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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | */ |
| 6 | |
| 7 | namespace MediaWiki\Specials; |
| 8 | |
| 9 | use MediaWiki\Html\Html; |
| 10 | use MediaWiki\Linker\Linker; |
| 11 | use MediaWiki\MainConfigNames; |
| 12 | use MediaWiki\Page\LinkBatchFactory; |
| 13 | use MediaWiki\Skin\Skin; |
| 14 | use MediaWiki\SpecialPage\QueryPage; |
| 15 | use MediaWiki\Title\NamespaceInfo; |
| 16 | use MediaWiki\Title\Title; |
| 17 | use stdClass; |
| 18 | use Wikimedia\Rdbms\IConnectionProvider; |
| 19 | use Wikimedia\Rdbms\IReadableDatabase; |
| 20 | use Wikimedia\Rdbms\IResultWrapper; |
| 21 | |
| 22 | /** |
| 23 | * List of the shortest pages in the database. |
| 24 | * |
| 25 | * @ingroup SpecialPage |
| 26 | */ |
| 27 | class SpecialShortPages extends QueryPage { |
| 28 | |
| 29 | public function __construct( |
| 30 | private readonly NamespaceInfo $namespaceInfo, |
| 31 | IConnectionProvider $dbProvider, |
| 32 | LinkBatchFactory $linkBatchFactory |
| 33 | ) { |
| 34 | parent::__construct( 'Shortpages' ); |
| 35 | $this->setDatabaseProvider( $dbProvider ); |
| 36 | $this->setLinkBatchFactory( $linkBatchFactory ); |
| 37 | } |
| 38 | |
| 39 | /** @inheritDoc */ |
| 40 | public function isSyndicated() { |
| 41 | return false; |
| 42 | } |
| 43 | |
| 44 | /** @inheritDoc */ |
| 45 | public function getQueryInfo() { |
| 46 | $config = $this->getConfig(); |
| 47 | $tables = [ 'page' ]; |
| 48 | $conds = [ |
| 49 | 'page_namespace' => array_diff( |
| 50 | $this->namespaceInfo->getContentNamespaces(), |
| 51 | $config->get( MainConfigNames::ShortPagesNamespaceExclusions ) |
| 52 | ), |
| 53 | 'page_is_redirect' => 0 |
| 54 | ]; |
| 55 | $joinConds = []; |
| 56 | $options = [ 'USE INDEX' => [ 'page' => 'page_redirect_namespace_len' ] ]; |
| 57 | |
| 58 | // Allow extensions to modify the query |
| 59 | $this->getHookRunner()->onShortPagesQuery( $tables, $conds, $joinConds, $options ); |
| 60 | |
| 61 | return [ |
| 62 | 'tables' => $tables, |
| 63 | 'fields' => [ |
| 64 | 'namespace' => 'page_namespace', |
| 65 | 'title' => 'page_title', |
| 66 | 'value' => 'page_len' |
| 67 | ], |
| 68 | 'conds' => $conds, |
| 69 | 'join_conds' => $joinConds, |
| 70 | 'options' => $options |
| 71 | ]; |
| 72 | } |
| 73 | |
| 74 | /** @inheritDoc */ |
| 75 | public function reallyDoQuery( $limit, $offset = false ) { |
| 76 | $fname = static::class . '::reallyDoQuery'; |
| 77 | $dbr = $this->getRecacheDB(); |
| 78 | $query = $this->getQueryInfo(); |
| 79 | $conds = isset( $query['conds'] ) ? (array)$query['conds'] : []; |
| 80 | $namespaces = $conds['page_namespace']; |
| 81 | unset( $conds['page_namespace'] ); |
| 82 | |
| 83 | if ( count( $namespaces ) === 1 || !$dbr->unionSupportsOrderAndLimit() ) { |
| 84 | return parent::reallyDoQuery( $limit, $offset ); |
| 85 | } |
| 86 | |
| 87 | // Optimization: Fix slow query on MySQL in the case of multiple content namespaces, |
| 88 | // by rewriting this as a UNION of separate single namespace queries (T168010). |
| 89 | $sqb = $dbr->newSelectQueryBuilder() |
| 90 | ->select( isset( $query['fields'] ) ? (array)$query['fields'] : [] ) |
| 91 | ->tables( isset( $query['tables'] ) ? (array)$query['tables'] : [] ) |
| 92 | ->where( $conds ) |
| 93 | ->options( isset( $query['options'] ) ? (array)$query['options'] : [] ) |
| 94 | ->joinConds( isset( $query['join_conds'] ) ? (array)$query['join_conds'] : [] ); |
| 95 | if ( $limit !== false ) { |
| 96 | if ( $offset !== false ) { |
| 97 | // We need to increase the limit by the offset rather than |
