public UserAnswers SaveSolution(QuizEvaluationDto quizSolution, string userId)
{
var quiz = this.quizzes.GetById(quizSolution.ForQuizId);
if (quizSolution.SelectedAnswerIds.Count != quiz.NumberOfQuestions &&
quizSolution.SelectedAnswerIds.Count != quiz.Questions.Count)
{
throw new Exception("Invalid Solution: Questions count mismatch");
}
List <Solutions> selectedAnswers = this.ExtractSelectedAnswers(quiz, quizSolution);
var newSolution = new UserAnswers
{
ByUserId = userId,
ForQuiz = quiz,
SelectedAnswers = selectedAnswers
};
try
{
this.solutions.Add(newSolution);
this.solutions.Save();
}
catch (Exception ex)
{
throw new Exception("Something went wrong while saving your solution.", ex);
}
return(newSolution);
}
private List <Solutions> ExtractSelectedAnswers(Quiz quiz, QuizEvaluationDto quizSolution)
{
var result = quiz.Questions
.SelectMany(q => q.Answers)
.Where(a => quizSolution.SelectedAnswerIds.Any(id => id == a.Id))
.ToList();
return(result);
}
public IHttpActionResult Solve(QuizEvaluationDto model)
{
if (!this.ModelState.IsValid)
{
return(this.BadRequest(this.ModelState));
}
try
{
var result = this.quizEvaluationService.SaveSolution(model, this.UserId);
return(this.Ok(this.quizEvaluationService.Evaluate(result)));
}
catch (Exception ex)
{
return(this.BadRequest(ex.Message));
}
}
public ActionResult Solve(QuizEvaluationDto solution)
{
if (!this.ModelState.IsValid)
{
this.TempData["error"] = "Invalid Solution Data";
return(this.RedirectToAction("Solve"));
}
try
{
var result = this.quizEvaluationService.SaveSolution(solution, this.UserId);
return(this.RedirectToAction("Performance", "Results", new { solutionId = result.Id }));
}
catch (Exception ex)
{
this.TempData["error"] = ex.Message;
return(this.RedirectToAction("Solve"));
}
}
