private static PersonalizerRankResult GenerateRankResultInner(List <PersonalizerRankableAction> originalActions,
List <PersonalizerRankableAction> rankableActions, List <PersonalizerRankableAction> excludedActions, int[] rankedIndices, float[] rankingProbabilities, string eventId)
{
// excluded actions are not passed into VW
// rankedIndices[0] is the index of the VW chosen action (1 based index)
int chosenActionIndex = rankedIndices[0] - 1;
// take care of actions that are excluded in their original positions
if (excludedActions != null && excludedActions.Count > 0)
{
var newRanking = new int[originalActions.Count];
var probabilities = new float[originalActions.Count];
// at the original position
// point the original position of ranked item
for (int i = 0; i < rankableActions.Count; i++)
{
//RankableActions is Actions - ExcludedActions
newRanking[rankableActions[i].Index] = rankableActions[rankedIndices[i] - 1].Index + 1;
probabilities[rankableActions[i].Index] = rankingProbabilities[i];
}
// update excluded positions
foreach (var l in excludedActions)
{
newRanking[l.Index] = l.Index + 1;
}
rankedIndices = newRanking;
rankingProbabilities = probabilities;
}
// finalize decision response ranking
var rankings = rankedIndices?.Select((index, i) =>
{
var action = originalActions[index - 1];
return(new PersonalizerRankedAction(action.Id, rankingProbabilities[i]));
}).ToList();
// setting RewardActionId to be the VW chosen action.
var personalizerRankResult = new PersonalizerRankResult(rankings, eventId, rankableActions.ElementAt(chosenActionIndex)?.Id);
return(personalizerRankResult);
}
public async Task <Response <PersonalizerRankResult> > RankAsync(PersonalizerRankOptions rankRequest, CancellationToken cancellationToken = default)
{
if (rankRequest == null)
{
throw new ArgumentNullException(nameof(rankRequest));
}
using var message = CreateRankRequest(rankRequest);
await _pipeline.SendAsync(message, cancellationToken).ConfigureAwait(false);
switch (message.Response.Status)
{
case 201:
{
PersonalizerRankResult value = default;
using var document = await JsonDocument.ParseAsync(message.Response.ContentStream, default, cancellationToken).ConfigureAwait(false);
value = PersonalizerRankResult.DeserializePersonalizerRankResult(document.RootElement);
return(Response.FromValue(value, message.Response));
}
