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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 | |
| 21 | namespace MediaWiki\Specials; |
| 22 | |
| 23 | use MediaWiki\Cache\LinkBatchFactory; |
| 24 | use MediaWiki\Languages\LanguageConverterFactory; |
| 25 | use MediaWiki\SpecialPage\PageQueryPage; |
| 26 | use MediaWiki\Title\NamespaceInfo; |
| 27 | use Wikimedia\Rdbms\IConnectionProvider; |
| 28 | |
| 29 | /** |
| 30 | * List of pages that contain no links to other pages. |
| 31 | * |
| 32 | * @ingroup SpecialPage |
| 33 | */ |
| 34 | class SpecialDeadendPages extends PageQueryPage { |
| 35 | |
| 36 | private NamespaceInfo $namespaceInfo; |
| 37 | |
| 38 | /** |
| 39 | * @param NamespaceInfo $namespaceInfo |
| 40 | * @param IConnectionProvider $dbProvider |
| 41 | * @param LinkBatchFactory $linkBatchFactory |
| 42 | * @param LanguageConverterFactory $languageConverterFactory |
| 43 | */ |
| 44 | public function __construct( |
| 45 | NamespaceInfo $namespaceInfo, |
| 46 | IConnectionProvider $dbProvider, |
| 47 | LinkBatchFactory $linkBatchFactory, |
| 48 | LanguageConverterFactory $languageConverterFactory |
| 49 | ) { |
| 50 | parent::__construct( 'Deadendpages' ); |
| 51 | $this->namespaceInfo = $namespaceInfo; |
| 52 | $this->setDatabaseProvider( $dbProvider ); |
| 53 | $this->setLinkBatchFactory( $linkBatchFactory ); |
| 54 | $this->setLanguageConverter( $languageConverterFactory->getLanguageConverter( $this->getContentLanguage() ) ); |
| 55 | } |
| 56 | |
| 57 | protected function getPageHeader() { |
| 58 | return $this->msg( 'deadendpagestext' )->parseAsBlock(); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * LEFT JOIN is expensive |
| 63 | * |
| 64 | * @return bool |
| 65 | */ |
| 66 | public function isExpensive() { |
| 67 | return true; |
| 68 | } |
| 69 | |
| 70 | public function isSyndicated() { |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * @return bool |
| 76 | */ |
| 77 | protected function sortDescending() { |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | public function getQueryInfo() { |
| 82 | return [ |
| 83 | 'tables' => [ 'page', 'pagelinks' ], |
| 84 | 'fields' => [ |
| 85 | 'namespace' => 'page_namespace', |
| 86 | 'title' => 'page_title', |
| 87 | ], |
| 88 | 'conds' => [ |
| 89 | 'pl_from' => null, |
| 90 | 'page_namespace' => $this->namespaceInfo->getContentNamespaces(), |
| 91 | 'page_is_redirect' => 0 |
| 92 | ], |
| 93 | 'join_conds' => [ |
| 94 | 'pagelinks' => [ |
| 95 | 'LEFT JOIN', |
| 96 | [ 'page_id=pl_from' ] |
| 97 | ] |
| 98 | ] |
| 99 | ]; |
| 100 | } |
| 101 | |
| 102 | protected function getOrderFields() { |
| 103 | // For some crazy reason ordering by a constant |
| 104 | // causes a filesort |
| 105 | if ( count( $this->namespaceInfo->getContentNamespaces() ) > 1 ) { |
| 106 | return [ 'page_namespace', 'page_title' ]; |
| 107 | } else { |
| 108 | return [ 'page_title' ]; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | protected function getGroupName() { |
| 113 | return 'maintenance'; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /** @deprecated class alias since 1.41 */ |
| 118 | class_alias( SpecialDeadendPages::class, 'SpecialDeadendPages' ); |