public IEnumerable <Player> GetRecommendedPlayers(long teamId)
{
var teamOwnerId = _context.TeamsData.Where(t => t.ProfileId == teamId).Select(t => t.OwnerId)
.Single();
if (!teamOwnerId.HasValue)
{
throw new Exception($"There is no team owner for team with teamId = {teamId}");
}
var teamOwners = _context.TeamsData.Where(t => t.OwnerId.HasValue)
.Select(t => t.OwnerId.GetValueOrDefault());
var reviewers = _context.Reviews.Where(r => r.Rate.HasValue && r.ReviewerProfileId != r.ProfileId)
.Select(r => r.ReviewerProfileId);
var reviewersTeamOwners = reviewers.Intersect(teamOwners);
var teamPlayers = _context.TeamsUsers.Select(tu => tu.UserProfileId);
var players = _context.Reviews.Where(r => teamOwners.Contains(r.ProfileId) == false)
.Select(r => r.ProfileId);
players = players.Where(p => teamPlayers.Contains(p) == false);
var reviewerIndexToId = reviewersTeamOwners.OrderBy(r => r).Distinct().ToList();
var playerIndexToId = players.OrderBy(p => p).Distinct().ToList();
var modelFilePath = "model.json";
Recommender recommender = new Recommender(modelFilePath);
long playerId;
double calculatedRating;
int teamOwnerIndex = reviewerIndexToId.IndexOf(teamOwnerId.Value);
var playerWithCalculatedRatings = new List <Player>();
for (int i = 0; i < playerIndexToId.Count; i++)
{
playerId = playerIndexToId[i];
calculatedRating = recommender.GetRating(teamOwnerIndex, i);
playerWithCalculatedRatings.Add(new Player {
Id = playerId, CalculatedRating = calculatedRating
});
}
playerWithCalculatedRatings.OrderByDescending(p => p.CalculatedRating);
foreach (var player in playerWithCalculatedRatings)
{
var profiles = _context.ProfilesRatings.Where(p => p.ProfileId == player.Id);
if (profiles.Count() > 0)
{
var ratings = profiles.Select(p => p.Rating);
player.AverageRating = ratings.Average();
}
}
playerWithCalculatedRatings = playerWithCalculatedRatings.Where(p => p.AverageRating > 0).ToList();
return(playerWithCalculatedRatings);
}
