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
  35         function __construct( $name = 'Mostlinked' ) {
  36                 parent::__construct( $name );
  37         }
  38
  39         function isExpensive() { return true; }
  40         function isSyndicated() { return false; }
  41
  42         function getQueryInfo() {
  43                 return array (
  44                         'tables' => array ( 'pagelinks', 'page' ),
  45                         'fields' => array ( 'pl_namespace AS namespace',
  46                                         'pl_title AS title',
  47                                         'COUNT(*) AS value',
  48                                         'page_namespace' ),
  49                         'options' => array ( 'HAVING' => 'COUNT(*) > 1',
  50                                 'GROUP BY' => 'pl_namespace, pl_title, '.
  51                                                 'page_namespace' ),
  52                         'join_conds' => array ( 'page' => array ( 'LEFT JOIN',
  53                                         array ( 'page_namespace = pl_namespace',
  54                                                 'page_title = pl_title' ) ) )
  55                 );
  56         }
  57
  58         /**
  59          * Pre-fill the link cache
  60          */
  61         function preprocessResults( $db, $res ) {
  62                 if( $db->numRows( $res ) > 0 ) {
  63                         $linkBatch = new LinkBatch();
  64                         foreach ( $res as $row ) {
  65                                 $linkBatch->add( $row->namespace, $row->title );
  66                         }
  67                         $db->dataSeek( $res, 0 );
  68                         $linkBatch->execute();
  69                 }
  70         }
  71
  72         /**
  73          * Make a link to "what links here" for the specified title
  74          *
  75          * @param $title Title being queried
  76          * @param $caption String: text to display on the link
  77          * @param $skin Skin to use
  78          * @return String
  79          */
  80         function makeWlhLink( &$title, $caption, &$skin ) {
  81                 $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedDBkey() );
  82                 return $skin->linkKnown( $wlh, $caption );
  83         }
  84
  85         /**
  86          * Make links to the page corresponding to the item, and the "what links here" page for it
  87          *
  88          * @param $skin Skin to be used
  89          * @param $result Result row
  90          * @return string
  91          */
  92         function formatResult( $skin, $result ) {
  93                 global $wgLang;
  94                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  95                 if ( !$title ) {
  96                         return '<!-- ' . htmlspecialchars( "Invalid title: [[$title]]" ) . ' -->';
  97                 }
  98                 $link = $skin->link( $title );
  99                 $wlh = $this->makeWlhLink( $title,
 100                         wfMsgExt( 'nlinks', array( 'parsemag', 'escape'),
 101                                 $wgLang->formatNum( $result->value ) ), $skin );
 102                 return wfSpecialList( $link, $wlh );
 103         }
 104 }