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(
  49                                 'namespace' => 'page_namespace',
  50                                 'title' => 'page_title',
  51                                 'value' => 'COUNT(*)'
  52                         ),
  53                         'conds' => array( 'page_namespace' => MWNamespace::getContentNamespaces() ),
  54                         'options' => array(
  55                                 'HAVING' => 'COUNT(*) > 1',
  56                                 'GROUP BY' => array( 'page_namespace', 'page_title' )
  57                         ),
  58                         'join_conds' => array(
  59                                 'page' => array(
  60                                         'LEFT JOIN',
  61                                         'page_id = cl_from'
  62                                 )
  63                         )
  64                 );
  65         }
  66
  67         /**
  68          * @param IDatabase $db
  69          * @param ResultWrapper $res
  70          */
  71         function preprocessResults( $db, $res ) {
  72                 # There's no point doing a batch check if we aren't caching results;
  73                 # the page must exist for it to have been pulled out of the table
  74                 if ( !$this->isCached() || !$res->numRows() ) {
  75                         return;
  76                 }
  77
  78                 $batch = new LinkBatch();
  79                 foreach ( $res as $row ) {
  80                         $batch->add( $row->namespace, $row->title );
  81                 }
  82                 $batch->execute();
  83
  84                 $res->seek( 0 );
  85         }
  86
  87         /**
  88          * @param Skin $skin
  89          * @param object $result Result row
  90          * @return string
  91          */
  92         function formatResult( $skin, $result ) {
  93                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  94                 if ( !$title ) {
  95                         return Html::element(
  96                                 'span',
  97                                 array( 'class' => 'mw-invalidtitle' ),
  98                                 Linker::getInvalidTitleDescription(
  99                                         $this->getContext(),
 100                                         $result->namespace,
 101                                         $result->title
 102                                 )
 103                         );
 104                 }
 105
 106                 if ( $this->isCached() ) {
 107                         $link = Linker::link( $title );
 108                 } else {
 109                         $link = Linker::linkKnown( $title );
 110                 }
 111
 112                 $count = $this->msg( 'ncategories' )->numParams( $result->value )->escaped();
 113
 114                 return $this->getLanguage()->specialList( $link, $count );
 115         }
 116
 117         protected function getGroupName() {
 118                 return 'highuse';
 119         }
 120 }