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 getName() { return 'Mostlinkedcategories'; }
  35         function isExpensive() { return true; }
  36         function isSyndicated() { return false; }
  37
  38         function getSQL() {
  39                 $dbr = wfGetDB( DB_SLAVE );
  40                 $categorylinks = $dbr->tableName( 'categorylinks' );
  41                 $name = $dbr->addQuotes( $this->getName() );
  42                 return
  43                         "
  44                         SELECT
  45                                 $name as type,
  46                                 " . NS_CATEGORY . " as namespace,
  47                                 cl_to as title,
  48                                 COUNT(*) as value
  49                         FROM $categorylinks
  50                         GROUP BY cl_to
  51                         ";
  52         }
  53
  54         function sortDescending() { return true; }
  55
  56         /**
  57          * Fetch user page links and cache their existence
  58          */
  59         function preprocessResults( $db, $res ) {
  60                 $batch = new LinkBatch;
  61                 while ( $row = $db->fetchObject( $res ) )
  62                         $batch->add( $row->namespace, $row->title );
  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         function formatResult( $skin, $result ) {
  72                 global $wgLang, $wgContLang;
  73
  74                 $nt = Title::makeTitle( $result->namespace, $result->title );
  75                 $text = $wgContLang->convert( $nt->getText() );
  76
  77                 $plink = $skin->link( $nt, htmlspecialchars( $text ) );
  78
  79                 $nlinks = wfMsgExt( 'nmembers', array( 'parsemag', 'escape'),
  80                         $wgLang->formatNum( $result->value ) );
  81                 return wfSpecialList($plink, $nlinks);
  82         }
  83 }
  84
  85 /**
  86  * constructor
  87  */
  88 function wfSpecialMostlinkedCategories() {
  89         list( $limit, $offset ) = wfCheckLimits();
  90
  91         $wpp = new MostlinkedCategoriesPage();
  92
  93         $wpp->doQuery( $offset, $limit );
  94 }