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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\db\migration\data\v33x;
class remove_orphaned_roles extends \phpbb\db\migration\migration
{
    static public function depends_on()
    {
        return ['\phpbb\db\migration\data\v33x\v335'];
    }
    public function update_data()
    {
        return [
            ['custom', [[$this, 'acl_remove_orphaned_roles']]],
        ];
    }
    public function acl_remove_orphaned_roles()
    {
        $role_ids = [];
        $auth_role_ids = [];
        $sql = 'SELECT auth_role_id
            FROM ' . ACL_GROUPS_TABLE . '
            WHERE auth_role_id <> 0
                AND forum_id = 0';
        $result = $this->db->sql_query($sql);
        while ($row = $this->db->sql_fetchrow($result))
        {
            $auth_role_ids[] = $row['auth_role_id'];
        }
        $this->db->sql_freeresult($result);
        if (count($auth_role_ids))
        {
            $sql = 'SELECT role_id
                FROM ' . ACL_ROLES_TABLE . '
                WHERE ' . $this->db->sql_in_set('role_id', $auth_role_ids);
            $result = $this->db->sql_query($sql);
            while ($row = $this->db->sql_fetchrow($result))
            {
                $role_ids[] = $row['role_id'];
            }
            $this->db->sql_freeresult($result);
        }
        $non_existent_role_ids = array_diff($auth_role_ids, $role_ids);
        // Nothing to do, there are no non-existent roles assigned to groups
        if (empty($non_existent_role_ids))
        {
            return true;
        }
        // Remove assigned non-existent roles from users and groups
        $sql = 'DELETE FROM ' . ACL_USERS_TABLE . '
            WHERE ' . $this->db->sql_in_set('auth_role_id', $non_existent_role_ids);
        $this->db->sql_query($sql);
        $sql = 'DELETE FROM ' . ACL_GROUPS_TABLE . '
            WHERE ' . $this->db->sql_in_set('auth_role_id', $non_existent_role_ids);
        $this->db->sql_query($sql);
        $auth = new \phpbb\auth\auth();
        $auth->acl_clear_prefetch();
        return true;
    }
}