private void SetFreeTextAnswer(StudentTestSessionQuestion question, QuestionFreeTextAnswer answer)
{
Assert.NotNull(answer, nameof(answer));
question.Answer.IsAnswered = true;
question.Answer.FreeTextAnswer.Answer = answer.Answer;
}
private void SetChoiceQuestionAnswer(StudentTestSessionQuestion question, ChoiceQuestionAnswer answer)
{
Assert.NotNull(answer, nameof(answer));
question.Answer.IsAnswered = true;
question.Answer.ChoiceQuestionAnswers = answer.Answers.LeftJoin(
question.Answer.ChoiceQuestionAnswers,
source => source,
destination => destination.OptionId,
source => new StudentChoiceQuestionAnswer
{
OptionId = source,
}, (source, destination) => destination)
.ToList();
}
private void SetAnswer(StudentTestSessionQuestion question, QuestionGenericAnswer answer)
{
switch (question.Question.Type)
{
case QuestionType.FreeText:
SetFreeTextAnswer(question, answer.FreeTextAnswer);
return;
case QuestionType.QuestionWithChoice:
SetChoiceQuestionAnswer(question, answer.ChoiceQuestionAnswer);
return;
default:
throw new InvalidEnumArgumentException(
nameof(question.Question.Type),
(int)question.Question.Type,
typeof(QuestionType));
}
}
public async Task Answer(Guid questionId, QuestionGenericAnswer answer)
{
// TODO: add includes to optimize query
var queryParameters = new StudentTestSessionQuestionQueryParameters
{
StudentId = _executionContextService.GetCurrentUserId(),
IsReadOnly = false,
Id = questionId,
};
StudentTestSessionQuestion question = await _unitOfWork.GetSingle(queryParameters);
await _studentQuestionValidationService.ThrowIfCannotAnswer(question.StudentTestSessionId);
SetAnswer(question, answer);
await _unitOfWork.Update(question);
await _unitOfWork.Commit();
}