| 98 | // using the offset directly, otherwise it'll skip incorrectly |
| 99 | // in the subqueries. |
| 100 | $sqb->limit( intval( $limit ) + intval( $offset ) ); |
| 101 | } else { |
| 102 | $sqb->limit( intval( $limit ) ); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | $order = $this->getOrderFields(); |
| 107 | if ( $this->sortDescending() ) { |
| 108 | foreach ( $order as &$field ) { |
| 109 | $field .= ' DESC'; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | $uqb = $dbr->newUnionQueryBuilder()->all(); |
| 114 | foreach ( $namespaces as $namespace ) { |
| 115 | $nsSqb = clone $sqb; |
| 116 | $nsSqb->orderBy( $order ); |
| 117 | $nsSqb->andWhere( [ 'page_namespace' => $namespace ] ); |
| 118 | $uqb->add( $nsSqb ); |
| 119 | } |
| 120 | |
| 121 | if ( $limit !== false ) { |
| 122 | $uqb->limit( intval( $limit ) ); |
| 123 | } |
| 124 | if ( $offset !== false ) { |
| 125 | $uqb->offset( intval( $offset ) ); |
| 126 | } |
| 127 | $orderBy = 'value'; |
| 128 | if ( $this->sortDescending() ) { |
| 129 | $orderBy .= ' DESC'; |
| 130 | } |
| 131 | $uqb->orderBy( $orderBy ); |
| 132 | return $uqb->caller( $fname )->fetchResultSet(); |
| 133 | } |
| 134 | |
| 135 | /** @inheritDoc */ |
| 136 | protected function getOrderFields() { |
| 137 | return [ 'page_len' ]; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * @param IReadableDatabase $db |
| 142 | * @param IResultWrapper $res |
| 143 | */ |
| 144 | public function preprocessResults( $db, $res ) { |
| 145 | $this->executeLBFromResultWrapper( $res ); |
| 146 | } |
| 147 | |
| 148 | /** @inheritDoc */ |
| 149 | protected function sortDescending() { |
| 150 | return false; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * @param Skin $skin |
| 155 | * @param stdClass $result Result row |
| 156 | * @return string |
| 157 | */ |
| 158 | public function formatResult( $skin, $result ) { |
| 159 | $title = Title::makeTitleSafe( $result->namespace, $result->title ); |
| 160 | if ( !$title ) { |
| 161 | return Html::element( 'span', [ 'class' => 'mw-invalidtitle' ], |
| 162 | Linker::getInvalidTitleDescription( $this->getContext(), $result->namespace, $result->title ) ); |
| 163 | } |
| 164 | |
| 165 | $linkRenderer = $this->getLinkRenderer(); |
| 166 | $hlink = $linkRenderer->makeKnownLink( |
| 167 | $title, |
| 168 | $this->msg( 'hist' )->text(), |
| 169 | [], |
| 170 | [ 'action' => 'history' ] |
| 171 | ); |
| 172 | $hlinkInParentheses = $this->msg( 'parentheses' )->rawParams( $hlink )->escaped(); |
| 173 | |
| 174 | if ( $this->isCached() ) { |
| 175 | $plink = $linkRenderer->makeLink( $title ); |
| 176 | $exists = $title->exists(); |
| 177 | } else { |
| 178 | $plink = $linkRenderer->makeKnownLink( $title ); |
| 179 | $exists = true; |
| 180 | } |
| 181 | $contentLanguage = $this->getContentLanguage(); |
| 182 | $bdiAttrs = [ |
| 183 | 'dir' => $contentLanguage->getDir(), |
| 184 | 'lang' => $contentLanguage->getHtmlCode(), |
| 185 | ]; |
| 186 | $plink = Html::rawElement( 'bdi', $bdiAttrs, $plink ); |
| 187 | $size = $this->msg( 'nbytes' )->numParams( $result->value )->escaped(); |
| 188 | $result = "{$hlinkInParentheses} {$plink} [{$size}]"; |
| 189 | |
| 190 | return $exists ? $result : Html::rawElement( 'del', [], $result ); |
| 191 | } |
| 192 | |
| 193 | /** @inheritDoc */ |
| 194 | protected function getGroupName() { |
| 195 | return 'maintenance'; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Retain the old class name for backwards compatibility. |
| 201 | * @deprecated since 1.41 |
| 202 | */ |
| 203 | class_alias( SpecialShortPages::class, 'SpecialShortPages' ); |