/// <summary>
/// Returns a ValueTask + uses a cache
/// </summary>
/// <param name="StartDate"></param>
/// <returns></returns>
public static ValueTask <IEnumerable <HistoricalQuote> > GetHistoricalData(DateTime StartDate)
{
if (HistoricalDataCache?.Last().Date < StartDate)
{
return(new ValueTask <IEnumerable <HistoricalQuote> >(HistoricalDataCache.Where(n => n.Date >= StartDate)));
}
else
{
var task = HistoricalPriceReader.GetNewerThan(StartDate);
task.ContinueWith((n) => HistoricalDataCache = n.Result);
return(new ValueTask <IEnumerable <HistoricalQuote> >(task));
}
}
/// <summary>
/// Returns a Task + uses a cache
/// </summary>
/// <param name="StartDate"></param>
/// <returns></returns>
public static Task <IEnumerable <HistoricalQuote> > GetHistoricalData_TaskClassic(DateTime StartDate)
{
if (HistoricalDataCache_ForTaskClassic?.Last().Date < StartDate)
{
return(Task.FromResult(HistoricalDataCache_ForTaskClassic.Where(n => n.Date >= StartDate)));
}
else
{
var task = HistoricalPriceReader.GetNewerThan(StartDate);
task.ContinueWith((n) => HistoricalDataCache_ForTaskClassic = n.Result);
return(task);
}
}
