public static bool ContainsDayOfWeek(this ITimePeriod dateTimeRange, DayOfWeek dayOfWeek)
{
if (dateTimeRange.TotalDays() >= 7)
{
return(true);
}
//Sunday 0
//Monday 1
//Tuesday 2
//Wednesday 3
//Thursday 4
//Friday 5
//Saturday 6
var firstDayOfTheWeekIndex = (int)dateTimeRange.FirstDay.DayOfWeek;
var lastDayOfTheWeekIndex = (int)dateTimeRange.LastDay.DayOfWeek;
var dayOfWeekIndex = (int)dayOfWeek;
if (firstDayOfTheWeekIndex > lastDayOfTheWeekIndex)
{
//eg start Friday 5, end Tuesday 2, test Monday 1
//eg start Friday 5, end Tuesday 2, test Saturday 6
return(dayOfWeekIndex >= firstDayOfTheWeekIndex || dayOfWeekIndex <= lastDayOfTheWeekIndex);
}
else
{
//eg start Sunday 0, end Thursday 4, test Monday 1
return(dayOfWeekIndex >= firstDayOfTheWeekIndex && dayOfWeekIndex <= lastDayOfTheWeekIndex);
}
}
