public Variation TargettedVariation(string userId, List <Variation> whiteListedVariations)
{
int whiteListedVariationsLength = whiteListedVariations.Count;
RangeBucket <Variation> whiteListedVariationsList = new RangeBucket <Variation>();
Variation targettedVariation;
if (whiteListedVariationsLength == 0)
{
return(null);
}
else if (whiteListedVariationsLength == 1)
{
targettedVariation = whiteListedVariations[0];
}
else
{
whiteListedVariations = ScaleVariations(whiteListedVariations);
whiteListedVariationsList = GetVariationAllocationRanges(whiteListedVariations);
double maxVal = Constants.Variation.MAX_TRAFFIC_VALUE;
double multiplier = 1;
var bucketValue = this._userHasher.ComputeBucketValue(userId, Constants.Campaign.MAX_TRAFFIC_PERCENT, multiplier);
targettedVariation = whiteListedVariationsList.Find(bucketValue);
}
return(targettedVariation);
}
private RangeBucket <Variation> Bucket(IReadOnlyList <Variation> variations, string campaignKey)
{
RangeBucket <Variation> bucket = new RangeBucket <Variation>(Constants.Variation.MAX_TRAFFIC_VALUE);
foreach (var variation in variations)
{
bucket.Add(variation.Weight, variation, out double start, out double end);
LogInfoMessage.VariationRangeAllocation(file, campaignKey, variation.Name, variation.Weight, start, end);
}
return(bucket);
}
public RangeBucket <Variation> GetVariationAllocationRanges(List <Variation> variations)
{
int currentAllocation = 0;
RangeBucket <Variation> bucket = new RangeBucket <Variation>(Constants.Variation.MAX_TRAFFIC_VALUE);
foreach (var variation in variations)
{
int stepFactor = GetVariationBucketingRange(variation.Weight);
if (stepFactor != 0)
{
bucket.AddNew(variation, currentAllocation + 1, currentAllocation + stepFactor);
currentAllocation += stepFactor;
}
else
{
bucket.AddNew(variation, -1, -1);
}
}
return(bucket);
}