ExternalLinksTable.php

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<?php
 
namespace MediaWiki\Deferred\LinksUpdate;
 
use MediaWiki\ExternalLinks\LinkFilter;
use MediaWiki\Parser\ParserOutput;
 
class ExternalLinksTable extends LinksTable {
    private $newLinks = [];
    private $existingLinks;
 
    public function setParserOutput( ParserOutput $parserOutput ) {
        foreach ( $parserOutput->getExternalLinks() as $url => $unused ) {
            foreach ( LinkFilter::makeIndexes( $url ) as [ $domainIndex, $path ] ) {
                $this->newLinks[$domainIndex][$path] = true;
            }
        }
    }
 
    protected function getTableName() {
        return 'externallinks';
    }
 
    protected function getFromField() {
        return 'el_from';
    }
 
    protected function getExistingFields() {
        return [ 'el_to_domain_index', 'el_to_path' ];
    }
 
    private function getExistingLinks() {
        if ( $this->existingLinks === null ) {
            $this->existingLinks = [];
            foreach ( $this->fetchExistingRows() as $row ) {
                $this->existingLinks[$row->el_to_domain_index][$row->el_to_path ?? ''] = true;
            }
        }
        return $this->existingLinks;
    }
 
    protected function getNewLinkIDs() {
        foreach ( $this->newLinks as $domainIndex => $paths ) {
            foreach ( $paths as $path => $unused ) {
                yield [ (string)$domainIndex, (string)$path ];
            }
        }
    }
 
    protected function getExistingLinkIDs() {
        foreach ( $this->getExistingLinks() as $domainIndex => $paths ) {
            foreach ( $paths as $path => $unused ) {
                yield [ (string)$domainIndex, (string)$path ];
            }
        }
    }
 
    protected function isExisting( $linkId ) {
        [ $domainIndex, $path ] = $linkId;
        return isset( $this->getExistingLinks()[$domainIndex][$path] );
    }
 
    protected function isInNewSet( $linkId ) {
        [ $domainIndex, $path ] = $linkId;
        return isset( $this->newLinks[$domainIndex][$path] );
    }
 
    protected function insertLink( $linkId ) {
        [ $domainIndex, $path ] = $linkId;
        $params = [
            'el_to_domain_index' => substr( $domainIndex, 0, 255 ),
            'el_to_path' => $path,
        ];
        $this->insertRow( $params );
    }
 
    protected function deleteLink( $linkId ) {
        [ $domainIndex, $path ] = $linkId;
        $this->deleteRow( [
            'el_to_domain_index' => substr( $domainIndex, 0, 255 ),
            'el_to_path' => $path
        ] );
        if ( $path === '' ) {
            // el_to_path is nullable, but null is not valid in php arrays,
            // so both values are handled as one key, delete both rows when exists
            $this->deleteRow( [
                'el_to_domain_index' => substr( $domainIndex, 0, 255 ),
                'el_to_path' => null
            ] );
        }
    }
 
    public function getStringArray( $setType ) {
        $ids = $this->getLinkIDs( $setType );
        $stringArray = [];
        foreach ( $ids as $linkId ) {
            [ $domainIndex, $path ] = $linkId;
            $stringArray[] = LinkFilter::reverseIndexes( $domainIndex ) . $path;
        }
        return $stringArray;
    }
 
    protected function virtualDomain() {
        return self::VIRTUAL_DOMAIN;
    }
}