<?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\attachment;
use phpbb\db\driver\driver_interface;
/**
* Attachment resync class
*/
class resync
{
/** @var driver_interface */
protected $db;
/** @var string Attachment table SQL ID */
private $attach_sql_id;
/** @var string Resync table SQL ID */
private $resync_sql_id;
/** @var string Resync SQL table */
private $resync_table;
/** @var string SQL where statement */
private $sql_where;
/**
* Constructor for attachment resync class
*
* @param driver_interface $db Database driver
*/
public function __construct(driver_interface $db)
{
$this->db = $db;
}
/**
* Set type constraints for attachment resync
*
* @param string $type Type of resync; can be: message|post|topic
*/
protected function set_type_constraints($type)
{
switch ($type)
{
case 'message':
$this->attach_sql_id = 'post_msg_id';
$this->sql_where = ' AND in_message = 1
AND is_orphan = 0';
$this->resync_table = PRIVMSGS_TABLE;
$this->resync_sql_id = 'msg_id';
break;
case 'post':
$this->attach_sql_id = 'post_msg_id';
$this->sql_where = ' AND in_message = 0
AND is_orphan = 0';
$this->resync_table = POSTS_TABLE;
$this->resync_sql_id = 'post_id';
break;
case 'topic':
$this->attach_sql_id = 'topic_id';
$this->sql_where = ' AND is_orphan = 0';
$this->resync_table = TOPICS_TABLE;
$this->resync_sql_id = 'topic_id';
break;
}
}
/**
* Resync specified type
*
* @param string $type Type of resync
* @param array $ids IDs to resync
*/
public function resync($type, $ids)
{
if (empty($type) || !is_array($ids) || !count($ids) || !in_array($type, array('post', 'topic', 'message')))
{
return;
}
$this->set_type_constraints($type);
// Just check which elements are still having an assigned attachment
// not orphaned by querying the attachments table
$sql = 'SELECT ' . $this->attach_sql_id . '
FROM ' . ATTACHMENTS_TABLE . '
WHERE ' . $this->db->sql_in_set($this->attach_sql_id, $ids)
. $this->sql_where;
$result = $this->db->sql_query($sql);
$remaining_ids = array();
while ($row = $this->db->sql_fetchrow($result))
{
$remaining_ids[] = $row[$this->attach_sql_id];
}
$this->db->sql_freeresult($result);
// Now only unset those ids remaining
$ids = array_diff($ids, $remaining_ids);
if (count($ids))
{
$sql = 'UPDATE ' . $this->resync_table . '
SET ' . $type . '_attachment = 0
WHERE ' . $this->db->sql_in_set($this->resync_sql_id, $ids);
$this->db->sql_query($sql);
}
}
}