public bool ShowDescriptionOnDate(DateTime date)
{
return(ActiveWeekDays.Contains(date.DayOfWeek));
}
internal bool GetNextRecurDate(DateTime originDate, out DateTime nextDate)
{
if (!this.Recuring)
{
throw new InvalidOperationException();
}
if (this.ReccurPeriod == null)
{
throw new InvalidOperationException();
}
switch (ReccurPeriod.TimeUnit)
{
case ReccurPeriodTimeUnit.Daily:
nextDate = originDate.Date.AddDays(ReccurPeriod.TimeUnitCount);
return(!HasEndDate || nextDate <= EndDate);
case ReccurPeriodTimeUnit.Weekly:
nextDate = new DateTime();
if (ActiveWeekDays.Count == 0)
{
return(false);
}
// this week
var day = originDate.Date;
while (day.Date.AddDays(1).DayOfWeek > day.DayOfWeek)
{
day = day.AddDays(1);
if (ActiveWeekDays.Contains(day.DayOfWeek))
{
nextDate = day;
return(!HasEndDate || nextDate <= EndDate);
}
}
const int daysInWeek = 7;
//First day of next active week
day = day.AddDays(1 + daysInWeek * (ReccurPeriod.TimeUnitCount - 1));
do
{
if (ActiveWeekDays.Contains(day.DayOfWeek))
{
nextDate = day;
return(!HasEndDate || nextDate <= EndDate);
}
day = day.AddDays(1);
} while (day.DayOfWeek > day.AddDays(-1).DayOfWeek);
Debug.Fail("");
return(false);
case ReccurPeriodTimeUnit.Monthly:
nextDate = DayOfMonth.GetDateOfThisMonth(originDate);
if (nextDate <= originDate)
{
var nextMonth = DayOfMonthSettings.BeginingOfMonth(nextDate)
.AddMonths(ReccurPeriod.TimeUnitCount);
nextDate = DayOfMonth.GetDateOfThisMonth(nextMonth);
}
return(!HasEndDate || nextDate <= EndDate);
default:
throw new Exception("Unforseen enum value");
}
}