// Create/Update/Delete methods
public async Task <Answer> CreateAnswerAsync(Answer answer, string userId)
{
var question = await _questionsRepository.GetById(answer.QuestionId);
if (question == null)
{
return(null);
}
var access = await _quizzesRepository.HaveWriteAccessToQuiz(userId, question.QuizId);
if (!access)
{
return(null);
}
var creationTime = CurrentTime;
answer.CreationTime = creationTime;
var version = new AnswerVersion {
CreationTime = creationTime,
Value = answer.Value,
IsCorrect = answer.IsCorrect
};
answer.Versions.Add(version);
answer.FlatVersionProps();
await _answersRepository.Create(answer);
var result = await Context.SaveChangesAsync() > 0;
return(result ? answer : null);
}
// Create/Update/Delete methods
public async Task <Question> CreateQuestionAsync(Question question, string userId)
{
var access = await _quizzesRepository.HaveWriteAccessToQuiz(userId, question.QuizId);
if (!access)
{
return(null);
}
var creationTime = CurrentTime;
question.CreationTime = creationTime;
var questionVersion = new QuestionVersion {
CreationTime = creationTime,
Value = question.Value
};
question.Versions.Add(questionVersion);
question.FlatVersionProps();
await _questionsRepository.Create(question);
return(await Context.SaveChangesAsync() > 0
? question
: null);
}
public async Task <IDictionary <QuizAccessEnum, IList <BasicUser> > > GetQuizUsersAsync(Guid quizId, string userId)
{
var access = await _quizzesRepository.HaveWriteAccessToQuiz(userId, quizId);
if (!access)
{
return(null);
}
var quiz = await _quizzesRepository
.GetAll()
.Where(q => q.Id == quizId)
.Include(q => q.Accesses)
.SingleOrDefaultAsync();
return(quiz?.Accesses
.Where(a => a.Access != QuizAccessEnum.None)
.GroupBy(a => a.Access)
.Select(async a => new KeyValuePair <QuizAccessEnum, IList <BasicUser> >(
a.Key,
(await _auth0UsersService.GetBasicUsersListByIds(a.Select(ac => ac.UserId).ToList())).ToList()
))
.Select(a => a.Result)
.ToDictionary(a => a.Key, a => a.Value));
}