/// <summary>
/// Computes the given number of
/// </summary>
private void ComputeInCacheHourAverages(
DateTime Start, int Offset, int Count, Measurement[] Target)
{
for (int i = 0; i < Count; i++)
{
var hour = Start.AddHours(i + Offset);
Target[i + Offset] = MeasurementAggregation.Aggregate(hourData[hour], SensorId, hour);
}
}
/// <summary>
/// Gets the hour average for the given hour.
/// </summary>
private async Task <Measurement> GetRealHourAverageAsync(DateTime Hour)
{
if (hourAverages == null)
{
await FetchHourAveragesAsync();
}
Measurement result;
if (hourAverages.TryGetValue(Hour, out result))
{
return(result);
}
else
{
result = MeasurementAggregation.Aggregate(
await GetMeasurementsAsync(Hour), SensorId, Hour);
hourAverages[Hour] = result;
return(result);
}
}
/// <summary>
/// Gets the day average for the given day.
/// </summary>
private async Task <Measurement> GetRealDayAverageAsync(DateTime Day)
{
if (dayAverages == null)
{
await FetchDayAveragesAsync();
}
Measurement result;
if (dayAverages.TryGetValue(Day, out result))
{
return(result);
}
else
{
result = MeasurementAggregation.Aggregate(
await GetRealHourAveragesAsync(Day, 24),
SensorId, Day, Enumerable.Average);
dayAverages[Day] = result;
return(result);
}
}
/// <summary>
/// Gets the month-average for the given month.
/// </summary>
public async Task <Measurement> GetMonthAverageAsync(DateTime Month)
{
if (monthAverages == null)
{
await FetchMonthAveragesAsync();
}
Measurement result;
if (monthAverages.TryGetValue(Month, out result))
{
return(result);
}
else
{
var timeSpan = Month.AddMonths(1) - Month;
result = MeasurementAggregation.Aggregate(
await GetRealDayAveragesAsync(Month, (int)timeSpan.TotalDays),
SensorId, Month, Enumerable.Average);
monthAverages[Month] = result;
return(result);
}
}