(date => !listDates.Contains(date));
}
if (ByDay == null && ByMonthDay == null && ByYearDay == null)
{
dateRange.RemoveAll(date => date.Day != d.Day);
}
GetDatesWithTime(ref dates, utcStartDate, endDate, d, dateRange);
d = d.AddMonths(this.Interval);
}
break;
#endregion
case Frequency.Yearly:
#region Yearly
d = utcStartDate;
if (d.Month == 2 && d.Day == 29)
{
if (Interval == 1 && ByMonth == null && ByWeekNo == null && ByYearDay == null && ByMonthDay == null && ByDay == null)
{
Interval = 4;
}
}
while (d.Year <= endDate.Year && CheckCount(dates, fromDate, maxCount))
{
var dateRange = new List <DateTime>();
bool isFirst = true;
if (ByMonth != null)
{
foreach (var m in ByMonth)
{
var date = new DateTime(d.Year, m, 1);
while (date.Month == m)
{
dateRange.Add(date);
date = date.AddDays(1);
}
}
isFirst = false;
}
//only for YEARLY
if (ByWeekNo != null)
{
if (isFirst)
{
var date = new DateTime(d.Year, 1, 1);
while (date.Year == d.Year)
{
var weekOfYear = date.GetWeekOfYear(this.WKST.DayOfWeek);
if (ByWeekNo.Contains(weekOfYear) || ByWeekNo.Contains(weekOfYear - (date.GetWeekOfYearCount(this.WKST.DayOfWeek) + 1)))
{
dateRange.Add(date);
}
date = date.AddDays(1);
}
}
else
{
dateRange.RemoveAll(date => {
var weekOfYear = date.GetWeekOfYear(this.WKST.DayOfWeek);
return((!ByWeekNo.Contains(weekOfYear) && !ByWeekNo.Contains(weekOfYear - (date.GetWeekOfYearCount(this.WKST.DayOfWeek) + 1))));
});
}
isFirst = false;
}
if (ByYearDay != null)
{
if (isFirst)
{
foreach (var yearDay in ByYearDay)
{
dateRange.Add(new DateTime(d.Year, 1, 1).AddDays((yearDay > 0 ? yearDay : (d.GetDaysInYear() + yearDay)) - 1));
}
}
else
{
dateRange.RemoveAll(date => (!ByYearDay.Contains(date.DayOfYear) && !ByYearDay.Contains(date.DayOfYear - (date.GetDaysInYear() + 1))));
}
isFirst = false;
}
if (ByMonthDay != null)
{
if (isFirst)
{
for (var m = 1; m <= 12; m++)
{
foreach (var day in ByMonthDay)
{
var dd = new DateTime(d.Year, m, 1);
dateRange.Add(dd.AddDays((day > 0 ? day : (dd.GetDaysInMonth() + day)) - 1));
}
}
}
else
{
dateRange.RemoveAll(date => (!ByMonthDay.Contains(date.Day) && !ByMonthDay.Contains(date.Day - (date.GetDaysInMonth() + 1))));
}
isFirst = false;
}
//only for MONTHLY or YEARLY
if (ByDay != null)
{
var listDates = new List <DateTime>();
foreach (var day in ByDay)
{
listDates.AddRange(day.GetDates(new DateTime(d.Year, 1, 1), false));
}
listDates.Sort();
if (isFirst)
{
dateRange.AddRange(listDates);
}
else
{
dateRange.RemoveAll(date => !listDates.Contains(date));
}
isFirst = false;
}
if (ByDay == null && ByMonthDay == null && ByYearDay == null && ByWeekNo == null)
{
dateRange.RemoveAll(date => date.Day != d.Day);
}
//add yearly same date
if (isFirst)
{
dateRange.Add(d);
}
GetDatesWithTime(ref dates, utcStartDate, endDate, d, dateRange);
d = d.AddYears(this.Interval);
}
break;
#endregion
}
if (Count >= 0)
{
var count = this.Count;
dates = dates.FindAll(date => (--count) >= 0);
}
if (removeExDates && ExDates != null)
{
foreach (var exDate in ExDates)
{
dates.RemoveAll(dt => (exDate.isDateTime && dt == exDate.Date) || (!exDate.isDateTime && dt.Date == exDate.Date));
}
}
dates.RemoveAll(dt => dt <fromDate || dt> endDate);
return(dates);
}