SpecialVersion.php

Go to the documentation of this file.

<?php
namespace MediaWiki\Specials;
 
use Closure;
use HtmlArmor;
use MediaWiki\Config\Config;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Html\Html;
use MediaWiki\Language\Language;
use MediaWiki\Language\RawMessage;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Message\Message;
use MediaWiki\Parser\Parser;
use MediaWiki\Parser\ParserFactory;
use MediaWiki\Parser\ParserOutput;
use MediaWiki\Parser\ParserOutputFlags;
use MediaWiki\Parser\Sanitizer;
use MediaWiki\Registration\ExtensionRegistry;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Utils\ExtensionInfo;
use MediaWiki\Utils\GitInfo;
use MediaWiki\Utils\MWTimestamp;
use MediaWiki\Utils\UrlUtils;
use Symfony\Component\Yaml\Yaml;
use Wikimedia\Composer\ComposerInstalled;
use Wikimedia\Parsoid\Core\SectionMetadata;
use Wikimedia\Parsoid\Core\TOCData;
use Wikimedia\Rdbms\IConnectionProvider;
 
class SpecialVersion extends SpecialPage {
 
    protected $coreId = '';
 
    protected static $extensionTypes = false;
 
    protected $tocData;
 
    protected $tocIndex;
 
    protected $tocSection;
 
    protected $tocSubSection;
 
    private ParserFactory $parserFactory;
    private UrlUtils $urlUtils;
    private IConnectionProvider $dbProvider;
 
    public function __construct(
        ParserFactory $parserFactory,
        UrlUtils $urlUtils,
        IConnectionProvider $dbProvider
    ) {
        parent::__construct( 'Version' );
        $this->parserFactory = $parserFactory;
        $this->urlUtils = $urlUtils;
        $this->dbProvider = $dbProvider;
    }
 
    public static function getCredits( ExtensionRegistry $reg, Config $conf ): array {
        $credits = $conf->get( MainConfigNames::ExtensionCredits );
        foreach ( $reg->getAllThings() as $credit ) {
            $credits[$credit['type']][] = $credit;
        }
        return $credits;
    }
 
    public function execute( $par ) {
        $config = $this->getConfig();
        $credits = self::getCredits( ExtensionRegistry::getInstance(), $config );
 
        $this->setHeaders();
        $this->outputHeader();
        $out = $this->getOutput();
        $out->getMetadata()->setPreventClickjacking( false );
 
        // Explode the subpage information into useful bits
        $parts = explode( '/', (string)$par );
        $extNode = null;
        if ( isset( $parts[1] ) ) {
            $extName = str_replace( '_', ' ', $parts[1] );
            // Find it!
            foreach ( $credits as $extensions ) {
                foreach ( $extensions as $ext ) {
                    if ( isset( $ext['name'] ) && ( $ext['name'] === $extName ) ) {
                        $extNode = &$ext;
                        break 2;
                    }
                }
            }
            if ( !$extNode ) {
                $out->setStatusCode( 404 );
            }
        } else {
            $extName = 'MediaWiki';
        }
 
        // Now figure out what to do
        switch ( strtolower( $parts[0] ) ) {
            case 'credits':
                $out->addModuleStyles( 'mediawiki.special' );
 
                $wikiText = '{{int:version-credits-not-found}}';
                if ( $extName === 'MediaWiki' ) {
                    $wikiText = file_get_contents( MW_INSTALL_PATH . '/CREDITS' );
                    // Put the contributor list into columns
                    $wikiText = str_replace(
                        [ '<!-- BEGIN CONTRIBUTOR LIST -->', '<!-- END CONTRIBUTOR LIST -->' ],
                        [ '<div class="mw-version-credits">', '</div>' ],
                        $wikiText
                    );
                } elseif ( ( $extNode !== null ) && isset( $extNode['path'] ) ) {
                    $file = ExtensionInfo::getAuthorsFileName( dirname( $extNode['path'] ) );
                    if ( $file ) {
                        $wikiText = file_get_contents( $file );
                        if ( str_ends_with( $file, '.txt' ) ) {
                            $wikiText = Html::element(
                                'pre',
                                [
                                    'lang' => 'en',
                                    'dir' => 'ltr',
                                ],
                                $wikiText
                            );
                        }
                    }
                }
 
