17f89f9c4a3a51ff0a978297b27f79a7a2ab8793
[lhc/web/wiklou.git] / includes / specials / SpecialBrokenRedirects.php
1 <?php
2 /**
3 * Implements Special:Brokenredirects
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
19 *
20 * @file
21 * @ingroup SpecialPage
22 */
23
24 use Wikimedia\Rdbms\IResultWrapper;
25 use Wikimedia\Rdbms\IDatabase;
26
27 /**
28 * A special page listing redirects to non existent page. Those should be
29 * fixed to point to an existing page.
30 *
31 * @ingroup SpecialPage
32 */
33 class BrokenRedirectsPage extends QueryPage {
34 function __construct( $name = 'BrokenRedirects' ) {
35 parent::__construct( $name );
36 }
37
38 public function isExpensive() {
39 return true;
40 }
41
42 function isSyndicated() {
43 return false;
44 }
45
46 function sortDescending() {
47 return false;
48 }
49
50 function getPageHeader() {
51 return $this->msg( 'brokenredirectstext' )->parseAsBlock();
52 }
53
54 public function getQueryInfo() {
55 $dbr = wfGetDB( DB_REPLICA );
56
57 return [
58 'tables' => [
59 'redirect',
60 'p1' => 'page',
61 'p2' => 'page',
62 ],
63 'fields' => [
64 'namespace' => 'p1.page_namespace',
65 'title' => 'p1.page_title',
66 'value' => 'p1.page_title',
67 'rd_namespace',
68 'rd_title',
69 'rd_fragment',
70 ],
71 'conds' => [
72 // Exclude pages that don't exist locally as wiki pages,
73 // but aren't "broken" either.
74 // Special pages and interwiki links
75 'rd_namespace >= 0',
76 'rd_interwiki IS NULL OR rd_interwiki = ' . $dbr->addQuotes( '' ),
77 'p2.page_namespace IS NULL',
78 ],
79 'join_conds' => [
80 'p1' => [ 'JOIN', [
81 'rd_from=p1.page_id',
82 ] ],
83 'p2' => [ 'LEFT JOIN', [
84 'rd_namespace=p2.page_namespace',
85 'rd_title=p2.page_title'
86 ] ],
87 ],
88 ];
89 }
90
91 /**
92 * @return array
93 */
94 function getOrderFields() {
95 return [ 'rd_namespace', 'rd_title', 'rd_from' ];
96 }
97
98 /**
99 * @param Skin $skin
100 * @param object $result Result row
101 * @return string
102 */
103 function formatResult( $skin, $result ) {
104 $fromObj = Title::makeTitle( $result->namespace, $result->title );
105 if ( isset( $result->rd_title ) ) {
106 $toObj = Title::makeTitle( $result->rd_namespace, $result->rd_title, $result->rd_fragment );
107 } else {
108 $blinks = $fromObj->getBrokenLinksFrom(); # TODO: check for redirect, not for links
109 if ( $blinks ) {
110 $toObj = $blinks[0];
111 } else {
112 $toObj = false;
113 }
114 }
115
116 $linkRenderer = $this->getLinkRenderer();
117 // $toObj may very easily be false if the $result list is cached
118 if ( !is_object( $toObj ) ) {
119 return '<del>' . $linkRenderer->makeLink( $fromObj ) . '</del>';
120 }
121
122 $from = $linkRenderer->makeKnownLink(
123 $fromObj,
124 null,
125 [],
126 [ 'redirect' => 'no' ]
127 );
128 $links = [];
129 // if the page is editable, add an edit link
130 if (
131 // check user permissions
132 $this->getUser()->isAllowed( 'edit' ) &&
133 // check, if the content model is editable through action=edit
134 ContentHandler::getForTitle( $fromObj )->supportsDirectEditing()
135 ) {
136 $links[] = $linkRenderer->makeKnownLink(
137 $fromObj,
138 $this->msg( 'brokenredirects-edit' )->text(),
139 [],
140 [ 'action' => 'edit' ]
141 );
142 }
143 $to = $linkRenderer->makeBrokenLink( $toObj, $toObj->getFullText() );
144 $arr = $this->getLanguage()->getArrow();
145
146 $out = $from . $this->msg( 'word-separator' )->escaped();
147
148 if ( $this->getUser()->isAllowed( 'delete' ) ) {
149 $links[] = $linkRenderer->makeKnownLink(
150 $fromObj,
151 $this->msg( 'brokenredirects-delete' )->text(),
152 [],
153 [ 'action' => 'delete' ]
154 );
155 }
156
157 if ( $links ) {
158 $out .= $this->msg( 'parentheses' )->rawParams( $this->getLanguage()
159 ->pipeList( $links ) )->escaped();
160 }
161 $out .= " {$arr} {$to}";
162
163 return $out;
164 }
165
166 public function execute( $par ) {
167 $this->addHelpLink( 'Help:Redirects' );
168 parent::execute( $par );
169 }
170
171 /**
172 * Cache page content model for performance
173 *
174 * @param IDatabase $db
175 * @param IResultWrapper $res
176 */
177 function preprocessResults( $db, $res ) {
178 $this->executeLBFromResultWrapper( $res );
179 }
180
181 protected function getGroupName() {
182 return 'maintenance';
183 }
184 }