private async void Calculate()
{
if ((Until - Since).TotalDays <= 0)
{
return;
}
ResponseModel response = await _pk.GetSessionsInPeriod(_userId, Since, Until);
List <ParkingSession> sessions = new List <ParkingSession>((List <ParkingSession>)response.Data);
TimeSpan ts = Until - Since;
const int hr = 24;
List <KeyValuePair <int, double> > result = new List <KeyValuePair <int, double> >();
for (int i = 0; i < hr; i++)
{
List <ParkingSession> tmpPs = sessions.FindAll(ps => ps.PaymentDt != null && ps.ExitDt != null);
int fromPast = tmpPs.Count(ps => ps.EntryDt.Hour == i || ps.ExitDt.Value.Hour == i);
int fromActive = sessions.Count(ps => ps.PaymentDt != null && ps.ExitDt == null);
double rate = (fromPast + fromActive) / (ts.TotalDays + 1);
result.Add(new KeyValuePair <int, double>(i, rate));
}
Statistics = result;
}
