Method getGroups

/**
 * Method to get the field option groups.
 *
 * @return  array  The field option objects as a nested array in groups.
 *
 * @since   1.7.0
 * @throws  \UnexpectedValueException
 */
protected function getGroups()
{
    $clientId = (string) $this->element['clientid'];
    $accessType = (string) $this->element['accesstype'];
    $showAll = (string) $this->element['showAll'] === 'true';
    $db = Factory::getDbo();
    $query = $db->getQuery(true)->select([$db->quoteName('id'), $db->quoteName('menutype', 'value'), $db->quoteName('title', 'text'), $db->quoteName('client_id')])->from($db->quoteName('#__menu_types'))->order([$db->quoteName('client_id'), $db->quoteName('title')]);
    if (\strlen($clientId)) {
        $client = (int) $clientId;
        $query->where($db->quoteName('client_id') . ' = :client')->bind(':client', $client, ParameterType::INTEGER);
    }
    $menus = $db->setQuery($query)->loadObjectList();
    if ($accessType) {
        $user = Factory::getUser();
        foreach ($menus as $key => $menu) {
            switch ($accessType) {
                case 'create':
                case 'manage':
                    if (!$user->authorise('core.' . $accessType, 'com_menus.menu.' . (int) $menu->id)) {
                        unset($menus[$key]);
                    }
                    break;
                // Editing a menu item is a bit tricky, we have to check the current menutype for core.edit and all others for core.create
                case 'edit':
                    $check = $this->value == $menu->value ? 'edit' : 'create';
                    if (!$user->authorise('core.' . $check, 'com_menus.menu.' . (int) $menu->id)) {
                        unset($menus[$key]);
                    }
                    break;
            }
        }
    }
    $opts = array();
    // Protected menutypes can be shown if requested
    if ($clientId == 1 && $showAll) {
        $opts[] = (object) array('value' => 'main', 'text' => Text::_('COM_MENUS_MENU_TYPE_PROTECTED_MAIN_LABEL'), 'client_id' => 1);
    }
    $options = array_merge($opts, $menus);
    $groups = array();
    if (\strlen($clientId)) {
        $groups[0] = $options;
    } else {
        foreach ($options as $option) {
            // If client id is not specified we group the items.
            $label = $option->client_id == 1 ? Text::_('JADMINISTRATOR') : Text::_('JSITE');
            $groups[$label][] = $option;
        }
    }
    // Merge any additional options in the XML definition.
    return array_merge(parent::getGroups(), $groups);
}