private void GetDragAndDropResult(Question _question, DragAndDropAnswer dndAnswer, ref uint count)
{
var question = _question as DragAndDropQuestion;
_context.Entry(question).Collection(x => x.Options).Load();
_context.Entry(dndAnswer).Collection(x => x.DragAndDropAnswerOptions).Load();
if (dndAnswer.DragAndDropAnswerOptions == null || dndAnswer.DragAndDropAnswerOptions.Count == 0)
{
dndAnswer.Result = null;
dndAnswer.Score = 0;
}
else
{
var dndOptions = dndAnswer.DragAndDropAnswerOptions;
int optionsCount = dndOptions.Count(), wrongOrderCount = 0;
foreach (var dndOption in dndOptions)
{
if (dndOption.RightOptionId != dndOption.OptionId)
{
wrongOrderCount++;
}
}
var score = question.Score *
(optionsCount - wrongOrderCount) / (float)optionsCount;
dndAnswer.Score = score > 0 ? score : 0;
if (Math.Abs(dndAnswer.Score - question.Score) < EPSILON)
{
count++;
dndAnswer.Result = AnswerResult.Right;
}
else
{
dndAnswer.Result = score == 0 ? AnswerResult.Wrong : AnswerResult.PartiallyRight;
}
}
_context.Update(dndAnswer);
}
public async Task <IActionResult> Start(int testResultId, ErrorViewModel model)
{
var user = await _userManager.GetUserAsync(HttpContext.User);
var testResult = await _context.TestResults
.Include(tr => tr.Test)
.ThenInclude(t => t.Questions)
.SingleAsync(t => t.Id == testResultId);
if (testResult == null)
{
return(NotFound());
}
if (!testResult.Test.IsEnabled)
{
return(Forbid());
}
var questions = testResult.Test.Questions.Where(q => !q.IsDeleted).ToList();
if (questions.Count() == 0)
{
return(NotFound());
}
if (_context.Answers.Any(a => a.TestResult == testResult))
{
return(RedirectToAction("Answer", "Answer",
new
{
testResultId = testResult.Id,
answerId = _context.Answers.Where(a => a.TestResult == testResult)
.SingleOrDefault(a => a.Order == 1).Id
}));
}
var answers = new List <Answer>();
Answer answer = null;
if (testResult.Test.Count != 0 && testResult.Test.Count < questions.Count && testResult.Test.Shuffled)
{
var order = new ushort[testResult.Test.Count];
for (var i = 0; i < order.Length; i++)
{
order[i] = (ushort)(i + 1);
}
if (testResult.Test.Shuffled)
{
Shuffle(order);
}
var j = 0;
Shuffle(questions);
for (var k = 0; k < order.Length; k++)
{
var question = questions[k];
switch (question.QuestionType)
{
case "SingleChoiceQuestion":
answer = new SingleChoiceAnswer();
break;
case "MultiChoiceQuestion":
answer = new MultiChoiceAnswer();
break;
case "TextQuestion":
answer = new TextAnswer();
break;
case "DragAndDropQuestion":
answer = new DragAndDropAnswer();
break;
case "CodeQuestion":
answer = new CodeAnswer();
break;
}
if (answer == null)
{
throw new NullReferenceException();
}
answer.Result = null;
answer.Question = question;
answer.Score = 0;
answer.TestResult = testResult;
answer.Order = order[j++];
await _context.Answers.AddAsync(answer);
answers.Add(answer);
await _context.SaveChangesAsync();
}
}
else
{
var order = new ushort[questions.Count()];
for (var i = 0; i < order.Length; i++)
{
order[i] = (ushort)(i + 1);
}
if (testResult.Test.Shuffled)
{
Shuffle(order);
}
var j = 0;
foreach (var question in questions)
{
switch (question.QuestionType)
{
case "SingleChoiceQuestion":
answer = new SingleChoiceAnswer();
break;
case "MultiChoiceQuestion":
answer = new MultiChoiceAnswer();
break;
case "TextQuestion":
answer = new TextAnswer();
break;
case "DragAndDropQuestion":
answer = new DragAndDropAnswer();
break;
case "CodeQuestion":
answer = new CodeAnswer();
break;
}
if (answer == null)
{
throw new NullReferenceException();
}
answer.Question = question;
answer.Score = 0;
answer.TestResult = testResult;
answer.Order = order[j++];
await _context.Answers.AddAsync(answer);
answers.Add(answer);
await _context.SaveChangesAsync();
}
}
testResult.StartedOn = DateTime.UtcNow;
_context.TestResults.Update(testResult);
await _context.SaveChangesAsync();
// TODO: redirect to first answer (question)
//throw new NotImplementedException();
return(RedirectToAction("Answer", "Answer",
new { testResultId = testResult.Id, answerId = answers.SingleOrDefault(a => a.Order == 1).Id }));
}
private void StartTest(User user, TestResult testResult, Test test)
{
var answers = new List <Answer>();
Answer answer = null;
var questions = testResult.Test.Questions.Where(q => !q.IsDeleted).ToList();
testResult.TotalQuestions = (uint)questions.Count;
if (test.Count != 0 && test.Count < test.Questions.Count && testResult.Test.Shuffled)
{
var order = new ushort[testResult.Test.Count];
for (var i = 0; i < order.Length; i++)
{
order[i] = (ushort)(i + 1);
}
var j = 0;
for (var k = 0; k < order.Length; k++)
{
var question = questions[k];
switch (question.QuestionType)
{
case "SingleChoiceQuestion":
answer = new SingleChoiceAnswer();
break;
case "MultiChoiceQuestion":
answer = new MultiChoiceAnswer();
break;
case "TextQuestion":
answer = new TextAnswer();
break;
case "DragAndDropQuestion":
answer = new DragAndDropAnswer();
break;
case "CodeQuestion":
answer = new CodeAnswer();
break;
}
if (answer == null)
{
throw new NullReferenceException();
}
answer.Result = null;
answer.Question = question;
answer.Score = 0;
answer.TestResult = testResult;
answer.Order = order[j++];
_context.Answers.Add(answer);
answers.Add(answer);
_context.SaveChanges();
}
}
else
{
var order = new ushort[questions.Count()];
for (var i = 0; i < order.Length; i++)
{
order[i] = (ushort)(i + 1);
}
var j = 0;
foreach (var question in questions)
{
switch (question.QuestionType)
{
case "SingleChoiceQuestion":
answer = new SingleChoiceAnswer();
break;
case "MultiChoiceQuestion":
answer = new MultiChoiceAnswer();
break;
case "TextQuestion":
answer = new TextAnswer();
break;
case "DragAndDropQuestion":
answer = new DragAndDropAnswer();
break;
case "CodeQuestion":
answer = new CodeAnswer();
break;
}
if (answer == null)
{
throw new NullReferenceException();
}
answer.Question = question;
answer.Score = 0;
answer.TestResult = testResult;
answer.Order = order[j++];
_context.Answers.Add(answer);
answers.Add(answer);
_context.SaveChanges();
}
}
testResult.StartedOn = DateTime.UtcNow;
_context.TestResults.Update(testResult);
_context.SaveChanges();
}
