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' => array( '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          * @param $db DatabaseBase
  62          * @param $res
  63          */
  64         function preprocessResults( $db, $res ) {
  65                 if ( $res->numRows() > 0 ) {
  66                         $linkBatch = new LinkBatch();
  67                         foreach ( $res as $row ) {
  68                                 $linkBatch->add( $row->namespace, $row->title );
  69                         }
  70                         $res->seek( 0 );
  71                         $linkBatch->execute();
  72                 }
  73         }
  74
  75         /**
  76          * Make a link to "what links here" for the specified title
  77          *
  78          * @param $title Title being queried
  79          * @param $caption String: text to display on the link
  80          * @return String
  81          */
  82         function makeWlhLink( $title, $caption ) {
  83                 $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedDBkey() );
  84                 return Linker::linkKnown( $wlh, $caption );
  85         }
  86
  87         /**
  88          * Make links to the page corresponding to the item, and the "what links here" page for it
  89          *
  90          * @param $skin Skin to be used
  91          * @param $result Result row
  92          * @return string
  93          */
  94         function formatResult( $skin, $result ) {
  95                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  96                 if ( !$title ) {
  97                         return Html::element( 'span', array( 'class' => 'mw-invalidtitle' ),
  98                                 Linker::getInvalidTitleDescription( $this->getContext(), $result->namespace, $result->title ) );
  99                 }
 100                 $link = Linker::link( $title );
 101                 $wlh = $this->makeWlhLink( $title,
 102                         $this->msg( 'nlinks' )->numParams( $result->value )->escaped() );
 103                 return $this->getLanguage()->specialList( $link, $wlh );
 104         }
 105 }