public IActionResult Create(Assessment assessment, string[] Topics, int TimeLimit, int NumQuestions, int NumDays)
{
if (ModelState.IsValid)
{
if (TimeLimit <= 0)
{
TimeLimit = 10;
}
if (NumQuestions <= 0)
{
NumQuestions = 20;
}
if (NumDays <= 0)
{
NumDays = 7;
}
// Generate the times and Access Code
assessment.AccessCode = Guid.NewGuid().ToString();
assessment.CreatedDate = DateTime.Now;
assessment.ExpirationDate = DateTime.Now.AddDays(NumDays);
assessment.User = User.Identity.Name;
foreach (string TopicIdString in Topics)
{
int TopicIdInt = int.Parse(TopicIdString);
_context.Quizes.Add(
new Quiz()
{
Assessment = assessment,
Topic = _context.Topics.Single(m => m.TopicId == TopicIdInt),
NumberOfQuestions = NumQuestions,
NumberCorrect = 0,
TimeLimit = TimeLimit,
TimeStarted = null,
TimeCompleted = null,
});
}
_context.Assessments.Add(assessment);
_context.SaveChanges();
foreach (Quiz q in _context.Quizes.Where(q => q.AssessmentId == assessment.AssessmentId).ToList())
{
var List = _context.TopicQuestions.Where(x => x.TopicId == q.TopicId && x.IsActive == true).ToList();
if (List.Count() < q.NumberOfQuestions)
{
NumQuestions = List.Count();
}
int NumEasy = (int) Math.Ceiling(NumQuestions * 0.3);
int NumHard = (int) Math.Ceiling(NumQuestions * 0.3);
var EasyList = List.Where(x => x.DifficultyLevel == DifficultyLevels.Easy).ToList();
var MediumList = List.Where(x => x.DifficultyLevel == DifficultyLevels.Medium).ToList();
var HardList = List.Where(x => x.DifficultyLevel == DifficultyLevels.Hard).ToList();
var QuizList = new List<TopicQuestion>();
Random rand = new Random();
var QsUsed = new List<int>();
while (QsUsed.Count < NumEasy && QsUsed.Count != EasyList.Count)
{
int r = rand.Next(0, EasyList.Count());
if (!QsUsed.Contains(r))
{
QuizList.Add(EasyList[r]);
QsUsed.Add(r);
}
}
QsUsed = new List<int>();
while (QsUsed.Count < NumHard && QsUsed.Count != HardList.Count)
{
int r = rand.Next(0, HardList.Count());
if (!QsUsed.Contains(r))
{
QuizList.Add(HardList[r]);
QsUsed.Add(r);
}
}
QsUsed = new List<int>();
int total = NumQuestions - QuizList.Count;
while (QsUsed.Count < total && QsUsed.Count != MediumList.Count)
{
int r = rand.Next(0, MediumList.Count());
if (!QsUsed.Contains(r))
{
QuizList.Add(MediumList[r]);
QsUsed.Add(r);
}
}
QsUsed = new List<int>();
int i = 1;
while (QsUsed.Count < NumQuestions && QsUsed.Count != QuizList.Count)
{
int r = rand.Next(0, QuizList.Count());
if (!QsUsed.Contains(r))
{
_context.QuizQuestions.Add(
new QuizQuestion()
{
Quiz = q,
QuestionNumber = i++,
NextQuestionId = 0,
Question = QuizList[r],
});
QsUsed.Add(r);
}
}
q.NumberOfQuestions = QuizList.Count;
_context.SaveChanges();
int nextId = 0;
foreach (QuizQuestion qq in q.Questions.OrderByDescending(x => x.QuestionNumber))
{
qq.NextQuestionId = nextId;
nextId = qq.QuizQuestionId;
}
}
_context.SaveChanges();
return RedirectToAction("Code", new { id = assessment.AssessmentId });
}
// pass TopicList to ViewBag for Create View
ViewBag.Topics = _context.Topics.Where(x => x.Questions.Where(y => y.IsActive == true).Count() != 0);
return View(assessment);
}
public IActionResult Edit(Assessment assessment)
{
if (ModelState.IsValid)
{
_context.Update(assessment);
// TODO: this is throwing an error when trying to update.
_context.SaveChanges();
return RedirectToAction("Index");
}
return View(assessment);
}