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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\v320;

class
remove_outdated_media extends \phpbb\db\migration\migration
{
   
// Following constants were deprecated in 3.2
    // and moved from constants.php to compatibility_globals.php,
    // thus define them as class constants
   
const ATTACHMENT_CATEGORY_WM = 2;
    const
ATTACHMENT_CATEGORY_RM = 3;
    const
ATTACHMENT_CATEGORY_QUICKTIME = 6;

    protected
$cat_id = array(
           
self::ATTACHMENT_CATEGORY_WM,
           
self::ATTACHMENT_CATEGORY_RM,
           
self::ATTACHMENT_CATEGORY_QUICKTIME,
        );

    static public function
depends_on()
    {
        return array(
           
'\phpbb\db\migration\data\v320\dev',
        );
    }

    public function
update_data()
    {
        return array(
            array(
'custom', array(array($this, 'change_extension_group'))),
        );
    }

    public function
change_extension_group()
    {
       
// select group ids of outdated media
       
$sql = 'SELECT group_id
            FROM '
. EXTENSION_GROUPS_TABLE . '
            WHERE '
. $this->db->sql_in_set('cat_id', $this->cat_id);
       
$result = $this->db->sql_query($sql);

       
$group_ids = array();
        while (
$group_id = (int) $this->db->sql_fetchfield('group_id'))
        {
           
$group_ids[] = $group_id;
        }
       
$this->db->sql_freeresult($result);

       
// nothing to do, admin has removed all the outdated media extension groups
       
if (empty($group_ids))
        {
            return
true;
        }

       
// get the group id of downloadable files
       
$sql = 'SELECT group_id
            FROM '
. EXTENSION_GROUPS_TABLE . "
            WHERE group_name = 'DOWNLOADABLE_FILES'"
;
       
$result = $this->db->sql_query($sql);
       
$download_id = (int) $this->db->sql_fetchfield('group_id');
       
$this->db->sql_freeresult($result);

        if (empty(
$download_id))
        {
           
$sql = 'UPDATE ' . EXTENSIONS_TABLE . '
                SET group_id = 0
                WHERE '
. $this->db->sql_in_set('group_id', $group_ids);
        }
        else
        {
           
// move outdated media extensions to downloadable files
           
$sql = 'UPDATE ' . EXTENSIONS_TABLE . "
                SET group_id =
$download_id" . '
                WHERE '
. $this->db->sql_in_set('group_id', $group_ids);
        }

       
$this->db->sql_query($sql);

       
// delete the now empty, outdated media extension groups
       
$sql = 'DELETE FROM ' . EXTENSION_GROUPS_TABLE . '
            WHERE '
. $this->db->sql_in_set('group_id', $group_ids);
       
$this->db->sql_query($sql);
    }
}