includes/specials/SpecialMostcategories.php

   1 <?php
   2 /**
   3  * Implements Special:Mostcategories
   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 special page that list pages that have highest category count
  29  *
  30  * @ingroup SpecialPage
  31  */
  32 class MostcategoriesPage extends QueryPage {
  33         function __construct( $name = 'Mostcategories' ) {
  34                 parent::__construct( $name );
  35         }
  36
  37         function isExpensive() {
  38                 return true;
  39         }
  40
  41         function isSyndicated() {
  42                 return false;
  43         }
  44
  45         function getQueryInfo() {
  46                 return array(
  47                         'tables' => array( 'categorylinks', 'page' ),
  48                         'fields' => array( 'namespace' => 'page_namespace',
  49                                         'title' => 'page_title',
  50                                         'value' => 'COUNT(*)' ),
  51                         'conds' => array( 'page_namespace' => MWNamespace::getContentNamespaces() ),
  52                         'options' => array( 'HAVING' => 'COUNT(*) > 1',
  53                                 'GROUP BY' => array( 'page_namespace', 'page_title' ) ),
  54                         'join_conds' => array( 'page' => array( 'LEFT JOIN',
  55                                         'page_id = cl_from' ) )
  56                 );
  57         }
  58
  59         /**
  60          * @param DatabaseBase $db
  61          * @param ResultWrapper $res
  62          */
  63         function preprocessResults( $db, $res ) {
  64                 # There's no point doing a batch check if we aren't caching results;
  65                 # the page must exist for it to have been pulled out of the table
  66                 if ( !$this->isCached() || !$res->numRows() ) {
  67                         return;
  68                 }
  69
  70                 $batch = new LinkBatch();
  71                 foreach ( $res as $row ) {
  72                         $batch->add( $row->namespace, $row->title );
  73                 }
  74                 $batch->execute();
  75
  76                 $res->seek( 0 );
  77         }
  78
  79         /**
  80          * @param Skin $skin
  81          * @param object $result Result row
  82          * @return string
  83          */
  84         function formatResult( $skin, $result ) {
  85                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  86                 if ( !$title ) {
  87                         return Html::element( 'span', array( 'class' => 'mw-invalidtitle' ),
  88                                 Linker::getInvalidTitleDescription( $this->getContext(), $result->namespace, $result->title ) );
  89                 }
  90
  91                 if ( $this->isCached() ) {
  92                         $link = Linker::link( $title );
  93                 } else {
  94                         $link = Linker::linkKnown( $title );
  95                 }
  96
  97                 $count = $this->msg( 'ncategories' )->numParams( $result->value )->escaped();
  98
  99                 return $this->getLanguage()->specialList( $link, $count );
 100         }
 101
 102         protected function getGroupName() {
 103                 return 'highuse';
 104         }
 105 }