print_error('invalidgroupnumber', 'offlinequiz');
}
if ($returnurl) {
    $returnurl = new moodle_url($returnurl);
} else {
    $returnurl = new moodle_url('/mod/offlinequiz/edit.php', array('cmid' => $cmid, 'groupnumber' => $offlinequiz->groupnumber));
}
if ($scrollpos) {
    $returnurl->param('scrollpos', $scrollpos);
}
$thispageurl->param('groupnumber', $offlinequiz->groupnumber);
$PAGE->set_url($thispageurl);
$defaultcategoryobj = question_make_default_categories($contexts->all());
$defaultcategory = $defaultcategoryobj->id . ',' . $defaultcategoryobj->contextid;
$qcobject = new question_category_object($pagevars['cpage'], $thispageurl, $contexts->having_one_edit_tab_cap('categories'), $defaultcategoryobj->id, $defaultcategory, null, $contexts->having_cap('moodle/question:add'));
$mform = new offlinequiz_add_random_form(new moodle_url('/mod/offlinequiz/addrandom.php'), array('contexts' => $contexts, 'cat' => $pagevars['cat'], 'groupnumber' => $offlinequiz->groupnumber));
if ($mform->is_cancelled()) {
    redirect($returnurl);
}
if ($data = $mform->get_data()) {
    if (!empty($data->existingcategory)) {
        list($categoryid) = explode(',', $data->category);
        $includesubcategories = !empty($data->includesubcategories);
        $returnurl->param('cat', $data->category);
    } else {
        if (!empty($data->newcategory)) {
            list($parentid, $contextid) = explode(',', $data->parent);
            $categoryid = $qcobject->add_category($data->parent, $data->name, '', true);
            $includesubcategories = 0;
            $returnurl->param('cat', $categoryid . ',' . $contextid);
        } else {
 /**
  * Return random question form.
  * @param \moodle_url $thispageurl the canonical URL of this page.
  * @param \question_edit_contexts $contexts the relevant question bank contexts.
  * @param array $pagevars the variables from {@link \question_edit_setup()}.
  * @return string HTML to output.
  */
 protected function random_question_form(\moodle_url $thispageurl, \question_edit_contexts $contexts, array $pagevars)
 {
     if (!$contexts->have_cap('moodle/question:useall')) {
         return '';
     }
     $randomform = new \offlinequiz_add_random_form(new \moodle_url('/mod/offlinequiz/addrandom.php'), array('contexts' => $contexts, 'cat' => $pagevars['cat'], 'groupnumber' => $thispageurl->get_param('groupnumber')));
     $randomform->set_data(array('category' => $pagevars['cat'], 'returnurl' => $thispageurl->out_as_local_url(true), 'randomnumber' => 1, 'cmid' => $thispageurl->param('cmid')));
     return html_writer::div($randomform->render(), 'randomquestionformforpopup');
 }