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SpecialUnusedImages.php
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SpecialUnusedImages.php
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<?php
/**
* 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
*/
namespace MediaWiki\Specials;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\SpecialPage\ImageQueryPage;
use Wikimedia\Rdbms\IConnectionProvider;
/**
* List of unused images
*
* @ingroup SpecialPage
*/
class SpecialUnusedImages extends ImageQueryPage {
private int $migrationStage;
public function __construct( IConnectionProvider $dbProvider ) {
parent::__construct( 'Unusedimages' );
$this->setDatabaseProvider( $dbProvider );
$this->migrationStage = MediaWikiServices::getInstance()->getMainConfig()->get(
MainConfigNames::FileSchemaMigrationStage
);
}
public function isExpensive() {
return true;
}
protected function sortDescending() {
return false;
}
public function isSyndicated() {
return false;
}
public function getQueryInfo() {
if ( $this->migrationStage & SCHEMA_COMPAT_READ_OLD ) {
$tables = [ 'image' ];
$nameField = 'img_name';
$timestampField = 'img_timestamp';
$extraConds = [];
$extraJoins = [];
} else {
$tables = [ 'file', 'filerevision' ];
$nameField = 'file_name';
$timestampField = 'fr_timestamp';
$extraConds = [ 'file_deleted' => 0 ];
$extraJoins = [ 'filerevision' => [ 'JOIN', 'file_latest = fr_id' ] ];
}
$retval = [
'tables' => array_merge( $tables, [ 'imagelinks' ] ),
'fields' => [
'namespace' => NS_FILE,
'title' => $nameField,
'value' => $timestampField,
],
'conds' => array_merge( [ 'il_to' => null ], $extraConds ),
'join_conds' => array_merge(
[ 'imagelinks' => [ 'LEFT JOIN', 'il_to = ' . $nameField ] ],
$extraJoins
),
];
if ( $this->getConfig()->get( MainConfigNames::CountCategorizedImagesAsUsed ) ) {
// Order is significant
$retval['tables'] = [ 'image', 'page', 'categorylinks',
'imagelinks' ];
$retval['conds']['page_namespace'] = NS_FILE;
$retval['conds']['cl_from'] = null;
$retval['conds'][] = $nameField . ' = page_title';
$retval['join_conds']['categorylinks'] = [
'LEFT JOIN', 'cl_from = page_id' ];
$retval['join_conds']['imagelinks'] = [
'LEFT JOIN', 'il_to = page_title' ];
}
return $retval;
}
public function usesTimestamps() {
return true;
}
protected function getPageHeader() {
if ( $this->getConfig()->get( MainConfigNames::CountCategorizedImagesAsUsed ) ) {
return $this->msg(
'unusedimagestext-categorizedimgisused'
)->parseAsBlock();
}
return $this->msg( 'unusedimagestext' )->parseAsBlock();
}
protected function getGroupName() {
return 'maintenance';
}
}
/**
* Retain the old class name for backwards compatibility.
* @deprecated since 1.41
*/
class_alias( SpecialUnusedImages::class, 'SpecialUnusedImages' );

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SpecialUnusedImages.php (3 KB)

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