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
  31         function isExpensive() { return true; }
  32
  33         function getName() {
  34                 return 'Unusedimages';
  35         }
  36
  37         function sortDescending() {
  38                 return false;
  39         }
  40         function isSyndicated() { return false; }
  41
  42         function getSQL() {
  43                 global $wgCountCategorizedImagesAsUsed;
  44
  45                 $dbr = wfGetDB( DB_SLAVE );
  46
  47                 $epoch = $db->unixTimestamp( 'rev_timestamp' );
  48
  49                 if ( $wgCountCategorizedImagesAsUsed ) {
  50                         list( $page, $image, $imagelinks, $categorylinks ) = $dbr->tableNamesN( 'page', 'image', 'imagelinks', 'categorylinks' );
  51
  52                         return "SELECT 'Unusedimages' as type, 6 as namespace, img_name as title, $epoch as value,
  53                                                 img_user, img_user_text,  img_description
  54                                         FROM ((($page AS I LEFT JOIN $categorylinks AS L ON I.page_id = L.cl_from)
  55                                                 LEFT JOIN $imagelinks AS P ON I.page_title = P.il_to)
  56                                                 INNER JOIN $image AS G ON I.page_title = G.img_name)
  57                                         WHERE I.page_namespace = ".NS_FILE." AND L.cl_from IS NULL AND P.il_to IS NULL";
  58                 } else {
  59                         list( $image, $imagelinks ) = $dbr->tableNamesN( 'image','imagelinks' );
  60
  61                         return "SELECT 'Unusedimages' as type, 6 as namespace, img_name as title, $epoch as value,
  62                                 img_user, img_user_text,  img_description
  63                                 FROM $image LEFT JOIN $imagelinks ON img_name=il_to WHERE il_to IS NULL ";
  64                 }
  65         }
  66
  67         function getPageHeader() {
  68                 return wfMsgExt( 'unusedimagestext', array( 'parse' ) );
  69         }
  70
  71 }
  72
  73 /**
  74  * Entry point
  75  */
  76 function wfSpecialUnusedimages() {
  77         list( $limit, $offset ) = wfCheckLimits();
  78         $uip = new UnusedimagesPage();
  79
  80         return $uip->doQuery( $offset, $limit );
  81 }