MediaWikiPageLinkRenderer.php

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<?php
use MediaWiki\Linker\LinkTarget;

class MediaWikiPageLinkRenderer implements PageLinkRenderer {
    protected $formatter;

    protected $baseUrl;

    public function __construct( TitleFormatter $formatter, $baseUrl = null ) {
        if ( $baseUrl === null ) {
            $baseUrl = $GLOBALS['wgArticlePath'];
        }

        $this->formatter = $formatter;
        $this->baseUrl = $baseUrl;
    }

    public function getPageUrl( LinkTarget $page, $params = [] ) {
        // TODO: move the code from Linker::linkUrl here!
        // The below is just a rough estimation!

        $name = $this->formatter->getPrefixedText( $page );
        $name = str_replace( ' ', '_', $name );
        $name = wfUrlencode( $name );

        $url = $this->baseUrl . $name;

        if ( $params ) {
            $separator = ( strpos( $url, '?' ) ) ? '&' : '?';
            $url .= $separator . wfArrayToCgi( $params );
        }

        $fragment = $page->getFragment();
        if ( $fragment !== '' ) {
            $url = $url . '#' . wfUrlencode( $fragment );
        }

        return $url;
    }

    public function renderHtmlLink( LinkTarget $linkTarget, $text = null ) {
        if ( $text === null ) {
            $text = $this->formatter->getFullText( $linkTarget );
        }

        // TODO: move the logic implemented by Linker here,
        // using $this->formatter and $this->baseUrl, and
        // re-implement Linker to use a HtmlPageLinkRenderer.

        $title = Title::newFromLinkTarget( $linkTarget );
        $link = Linker::link( $title, htmlspecialchars( $text ) );

        return $link;
    }

    public function renderWikitextLink( LinkTarget $page, $text = null ) {
        if ( $text === null ) {
            $text = $this->formatter->getFullText( $page );
        }

        $name = $this->formatter->getFullText( $page );

        return '[[:' . $name . '|' . wfEscapeWikiText( $text ) . ']]';
    }
}