/// <summary>
/// Checks whether the answer to a question is correct and returns the name
/// of the view that should be rendered in response to the answer.
/// </summary>
private string CheckAnswer(QuestionSetViewModel questionSet)
{
string viewName;
ModelState.Clear();
var questionDocument = Document.Children.FirstOrDefault(x => x.NodeDetails.UmbracoId == questionSet.QuestionId);
if (questionSet.Answer.AnswerIndex != questionDocument.QuestionDetails.CorrectAnswer.Value)
{
questionSet.Answer.AnswerIndex = -1;
questionSet.Reply = new QuestionSetViewModel.AnswerResponse()
{
Message = Dictionary <QuizmasterDictionary>().IncorrectAnswer
};
viewName = "_questionError";
}
else
{
questionSet.Reply = new QuestionSetViewModel.AnswerResponse()
{
Message = Dictionary <QuizmasterDictionary>().CorrectAnswer, Correct = true
};
viewName = "_questionCorrect";
}
questionSet.RequiredPartial = viewName;
return(viewName);
}
/// <summary>
/// An event raised whenever a QuestionSet document is being requested. The method
/// sets up a default viewmodel, which will be passed back and forth by the form postbacks or
/// ajax posts on the views.
/// </summary>
public void OnLoad(QuestionSet model, HttpContextBase httpContext, UmbracoContext umbContext, ApplicationContext appContext, CodeFirstModelContext modelContext, IPublishedContent currentPage, out QuestionSetViewModel viewModel)
{
viewModel = new QuestionSetViewModel()
{
MaxIndex = model?.Count - 1 ?? -1,
SetId = currentPage?.Id ?? -1,
QuestionIndex = model?.Count > 0 ? 0 : -1,
QuestionId = model.FirstOrDefault()?.NodeDetails?.UmbracoId ?? -1,
Answer = new QuestionSetViewModel.QuestionResponse()
{
AnswerIndex = -1
}
};
}
/// <summary>
/// Validates the answer
/// </summary>
public ActionResult ValidateAnswer(QuestionSetViewModel questionSet, bool isAjax = false)
{
if (isAjax)
{
//If async only render the relevant partial
string viewName;
viewName = CheckAnswer(questionSet);
return(View(viewName, GetViewModel(questionSet, Document)));
}
else
{
//If no async render the entire page
CheckAnswer(questionSet);
return(View("QuestionSet", GetViewModel(questionSet, Document)));
}
}
/// <summary>
/// Gets next question
/// </summary>
public ActionResult GetNextQuestion(QuestionSetViewModel questionSet, bool isAjax = false)
{
if (isAjax)
{
//If async only render the relevant partial
string viewName;
viewName = CheckNextQuestion(questionSet);
return(View(viewName, GetViewModel(questionSet, Document)));
}
else
{
//If no async render the entire page
string viewName;
viewName = CheckNextQuestion(questionSet);
questionSet.RequiredPartial = viewName; //Tell the main layout which partial to render (all the partials in this system take the same viewmodel)
return(View("QuestionSet", GetViewModel(questionSet, Document)));
}
}
/// <summary>
/// Works out the next question to display and returns the relevant view name.
/// </summary>
private string CheckNextQuestion(QuestionSetViewModel questionSet)
{
string viewName;
ModelState.Clear();
if (questionSet.Reply?.Correct == true && questionSet.QuestionIndex + 1 > questionSet.MaxIndex)
{
questionSet.Reply = new QuestionSetViewModel.AnswerResponse()
{
Message = Dictionary <QuizmasterDictionary>().NoMoreQuestions
};
viewName = "_questionEnd";
}
else
{
//Move to next question if answer was correct, otherwise stay on same question.
questionSet.QuestionIndex = questionSet.Reply?.Correct == true ? questionSet.QuestionIndex + 1 : questionSet.QuestionIndex;
questionSet.QuestionId = Document.ElementAt(questionSet.QuestionIndex)?.NodeDetails?.UmbracoId ?? -1;
questionSet.Answer.AnswerIndex = -1;
viewName = "_question";
}
return(viewName);
}
/// <summary>
/// Constructs a model which can be used as the input to any view in this site. The model is a combination
/// of Umbraco's render model, the code-first strongly-typed document and a custom viewmodel.
/// This model type is required for use with a CodeFirstDocumentView, which is one of two view bases included
/// in the Code-First library.
/// </summary>
private object GetViewModel(QuestionSetViewModel questionSet, QuestionSet setDoc)
{
return(new DocumentViewModel <QuestionSet, QuestionSetViewModel>(new RenderModel(setDoc.NodeDetails.PublishedContent), setDoc, questionSet));
}
