/**
* Handle a user wanting to go to the previous question or jump a question without saving the question details.
*/
function WPCW_AJAX_units_handleQuizJumpQuestion()
{
// Security check
if (!wp_verify_nonce(WPCW_arrays_getValue($_POST, 'progress_nonce'), 'wpcw-progress-nonce')) {
die(__('Security check failed!', 'wp_courseware'));
}
// Get unit and quiz ID
$unitID = intval(WPCW_arrays_getValue($_POST, 'unitid'));
$quizID = intval(WPCW_arrays_getValue($_POST, 'quizid'));
$jumpMode = 'previous';
$msgPrefix = __('Error - could not load the previous question.', 'wp_courseware') . ' ';
// We're skipping ahead.
if ('next' == WPCW_arrays_getValue($_POST, 'qu_direction')) {
$jumpMode = 'next';
$msgPrefix = __('Error - could not load the next question.', 'wp_courseware') . ' ';
}
// Get the post object for this quiz item.
$post = get_post($unitID);
if (!$post) {
echo WPCW_UnitFrontend::message_createMessage_error($msgPrefix . __('Could not find training unit.', 'wp_courseware'));
die;
}
// Initalise the unit details
$fe = new WPCW_UnitFrontend($post);
// #### Get associated data for this unit. No course/module data, then it's not a unit
if (!$fe->check_unit_doesUnitHaveParentData()) {
echo WPCW_UnitFrontend::message_createMessage_error($msgPrefix . __('Could not find course details for unit.', 'wp_courseware'));
die;
}
// #### User not allowed access to content
if (!$fe->check_user_canUserAccessCourse()) {
echo $fe->message_user_cannotAccessCourse();
die;
}
// #### Check that the quiz is valid and belongs to this unit
if (!$fe->check_quizzes_isQuizValidForUnit($quizID)) {
echo WPCW_UnitFrontend::message_createMessage_error($msgPrefix . __('Quiz data does not match quiz for this unit.', 'wp_courseware'));
die;
}
$canContinue = false;
// If we're paging, then do what we need next.
if ($fe->check_paging_areWePagingQuestions()) {
$fe->fetch_paging_getQuestion_moveQuestionMarker($jumpMode);
}
echo $fe->render_detailsForUnit(false, true);
die;
}
