public async Task ExecuteAsync(AnswerQuestionCommand command)
{
var question = await _aggregateRepository.RetrieveAsync(command.QuestionId);
if (question.State.HasAcceptedAnswer)
{
throw new AnswerAlreadyAcceptedException(question.State.Id);
}
await question.FireEventAsync(
new QuestionAnsweredEvent(
command.QuestionId,
command.AnswerId,
command.UserId,
command.Description,
command.OccurredAtUtc,
DateTime.UtcNow));
await question.SaveAsync();
}
public async Task ExecuteAsync(LikeQuestionCommand command)
{
var question = await _aggregateRepository.RetrieveAsync(command.QuestionId);
if (question.State.UserId == command.UserId)
{
// TODO: Better Exception
throw new Exception();
}
if (question.State.LikedUsers.Any(x => x == command.UserId))
{
// TODO: Better Exception
throw new Exception();
}
await question.FireEventAsync(new QuestionLikedEvent(command.QuestionId, command.UserId, command.OccurredAtUtc, DateTime.UtcNow));
await question.SaveAsync();
}
public async Task ExecuteAsync(AcceptAnswerCommand command)
{
var processedAtUtc = _date.CurrentDateUtc();
var question = await _aggregateRepository.RetrieveAsync(command.QuestionId);
if (question.State.UserId != command.UserId)
{
throw new UserPermissionException();
}
if (question.State.HasAcceptedAnswer)
{
throw new AnswerAlreadyAcceptedException(command.QuestionId);
}
if (question.State.Answers.All(x => x.AnswerId != command.AnswerId))
{
throw new AnswerNotFoundException();
}
await question.FireEventAsync(new AnswerAcceptedEvent(command.QuestionId, command.AnswerId, command.OccurredAtUtc, processedAtUtc));
await question.SaveAsync();
}