includes/specials/SpecialMostlinkedcategories.php

   1 <?php
   2 /**
   3  * Implements Special:Mostlinkedcategories
   4  *
   5  * Copyright © 2005, Ævar Arnfjörð Bjarmason
   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  */
  26
  27 /**
  28  * A querypage to show categories ordered in descending order by the pages  in them
  29  *
  30  * @ingroup SpecialPage
  31  */
  32 class MostlinkedCategoriesPage extends QueryPage {
  33
  34         function __construct( $name = 'Mostlinkedcategories' ) {
  35                 parent::__construct( $name );
  36         }
  37
  38         function isExpensive() { return true; }
  39         function isSyndicated() { return false; }
  40
  41         function getQueryInfo() {
  42                 return array (
  43                         'tables' => array ( 'categorylinks' ),
  44                         'fields' => array ( 'cl_to AS title',
  45                                         NS_CATEGORY . ' AS namespace',
  46                                         'COUNT(*) AS value' ),
  47                         'options' => array ( 'GROUP BY' => 'cl_to' )
  48                 );
  49         }
  50
  51         function sortDescending() { return true; }
  52
  53         /**
  54          * Fetch user page links and cache their existence
  55          *
  56          * @param $db DatabaseBase
  57          */
  58         function preprocessResults( $db, $res ) {
  59                 $batch = new LinkBatch;
  60                 foreach ( $res as $row ) {
  61                         $batch->add( NS_CATEGORY, $row->title );
  62                 }
  63                 $batch->execute();
  64
  65                 // Back to start for display
  66                 if ( $db->numRows( $res ) > 0 ) {
  67                         // If there are no rows we get an error seeking.
  68                         $db->dataSeek( $res, 0 );
  69                 }
  70         }
  71
  72         /**
  73          * @param $skin Skin
  74          * @param  $result
  75          * @return string
  76          */
  77         function formatResult( $skin, $result ) {
  78                 global $wgLang, $wgContLang;
  79
  80                 $nt = Title::makeTitle( NS_CATEGORY, $result->title );
  81                 $text = $wgContLang->convert( $nt->getText() );
  82
  83                 $plink = $skin->link( $nt, htmlspecialchars( $text ) );
  84
  85                 $nlinks = wfMsgExt( 'nmembers', array( 'parsemag', 'escape' ),
  86                         $wgLang->formatNum( $result->value ) );
  87                 return wfSpecialList( $plink, $nlinks );
  88         }
  89 }