public static async Task <RootObject> GetQuizzesFromExternal(OpentdbParams opentdbParams)
{
string uriString = "https://opentdb.com/api.php?amount=" + opentdbParams.Amount + opentdbParams.Category + opentdbParams.Difficulty + "&type=multiple";
Uri opentdbUri = new Uri(uriString);
var result = await httpClient.GetAsync(opentdbUri);
string json = "";
if (result.IsSuccessStatusCode)
{
json = await result.Content.ReadAsStringAsync();
}
RootObject rootObject = JsonConvert.DeserializeObject <RootObject>(json);
return(rootObject);
}
public async void ClickedNext()
{
OpentdbParams opentdbParams = new OpentdbParams();
if (SelectedCategoryIndex > 0)
{
opentdbParams.Category = "&category=" + (SelectedCategoryIndex + 8);
}
else
{
opentdbParams.Category = "";
}
if (SelectedDifficulty == null || SelectedDifficulty.Equals("All difficulties", StringComparison.Ordinal))
{
opentdbParams.Difficulty = "";
}
else
{
opentdbParams.Difficulty = "&difficulty=" + SelectedDifficulty.ToLower(new CultureInfo("en-Us", false));
}
if (SelectedAmount == 0)
{
opentdbParams.Amount = "&amount=3";
}
else
{
opentdbParams.Amount = "&amount=" + selectedAmount;
}
RootObject rootObject = await ExternalRequest.GetQuizzesFromExternal(opentdbParams).ConfigureAwait(true);
if (rootObject == null)
{
DisplayErrorMessageAsync("Didn't find enough quizzes to match your request!");
return;
}
Quiz quiz = new Quiz();
quiz.QuizName = SelectedCategoryItem + " Quiz";
quiz.QuizCategory = SelectedCategoryItem;
foreach (var opentdbQuestion in rootObject.results)
{
Question question = new Question();
question.QuestionText = System.Web.HttpUtility.HtmlDecode(opentdbQuestion.question);
question.CorrectAnswerNumber = 1;
question.AnswersList.Add(new Answer(System.Web.HttpUtility.HtmlDecode(opentdbQuestion.correct_answer), question, 1, 0));
int i = 2;
foreach (var answer in opentdbQuestion.incorrect_answers)
{
question.AnswersList.Add(new Answer(System.Web.HttpUtility.HtmlDecode(answer), question, i++, 0));
}
quiz.QuestionList.Add(question);
}
QuizCompletionParams q = new QuizCompletionParams();
q.Quiz = quiz;
q.QuestionToHandle = 1;
if (quiz.QuestionList.Count == 0)
{
DisplayErrorMessageAsync("Didn't find enough quizzes to match your request!");
return;
}
foreach (var question in quiz.QuestionList)
{
ScrambleAnswers(question);
}
NavigationService.Navigate(typeof(TakeQuiz), q);
}
