public async Task <QuestionDTOEnvelope> Handle(Request request, CancellationToken cancellationToken)
{
var userId = currentUserAccessor.GetCurrentUserId();
var question = context.Questions.Where(q => q.Id == request.Question.Id)
.Include(q => q.AnswerOptions).FirstOrDefault();
if (question == null)
{
throw new Exceptions.QuestionNotFoundException();
}
var examId = question.ExamId;
var exam = context.Exams.NotPublishedByIdAndUserId(examId, userId).FirstOrDefault();
if (exam == null)
{
throw new Exceptions.ExamNotFoundException();
}
var utcNow = DateTime.UtcNow;
var answers = request.Question.Answers;
bool hasAnswersChanged = false;
if (answers != null && answers.Count() > 0)
{
hasAnswersChanged = await SaveAnswers(question, utcNow, answers, cancellationToken);
}
question.Text = request.Question.Text ?? question.Text;
question.QuestionTypeId = request.Question.QuestionTypeId;
if (context.IsModified(question) || hasAnswersChanged)
{
question.UpdatedAt = utcNow;
}
await context.SaveChangesAsync();
var questionDto = mapper.Map <Domain.Question, QuestionDTO>(question);
return(new QuestionDTOEnvelope(questionDto));
}
public async Task <ExamDTOEnvelope> Handle(Request request, CancellationToken cancellationToken)
{
var userId = currentUserAccessor.GetCurrentUserId();
var examData = request.Exam;
var exam = await context.Exams.NotPublishedByIdAndUserId(request.Id, userId)
.IncludeTags()
.FirstOrDefaultAsync(cancellationToken);
if (exam == null)
{
throw new Exceptions.ExamNotFoundException();
}
exam.Title = examData.Title ?? exam.Title;
exam.Description = examData.Description ?? exam.Description;
exam.TimeInMinutes = examData.TimeInMinutes ?? exam.TimeInMinutes;
exam.PassPercentage = examData.PassPercentage ?? exam.PassPercentage;
exam.IsPrivate = examData.IsPrivate ?? exam.IsPrivate;
var examTagsToAdd = Array.Empty <Domain.ExamTag>();
var examTagsToDelete = Array.Empty <Domain.ExamTag>();
if (request.Exam.Tags != null)
{
var tags = await context.SaveTagsAsync(request.Exam.Tags ?? Enumerable.Empty <string>(), cancellationToken);
var examTags = exam.ExamTags;
examTagsToDelete = examTags.Where(et => !tags.Any(t => t.TagId == et.TagId)).ToArray();
examTagsToAdd = tags.Where(t => !examTags.Any(et => et.TagId == t.TagId))
.Select(t => new Domain.ExamTag()
{
Tag = t, TagId = t.TagId, Exam = exam, ExamId = exam.Id
}).ToArray();
}
if (context.IsModified(exam) || examTagsToAdd.Length > 0 || examTagsToDelete.Length > 0)
{
exam.UpdatedAt = DateTime.UtcNow;
}
await context.ExamTags.AddRangeAsync(examTagsToAdd, cancellationToken);
context.ExamTags.RemoveRange(examTagsToDelete);
await context.SaveChangesAsync(cancellationToken);
var examDto = mapper.Map <Domain.Exam, ExamDTO>(exam);
return(new ExamDTOEnvelope(examDto));
}
