// Start a topic test.
public async Task <ActionResult> TopicTest(int?id)
{
try
{
// I.Checks.
// Check id.
if (!int.TryParse(id.ToString(), out int intId))
{
return(RedirectToAction("Index"));
}
// Get courseDTO object.
TopicDTO topicDTO = await TopicService.GetAsync(intId);
if (topicDTO == null)
{
return(RedirectToAction("Index"));
}
//Get courseDTO object.
CourseDTO courseDTO = await CourseService.GetAsync(topicDTO.CourseId);
if (courseDTO == null)
{
return(RedirectToAction("Index"));
}
// II. Set ViewBag properties.
ViewBag.CourseName = courseDTO.CourseTitle;
ViewBag.TopicName = topicDTO.TopicTitle;
ViewBag.TopicId = intId;
// III. AutoMapper Setup.
var config = new MapperConfiguration(cfg =>
{
cfg.CreateMap <QuestionDTO, UserQuestionAnswersViewModel>()
.ForMember("Question", opt => opt.MapFrom(obj => obj.QuestionText))
.ForMember("AnswerType", opt => opt.MapFrom(obj => obj.AnswerType.AnswerTypeDescription))
.ForMember("AvailableUserAnswers", opt => opt.MapFrom(obj => obj.Answers))
.ForMember("QuestionWeight", opt => opt.MapFrom(obj => obj.QuestionWeight))
.ForMember(q => q.SelectedUserAnswers, option => option.Ignore())
.ForMember(q => q.PostedUserAnswers, option => option.Ignore());
cfg.CreateMap <AnswerDTO, UserAnswer>()
.ForMember("Id", opt => opt.MapFrom(obj => obj.AnswerId))
.ForMember("Answer", opt => opt.MapFrom(obj => obj.AnswerText))
.ForMember("IsSelected", opt => opt.MapFrom(obj => obj.IsProper));
});
IMapper iMapper = config.CreateMapper();
// IV. Get data for a view.
IList <QuestionDTO> source = await TestingService.GetRandomQuestionsForTopic(intId);
IEnumerable <UserQuestionAnswersViewModel> topicTestQuestionList = iMapper.Map <IEnumerable <QuestionDTO>, IEnumerable <UserQuestionAnswersViewModel> >(source);
// V. Set properties: TestQuetions, AllAnswers and UserAnswers.
TestQuetions = topicTestQuestionList.ToList();
AllAnswers.Clear();
UserAnswers.Clear();
foreach (var item in topicTestQuestionList)
{
AllAnswers[item.QuestionId] = item.AvailableUserAnswers.ToList();
UserAnswers[item.QuestionId] = new List <UserAnswer>();
}
// VI. Set Timer.
TestPeriod = courseDTO.TimeToAnswerOneQuestion * topicTestQuestionList.Count();
StartTestTime = DateTime.Now;
// VII.
return(View(topicTestQuestionList));
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
