public Quotation GetDayQuotation(DateTime dateTime, int daysAgo)
{
var previousDay = dateTime.DayOfWeek == DayOfWeek.Sunday ? dateTime.AddDays(-1 - daysAgo).Date
: (dateTime.DayOfWeek == DayOfWeek.Monday ? dateTime.AddDays(-2 - daysAgo)
: dateTime.AddDays(0 - daysAgo));
if (!Interval.Equals(Inteval.D1))
{
var quotationByDay = Quotations.Where(x => x.Time.Date == previousDay.Date);
if (!quotationByDay.Any())
{
throw new DomainException("There is no previous quotations");
}
var open = quotationByDay.OrderBy(x => x.Time).FirstOrDefault().Open;
var high = quotationByDay.Max(x => x.High);
var low = quotationByDay.Min(x => x.Low);
var close = quotationByDay.OrderByDescending(x => x.Time).FirstOrDefault().Close;
var volume = quotationByDay.Sum(x => x.Volume);
return(new Quotation(previousDay.Date, open, low, high, close, volume));
}
return(Quotations.FirstOrDefault(x => x.Time.Date == previousDay.Date) ?? throw new DomainException("There is no previous day quotation."));
}