<?php
/**
+ * Implements Special:Unusedimages
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
* @file
* @ingroup SpecialPage
*/
/**
- * implements Special:Unusedimages
+ * A special page that lists unused images
+ *
* @ingroup SpecialPage
*/
class UnusedimagesPage extends ImageQueryPage {
+ function __construct( $name = 'Unusedimages' ) {
+ parent::__construct( $name );
+ }
- function isExpensive() { return true; }
-
- function getName() {
- return 'Unusedimages';
+ function isExpensive() {
+ return true;
}
function sortDescending() {
return false;
}
- function isSyndicated() { return false; }
- function getSQL() {
- global $wgCountCategorizedImagesAsUsed, $wgDBtype;
- $dbr = wfGetDB( DB_SLAVE );
+ function isSyndicated() {
+ return false;
+ }
- $epoch = $wgDBtype == 'mysql' ?
- 'UNIX_TIMESTAMP(img_timestamp)' :
- 'EXTRACT(epoch FROM img_timestamp)';
+ function getQueryInfo() {
+ global $wgCountCategorizedImagesAsUsed;
+ $retval = array (
+ 'tables' => array ( 'image', 'imagelinks' ),
+ 'fields' => array ( "'" . NS_FILE . "' AS namespace",
+ 'img_name AS title',
+ 'img_timestamp AS value',
+ 'img_user', 'img_user_text',
+ 'img_description' ),
+ 'conds' => array ( 'il_to IS NULL' ),
+ 'join_conds' => array ( 'imagelinks' => array (
+ 'LEFT JOIN', 'il_to = img_name' ) )
+ );
if ( $wgCountCategorizedImagesAsUsed ) {
- list( $page, $image, $imagelinks, $categorylinks ) = $dbr->tableNamesN( 'page', 'image', 'imagelinks', 'categorylinks' );
-
- return "SELECT 'Unusedimages' as type, 6 as namespace, img_name as title, $epoch as value,
- img_user, img_user_text, img_description
- FROM ((($page AS I LEFT JOIN $categorylinks AS L ON I.page_id = L.cl_from)
- LEFT JOIN $imagelinks AS P ON I.page_title = P.il_to)
- INNER JOIN $image AS G ON I.page_title = G.img_name)
- WHERE I.page_namespace = ".NS_FILE." AND L.cl_from IS NULL AND P.il_to IS NULL";
- } else {
- list( $image, $imagelinks ) = $dbr->tableNamesN( 'image','imagelinks' );
-
- return "SELECT 'Unusedimages' as type, 6 as namespace, img_name as title, $epoch as value,
- img_user, img_user_text, img_description
- FROM $image LEFT JOIN $imagelinks ON img_name=il_to WHERE il_to IS NULL ";
+ // Order is significant
+ $retval['tables'] = array ( 'image', 'page', 'categorylinks',
+ 'imagelinks' );
+ $retval['conds']['page_namespace'] = NS_FILE;
+ $retval['conds'][] = 'cl_from IS NULL';
+ $retval['conds'][] = 'img_name = page_title';
+ $retval['join_conds']['categorylinks'] = array (
+ 'LEFT JOIN', 'cl_from = page_id' );
+ $retval['join_conds']['imagelinks'] = array (
+ 'LEFT JOIN', 'il_to = page_title' );
}
+ return $retval;
+ }
+
+ function usesTimestamps() {
+ return true;
}
function getPageHeader() {
}
}
-
-/**
- * Entry point
- */
-function wfSpecialUnusedimages() {
- list( $limit, $offset ) = wfCheckLimits();
- $uip = new UnusedimagesPage();
-
- return $uip->doQuery( $offset, $limit );
-}