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1<?php
2/**
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
17 *
18 * @file
19 */
20
21namespace MediaWiki\Specials;
22
23use MediaWiki\MainConfigNames;
24use MediaWiki\SpecialPage\ImageQueryPage;
25use Wikimedia\Rdbms\IConnectionProvider;
26
27/**
28 * List of unused images
29 *
30 * @ingroup SpecialPage
31 */
32class SpecialUnusedImages extends ImageQueryPage {
33
34    /**
35     * @param IConnectionProvider $dbProvider
36     */
37    public function __construct( IConnectionProvider $dbProvider ) {
38        parent::__construct( 'Unusedimages' );
39        $this->setDatabaseProvider( $dbProvider );
40    }
41
42    public function isExpensive() {
43        return true;
44    }
45
46    protected function sortDescending() {
47        return false;
48    }
49
50    public function isSyndicated() {
51        return false;
52    }
53
54    public function getQueryInfo() {
55        $retval = [
56            'tables' => [ 'image', 'imagelinks' ],
57            'fields' => [
58                'namespace' => NS_FILE,
59                'title' => 'img_name',
60                'value' => 'img_timestamp',
61            ],
62            'conds' => [ 'il_to' => null ],
63            'join_conds' => [ 'imagelinks' => [ 'LEFT JOIN', 'il_to = img_name' ] ]
64        ];
65
66        if ( $this->getConfig()->get( MainConfigNames::CountCategorizedImagesAsUsed ) ) {
67            // Order is significant
68            $retval['tables'] = [ 'image', 'page', 'categorylinks',
69                'imagelinks' ];
70            $retval['conds']['page_namespace'] = NS_FILE;
71            $retval['conds']['cl_from'] = null;
72            $retval['conds'][] = 'img_name = page_title';
73            $retval['join_conds']['categorylinks'] = [
74                'LEFT JOIN', 'cl_from = page_id' ];
75            $retval['join_conds']['imagelinks'] = [
76                'LEFT JOIN', 'il_to = page_title' ];
77        }
78
79        return $retval;
80    }
81
82    public function usesTimestamps() {
83        return true;
84    }
85
86    protected function getPageHeader() {
87        if ( $this->getConfig()->get( MainConfigNames::CountCategorizedImagesAsUsed ) ) {
88            return $this->msg(
89                'unusedimagestext-categorizedimgisused'
90            )->parseAsBlock();
91        }
92        return $this->msg( 'unusedimagestext' )->parseAsBlock();
93    }
94
95    protected function getGroupName() {
96        return 'maintenance';
97    }
98}
99
100/**
101 * Retain the old class name for backwards compatibility.
102 * @deprecated since 1.41
103 */
104class_alias( SpecialUnusedImages::class, 'SpecialUnusedImages' );