Chapter3.java

private static void main_chapter3() {
        
    //0- access token, from the previous chapter
    String token = getAccessToken();

    //1- create a new form
    String formId = createNewForm(token);

    //2- transform it into a quiz
    transformInQuiz(formId,token);

    //3- add questions
    addItemToQuiz(
            "Which of these singers was not a member of Destiny's Child?",
            Arrays.asList("Kelly Rowland", "Beyoncè", "Rihanna", "Michelle Williams"),
            "Rihanna",
            formId,
            token
    );

}

private static String createNewForm(String token) throws IOException {
    Form form = new Form();
    form.setInfo(new Info());
    form.getInfo().setTitle("New Form Quiz Created from Java");

    form = formsService.forms().create(form)
            .setAccessToken(token)
            .execute();
    return form.getFormId();
}


private static void transformInQuiz(String formId, String token) throws IOException {
    BatchUpdateFormRequest batchRequest = new BatchUpdateFormRequest();
    Request request = new Request();
    request.setUpdateSettings(new UpdateSettingsRequest());
    request.getUpdateSettings().setSettings(new FormSettings());
    request.getUpdateSettings().getSettings().setQuizSettings(new QuizSettings());
    request.getUpdateSettings().getSettings().getQuizSettings().setIsQuiz(true);
    request.getUpdateSettings().setUpdateMask("quizSettings.isQuiz");
    batchRequest.setRequests(Collections.singletonList(request));
    formsService.forms().batchUpdate(formId, batchRequest)
            .setAccessToken(token).execute();
}

private static void addItemToQuiz(
        String questionText,
        List<String> answers,
        String correctAnswer,
        String formId, String token) throws IOException {

    BatchUpdateFormRequest batchRequest = new BatchUpdateFormRequest();
    Request request = new Request();

    Item item = new Item();
    item.setTitle(questionText);

    item.setQuestionItem(new QuestionItem());
    Question question = new Question();
    question.setRequired(true);
    question.setChoiceQuestion(new ChoiceQuestion());
    question.getChoiceQuestion().setType("RADIO");

    List<Option> options = new ArrayList<>();
    for (String answer : answers) {
        Option option = new Option();
        option.setValue(answer);
        options.add(option);
    }
    question.getChoiceQuestion().setOptions(options);

    Grading grading = new Grading();
    grading.setPointValue(2);
    grading.setCorrectAnswers(new CorrectAnswers());
    grading.getCorrectAnswers().setAnswers(new ArrayList<>());
    grading.getCorrectAnswers().getAnswers().add(new CorrectAnswer());
    grading.getCorrectAnswers().getAnswers().get(0).setValue(correctAnswer);
    Feedback whenRight = new Feedback();
    whenRight.setText("Yeah!");
    Feedback whenWrong = new Feedback();
    whenWrong.setText("Wrong Answer");
    grading.setWhenRight(whenRight);
    grading.setWhenWrong(whenWrong);
    question.setGrading(grading);

    item.getQuestionItem().setQuestion(question);
    request.setCreateItem(new CreateItemRequest());
    request.getCreateItem().setItem(item);
    request.getCreateItem().setLocation(new Location());
    request.getCreateItem().getLocation().setIndex(0);

    batchRequest.setRequests(Collections.singletonList(request));

    formsService.forms().batchUpdate(formId, batchRequest)
            .setAccessToken(token).execute();
}