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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
<?php
/**
* Implements Special:DoubleRedirects
*
* 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
* @ingroup SpecialPage
*/
/**
* A special page listing redirects to redirecting page.
* The software will automatically not follow double redirects, to prevent loops.
*
* @ingroup SpecialPage
*/
class DoubleRedirectsPage extends QueryPage {
function __construct( $name = 'DoubleRedirects' ) {
parent::__construct( $name );
}
function isExpensive() {
return true;
}
function isSyndicated() {
return false;
}
function sortDescending() {
return false;
}
function getPageHeader() {
return $this->msg( 'doubleredirectstext' )->parseAsBlock();
}
function reallyGetQueryInfo( $namespace = null, $title = null ) {
$limitToTitle = !( $namespace === null && $title === null );
$dbr = wfGetDB( DB_SLAVE );
$retval = array(
'tables' => array(
'ra' => 'redirect',
'rb' => 'redirect',
'pa' => 'page',
'pb' => 'page'
),
'fields' => array(
'namespace' => 'pa.page_namespace',
'title' => 'pa.page_title',
'value' => 'pa.page_title',
'nsb' => 'pb.page_namespace',
'tb' => 'pb.page_title',
// Select fields from redirect instead of page. Because there may
// not actually be a page table row for this target (e.g. for interwiki redirects)
'nsc' => 'rb.rd_namespace',
'tc' => 'rb.rd_title',
'iwc' => 'rb.rd_interwiki',
),
'conds' => array(
'ra.rd_from = pa.page_id',
// Filter out redirects where the target goes interwiki (bug 40353).
// This isn't an optimization, it is required for correct results,
// otherwise a non-double redirect like Bar -> w:Foo will show up
// like "Bar -> Foo -> w:Foo".
// Need to check both NULL and "" for some reason,
// apparently either can be stored for non-iw entries.
'ra.rd_interwiki IS NULL OR ra.rd_interwiki = ' . $dbr->addQuotes( '' ),
'pb.page_namespace = ra.rd_namespace',
'pb.page_title = ra.rd_title',
'rb.rd_from = pb.page_id',
)
);
if ( $limitToTitle ) {
$retval['conds']['pa.page_namespace'] = $namespace;
$retval['conds']['pa.page_title'] = $title;
}
return $retval;
}
function getQueryInfo() {
return $this->reallyGetQueryInfo();
}
function getOrderFields() {
return array( 'ra.rd_namespace', 'ra.rd_title' );
}
/**
* @param Skin $skin
* @param object $result Result row
* @return string
*/
function formatResult( $skin, $result ) {
$titleA = Title::makeTitle( $result->namespace, $result->title );
// If only titleA is in the query, it means this came from
// querycache (which only saves 3 columns).
// That does save the bulk of the query cost, but now we need to
// get a little more detail about each individual entry quickly
// using the filter of reallyGetQueryInfo.
if ( $result && !isset( $result->nsb ) ) {
$dbr = wfGetDB( DB_SLAVE );
$qi = $this->reallyGetQueryInfo(
$result->namespace,
$result->title
);
$res = $dbr->select(
$qi['tables'],
$qi['fields'],
$qi['conds'],
__METHOD__
);
if ( $res ) {
$result = $dbr->fetchObject( $res );
}
}
if ( !$result ) {
return '<del>' . Linker::link( $titleA, null, array(), array( 'redirect' => 'no' ) ) . '</del>';
}
$titleB = Title::makeTitle( $result->nsb, $result->tb );
$titleC = Title::makeTitle( $result->nsc, $result->tc, '', $result->iwc );
$linkA = Linker::linkKnown(
$titleA,
null,
array(),
array( 'redirect' => 'no' )
);
$edit = Linker::linkKnown(
$titleA,
$this->msg( 'parentheses', $this->msg( 'editlink' )->text() )->escaped(),
array(),
array(
'redirect' => 'no',
'action' => 'edit'
)
);
$linkB = Linker::linkKnown(
$titleB,
null,
array(),
array( 'redirect' => 'no' )
);
$linkC = Linker::linkKnown( $titleC );
$lang = $this->getLanguage();
$arr = $lang->getArrow() . $lang->getDirMark();
return ( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
}
protected function getGroupName() {
return 'maintenance';
}
}
|
