/// <summary>
/// Determines the day kind for specified date in according to the month.
/// </summary>
public DayKind DetermineDayKindForDate(DateTime date)
{
DayKind dayKind = DayKind.General;
if (date.DayOfWeek == DayOfWeek.Saturday || date.DayOfWeek == DayOfWeek.Sunday)
{
dayKind = DayKind.Weekend;
}
if (date.Month != Month || date.Year != Year)
{
dayKind = DayKind.Filler;
}
return(dayKind);
}
/// <summary>
/// Gets the last kind of day based on the passed day time.
/// </summary>
/// <param name="date">The date</param>
/// <returns>The DateTime associated with the last kind of day passed.</returns>
public static DateTime GetLast(this DateTime date, DayKind dayKind)
{
if (dayKind <= DayKind.DayOfMonth)
{
int daysInMonth = DateTime.DaysInMonth(date.Year, date.Month);
DateTime lastDayOfMonth = date.GetFirst(DayKind.DayOfMonth).AddDays(daysInMonth - 1);
if (dayKind == DayKind.DayOfMonth)
{
return(lastDayOfMonth);
}
int diff = (int)dayKind - (int)lastDayOfMonth.DayOfWeek;
if (diff > 0)
{
diff -= 7;
}
return(lastDayOfMonth.AddDays(diff));
}
if (dayKind <= DayKind.DayOfYear)
{
DateTime lastDayOfYear = date.Date.SetDate(month: 12, day: 31);
if (dayKind == DayKind.DayOfYear)
{
return(lastDayOfYear);
}
if (dayKind >= DayKind.SundayOfYear && dayKind <= DayKind.SaturdayOfYear)
{
var inMonthDayKind = (DayKind)((int)dayKind & ~0b01000);
return(date.GetLast(inMonthDayKind));
}
}
if (dayKind == DayKind.DayOfWeek)
{
return(date.DayOfWeek == DayOfWeek.Saturday ? date.Date : date.GetNext(DayOfWeek.Saturday));
}
throw new ArgumentOutOfRangeException(nameof(dayKind));
}
/// <summary>
/// Gets the first kind of day based on the passed day time.
/// </summary>
/// <param name="date">The date</param>
/// <param name="dayKind">The kind of day</param>
/// <returns>The DateTime associated with the first kind of day passed.</returns>
public static DateTime GetFirst(this DateTime date, DayKind dayKind)
{
date = date.Date;
if (dayKind <= DayKind.DayOfMonth)
{
DateTime firstDayOfMonth = date.AddDays(1 - date.Day);
if (dayKind == DayKind.DayOfMonth)
{
return(firstDayOfMonth);
}
if (firstDayOfMonth.DayOfWeek != (DayOfWeek)dayKind)
{
return(firstDayOfMonth.GetNext((DayOfWeek)dayKind));
}
return(firstDayOfMonth);
}
if (dayKind <= DayKind.DayOfYear)
{
DateTime firstDayOfYear = date.SetDate(month: 1, day: 1);
if (dayKind == DayKind.DayOfYear)
{
return(firstDayOfYear);
}
if (dayKind >= DayKind.SundayOfYear && dayKind <= DayKind.SaturdayOfYear)
{
var inMonthDayKind = (DayKind)((int)dayKind & ~0b01000);
return(date.GetFirst(inMonthDayKind));
}
}
if (dayKind == DayKind.DayOfWeek)
{
return(date.DayOfWeek == DayOfWeek.Sunday ? date : date.GetPrevious(DayOfWeek.Sunday));
}
throw new ArgumentOutOfRangeException(nameof(dayKind));
}
public TimePeriod(Int64 id, SimpleTime begin, SimpleTime end, DayKind dayKind) => (Id, Begin, End, DayKind) = (id, begin, end, dayKind);
