43 lines
1.4 KiB
C#
43 lines
1.4 KiB
C#
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using InnovEnergy.S3.Metadata;
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using InnovEnergy.S3.Records;
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using InnovEnergy.S3.Records.Specialized;
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using InnovEnergy.Time.Unix;
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namespace InnovEnergy.S3.Drivers.Internal.Util;
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internal class Sampler
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{
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public Record CurrentRecord { get; set; }
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public UnixTime CurrentTimeStamp { get; set; }
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public AggregationLevel AggregationLevel { get; }
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private UnixTimeSpan SamplePeriod => AggregationLevel.SamplePeriod;
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public Sampler(AggregationLevel aggregationLevel, Record record, UnixTime currentTime)
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{
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AggregationLevel = aggregationLevel;
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CurrentRecord = record;
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CurrentTimeStamp = aggregationLevel.GetPeriodStartTime(currentTime);
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}
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// TODO: repeat/max age
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public IEnumerable<AggregatedRecord> Sample(Record record, UnixTime timeStamp)
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{
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timeStamp = AggregationLevel.GetPeriodStartTime(timeStamp);
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if (timeStamp < CurrentTimeStamp)
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yield break; //throw new IndexOutOfRangeException(nameof(index)); // TODO: log
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if (timeStamp > CurrentTimeStamp)
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yield return new AggregatedRecord(CurrentRecord, AggregationLevel, CurrentTimeStamp);
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for (var t = CurrentTimeStamp + SamplePeriod; t < timeStamp; t += SamplePeriod)
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yield return new AggregatedRecord(Record.Empty, AggregationLevel, t);
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CurrentTimeStamp = timeStamp;
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CurrentRecord = record;
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}
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}
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