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