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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\v30x;
class release_3_0_11_rc1 extends \phpbb\db\migration\migration
{
    public function effectively_installed()
    {
        return phpbb_version_compare($this->config['version'], '3.0.11-RC1', '>=');
    }
    static public function depends_on()
    {
        return array('\phpbb\db\migration\data\v30x\release_3_0_10');
    }
    public function update_data()
    {
        return array(
            array('custom', array(array(&$this, 'cleanup_deactivated_styles'))),
            array('custom', array(array(&$this, 'delete_orphan_private_messages'))),
            array('config.update', array('version', '3.0.11-RC1')),
        );
    }
    public function cleanup_deactivated_styles()
    {
        // Updates users having current style a deactivated one
        $sql = 'SELECT style_id
            FROM ' . STYLES_TABLE . '
            WHERE style_active = 0';
        $result = $this->sql_query($sql);
        $deactivated_style_ids = array();
        while ($style_id = $this->db->sql_fetchfield('style_id', false, $result))
        {
            $deactivated_style_ids[] = (int) $style_id;
        }
        $this->db->sql_freeresult($result);
        if (!empty($deactivated_style_ids))
        {
            $sql = 'UPDATE ' . USERS_TABLE . '
                SET user_style = ' . (int) $this->config['default_style'] .'
                WHERE ' . $this->db->sql_in_set('user_style', $deactivated_style_ids);
            $this->sql_query($sql);
        }
    }
    public function delete_orphan_private_messages()
    {
        // Delete orphan private messages
        $batch_size = 500;
        $sql_array = array(
            'SELECT'    => 'p.msg_id',
            'FROM'        => array(
                PRIVMSGS_TABLE    => 'p',
            ),
            'LEFT_JOIN'    => array(
                array(
                    'FROM'    => array(PRIVMSGS_TO_TABLE => 't'),
                    'ON'    => 'p.msg_id = t.msg_id',
                ),
            ),
            'WHERE'        => 't.user_id IS NULL',
        );
        $sql = $this->db->sql_build_query('SELECT', $sql_array);
        $result = $this->db->sql_query_limit($sql, $batch_size);
        $delete_pms = array();
        while ($row = $this->db->sql_fetchrow($result))
        {
            $delete_pms[] = (int) $row['msg_id'];
        }
        $this->db->sql_freeresult($result);
        if (!empty($delete_pms))
        {
            $sql = 'DELETE FROM ' . PRIVMSGS_TABLE . '
                WHERE ' . $this->db->sql_in_set('msg_id', $delete_pms);
            $this->sql_query($sql);
            // Return false to have the Migrator call this function again
            return false;
        }
    }
}