private PlayerResponse GetPlayer(int?playerId = null, string username = null)
{
var row = _context.Players
.Include(x => x.Badges)
.Include(x => x.Matches)
.ThenInclude(x => x.Match)
.Select(x => new {
LastMatch = x.Matches.OrderByDescending(x => x.Match.StartDate).FirstOrDefault(),
Player = x
})
.FirstOrDefault(x => string.IsNullOrEmpty(username) ? x.Player.Id == playerId : x.Player.Username == username);
if (row == null)
{
throw new NotFoundException("Player not found");
}
var response = _mapper.Map <PlayerResponse>(row.Player);
response.ConservativeRating = _ratingService.GetConservative(row.Player.RatingMean, row.Player.RatingDeviation);
if (row.LastMatch != null)
{
response.MatchId = row.LastMatch.MatchId.ToString();
var decayStep = _decayService.GetDecaySteps(row.LastMatch.DecayDays, row.LastMatch.Match.StartDate);
response.TotalDecay = _decayService.GetDecayValues(decayStep);
response.RegainDecay = _decayService.GetDecayValue(decayStep);
}
return(response);
}
public void RateMatch(Match match)
{
var gameInfo = new Moserware.Skills.GameInfo(
_ratingConfig.InitialMean,
_ratingConfig.InitialDeviation,
_ratingConfig.InitialMean / _ratingConfig.BetaDivisor,
_ratingConfig.InitialMean / _ratingConfig.DynamicsFactorDivisor,
_ratingConfig.DrawProbability
);
var teams = new List <Dictionary <Moserware.Skills.Player, Moserware.Skills.Rating> >();
var players = new Dictionary <MatchPlayer, Moserware.Skills.Player>();
foreach (var matchPlayer in match.MatchPlayers.OrderByDescending(x => x.IsWin))
{
var trueSkillPlayer = new Moserware.Skills.Player(matchPlayer.PlayerId);
var rating = new Moserware.Skills.Rating(matchPlayer.OldRatingMean, matchPlayer.OldRatingDeviation);
players.Add(matchPlayer, trueSkillPlayer);
var team = new Dictionary <Moserware.Skills.Player, Moserware.Skills.Rating>();
team.Add(trueSkillPlayer, rating);
teams.Add(team);
}
// Calculate the new ratings for each player, listing the winner first
var newRatings = Moserware.Skills.TrueSkillCalculator.CalculateNewRatings(gameInfo, teams, 1, 2);
// Save the new ratings back to the player entity
foreach (var matchPlayer in match.MatchPlayers)
{
var trueSkillPlayer = players[matchPlayer];
var newRating = newRatings[trueSkillPlayer];
matchPlayer.NewRatingMean = GetMean(matchPlayer.OldRatingMean, newRating.Mean);
matchPlayer.NewRatingDeviation = GetDeviation(matchPlayer.OldRatingDeviation, newRating.StandardDeviation);
if (matchPlayer.IsWin)
{
matchPlayer.DecayValue = _decayService.GetDecayValue(matchPlayer.DecayDays);
matchPlayer.DecayDays = Math.Max(0, matchPlayer.DecayDays - 1);
}
matchPlayer.RatingDelta = GetDelta(matchPlayer);
}
}