protected override IEnumerable <DateTime> GetNextOccurrencesInternal(DateTime startDate)
{
var byWeekDays = ByWeekDays?.ToList();
if (IsEmpty(byWeekDays))
{
byWeekDays = new List <DayOfWeek> {
startDate.DayOfWeek
};
}
var dayOffsets = byWeekDays.Select(day => (day - WeekStart + 7) % 7).Distinct().OrderBy(a => a).ToList();
var startOfWeek = Extensions.StartOfWeek(startDate, WeekStart);
while (true)
{
var b = true;
if (!IsEmpty(ByMonths))
{
if (!ByMonths.Contains((Month)startDate.Month))
{
b = false;
}
}
if (b)
{
foreach (var dayOffset in dayOffsets)
{
var next = startOfWeek.AddDays(dayOffset);
if (next >= startDate)
{
yield return(next);
}
}
}
startOfWeek = startOfWeek.AddDays(7 * Interval);
}
}
protected override IEnumerable <DateTime> GetNextOccurrencesInternal(DateTime startDate)
{
while (true)
{
var b = true;
if (!IsEmpty(ByMonths))
{
if (!ByMonths.Contains((Month)startDate.Month))
{
b = false;
}
}
if (!IsEmpty(ByMonthDays))
{
if (!ByMonthDays.Contains(startDate.Day))
{
b = false;
}
}
if (!IsEmpty(ByWeekDays))
{
if (!ByWeekDays.Contains(startDate.DayOfWeek))
{
b = false;
}
}
if (b)
{
yield return(startDate);
}
startDate = startDate.AddDays(Interval);
}
// ReSharper disable once FunctionNeverReturns (UNTIL & COUNT are handled by GetNextOccurrences)
}
protected override IEnumerable <DateTime> GetNextOccurrencesInternal(DateTime startDate)
{
if (IsEmpty(ByWeekDays))
{
ByWeekDays = new List <DayOfWeek> {
startDate.DayOfWeek
};
}
var dayOffsets = ByWeekDays.Select(day => ((day - WeekStart) + 7) % 7).Distinct().OrderBy(a => a).ToList();
var startOfWeek = startDate.StartOfWeek(WeekStart);
while (true)
{
var b = true;
if (!IsEmpty(ByMonths))
{
if (!ByMonths.Contains((Month)startDate.Month))
{
b = false;
}
}
if (b)
{
foreach (var dayOffset in dayOffsets)
{
var next = startOfWeek.AddDays(dayOffset);
if (next >= startDate)
{
yield return(next);
}
}
}
startOfWeek = startOfWeek.AddDays(7 * Interval);
}
// ReSharper disable once FunctionNeverReturns (UNTIL & COUNT are handled by GetNextOccurrences)
}
private List <DateTime> ResultByMonths(DateTime startOfYear)
{
List <DateTime> result = null;
if (!IsEmpty(ByMonths))
{
result = new List <DateTime>();
foreach (var month in ByMonths.Distinct().OrderBy(_ => _))
{
if (month >= Month.January && month <= Month.December)
{
for (var dt = startOfYear.AddMonths((int)month - 1); dt.Month == (int)month; dt = dt.AddDays(1))
{
result.Add(dt);
}
}
}
//result.Sort();
//result = FilterBySetPosition(result, BySetPositions).ToList();
}
return(result);
}
