public async Task <Unit> Handle(AddVoteCommand request, CancellationToken cancellationToken)
{
if (!_topicsRepository.DoesTopicExist(request.TopicId))
{
throw new ArgumentException($"Topic with id {request.TopicId} doesn't exist");
}
if (_votesRepository.HadUserVote(request.TopicId, request.UserId))
{
throw new ArgumentException($"User with id {request.UserId} had already voted");
}
if (!_optionsRepository.DoesOptionExist(request.OptionId))
{
throw new ArgumentException($"Option with id {request.OptionId} doesn't exist");
}
var vote = _mapper.Map <Vote>(request);
await _votesRepository.CreateAsync(vote);
_logger.LogInformation("{Message} {VoteId} {OptionName} {TopicName} {CreatedBy}",
"Created vote in topic", vote.Id, vote.Option.Name, vote.Topic.Title, vote.User.UserName);
return(Unit.Value);
}
