public static NormalizedValuesResult ComputeNormalizedValues(NormalizedValuesParameters request)
{
var result = new NormalizedValuesResult
{
NewReferenceReading = request.StartMeterReading
};
var startBucketNumber = request.StartDate.BucketNumber();
var endBucketNumber = request.CurrentMessage.Timestamp.BucketNumber();
for (int bucket = startBucketNumber + 1; bucket <= endBucketNumber; bucket++)
{
var normalizedValue = GetIntermediateValue(request, bucket.BucketDate());
result.NormalizedValues.Add(normalizedValue);
result.NewReferenceDate = normalizedValue.Timestamp;
result.NewReferenceReading = normalizedValue.MeterReading;
}
return(result);
}
private static NormalizedMeterReading GetIntermediateValue(NormalizedValuesParameters request, DateTime bucketDate)
{
if (bucketDate == request.CurrentMessage.Timestamp)
{
return(new NormalizedMeterReading(
bucketDate,
request.CurrentMessage.MeterReading - request.StartMeterReading,
request.CurrentMessage.MeterReading));
}
var millisecondsBetweenMessages = (decimal)(request.CurrentMessage.Timestamp - request.PreviousMessage.Timestamp).TotalMilliseconds;
var millisecondsFromPreviousMessage = (decimal)(bucketDate - request.PreviousMessage.Timestamp).TotalMilliseconds;
var totalConsumption = request.CurrentMessage.MeterReading - request.PreviousMessage.MeterReading;
var messageConsumption = totalConsumption * (millisecondsFromPreviousMessage / millisecondsBetweenMessages);
var bucketReading = request.PreviousMessage.MeterReading + messageConsumption;
var bucketConsumption = bucketReading - request.StartMeterReading;
return(new NormalizedMeterReading(
bucketDate,
bucketConsumption,
bucketReading));
}