public QuestionResponseModel AddQuestion(QuestionRequestModel model)
{
this.SetCorrectContentType();
if (!this.IsModelValid(model))
{
throw new WebFaultException(HttpStatusCode.BadRequest);
}
var question = new Question();
question.Text = model.Text;
question.Category = this.LoadOrCreateCategory(model.Category);
question.DifficultyLevel = (DifficultyLevel)Enum.Parse(typeof(DifficultyLevel), model.Difficulty);
question.Answers = this.GetAnswersFrom(model);
this.data.Get<Question>()
.Add(question);
this.data.SaveChanges();
WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.Created;
return QuestionResponseModel.FromQuestion
.Compile().Invoke(question);
}
private bool IsModelValid(QuestionRequestModel model)
{
if (model == null)
{
return false;
}
if (string.IsNullOrEmpty(model.Category))
{
return false;
}
if (string.IsNullOrEmpty(model.Text))
{
return false;
}
if (string.IsNullOrEmpty(model.Difficulty))
{
return false;
}
if (model.CorrectAnswers == null || model.CorrectAnswers.Count() < 1)
{
return false;
}
if (model.WrongAnswers == null || model.WrongAnswers.Count() < 1)
{
return false;
}
return true;
}
private ICollection<Answer> GetAnswersFrom(QuestionRequestModel model)
{
var answers = new List<Answer>();
model.CorrectAnswers
.Select(text => new Answer(text, true))
.ForEach(answers.Add);
model.WrongAnswers
.Select(text => new Answer(text))
.ForEach(answers.Add);
return answers;
}