private LeaderBoardPlayerDto CalculatePositionInLeaderBoard(GameEventSourceAdded @event)
{
var data = _gameEventSourceRepository.GetAll().GroupBy(x => x.UserId)
.Select(g => new { UserId = g.Key, Score = g.Sum(p => p.Score) })
.OrderByDescending(x => x.Score).ToList();
var allUsersRank = data.Select((p, i) => new LeaderBoardItemDto
{
UserRank = i + 1,
UserId = p.UserId,
UserScore = p.Score
}).ToList();
var leaderBorderPlayer = new LeaderBoardPlayerDto()
{
UserId = @event.UserId,
UserRank = allUsersRank?.SingleOrDefault(x => x.UserId == @event.UserId).UserRank ?? 0,
UserScore = allUsersRank?.SingleOrDefault(x => x.UserId == @event.UserId).UserScore ?? 0,
};
var userBehind = allUsersRank.SingleOrDefault(x => x.UserRank > leaderBorderPlayer.UserRank && x.UserRank == leaderBorderPlayer.UserRank + 1);
var userAhead = allUsersRank.SingleOrDefault(x => x.UserRank < leaderBorderPlayer.UserRank && x.UserRank == leaderBorderPlayer.UserRank - 1);
leaderBorderPlayer.LeaderBoardPlayerAhead = userAhead;
leaderBorderPlayer.LeaderBoardPlayerBehind = userBehind;
return(leaderBorderPlayer);
}
public async Task PublishUserLeaderBoradInfoAsync(LeaderBoardPlayerDto @event)
{
await _hubContextWrapper.PublishToAllAsync("user_leader_board_info_added",
new
{
userId = @event.UserId,
userRank = @event.UserRank,
userScore = @event.UserScore,
leaderBoardPlayerBehind = @event.LeaderBoardPlayerBehind,
leaderBoardPlayerAhead = @event.LeaderBoardPlayerAhead,
}
);
}
public async Task HandleAsync(GameEventSourceAdded @event, ICorrelationContext context)
{
var gameEventSource = await _gameEventSourceRepository.GetAsync(@event.Id);
if (gameEventSource != null)
{
gameEventSource.UpdateScoreAndIsWin(@event.Score, @event.IsWin);
await _gameEventSourceRepository.UpdateAsync(gameEventSource);
}
else
{
var gameSource = new GameEventSource(@event.Id, @event.IsWin, @event.Score, @event.UserId);
await _gameEventSourceRepository.AddAsync(gameSource);
}
_logger.LogInformation($"GameEventSource Added with id: '{@event.Id}'.");
LeaderBoardPlayerDto leaderBorderPlayer = CalculatePositionInLeaderBoard(@event);
await _hubService.PublishUserLeaderBoradInfoAsync(leaderBorderPlayer);
}
