public virtual PlaylistSongRating DetachSong(PlaylistSongRating playlistSongRating, FbUser user)
{
if (playlistSongRating != null)
{
Ratings.Remove(playlistSongRating);
NumberOfVotes -= playlistSongRating.Details.Count(detail=>detail.Rating!=0);
NumberOfVotes -= Math.Abs(playlistSongRating.AdminRating);
NumberOfSongs--;
//TODO: enhance this efficiency, move this to nhibernate layer. Currently alright for this usage, but might be heavy.
foreach (var detail in playlistSongRating.Details.Select(_detail=>_detail.VotingUser))
{
var userPlaylistInfo = detail.PlaylistsInfo.FirstOrDefault(pInfo => pInfo.Playlist == this);
if(userPlaylistInfo!= null)
userPlaylistInfo.NumOfVotes--;
}
//we don't reward the owner of the playlist, it's not fair
if (playlistSongRating.IsOwner(user.Id))
{
RewardUser(user, UserPlaylistInfo.Operation.DeleteSong);
if (playlistSongRating.Details.Any(details =>
details.VotingUser == user
&& details.Rating!=0))
{
RewardUser(user, UserPlaylistInfo.Operation.RemoveSongRating);
}
}
}
return playlistSongRating;
}