public function addQuestion($data)
{
$quizzes = Edr_Manager::get('edr_quizzes');
$question = edr_get_question();
$question->lesson_id = $data['lesson_id'];
$question->question = $data['question'];
$question->question_type = $data['question_type'];
$question->menu_order = $data['menu_order'];
$question->save();
if ('multiplechoice' == $question->question_type) {
$choices = array(array('question_id' => $question->ID, 'choice_text' => 'Choice #1', 'correct' => 1, 'menu_order' => 0), array('question_id' => $question->ID, 'choice_text' => 'Choice #2', 'correct' => 0, 'menu_order' => 1), array('question_id' => $question->ID, 'choice_text' => 'Choice #3', 'correct' => 0, 'menu_order' => 2));
foreach ($choices as $choice) {
$quizzes->add_choice($choice);
}
}
return $question->ID;
}
/**
* AJAX: process quiz question admin requests.
*/
public static function quiz_question()
{
switch ($_SERVER['REQUEST_METHOD']) {
case 'POST':
$response = array('status' => '', 'errors' => array(), 'id' => 0);
$input = json_decode(file_get_contents('php://input'));
// Input given?
if (!$input || !isset($input->lesson_id) || !is_numeric($input->lesson_id)) {
status_header(400);
exit;
}
// Verify nonce.
if (!isset($input->_wpnonce) || !wp_verify_nonce($input->_wpnonce, 'edr_quiz_' . $input->lesson_id)) {
status_header(403);
exit;
}
$post_type = get_post_type($input->lesson_id);
// Verify capabilities.
if (!current_user_can('edit_' . $post_type, $input->lesson_id)) {
exit;
}
// Process input.
$question = edr_get_question();
$question->lesson_id = $input->lesson_id;
if (isset($input->question) && !empty($input->question)) {
$question->question = apply_filters('edr_add_question_pre_question', $input->question);
} else {
$response['errors'][] = 'question';
}
if (isset($input->question_type) && !empty($input->question_type)) {
$question->question_type = $input->question_type;
} else {
$response['errors'][] = 'question_type';
}
if (isset($input->question_content)) {
$question->question_content = apply_filters('edr_add_question_pre_content', $input->question_content);
} else {
$response['errors'][] = 'question_content';
}
if (isset($input->menu_order) && is_numeric($input->menu_order)) {
$question->menu_order = $input->menu_order;
} else {
$response['errors'][] = 'order';
}
if (!count($response['errors'])) {
$question->save();
if ($question->ID && isset($input->choices) && is_array($input->choices)) {
$response['choices'] = self::save_question_choices($question->ID, $input->choices);
}
if (!get_post_meta($question->lesson_id, self::$has_quiz_meta_key, true)) {
// Set default settings for the quiz.
update_post_meta($question->lesson_id, self::$has_quiz_meta_key, 1);
update_post_meta($question->lesson_id, self::$attempts_meta_key, 1);
}
$response['status'] = 'success';
$response['id'] = $question->ID;
} else {
$response['status'] = 'error';
status_header(400);
}
echo json_encode($response);
break;
case 'PUT':
$response = array('status' => '', 'errors' => array());
$question_id = isset($_GET['id']) ? absint($_GET['id']) : 0;
$input = json_decode(file_get_contents('php://input'));
// Input given?
if (!$question_id || !$input) {
status_header(400);
exit;
}
$question = edr_get_question($question_id);
// Question found?
if (!$question->ID) {
status_header(400);
exit;
}
// Verify nonce.
if (!isset($input->_wpnonce) || !wp_verify_nonce($input->_wpnonce, 'edr_quiz_' . $question->lesson_id)) {
status_header(403);
exit;
}
$post_type = get_post_type($question->lesson_id);
// Verify capabilities.
if (!current_user_can('edit_' . $post_type, $question->lesson_id)) {
exit;
}
if (isset($input->question) && !empty($input->question)) {
$question->question = apply_filters('edr_edit_question_pre_question', $input->question);
} else {
$response['errors'][] = 'question';
}
if (isset($input->question_content)) {
$question->question_content = apply_filters('edr_edit_question_pre_content', $input->question_content);
} else {
$response['errors'][] = 'question_content';
}
if (!count($response['errors'])) {
$question->save();
if (isset($input->choices) && is_array($input->choices)) {
$response['choices'] = self::save_question_choices($question->ID, $input->choices);
}
$response['status'] = 'success';
} else {
$response['status'] = 'error';
status_header(400);
}
echo json_encode($response);
break;
case 'DELETE':
$response = array('status' => '');
$question_id = isset($_GET['id']) ? absint($_GET['id']) : 0;
// Input given?
if (!$question_id) {
status_header(400);
exit;
}
$question = edr_get_question($question_id);
// Question found?
if (!$question->ID) {
status_header(400);
exit;
}
// Verify nonce.
$input = json_decode(file_get_contents('php://input'));
if (!isset($input->_wpnonce) || !wp_verify_nonce($input->_wpnonce, 'edr_quiz_' . $question->lesson_id)) {
status_header(403);
exit;
}
$post_type = get_post_type($question->lesson_id);
// Verify capabilities.
if (!current_user_can('edit_' . $post_type, $question->lesson_id)) {
exit;
}
if ($question->ID) {
$quizzes = Edr_Manager::get('edr_quizzes');
// First, delete question choices.
$choices_deleted = true;
if ('multiplechoice' == $question->question_type) {
$choices_deleted = $quizzes->delete_choices($question->ID);
}
if (false !== $choices_deleted) {
$response['status'] = $question->delete() ? 'success' : 'error';
}
}
echo json_encode($response);
break;
}
exit;
}
