public async Task <string> SubmitQuiz(string courseId, string slideIndex, string answer, bool isLti)
{
var intSlideIndex = int.Parse(slideIndex);
var course = courseManager.GetCourse(courseId);
var userId = User.Identity.GetUserId();
var slide = course.Slides[intSlideIndex];
var slideId = slide.Id;
if (visitsRepo.IsPassed(userId, slideId))
{
return("already answered");
}
var time = DateTime.Now;
var answers = JsonConvert.DeserializeObject <List <QuizAnswer> >(answer).GroupBy(x => x.QuizId);
var quizBlockWithTaskCount = course.Slides[intSlideIndex].Blocks.Count(x => x is AbstractQuestionBlock);
var incorrectQuizzes = new List <string>();
var fillInBlockType = typeof(FillInBlock);
var allQuizInfos = new List <QuizInfoForDb>();
foreach (var ans in answers)
{
var quizInfos = CreateQuizInfo(course, intSlideIndex, ans);
foreach (var quizInfo in quizInfos)
{
allQuizInfos.Add(quizInfo);
if (!quizInfo.IsRightAnswer && quizInfo.QuizType == fillInBlockType)
{
incorrectQuizzes.Add(ans.Key);
}
}
}
var blocksInAnswerCount = allQuizInfos.Select(x => x.QuizId).Distinct().Count();
if (blocksInAnswerCount != quizBlockWithTaskCount)
{
return("has empty blocks");
}
var score = allQuizInfos
.Where(forDb => forDb.IsRightQuizBlock)
.Select(forDb => forDb.QuizId)
.Distinct()
.Count();
foreach (var quizInfoForDb in allQuizInfos)
{
await userQuizzesRepo.AddUserQuiz(courseId, quizInfoForDb.IsRightAnswer, quizInfoForDb.ItemId, quizInfoForDb.QuizId,
slideId, quizInfoForDb.Text, userId, time, quizInfoForDb.IsRightQuizBlock);
}
await visitsRepo.AddAttempt(slideId, userId, score);
if (isLti)
{
LtiUtils.SubmitScore(slide, userId);
}
return(string.Join("*", incorrectQuizzes.Distinct()));
}