protected override async Task <VoteView> HandleInput(VoteOnCommentParams input)
{
using (var connection = database.GetConnection()) {
IVoteRepo voteRepo = database.GetRepo <IVoteRepo>(connection);
ICommentRepo commentRepo = database.GetRepo <ICommentRepo>(connection);
IUserRepo userRepo = database.GetRepo <IUserRepo>(connection);
using (var transaction = connection.BeginTransaction()) {
Comment comment = (await commentRepo.FindById(input.CommentId)) !;
Vote? oldVote = await voteRepo.FindByUserAndComment(input.User.Username, input.CommentId);
// Wipe out the old one...
if (oldVote != null)
{
comment.RemoveVote(oldVote.Direction);
await voteRepo.Delete(oldVote);
comment.User.CommentKarma -= (int)oldVote.Direction;
}
// Create the new vote, and update the comment's karma cache.
Vote newVote = new Vote()
{
User = input.User,
ResourceType = VoteResourceType.Comment,
ResourceId = input.CommentId,
Direction = input.Vote
};
comment.AddVote(newVote.Direction);
comment.User.CommentKarma += (int)newVote.Direction;
await voteRepo.Add(newVote);
await commentRepo.Update(comment);
await userRepo.Update(comment.User);
transaction.Commit();
return(voteViewMapper.Map(newVote));
}
}
}