public static ReportPeriodRange GetRange(ReportPeriod period, DateTime to)
{
var data = new ReportPeriodRange()
{
Period = period,
To = to
};
if (period == ReportPeriod.Hour)
{
data.From = data.To.AddHours(-1);
}
else if (period == ReportPeriod.Day)
{
data.From = data.To.AddDays(-1);
}
else if (period == ReportPeriod.Week)
{
data.From = data.To.AddDays(-7);
}
else if (period == ReportPeriod.Month)
{
data.From = data.To.AddMonths(-1);
}
else
{
throw new Exception("Неизвестное значение period: " + period);
}
return(data);
}
public static ReportPeriodRange RoundToRight(ReportPeriodRange range, TimeSpan round)
{
var newRange = RoundToLeft(range, round);
if (newRange.From == range.From)
{
return(range);
}
return(new ReportPeriodRange()
{
Period = range.Period,
From = range.From + round,
To = range.To + round
});
}
public static ReportPeriodRange RoundToLeft(ReportPeriodRange range, TimeSpan round)
{
if (range == null)
{
throw new ArgumentNullException(nameof(range));
}
var fromYear = new DateTime(range.From.Year, 1, 1);
long fromMs = (long)(range.From - fromYear).TotalMilliseconds;
long roundMs = (long)round.TotalMilliseconds;
long times = (fromMs / roundMs);
var from = fromYear.AddMilliseconds(roundMs * times);
return(new ReportPeriodRange()
{
Period = range.Period,
From = from,
To = from.AddMilliseconds(roundMs * times)
});
}
