TapTimeCalculator

gistfile1.cs

 public class TapTimeCalculator : ITapTimeCalculator
    {
        readonly ILastTappedHeatFetcher _lastTappedHeatFetcher;

        public TapTimeCalculator(ILastTappedHeatFetcher lastTappedHeatFetcher)
        {
            _lastTappedHeatFetcher = lastTappedHeatFetcher;
        }

        #region ITapTimeCalculator Members

        public DateTime Calculate(DateTime predictedHeatStartTime)
        {
            TappedHeat tappedHeat = _lastTappedHeatFetcher.Fetch();
            TimeSpan timeBetweenStartAndTapTimes = tappedHeat.ActualTapTime - tappedHeat.StartDate;
            return predictedHeatStartTime.Add(timeBetweenStartAndTapTimes);
        }

        #endregion
    }