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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Deferred\LinksUpdate; |
| 4 | |
| 5 | use MediaWiki\DAO\WikiAwareEntity; |
| 6 | use MediaWiki\Page\PageReferenceValue; |
| 7 | use MediaWiki\Parser\ParserOutput; |
| 8 | use MediaWiki\Title\Title; |
| 9 | use PurgeJobUtils; |
| 10 | |
| 11 | /** |
| 12 | * imagelinks |
| 13 | * |
| 14 | * Link ID format: string image name |
| 15 | * |
| 16 | * @since 1.38 |
| 17 | */ |
| 18 | class ImageLinksTable extends TitleLinksTable { |
| 19 | /** |
| 20 | * @var array New links with the name in the key, value arbitrary |
| 21 | */ |
| 22 | private $newLinks; |
| 23 | |
| 24 | /** |
| 25 | * @var array Existing links with the name in the key, value arbitrary |
| 26 | */ |
| 27 | private $existingLinks; |
| 28 | |
| 29 | public function setParserOutput( ParserOutput $parserOutput ) { |
| 30 | $this->newLinks = $parserOutput->getImages(); |
| 31 | } |
| 32 | |
| 33 | protected function getTableName() { |
| 34 | return 'imagelinks'; |
| 35 | } |
| 36 | |
| 37 | protected function getFromField() { |
| 38 | return 'il_from'; |
| 39 | } |
| 40 | |
| 41 | protected function getExistingFields() { |
| 42 | return [ 'il_to' ]; |
| 43 | } |
| 44 | |
| 45 | protected function getNewLinkIDs() { |
| 46 | foreach ( $this->newLinks as $link => $unused ) { |
| 47 | yield (string)$link; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Get existing links with the name in the key, value arbitrary. |
| 53 | * |
| 54 | * @return array |
| 55 | */ |
| 56 | private function getExistingLinks() { |
| 57 | if ( $this->existingLinks === null ) { |
| 58 | $this->existingLinks = []; |
| 59 | foreach ( $this->fetchExistingRows() as $row ) { |
| 60 | $this->existingLinks[$row->il_to] = true; |
| 61 | } |
| 62 | } |
| 63 | return $this->existingLinks; |
| 64 | } |
| 65 | |
| 66 | protected function getExistingLinkIDs() { |
| 67 | foreach ( $this->getExistingLinks() as $link => $unused ) { |
| 68 | yield (string)$link; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | protected function isExisting( $linkId ) { |
| 73 | return \array_key_exists( $linkId, $this->getExistingLinks() ); |
| 74 | } |
| 75 | |
| 76 | protected function isInNewSet( $linkId ) { |
| 77 | return \array_key_exists( $linkId, $this->newLinks ); |
| 78 | } |
| 79 | |
| 80 | protected function needForcedLinkRefresh() { |
| 81 | return $this->isCrossNamespaceMove(); |
| 82 | } |
| 83 | |
| 84 | protected function insertLink( $linkId ) { |
| 85 | $this->insertRow( [ |
| 86 | 'il_from_namespace' => $this->getSourcePage()->getNamespace(), |
| 87 | 'il_to' => $linkId |
| 88 | ] ); |
| 89 | } |
| 90 | |
| 91 | protected function deleteLink( $linkId ) { |
| 92 | $this->deleteRow( [ 'il_to' => $linkId ] ); |
| 93 | } |
| 94 | |
| 95 | protected function makePageReferenceValue( $linkId ): PageReferenceValue { |
| 96 | return new PageReferenceValue( NS_FILE, $linkId, WikiAwareEntity::LOCAL ); |
| 97 | } |
| 98 | |
| 99 | protected function makeTitle( $linkId ): Title { |
| 100 | return Title::makeTitle( NS_FILE, $linkId ); |
| 101 | } |
| 102 | |
| 103 | protected function deduplicateLinkIds( $linkIds ) { |
| 104 | if ( !is_array( $linkIds ) ) { |
| 105 | $linkIds = iterator_to_array( $linkIds ); |
| 106 | } |
| 107 | return array_unique( $linkIds ); |
| 108 | } |
| 109 | |
| 110 | protected function finishUpdate() { |
| 111 | // A update of namespace on cross namespace move is detected as insert + delete, |
| 112 | // but the updates are not needed there. |
| 113 | $allInsertedLinks = array_column( $this->insertedLinks, 0 ); |
| 114 | $allDeletedLinks = array_column( $this->deletedLinks, 0 ); |
| 115 | $insertedLinks = array_diff( $allInsertedLinks, $allDeletedLinks ); |
| 116 | $deletedLinks = array_diff( $allDeletedLinks, $allInsertedLinks ); |
| 117 | |
| 118 | $this->invalidateImageDescriptions( $insertedLinks, $deletedLinks ); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Invalidate all image description pages which had links added or removed |
| 123 | * @param array $insertedLinks |
| 124 | * @param array $deletedLinks |
| 125 | */ |
| 126 | private function invalidateImageDescriptions( array $insertedLinks, array $deletedLinks ) { |
| 127 | PurgeJobUtils::invalidatePages( |
| 128 | $this->getDB(), NS_FILE, |
| 129 | array_merge( $insertedLinks, $deletedLinks ) ); |
| 130 | } |
| 131 | } |