includes/specials/SpecialUnusedimages.php

   1 <?php
   2 /**
   3  * Implements Special:Unusedimages
   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  * A special page that lists unused images
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class UnusedimagesPage extends ImageQueryPage {
  30         function __construct( $name = 'Unusedimages' ) {
  31                 parent::__construct( $name );
  32         }
  33
  34         function isExpensive() {
  35                 return true;
  36         }
  37
  38         function sortDescending() {
  39                 return false;
  40         }
  41
  42         function isSyndicated() {
  43                 return false;
  44         }
  45
  46         function getQueryInfo() {
  47                 global $wgCountCategorizedImagesAsUsed;
  48                 $retval = array(
  49                         'tables' => array( 'image', 'imagelinks' ),
  50                         'fields' => array(
  51                                 'namespace' => NS_FILE,
  52                                 'title' => 'img_name',
  53                                 'value' => 'img_timestamp',
  54                                 'img_user', 'img_user_text',
  55                                 'img_description'
  56                         ),
  57                         'conds' => array( 'il_to IS NULL' ),
  58                         'join_conds' => array( 'imagelinks' => array( 'LEFT JOIN', 'il_to = img_name' ) )
  59                 );
  60
  61                 if ( $wgCountCategorizedImagesAsUsed ) {
  62                         // Order is significant
  63                         $retval['tables'] = array( 'image', 'page', 'categorylinks',
  64                                 'imagelinks' );
  65                         $retval['conds']['page_namespace'] = NS_FILE;
  66                         $retval['conds'][] = 'cl_from IS NULL';
  67                         $retval['conds'][] = 'img_name = page_title';
  68                         $retval['join_conds']['categorylinks'] = array(
  69                                 'LEFT JOIN', 'cl_from = page_id' );
  70                         $retval['join_conds']['imagelinks'] = array(
  71                                 'LEFT JOIN', 'il_to = page_title' );
  72                 }
  73
  74                 return $retval;
  75         }
  76
  77         function usesTimestamps() {
  78                 return true;
  79         }
  80
  81         function getPageHeader() {
  82                 return $this->msg( 'unusedimagestext' )->parseAsBlock();
  83         }
  84
  85         protected function getGroupName() {
  86                 return 'maintenance';
  87         }
  88 }