public DecayingDouble Add(TimeSpan halfLife, DecayingDouble amountToAdd)
{
if (!LastUpdatedUtc.HasValue)
{
return(new DecayingDouble(ValueAtTimeOfLastUpdate + amountToAdd.ValueAtTimeOfLastUpdate, amountToAdd.LastUpdatedUtc));
}
else if (!amountToAdd.LastUpdatedUtc.HasValue)
{
return(new DecayingDouble(ValueAtTimeOfLastUpdate + amountToAdd.ValueAtTimeOfLastUpdate, LastUpdatedUtc));
}
else if (LastUpdatedUtc.Value > amountToAdd.LastUpdatedUtc.Value)
{
return(new DecayingDouble(
ValueAtTimeOfLastUpdate + amountToAdd.GetValue(halfLife, LastUpdatedUtc.Value),
LastUpdatedUtc.Value));
}
else
{
return(new DecayingDouble(amountToAdd.ValueAtTimeOfLastUpdate + GetValue(halfLife, amountToAdd.LastUpdatedUtc.Value), amountToAdd.LastUpdatedUtc.Value));
}
}
public DecayingDouble Subtract(TimeSpan halfLife, DecayingDouble amountToRemove)
{
if (!LastUpdatedUtc.HasValue)
{
return(new DecayingDouble(ValueAtTimeOfLastUpdate - amountToRemove.ValueAtTimeOfLastUpdate, amountToRemove.LastUpdatedUtc));
}
else if (!amountToRemove.LastUpdatedUtc.HasValue)
{
return(new DecayingDouble(ValueAtTimeOfLastUpdate - amountToRemove.ValueAtTimeOfLastUpdate, LastUpdatedUtc));
}
else if (LastUpdatedUtc.Value > amountToRemove.LastUpdatedUtc.Value)
{
return
(new DecayingDouble(
ValueAtTimeOfLastUpdate - amountToRemove.GetValue(halfLife, LastUpdatedUtc.Value),
LastUpdatedUtc.Value));
}
else
{
return(new DecayingDouble(amountToRemove.ValueAtTimeOfLastUpdate - GetValue(halfLife, amountToRemove.LastUpdatedUtc.Value), amountToRemove.LastUpdatedUtc.Value));
}
}
public void SetValue(DecayingDouble source)
{
LastUpdatedUtc = source.LastUpdatedUtc;
ValueAtTimeOfLastUpdate = source.ValueAtTimeOfLastUpdate;
}
public void SubtractInPlace(TimeSpan halfLife, DecayingDouble amountToSubtract) => SubtractInPlace(halfLife, amountToSubtract.ValueAtTimeOfLastUpdate, amountToSubtract.LastUpdatedUtc);
public void AddInPlace(TimeSpan halfLife, DecayingDouble amountToAdd) => AddInPlace(halfLife, amountToAdd.ValueAtTimeOfLastUpdate, amountToAdd.LastUpdatedUtc);
