public double Difference(DailyTimeSeriesApiModel dailyTimeSeries, DateTime start, DateTime end)
{
var startQuote = GetStartQuote(dailyTimeSeries, start);
var endQuote = GetEndQuote(dailyTimeSeries, end);
return(endQuote.Close - startQuote.Open);
}
private DailyQuoteApiModel GetEndQuote(DailyTimeSeriesApiModel dailyTimeSeries, DateTime end)
{
var startQuote = dailyTimeSeries.DailyTimeSeries.SingleOrDefault(d => DateTime.Parse(d.Key) == end);
if (startQuote.Value == null)
{
startQuote = dailyTimeSeries.DailyTimeSeries
.Where(d => DateTime.Parse(d.Key) < end)
.OrderBy(d => DateTime.Parse(d.Key))
.Last();
}
return(startQuote.Value);
}
private DailyQuoteApiModel GetStartQuote(DailyTimeSeriesApiModel dailyTimeSeries, DateTime start)
{
var startQuote = dailyTimeSeries.DailyTimeSeries.SingleOrDefault(d => DateTime.Parse(d.Key) == start);
if (startQuote.Value == null)
{
startQuote = dailyTimeSeries.DailyTimeSeries
.Where(d => DateTime.Parse(d.Key) > start)
.OrderByDescending(d => DateTime.Parse(d.Key))
.First();
}
return(startQuote.Value);
}
