1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
<?php
/**
* Updater for link tracking tables after a page edit.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Update object handling the cleanup of links tables after a page was deleted.
**/
class LinksDeletionUpdate extends SqlDataUpdate {
/** @var WikiPage The WikiPage that was deleted */
protected $mPage;
/**
* Constructor
*
* @param WikiPage $page Page we are updating
* @throws MWException
*/
function __construct( WikiPage $page ) {
parent::__construct( false ); // no implicit transaction
$this->mPage = $page;
if ( !$page->exists() ) {
throw new MWException( "Page ID not known, perhaps the page doesn't exist?" );
}
}
/**
* Do some database updates after deletion
*/
public function doUpdate() {
$title = $this->mPage->getTitle();
$id = $this->mPage->getId();
# Delete restrictions for it
$this->mDb->delete( 'page_restrictions', array( 'pr_page' => $id ), __METHOD__ );
# Fix category table counts
$cats = array();
$res = $this->mDb->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
foreach ( $res as $row ) {
$cats[] = $row->cl_to;
}
$this->mPage->updateCategoryCounts( array(), $cats );
# If using cascading deletes, we can skip some explicit deletes
if ( !$this->mDb->cascadingDeletes() ) {
# Delete outgoing links
$this->mDb->delete( 'pagelinks', array( 'pl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'imagelinks', array( 'il_from' => $id ), __METHOD__ );
$this->mDb->delete( 'categorylinks', array( 'cl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'templatelinks', array( 'tl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'externallinks', array( 'el_from' => $id ), __METHOD__ );
$this->mDb->delete( 'langlinks', array( 'll_from' => $id ), __METHOD__ );
$this->mDb->delete( 'iwlinks', array( 'iwl_from' => $id ), __METHOD__ );
$this->mDb->delete( 'redirect', array( 'rd_from' => $id ), __METHOD__ );
$this->mDb->delete( 'page_props', array( 'pp_page' => $id ), __METHOD__ );
}
# If using cleanup triggers, we can skip some manual deletes
if ( !$this->mDb->cleanupTriggers() ) {
# Find recentchanges entries to clean up...
$rcIdsForTitle = $this->mDb->selectFieldValues( 'recentchanges',
'rc_id',
array(
'rc_type != ' . RC_LOG,
'rc_namespace' => $title->getNamespace(),
'rc_title' => $title->getDBkey()
),
__METHOD__
);
$rcIdsForPage = $this->mDb->selectFieldValues( 'recentchanges',
'rc_id',
array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ),
__METHOD__
);
# T98706: delete PK to avoid lock contention with RC delete log insertions
$rcIds = array_merge( $rcIdsForTitle, $rcIdsForPage );
if ( $rcIds ) {
$this->mDb->delete( 'recentchanges', array( 'rc_id' => $rcIds ), __METHOD__ );
}
}
}
}
|
