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() {
  40                 return true;
  41         }
  42
  43         function isSyndicated() {
  44                 return false;
  45         }
  46
  47         function getQueryInfo() {
  48                 return array(
  49                         'tables' => array( 'pagelinks', 'page' ),
  50                         'fields' => array( 'namespace' => 'pl_namespace',
  51                                         'title' => 'pl_title',
  52                                         'value' => 'COUNT(*)',
  53                                         'page_namespace' ),
  54                         'options' => array( 'HAVING' => 'COUNT(*) > 1',
  55                                 'GROUP BY' => array( 'pl_namespace', 'pl_title',
  56                                                 'page_namespace' ) ),
  57                         'join_conds' => array( 'page' => array( 'LEFT JOIN',
  58                                         array( 'page_namespace = pl_namespace',
  59                                                 'page_title = pl_title' ) ) )
  60                 );
  61         }
  62
  63         /**
  64          * Pre-fill the link cache
  65          *
  66          * @param DatabaseBase $db
  67          * @param ResultWrapper $res
  68          */
  69         function preprocessResults( $db, $res ) {
  70                 if ( $res->numRows() > 0 ) {
  71                         $linkBatch = new LinkBatch();
  72                         foreach ( $res as $row ) {
  73                                 $linkBatch->add( $row->namespace, $row->title );
  74                         }
  75                         $res->seek( 0 );
  76                         $linkBatch->execute();
  77                 }
  78         }
  79
  80         /**
  81          * Make a link to "what links here" for the specified title
  82          *
  83          * @param $title Title being queried
  84          * @param string $caption text to display on the link
  85          * @return String
  86          */
  87         function makeWlhLink( $title, $caption ) {
  88                 $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedDBkey() );
  89                 return Linker::linkKnown( $wlh, $caption );
  90         }
  91
  92         /**
  93          * Make links to the page corresponding to the item, and the "what links here" page for it
  94          *
  95          * @param Skin $skin Skin to be used
  96          * @param object $result Result row
  97          * @return string
  98          */
  99         function formatResult( $skin, $result ) {
 100                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
 101                 if ( !$title ) {
 102                         return Html::element( 'span', array( 'class' => 'mw-invalidtitle' ),
 103                                 Linker::getInvalidTitleDescription( $this->getContext(), $result->namespace, $result->title ) );
 104                 }
 105                 $link = Linker::link( $title );
 106                 $wlh = $this->makeWlhLink( $title,
 107                         $this->msg( 'nlinks' )->numParams( $result->value )->escaped() );
 108                 return $this->getLanguage()->specialList( $link, $wlh );
 109         }
 110
 111         protected function getGroupName() {
 112                 return 'highuse';
 113         }
 114 }