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
  34         function __construct( $name = 'Mostcategories' ) {
  35                 parent::__construct( $name );
  36         }
  37
  38         function isExpensive() {
  39                 return true;
  40         }
  41
  42         function isSyndicated() {
  43                 return false;
  44         }
  45
  46         function getQueryInfo() {
  47                 return array (
  48                         'tables' => array ( 'categorylinks', 'page' ),
  49                         'fields' => array ( 'namespace' => 'page_namespace',
  50                                         'title' => 'page_title',
  51                                         'value' => 'COUNT(*)' ),
  52                         'conds' => array ( 'page_namespace' => MWNamespace::getContentNamespaces() ),
  53                         'options' => array ( 'HAVING' => 'COUNT(*) > 1',
  54                                 'GROUP BY' => array( 'page_namespace', 'page_title' ) ),
  55                         'join_conds' => array ( 'page' => array ( 'LEFT JOIN',
  56                                         'page_id = cl_from' ) )
  57                 );
  58         }
  59
  60         /**
  61          * @param $db DatabaseBase
  62          * @param $res
  63          */
  64         function preprocessResults( $db, $res ) {
  65                 # There's no point doing a batch check if we aren't caching results;
  66                 # the page must exist for it to have been pulled out of the table
  67                 if ( !$this->isCached() || !$res->numRows() ) {
  68                         return;
  69                 }
  70
  71                 $batch = new LinkBatch();
  72                 foreach ( $res as $row ) {
  73                         $batch->add( $row->namespace, $row->title );
  74                 }
  75                 $batch->execute();
  76
  77                 $res->seek( 0 );
  78         }
  79
  80         /**
  81          * @param $skin Skin
  82          * @param $result
  83          * @return string
  84          */
  85         function formatResult( $skin, $result ) {
  86                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  87                 if ( !$title ) {
  88                         return Html::element( 'span', array( 'class' => 'mw-invalidtitle' ),
  89                                 Linker::getInvalidTitleDescription( $this->getContext(), $result->namespace, $result->title ) );
  90                 }
  91
  92                 if ( $this->isCached() ) {
  93                         $link = Linker::link( $title );
  94                 } else {
  95                         $link = Linker::linkKnown( $title );
  96                 }
  97
  98                 $count = $this->msg( 'ncategories' )->numParams( $result->value )->escaped();
  99
 100                 return $this->getLanguage()->specialList( $link, $count );
 101         }
 102
 103         protected function getGroupName() {
 104                 return 'highuse';
 105         }
 106 }