includes/specials/SpecialUnusedcategories.php

   1 <?php
   2 /**
   3  * Implements Special:Unusedcategories
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * @ingroup SpecialPage
  26  */
  27 class UnusedCategoriesPage extends QueryPage {
  28         function __construct( $name = 'Unusedcategories' ) {
  29                 parent::__construct( $name );
  30         }
  31
  32         public function isExpensive() {
  33                 return true;
  34         }
  35
  36         function getPageHeader() {
  37                 return $this->msg( 'unusedcategoriestext' )->parseAsBlock();
  38         }
  39
  40         function getOrderFields() {
  41                 return [ 'title' ];
  42         }
  43
  44         public function getQueryInfo() {
  45                 return [
  46                         'tables' => [ 'page', 'categorylinks' ],
  47                         'fields' => [
  48                                 'namespace' => 'page_namespace',
  49                                 'title' => 'page_title',
  50                         ],
  51                         'conds' => [
  52                                 'cl_from IS NULL',
  53                                 'page_namespace' => NS_CATEGORY,
  54                                 'page_is_redirect' => 0
  55                         ],
  56                         'join_conds' => [ 'categorylinks' => [ 'LEFT JOIN', 'cl_to = page_title' ] ]
  57                 ];
  58         }
  59
  60         /**
  61          * A should come before Z (T32907)
  62          * @return bool
  63          */
  64         function sortDescending() {
  65                 return false;
  66         }
  67
  68         /**
  69          * @param Skin $skin
  70          * @param object $result Result row
  71          * @return string
  72          */
  73         function formatResult( $skin, $result ) {
  74                 $title = Title::makeTitle( NS_CATEGORY, $result->title );
  75
  76                 return $this->getLinkRenderer()->makeLink( $title, $title->getText() );
  77         }
  78
  79         protected function getGroupName() {
  80                 return 'maintenance';
  81         }
  82
  83         public function preprocessResults( $db, $res ) {
  84                 $this->executeLBFromResultWrapper( $res );
  85         }
  86 }