<?php
    class GroupStrings_ControllerPublic_GroupStrings extends XFCP_GroupStrings_ControllerPublic_GroupStrings
    {
        $db = XenForo_Application::get('db');
        $groups = $db->fetchAll("SELECT * FROM `xf_user_group` WHERE `strings`!=''");
        $match = 0;
        foreach ($groups as $group)
        {
            $strings = str_replace(" ", "", $group['strings']);
            if (stristr(',', $strings))
            {
                $strings = explode(",", $strings);
                foreach ($strings as $string)
                {
                    if (strlen($data['email']) == (strlen($string) && strripos($data['email'], $string)))
                    {
                        $match = $group['user_group_id'];
                    }
                }
            }
            if (stristr($data['email'], $strings))
            {
                $match = $group['user_group_id'];
            }
        }
        if ($match == 0)
        {
            $writer->set('user_group_id', XenForo_Model_User::$defaultRegisteredGroupId);
        }
        else
        {
            $writer->set('user_group_id', $match);
        }
    }
?>