public async Task <UserExamResultDTOEnvelope> Handle(Request request, CancellationToken cancellationToken)
{
var userId = currentUserAccessor.GetCurrentUserId();
var userExam = await this.context.UserExams
.Include(e => e.Exam).Where(e => e.Id == request.UserExamId && e.UserId == userId && e.Exam.IsPublished == true).FirstOrDefaultAsync();
if (userExam == null)
{
throw new Exceptions.UserExamNotFoundException();
}
if (!userExam.EndedAt.HasValue)
{
await UserExam.UserExamHelper.EndUserExamIfTimeExpired(context, cancellationToken, userExam);
}
if (!userExam.EndedAt.HasValue)
{
throw new Exceptions.UserExamNotFoundException();
}
var userExamResult = await context.UserExamResults.FindAsync(userExam.Id);
if (userExamResult != null)
{
return(MakeEnvelope(userExamResult));
}
userExamResult = new Domain.UserExamResult()
{
UserExamId = userExam.Id
};
userExamResult.QuestionCount = context.Questions.Where(e => e.ExamId == userExam.ExamId).Count();
var userExamQuestionAnswers = context.UserExamQuestions.Where(e => e.UserExamId == userExam.Id)
.Include(e => e.UserExamQuestionAnswers).ToArray();
foreach (var userExamQuestionAnswer in userExamQuestionAnswers)
{
userExamQuestionAnswer.HasRightAnswer = IsRight(userExamQuestionAnswer);
}
userExamResult.AnsweredQuestionCount = userExamQuestionAnswers.Length;
userExamResult.NotAnsweredQuestionCount = userExamResult.QuestionCount - userExamResult.AnsweredQuestionCount;
userExamResult.RightAnswerCount = userExamQuestionAnswers.Where(e => e.HasRightAnswer == true).Count();
userExamResult.WrongAnswerCount = userExamQuestionAnswers.Where(e => e.HasRightAnswer == false).Count();
userExamResult.IsPassed = (float)userExamResult.RightAnswerCount / (float)userExamResult.QuestionCount * 100
>= userExam.Exam.PassPercentage;
await context.UserExamResults.AddAsync(userExamResult);
await context.SaveChangesAsync();
context.Entry(userExamResult).Reload();
return(MakeEnvelope(userExamResult));
}
private UserExamResultDTOEnvelope MakeEnvelope(Domain.UserExamResult userExamResult)
{
var userExamResultDto = mapper.Map <Domain.UserExamResult, UserExamResultDTO>(userExamResult);
return(new UserExamResultDTOEnvelope(userExamResultDto));
}
