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
|
<?php
/**
*
* @addtogroup SpecialPage
*/
/**
* A special page listing redirects to redirecting page.
* The software will automatically not follow double redirects, to prevent loops.
* @addtogroup SpecialPage
*/
class DoubleRedirectsPage extends PageQueryPage {
function getName() {
return 'DoubleRedirects';
}
function isExpensive( ) { return true; }
function isSyndicated() { return false; }
function getPageHeader( ) {
return wfMsgExt( 'doubleredirectstext', array( 'parse' ) );
}
function getSQLText( &$dbr, $namespace = null, $title = null ) {
list( $page, $redirect ) = $dbr->tableNamesN( 'page', 'redirect' );
$limitToTitle = !( $namespace === null && $title === null );
$sql = $limitToTitle ? "SELECT" : "SELECT 'DoubleRedirects' as type," ;
$sql .=
" pa.page_namespace as namespace, pa.page_title as title," .
" pb.page_namespace as nsb, pb.page_title as tb," .
" pc.page_namespace as nsc, pc.page_title as tc" .
" FROM $redirect AS ra, $redirect AS rb, $page AS pa, $page AS pb, $page AS pc" .
" WHERE ra.rd_from=pa.page_id" .
" AND ra.rd_namespace=pb.page_namespace" .
" AND ra.rd_title=pb.page_title" .
" AND rb.rd_from=pb.page_id" .
" AND rb.rd_namespace=pc.page_namespace" .
" AND rb.rd_title=pc.page_title";
if( $limitToTitle ) {
$encTitle = $dbr->addQuotes( $title );
$sql .= " AND pa.page_namespace=$namespace" .
" AND pa.page_title=$encTitle";
}
return $sql;
}
function getSQL() {
$dbr = wfGetDB( DB_SLAVE );
return $this->getSQLText( $dbr );
}
function getOrder() {
return '';
}
function formatResult( $skin, $result ) {
global $wgContLang;
$fname = 'DoubleRedirectsPage::formatResult';
$titleA = Title::makeTitle( $result->namespace, $result->title );
if ( $result && !isset( $result->nsb ) ) {
$dbr = wfGetDB( DB_SLAVE );
$sql = $this->getSQLText( $dbr, $result->namespace, $result->title );
$res = $dbr->query( $sql, $fname );
if ( $res ) {
$result = $dbr->fetchObject( $res );
$dbr->freeResult( $res );
}
}
if ( !$result ) {
return '<s>' . $skin->makeLinkObj( $titleA, '', 'redirect=no' ) . '</s>';
}
$titleB = Title::makeTitle( $result->nsb, $result->tb );
$titleC = Title::makeTitle( $result->nsc, $result->tc );
$linkA = $skin->makeKnownLinkObj( $titleA, '', 'redirect=no' );
$edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no');
$linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' );
$linkC = $skin->makeKnownLinkObj( $titleC );
$arr = $wgContLang->getArrow() . $wgContLang->getDirMark();
return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
}
}
/**
* constructor
*/
function wfSpecialDoubleRedirects() {
list( $limit, $offset ) = wfCheckLimits();
$sdr = new DoubleRedirectsPage();
return $sdr->doQuery( $offset, $limit );
}
|
