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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright © 2013 Brian Wolff |
| 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 | */ |
| 22 | |
| 23 | namespace MediaWiki\Specials; |
| 24 | |
| 25 | use MediaWiki\Cache\LinkBatchFactory; |
| 26 | use MediaWiki\SpecialPage\QueryPage; |
| 27 | use MediaWiki\SpecialPage\SpecialPage; |
| 28 | use MediaWiki\Title\Title; |
| 29 | use Skin; |
| 30 | use stdClass; |
| 31 | use Wikimedia\Rdbms\IConnectionProvider; |
| 32 | use Wikimedia\Rdbms\IDatabase; |
| 33 | use Wikimedia\Rdbms\IResultWrapper; |
| 34 | |
| 35 | /** |
| 36 | * List all files where the current version is a duplicate of the current |
| 37 | * version of another file. |
| 38 | * |
| 39 | * @ingroup SpecialPage |
| 40 | * @author Brian Wolff |
| 41 | */ |
| 42 | class SpecialListDuplicatedFiles extends QueryPage { |
| 43 | |
| 44 | /** |
| 45 | * @param IConnectionProvider $dbProvider |
| 46 | * @param LinkBatchFactory $linkBatchFactory |
| 47 | */ |
| 48 | public function __construct( |
| 49 | IConnectionProvider $dbProvider, |
| 50 | LinkBatchFactory $linkBatchFactory |
| 51 | ) { |
| 52 | parent::__construct( 'ListDuplicatedFiles' ); |
| 53 | $this->setDatabaseProvider( $dbProvider ); |
| 54 | $this->setLinkBatchFactory( $linkBatchFactory ); |
| 55 | } |
| 56 | |
| 57 | public function isExpensive() { |
| 58 | return true; |
| 59 | } |
| 60 | |
| 61 | public function isSyndicated() { |
| 62 | return false; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Get all the duplicates by grouping on sha1s. |
| 67 | * |
| 68 | * A cheaper (but less useful) version of this |
| 69 | * query would be to not care how many duplicates a |
| 70 | * particular file has, and do a self-join on image table. |
| 71 | * However this version should be no more expensive then |
| 72 | * Special:MostLinked, which seems to get handled fine |
| 73 | * with however we are doing cached special pages. |
| 74 | * @return array |
| 75 | */ |
| 76 | public function getQueryInfo() { |
| 77 | return [ |
| 78 | 'tables' => [ 'image' ], |
| 79 | 'fields' => [ |
| 80 | 'namespace' => NS_FILE, |
| 81 | 'title' => 'MIN(img_name)', |
| 82 | 'value' => 'count(*)' |
| 83 | ], |
| 84 | 'options' => [ |
| 85 | 'GROUP BY' => 'img_sha1', |
| 86 | 'HAVING' => 'count(*) > 1', |
| 87 | ], |
| 88 | ]; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Pre-fill the link cache |
| 93 | * |
| 94 | * @param IDatabase $db |
| 95 | * @param IResultWrapper $res |
| 96 | */ |
| 97 | public function preprocessResults( $db, $res ) { |
| 98 | $this->executeLBFromResultWrapper( $res ); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @param Skin $skin |
| 103 | * @param stdClass $result Result row |
| 104 | * @return string |
| 105 | */ |
| 106 | public function formatResult( $skin, $result ) { |
| 107 | // Future version might include a list of the first 5 duplicates |
| 108 | // perhaps separated by an "↔". |
| 109 | $image1 = Title::makeTitle( $result->namespace, $result->title ); |
| 110 | $dupeSearch = SpecialPage::getTitleFor( 'FileDuplicateSearch', $image1->getDBkey() ); |
| 111 | |
| 112 | $msg = $this->msg( 'listduplicatedfiles-entry' ) |
| 113 | ->params( $image1->getText() ) |
| 114 | ->numParams( $result->value - 1 ) |
| 115 | ->params( $dupeSearch->getPrefixedDBkey() ); |
| 116 | |
| 117 | return $msg->parse(); |
| 118 | } |
| 119 | |
| 120 | public function execute( $par ) { |
| 121 | $this->addHelpLink( 'Help:Managing_files' ); |
| 122 | parent::execute( $par ); |
| 123 | } |
| 124 | |
| 125 | protected function getGroupName() { |
| 126 | return 'media'; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | /** @deprecated class alias since 1.41 */ |
| 131 | class_alias( SpecialListDuplicatedFiles::class, 'SpecialListDuplicatedFiles' ); |