public async Task DeleteQuestionAsync(int questionId)
{
if (await DoesQuestionHaveUserAnswersAsync(questionId))
{
throw new Exception("A questão não pode ser excluída, pois usuários já responderam ela.");
}
foreach (var existingAnswer in await _answerRepository.FindAsync(a => a.QuestionId == questionId))
{
_answerRepository.Remove(existingAnswer);
}
var question = await FindQuestionByIdAsync(questionId);
_questionRepository.Remove(question);
await _unitOfWork.CommitAsync();
}
public async Task UpdateRankingAfterUserAnswerAsync(AnsweredQuestion answeredQuestion)
{
var question = await _questionRepository.FindAsync(answeredQuestion.QuestionId);
var answer = await _answerRepository.FindAsync(answeredQuestion.AnswerId);
if (!await _questionService.DoesAnswerBelongToQuestionAsync(answeredQuestion.AnswerId, answeredQuestion.QuestionId))
{
throw new Exception("A resposta não é uma das respostas possíveis para a questão.");
}
bool didUserCompleteTrack = await _questionService.HasUserFinishedTrackAsync(answeredQuestion.UserId, question.TrackId);
if (answer.IsAnswerCorrect || didUserCompleteTrack)
{
var trackRanking = (await _trackRankingRepository
.FindAsync(tr => tr.TrackId == question.TrackId && tr.UserId == answeredQuestion.UserId))
.FirstOrDefault();
if (answer.IsAnswerCorrect)
{
trackRanking.Points += (int)question.QuestionLevel;
}
if (didUserCompleteTrack)
{
trackRanking.CompletedTime = DateTime.UtcNow - trackRanking.StartedAtUtc;
}
_trackRankingRepository.Update(trackRanking);
await _unitOfWork.CommitAsync();
}
}
public async Task <ProcessResult> DeleteQuestionAsync(int questionId)
{
if (await DoesQuestionHaveUserAnswersAsync(questionId))
{
return(new ProcessResult {
Message = "A questão não pode ser excluída, pois usuários já responderam ela.", Result = false
});
}
foreach (var existingAnswer in await _answerRepository.FindAsync(a => a.QuestionId == questionId))
{
_answerRepository.Remove(existingAnswer);
}
var question = await FindQuestionByIdAsync(questionId);
_questionRepository.Remove(question);
await _unitOfWork.CommitAsync();
return(new ProcessResult {
Message = "Pergunta deletada com sucesso", Result = true
});
}
