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| 1 | <?php |
| 2 | /** |
| 3 | * Implements Special:GloballyUnusedFiles, the global equivalent to |
| 4 | * Special:UnusedFiles |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 19 | * http://www.gnu.org/copyleft/gpl.html |
| 20 | * |
| 21 | * @file |
| 22 | * @ingroup SpecialPage |
| 23 | */ |
| 24 | |
| 25 | namespace MediaWiki\Extension\GlobalUsage; |
| 26 | |
| 27 | use ErrorPageError; |
| 28 | use MediaWiki\SpecialPage\ImageQueryPage; |
| 29 | use MediaWiki\WikiMap\WikiMap; |
| 30 | use RuntimeException; |
| 31 | |
| 32 | /** |
| 33 | * A special page that lists globally unused files |
| 34 | * |
| 35 | * @ingroup SpecialPage |
| 36 | */ |
| 37 | class SpecialGloballyUnusedFiles extends ImageQueryPage { |
| 38 | public function __construct( $name = 'GloballyUnusedFiles' ) { |
| 39 | parent::__construct( $name ); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Check if we are on wiki with globalimagelinks table in database. |
| 44 | * @return bool |
| 45 | */ |
| 46 | private function isOnGlobalUsageDatabase() { |
| 47 | global $wgGlobalUsageDatabase; |
| 48 | return !$wgGlobalUsageDatabase || $wgGlobalUsageDatabase === WikiMap::getCurrentWikiId(); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Main execution function. Use the parent if we're on the right wiki. |
| 53 | * @param string $par |
| 54 | * @throws ErrorPageError if we are not on a wiki with GlobalUsage database |
| 55 | */ |
| 56 | public function execute( $par ) { |
| 57 | if ( $this->isOnGlobalUsageDatabase() ) { |
| 58 | parent::execute( $par ); |
| 59 | } else { |
| 60 | throw new ErrorPageError( 'globallyunusedfiles', 'globallyunusedfiles-error-nonsharedrepo' ); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Allow to cache only if globalimagelinks table exists in database. |
| 66 | * @return bool |
| 67 | */ |
| 68 | public function isCacheable() { |
| 69 | return $this->isOnGlobalUsageDatabase(); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Only list this special page on the wiki that has globalimagelinks table. |
| 74 | * @return bool Should this be listed in Special:SpecialPages |
| 75 | */ |
| 76 | public function isListed() { |
| 77 | return $this->isOnGlobalUsageDatabase(); |
| 78 | } |
| 79 | |
| 80 | public function isExpensive() { |
| 81 | return true; |
| 82 | } |
| 83 | |
| 84 | public function sortDescending() { |
| 85 | return false; |
| 86 | } |
| 87 | |
| 88 | public function isSyndicated() { |
| 89 | return false; |
| 90 | } |
| 91 | |
| 92 | public function getQueryInfo() { |
| 93 | if ( !$this->isOnGlobalUsageDatabase() ) { |
| 94 | throw new RuntimeException( "This wiki is not on shared repo" ); |
| 95 | } |
| 96 | |
| 97 | $retval = [ |
| 98 | 'tables' => [ 'image', 'globalimagelinks' ], |
| 99 | 'fields' => [ |
| 100 | 'namespace' => NS_FILE, |
| 101 | 'title' => 'img_name', |
| 102 | 'value' => 'img_timestamp', |
| 103 | ], |
| 104 | 'conds' => [ 'gil_to' => null ], |
| 105 | 'join_conds' => [ 'globalimagelinks' => [ 'LEFT JOIN', 'gil_to = img_name' ] ] |
| 106 | ]; |
| 107 | |
| 108 | if ( $this->getConfig()->get( 'CountCategorizedImagesAsUsed' ) ) { |
| 109 | // Order is significant |
| 110 | $retval['tables'] = [ 'image', 'page', 'categorylinks', |
| 111 | 'globalimagelinks' ]; |
| 112 | $retval['conds']['page_namespace'] = NS_FILE; |
| 113 | $retval['conds']['cl_from'] = null; |
| 114 | $retval['conds'][] = 'img_name = page_title'; |
| 115 | $retval['join_conds']['categorylinks'] = [ |
| 116 | 'LEFT JOIN', 'cl_from = page_id' ]; |
| 117 | $retval['join_conds']['globalimagelinks'] = [ |
| 118 | 'LEFT JOIN', 'gil_to = page_title' ]; |
| 119 | } |
| 120 | |
| 121 | return $retval; |
| 122 | } |
| 123 | |
| 124 | public function usesTimestamps() { |
| 125 | return true; |
| 126 | } |
| 127 | |
| 128 | public function getPageHeader() { |
| 129 | return $this->msg( 'globallyunusedfilestext' )->parseAsBlock(); |
| 130 | } |
| 131 | |
| 132 | protected function getGroupName() { |
| 133 | return 'maintenance'; |
| 134 | } |
| 135 | } |