includes/specials/SpecialMostlinked.php

   1 <?php
   2 /**
   3  * Implements Special:Mostlinked
   4  *
   5  * Copyright © 2005 Ævar Arnfjörð Bjarmason, 2006 Rob Church
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
  25  * @author Rob Church <robchur@gmail.com>
  26  */
  27
  28 /**
  29  * A special page to show pages ordered by the number of pages linking to them.
  30  *
  31  * @ingroup SpecialPage
  32  */
  33 class MostlinkedPage extends QueryPage {
  34         function __construct( $name = 'Mostlinked' ) {
  35                 parent::__construct( $name );
  36         }
  37
  38         function isExpensive() {
  39                 return true;
  40         }
  41
  42         function isSyndicated() {
  43                 return false;
  44         }
  45
  46         function getQueryInfo() {
  47                 return array(
  48                         'tables' => array( 'pagelinks', 'page' ),
  49                         'fields' => array(
  50                                 'namespace' => 'pl_namespace',
  51                                 'title' => 'pl_title',
  52                                 'value' => 'COUNT(*)',
  53                                 'page_namespace'
  54                         ),
  55                         'options' => array(
  56                                 'HAVING' => 'COUNT(*) > 1',
  57                                 'GROUP BY' => array(
  58                                         'pl_namespace', 'pl_title',
  59                                         'page_namespace'
  60                                 )
  61                         ),
  62                         'join_conds' => array(
  63                                 'page' => array(
  64                                         'LEFT JOIN',
  65                                         array(
  66                                                 'page_namespace = pl_namespace',
  67                                                 'page_title = pl_title'
  68                                         )
  69                                 )
  70                         )
  71                 );
  72         }
  73
  74         /**
  75          * Pre-fill the link cache
  76          *
  77          * @param IDatabase $db
  78          * @param ResultWrapper $res
  79          */
  80         function preprocessResults( $db, $res ) {
  81                 if ( $res->numRows() > 0 ) {
  82                         $linkBatch = new LinkBatch();
  83
  84                         foreach ( $res as $row ) {
  85                                 $linkBatch->add( $row->namespace, $row->title );
  86                         }
  87
  88                         $res->seek( 0 );
  89                         $linkBatch->execute();
  90                 }
  91         }
  92
  93         /**
  94          * Make a link to "what links here" for the specified title
  95          *
  96          * @param Title $title Title being queried
  97          * @param string $caption Text to display on the link
  98          * @return string
  99          */
 100         function makeWlhLink( $title, $caption ) {
 101                 $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedDBkey() );
 102
 103                 return Linker::linkKnown( $wlh, $caption );
 104         }
 105
 106         /**
 107          * Make links to the page corresponding to the item,
 108          * and the "what links here" page for it
 109          *
 110          * @param Skin $skin Skin to be used
 111          * @param object $result Result row
 112          * @return string
 113          */
 114         function formatResult( $skin, $result ) {
 115                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
 116                 if ( !$title ) {
 117                         return Html::element(
 118                                 'span',
 119                                 array( 'class' => 'mw-invalidtitle' ),
 120                                 Linker::getInvalidTitleDescription(
 121                                         $this->getContext(),
 122                                         $result->namespace,
 123                                         $result->title )
 124                         );
 125                 }
 126
 127                 $link = Linker::link( $title );
 128                 $wlh = $this->makeWlhLink(
 129                         $title,
 130                         $this->msg( 'nlinks' )->numParams( $result->value )->escaped()
 131                 );
 132
 133                 return $this->getLanguage()->specialList( $link, $wlh );
 134         }
 135
 136         protected function getGroupName() {
 137                 return 'highuse';
 138         }
 139 }