/// <summary>
/// Initializes a new instance of the <see cref="QuizQuestionResultDTO"/> class.
/// </summary>
/// <param name="result">
/// The result.
/// </param>
public QuizQuestionResultDTO(QuizQuestionResult result)
{
this.quizQuestionResultId = result.Id;
this.questionId = result.QuestionRef.With(x => x.Id);
this.question = result.Question;
this.questionTypeId = result.QuestionType.With(x => x.Id);
this.isCorrect = result.IsCorrect;
}
private QuizQuestionResult ConvertDto(QuizQuestionResultDTO resultDTO, QuizResult quizResult)
{
var instance = new QuizQuestionResult
{
Question = resultDTO.question,
IsCorrect = resultDTO.isCorrect,
QuestionType = QuestionTypeModel.GetById(resultDTO.questionTypeId),
QuizResult = quizResult,
QuestionRef = QuestionModel.GetOneById(resultDTO.questionId).Value
};
return(instance);
}
private void CreateAnswers(QuizQuestionResultDTO dto, QuizQuestionResult result)
{
foreach (var answerString in dto.answers)
{
var answer = new QuizQuestionResultAnswer();
try
{
answer.QuizQuestionResult = result;
answer.Value = answerString;
switch (result.QuestionType.Id)
{
case (int)QuestionTypeEnum.SingleMultipleChoiceText:
if (int.TryParse(answerString, out var distractorId))
{
var distractor = result.QuestionRef.Distractors.FirstOrDefault(x => x.Id == distractorId);
if (distractor != null)
{
answer.QuizDistractorAnswer = distractor;
answer.Value = distractor.DistractorName;
}
else
{
answer.Value = answerString;
}
}
else
{
answer.Value = answerString;
}
break;
default:
answer.Value = answerString;
break;
}
QuizQuestionResultAnswerModel.RegisterSave(answer);
}
catch (Exception ex)
{
Logger.ErrorFormat("Saving answers:" + ex);
}
}
}
private int SaveQuestionResult(OfflineQuizAnswerDTO[] answers, QuizDataDTO quizData, QuizResult postQuizResult)
{
var score = 0;
foreach (var answer in answers)
{
var questionResult = new QuizQuestionResult();
var question = quizData.questions.First(x => x.questionId == answer.questionId);
//var distractors = quizData.questions.Where(x => x.questionId == answer.questionId).ToList();
var distractors = DistractorModel.GetAllByQuestionId(answer.questionId).ToList();
questionResult.Question = question.question;
var questionObj = QuestionModel.GetOneById(question.questionId).Value;
questionResult.QuestionRef = questionObj;
questionResult.QuestionType = questionObj.QuestionType;
questionResult.QuizResult = postQuizResult;
if (answer.trueFalseAnswer != null)
{
var shouldBeOneDistractor = distractors.FirstOrDefault();
if (shouldBeOneDistractor == null)
{
throw new InvalidOperationException("There should be a distractor for true/false question");
}
var isCorrect = answer.trueFalseAnswer.answer == (shouldBeOneDistractor.IsCorrect ?? false);
if (isCorrect)
{
score++;
}
questionResult.IsCorrect = isCorrect;
QuizQuestionResultModel.RegisterSave(questionResult, true);
}
if (answer.singleChoiceAnswer != null)
{
var quizDistractorAnswer = DistractorModel.GetOneById(answer.singleChoiceAnswer.answeredDistractorId).Value;
var quizQuestionResultAnswer = new QuizQuestionResultAnswer
{
QuizQuestionResult = questionResult,
Value = quizDistractorAnswer.DistractorName,
QuizDistractorAnswer = quizDistractorAnswer,
};
var distractor = distractors.FirstOrDefault(x => x.Id == quizDistractorAnswer.Id);
if (distractor == null)
{
throw new InvalidOperationException("How come answered distractor id is not present in question distractors???");
}
var isCorrect = distractor.IsCorrect ?? false;
if (isCorrect)
{
score++;
}
questionResult.IsCorrect = isCorrect;
QuizQuestionResultModel.RegisterSave(questionResult, true);
QuizQuestionResultAnswerModel.RegisterSave(quizQuestionResultAnswer);
}
if (answer.multiChoiceAnswer != null)
{
var correctDistractors = distractors.Where(x => x.IsCorrect ?? false).Select(x => x.Id);
var isCorrect = correctDistractors.SequenceEqual(answer.multiChoiceAnswer.answeredDistractorIds);
if (isCorrect)
{
score++;
}
questionResult.IsCorrect = isCorrect;
QuizQuestionResultModel.RegisterSave(questionResult, true);
foreach (var answeredDistractorId in answer.multiChoiceAnswer.answeredDistractorIds)
{
var distrator = distractors.First(x => x.Id == answeredDistractorId);
var quizQuestionResultAnswer = new QuizQuestionResultAnswer
{
QuizQuestionResult = questionResult,
Value = distrator.DistractorName,
QuizDistractorAnswer = distrator,
};
QuizQuestionResultAnswerModel.RegisterSave(quizQuestionResultAnswer);
}
}
}
return(score);
}
