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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | */ |
| 6 | |
| 7 | namespace MediaWiki\SpecialPage; |
| 8 | |
| 9 | use MediaWiki\Skin\Skin; |
| 10 | use MediaWiki\Title\Title; |
| 11 | use stdClass; |
| 12 | use Wikimedia\Rdbms\IReadableDatabase; |
| 13 | use Wikimedia\Rdbms\IResultWrapper; |
| 14 | |
| 15 | /** |
| 16 | * Base class for a "wanted" query page like WantedPages, WantedTemplates, etc |
| 17 | * |
| 18 | * @stable to extend |
| 19 | * @ingroup SpecialPage |
| 20 | */ |
| 21 | abstract class WantedQueryPage extends QueryPage { |
| 22 | /** @inheritDoc */ |
| 23 | public function isExpensive() { |
| 24 | return true; |
| 25 | } |
| 26 | |
| 27 | /** @inheritDoc */ |
| 28 | public function isSyndicated() { |
| 29 | return false; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * Cache page existence for performance |
| 34 | * @stable to override |
| 35 | * @param IReadableDatabase $db |
| 36 | * @param IResultWrapper $res |
| 37 | */ |
| 38 | protected function preprocessResults( $db, $res ) { |
| 39 | $this->executeLBFromResultWrapper( $res ); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Should formatResult() always check page existence, even if |
| 44 | * the results are fresh? This is a (hopefully temporary) |
| 45 | * kluge for Special:WantedFiles, which may contain false |
| 46 | * positives for files that exist e.g. in a shared repo (bug |
| 47 | * 6220). |
| 48 | * @stable to override |
| 49 | * @return bool |
| 50 | */ |
| 51 | protected function forceExistenceCheck() { |
| 52 | return false; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Format an individual result |
| 57 | * |
| 58 | * @stable to override |
| 59 | * |
| 60 | * @param Skin $skin Skin to use for UI elements |
| 61 | * @param stdClass $result Result row |
| 62 | * @return string |
| 63 | */ |
| 64 | public function formatResult( $skin, $result ) { |
| 65 | $linkRenderer = $this->getLinkRenderer(); |
| 66 | $title = Title::makeTitleSafe( $result->namespace, $result->title ); |
| 67 | if ( $title instanceof Title ) { |
| 68 | if ( $this->isCached() || $this->forceExistenceCheck() ) { |
| 69 | $pageLink = $this->existenceCheck( $title ) |
| 70 | ? '<del>' . $linkRenderer->makeLink( $title ) . '</del>' |
| 71 | : $linkRenderer->makeLink( $title ); |
| 72 | } else { |
| 73 | $pageLink = $linkRenderer->makeBrokenLink( $title ); |
| 74 | } |
| 75 | return $this->getLanguage()->specialList( $pageLink, $this->makeWlhLink( $title, $result ) ); |
| 76 | } else { |
| 77 | return $this->msg( 'wantedpages-badtitle', $result->title )->escaped(); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Does the Title currently exists |
| 83 | * |
| 84 | * This method allows a subclass to override this check |
| 85 | * (For example, wantedfiles, would want to check if the file exists |
| 86 | * not just that a page in the file namespace exists). |
| 87 | * |
| 88 | * This will only control if the link is crossed out. Whether or not the link |
| 89 | * is blue vs red is controlled by if the title exists. |
| 90 | * |
| 91 | * @note This will only be run if the page is cached (ie $wgMiserMode = true) |
| 92 | * unless forceExistenceCheck() is true. |
| 93 | * @since 1.24 |
| 94 | * @stable to override |
| 95 | * |
| 96 | * @param Title $title |
| 97 | * @return bool |
| 98 | */ |
| 99 | protected function existenceCheck( Title $title ) { |
| 100 | return $title->isKnown(); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Make a "what links here" link for a given title |
| 105 | * |
| 106 | * @param Title $title Title to make the link for |
| 107 | * @param stdClass $result Result row |
| 108 | * @return string |
| 109 | */ |
| 110 | protected function makeWlhLink( $title, $result ) { |
| 111 | $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() ); |
| 112 | $label = $this->msg( 'nlinks' )->numParams( $result->value )->text(); |
| 113 | return $this->getLinkRenderer()->makeLink( $wlh, $label ); |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Order by title for pages with the same number of links to them |
| 118 | * |
| 119 | * @stable to override |
| 120 | * @return array |
| 121 | * @since 1.29 |
| 122 | */ |
| 123 | protected function getOrderFields() { |
| 124 | return [ 'value DESC', 'namespace', 'title' ]; |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Do not order descending for all order fields. We will use DESC only on one field, see |
| 129 | * getOrderFields above. This overwrites sortDescending from QueryPage::getOrderFields(). |
| 130 | * Do NOT change this to true unless you remove the phrase DESC in getOrderFields above. |
| 131 | * If you do a database error will be thrown due to double adding DESC to query! |
| 132 | * |
| 133 | * @stable to override |
| 134 | * @return bool |
| 135 | * @since 1.29 |
| 136 | */ |
| 137 | protected function sortDescending() { |
| 138 | return false; |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Also use the order fields returned by getOrderFields when fetching from the cache. |
| 143 | * @stable to override |
| 144 | * @return array |
| 145 | * @since 1.29 |
| 146 | */ |
| 147 | protected function getCacheOrderFields() { |
| 148 | return $this->getOrderFields(); |
| 149 | } |
| 150 | |
| 151 | } |
| 152 | |
| 153 | /** @deprecated class alias since 1.41 */ |
| 154 | class_alias( WantedQueryPage::class, 'WantedQueryPage' ); |