LangLinksTable.php

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<?php
 
namespace MediaWiki\Deferred\LinksUpdate;
 
use ParserOutput;
 
class LangLinksTable extends LinksTable {
    private $newLinks = [];
    private $existingLinks;
 
    public function setParserOutput( ParserOutput $parserOutput ) {
        // Convert the format of the interlanguage links
        // I didn't want to change it in the ParserOutput, because that array is passed all
        // the way back to the skin, so either a skin API break would be required, or an
        // inefficient back-conversion.
        $ill = $parserOutput->getLanguageLinks();
        $this->newLinks = [];
        foreach ( $ill as $link ) {
            [ $key, $title ] = explode( ':', $link, 2 );
            $this->newLinks[$key] = $title;
        }
    }
 
    protected function getTableName() {
        return 'langlinks';
    }
 
    protected function getFromField() {
        return 'll_from';
    }
 
    protected function getExistingFields() {
        return [ 'll_lang', 'll_title' ];
    }
 
    protected function getNewLinkIDs() {
        foreach ( $this->newLinks as $key => $title ) {
            yield [ (string)$key, $title ];
        }
    }
 
    private function getExistingLinks() {
        if ( $this->existingLinks === null ) {
            $this->existingLinks = [];
            foreach ( $this->fetchExistingRows() as $row ) {
                $this->existingLinks[$row->ll_lang] = $row->ll_title;
            }
        }
        return $this->existingLinks;
    }
 
    protected function getExistingLinkIDs() {
        foreach ( $this->getExistingLinks() as $lang => $title ) {
            yield [ (string)$lang, $title ];
        }
    }
 
    protected function isExisting( $linkId ) {
        $links = $this->getExistingLinks();
        [ $lang, $title ] = $linkId;
        return \array_key_exists( $lang, $links )
            && $links[$lang] === $title;
    }
 
    protected function isInNewSet( $linkId ) {
        [ $lang, $title ] = $linkId;
        return \array_key_exists( $lang, $this->newLinks )
            && $this->newLinks[$lang] === $title;
    }
 
    protected function insertLink( $linkId ) {
        [ $lang, $title ] = $linkId;
        $this->insertRow( [
            'll_lang' => $lang,
            'll_title' => $title
        ] );
    }
 
    protected function deleteLink( $linkId ) {
        $this->deleteRow( [
            'll_lang' => $linkId[0]
        ] );
    }
}