public QuizScreenViewModel(IEventAggregator eventAggregator, int quizID, string userType, string username)
{
this.eventAggregator = eventAggregator;
this.quizID = quizID;
this.userType = userType;
this.username = username;
this.Model = new QuizScreenModel();
//gets the quiz JSON and then fills the model with the quiz's content
string JSON = QuizHandling.GetQuizJSON(this.quizID);
(Model.Questions, Model.QuestionTypes, Model.Answers, Model.TimeLeft, Model.QuizType) = QuizHandling.OpenQuiz(JSON);
//creates a string array that the user's inputs will go into
Model.UserInputs = new string[Model.Questions.Length];
this.Model.NextButtonText = "Next Question";
SetFirstQuestion();
SetTimerSettings();
}
public CreateQuizViewModel(IEventAggregator eventAggregator, string username, IWindowManager windowManager, int quizID)
{
this.eventAggregator = eventAggregator;
//subscribe to the event aggregator for sending the quiz to a class at the end
eventAggregator.Subscribe(this);
//sets everything up as it should be and assigns the default values for editing a quiz from the first question
this.windowManager = windowManager;
this.Model = new CreateQuizModel();
this.Model.Username = username;
this.Model.CurrentQuestionNumber = 0;
this.Model.NextButtonText = "Add question";
this.Model.Public = true;
// quiz ID being -1 means that it's a new quiz, if the quiz ID put into the ViewModel as a parameter isn't -1 then load the quiz contents from the server
if (quizID != -1)
{
string JSON = QuizHandling.GetQuizJSON(quizID);
//temporary to return values into
string[] questions;
int[] questionTypes;
string[] answers;
(questions, questionTypes, answers, Model.TimeAllocated, Model.QuizType) = QuizHandling.OpenQuiz(JSON);
FillModel(questions, questionTypes, answers);
SetUpQuestion();
}
else
{
//Sets the default values for quiz entry
this.Model.QuestionNumberDisplay = "Question 1/1";
this.Model.Instant = true;
this.Model.QuizType = "Instant";
//start on settings
this.Model.CurrentQuestionType = 3;
}
}
public ViewQuizViewModel(IEventAggregator eventAggregator, string username, int quizID)
{
this.eventAggregator = eventAggregator;
this.Model = new ViewQuizModel();
bool success;
//gets the quiz attempt information from the server
(Model.QuizID, Model.Username, Model.QuizType, Model.Questions, Model.Answers, Model.CorrectQuestions, success) = QuizHandling.GetQuizInformation(username, quizID);
if (success == false)
{
MessageBox.Show("Something went wrong loading the quiz. Returning to the main menu");
ChangePageEvent changePage = new ChangePageEvent();
changePage.pageName = "TeacherMainMenu";
this.eventAggregator.Publish(changePage);
}
else
{
this.Model.CurrentQuestionNumber = 0;
SetUpQuestion();
}
}
