private static DateTime GetPreviousTradingDay(List <CompiledScheduleTimeInterval>
compiledSchedule, CompiledScheduleTimeInterval currentInterval, DateTime currentDateTime)
{
if (currentInterval.Enabled())
{
return(currentDateTime.Date);
}
var timestampBeforeCurrentIntervalStart = currentInterval.Start.AddTicks(-1);
// search for the interval just before the current interval started
var previousInterval = compiledSchedule
.Where(x => IsBetween(timestampBeforeCurrentIntervalStart, x.Start, x.End))
.OrderByDescending(x => x.Schedule.Rank)
.FirstOrDefault();
// if trading was enabled, then at that moment was the last trading day
if (previousInterval.Enabled())
{
return(timestampBeforeCurrentIntervalStart.Date);
}
// if no, there was one more disabled interval and we should go next
return(GetPreviousTradingDay(compiledSchedule, previousInterval, previousInterval.Start));
}
private static DateTime GetNextTradingDay(List <CompiledScheduleTimeInterval>
compiledSchedule, CompiledScheduleTimeInterval currentInterval, DateTime currentDateTime, DateTime lastTradingDay)
{
// search for the interval right after the current interval finished
var ordered = compiledSchedule
.Where(x => x.End > (currentInterval?.End ?? currentDateTime) ||
currentInterval != null && x.Schedule.Rank > currentInterval.Schedule.Rank &&
x.End > currentInterval.End)
.OrderBy(x => x.Start)
.ThenByDescending(x => x.Schedule.Rank)
.ToList();
var nextInterval = ordered.FirstOrDefault();
if (nextInterval == null)
{
if (!currentInterval.Enabled() && currentInterval.End.Date > lastTradingDay.Date)
{
return(currentInterval.End);
}
else // means no any intervals (current or any in the future)
{
return(currentDateTime.Date.AddDays(1));
}
}
var stateIsChangedToEnabled = nextInterval.Schedule.IsTradeEnabled != currentInterval.Enabled() && nextInterval.Enabled();
var intervalIsMissing = currentInterval != null && nextInterval.Start > currentInterval.End;
if (stateIsChangedToEnabled || intervalIsMissing && currentInterval.End.Date > lastTradingDay.Date)
{
// ReSharper disable once PossibleNullReferenceException
// if status was changed and next is enabled, that means current interval is disable == it not null
return(currentInterval.End);
}
// if we have long enabled interval with overnight, next day will start at 00:00:00
if (currentInterval.Enabled() && currentDateTime.Date.AddDays(1) < nextInterval.Start)
{
return(currentDateTime.Date.AddDays(1));
}
return(GetNextTradingDay(compiledSchedule, nextInterval, nextInterval.End.AddTicks(1), lastTradingDay));
}