public async Task <VoteGetModel> CastVoteAsync(VoteCreateModel voteModel)
{
var matchedVote = await _voteRepository
.GetSingleAsync(v => v.UserId == voteModel.UserId &&
(v.QuestionId == null || v.QuestionId == voteModel.TargetId) &&
(v.AnswerId == null || v.AnswerId == voteModel.TargetId) &&
(v.CommentId == null || v.CommentId == voteModel.TargetId));
if (matchedVote != null)
{
throw new BusinessException($"User already voted on {voteModel.VoteTarget} on '{matchedVote.CreatedOn}'.");
}
IVoteable target = await GetVoteableFromRepositoryAsync(voteModel.VoteTarget, voteModel.TargetId);
if (target == null)
{
throw new EntityNotFoundException(voteModel.VoteTarget.ToString(), voteModel.TargetId);
}
var vote = Vote.CreateVote(voteModel.UserId, target, voteModel.VoteType);
target.ApplyVote(vote);
await _uow.SaveAsync();
await ChangeCachedVotesSumAfterVoteCast(vote);
_eventRegister.RegisterEvent <VoteCast>(new { UserId = vote.UserId, VoteType = vote.VoteType });
return(_mapper.Map <VoteGetModel>(vote));
}
