public async Task <LearningQuiz> CreateLearningQuizAsync(Guid quizId, string userId)
{
var isPublic = await _quizzesRepository.IsPublicAsync(quizId);
if (!isPublic)
{
var access = await _quizzesRepository.HaveReadAccessToQuizAsync(userId, quizId);
if (!access)
{
return(null);
}
}
var creationTime = CurrentTime;
var questionsQuery = _questionsRepository
.GetAllByQuizId(quizId)
.Where(q => q.CreationTime <= creationTime);
var learningQuiz = new LearningQuiz {
CreationTime = creationTime,
UserId = userId,
QuizId = quizId,
NumberOfQuestions = await questionsQuery.CountAsync()
};
var settings = await _userSettingsRepository.GetByIdOrDefault(userId);
var questions = questionsQuery
.Select(q => new LearningQuizQuestion {
QuestionId = q.Id,
Reoccurrences = settings.ReoccurrencesOnStart
});
await _learningQuizzesRepository.Create(learningQuiz);
_learningQuizzesRepository.AddQuestions(learningQuiz, questions);
var result = await Context.SaveChangesAsync() > 0;
return(result ? learningQuiz : null);
}
public async Task <IList <FlatQuestion> > QuestionsInQuizAsync(Guid quizId, string userId, long?maxTime = null)
{
var access = await _quizzesRepository.HaveReadAccessToQuizAsync(userId, quizId);
if (!access)
{
return(null);
}
return(await _questionsRepository
.GetAllByQuizId(quizId, maxTime)
.Include(q => q.Versions)
.Select(q => q.FlatVersionProps(maxTime))
.Select(q => new FlatQuestion {
Id = q.Id,
QuizId = q.QuizId,
Value = q.Value,
CreationTime = q.CreationTime
})
.ToListAsync());
}
private IQueryable <Question> RandomQuizQuestionsQuery(Guid id)
{
return(_questionsRepository
.GetAllByQuizId(id)
.Shuffle());
}