                $out->setPageTitleMsg( $this->msg( 'version-credits-title' )->plaintextParams( $extName ) );
                $out->addWikiTextAsInterface( $wikiText );
                break;
 
            case 'license':
                $out->setPageTitleMsg( $this->msg( 'version-license-title' )->plaintextParams( $extName ) );
 
                $licenseFound = false;
 
                if ( $extName === 'MediaWiki' ) {
                    $out->addWikiTextAsInterface(
                        file_get_contents( MW_INSTALL_PATH . '/COPYING' )
                    );
                    $licenseFound = true;
                } elseif ( ( $extNode !== null ) && isset( $extNode['path'] ) ) {
                    $files = ExtensionInfo::getLicenseFileNames( dirname( $extNode['path'] ) );
                    if ( $files ) {
                        $licenseFound = true;
                        foreach ( $files as $file ) {
                            $out->addWikiTextAsInterface(
                                Html::element(
                                    'pre',
                                    [
                                        'lang' => 'en',
                                        'dir' => 'ltr',
                                    ],
                                    file_get_contents( $file )
                                )
                            );
                        }
                    }
                }
                if ( !$licenseFound ) {
                    $out->addWikiTextAsInterface( '{{int:version-license-not-found}}' );
                }
                break;
 
            default:
                $out->addModuleStyles( 'mediawiki.special' );
 
                $out->addHTML( $this->getMediaWikiCredits() );
 
                $this->tocData = new TOCData();
                $this->tocIndex = 0;
                $this->tocSection = 0;
                $this->tocSubSection = 0;
 
                // Build the page contents (this also fills in TOCData)
                $sections = [
                    $this->softwareInformation(),
                    $this->getEntryPointInfo(),
                    $this->getSkinCredits( $credits ),
                    $this->getExtensionCredits( $credits ),
                    $this->getLibraries( $credits ),
                    $this->getParserTags(),
                    $this->getParserFunctionHooks(),
                    $this->getHooks(),
                    $this->IPInfo(),
                ];
 
                // Insert TOC first
                $pout = new ParserOutput;
                $pout->setTOCData( $this->tocData );
                $pout->setOutputFlag( ParserOutputFlags::SHOW_TOC );
                $pout->setRawText( Parser::TOC_PLACEHOLDER );
                $out->addParserOutput( $pout );
 
                // Insert contents
                foreach ( $sections as $content ) {
                    $out->addHTML( $content );
                }
 
                break;
        }
    }
 
    private function addTocSection( $labelMsg, $id ) {
        $this->tocIndex++;
        $this->tocSection++;
        $this->tocSubSection = 0;
        $this->tocData->addSection( new SectionMetadata(
            1,
            2,
            $this->msg( $labelMsg )->escaped(),
            $this->getLanguage()->formatNum( $this->tocSection ),
            (string)$this->tocIndex,
            null,
            null,
            $id,
            $id
        ) );
    }
 
    private function addTocSubSection( $label, $id ) {
        $this->tocIndex++;
        $this->tocSubSection++;
        $this->tocData->addSection( new SectionMetadata(
            2,
            3,
            htmlspecialchars( $label ),
            // See Parser::localizeTOC
            $this->getLanguage()->formatNum( $this->tocSection ) . '.' .
                $this->getLanguage()->formatNum( $this->tocSubSection ),
            (string)$this->tocIndex,
            null,
            null,
            $id,
            $id
        ) );
    }
 
    private function getMediaWikiCredits() {
        // No TOC entry for this heading, we treat it like the lede section
 
        $ret = Html::element(
            'h2',
            [ 'id' => 'mw-version-license' ],
            $this->msg( 'version-license' )->text()
        );
 
        $ret .= Html::rawElement( 'div', [ 'class' => 'plainlinks' ],
            $this->msg( new RawMessage( self::getCopyrightAndAuthorList() ) )->parseAsBlock() .
            Html::rawElement( 'div', [ 'class' => 'mw-version-license-info' ],
                $this->msg( 'version-license-info' )->parseAsBlock()
            )
        );
 
        return $ret;
    }
 
    public static function getCopyrightAndAuthorList() {
        if ( defined( 'MEDIAWIKI_INSTALL' ) ) {
            $othersLink = '[https://www.mediawiki.org/wiki/Special:Version/Credits ' .
                wfMessage( 'version-poweredby-others' )->plain() . ']';
        } else {
            $othersLink = '[[Special:Version/Credits|' .
                wfMessage( 'version-poweredby-others' )->plain() . ']]';
        }
 
        $translatorsLink = '[https://translatewiki.net/wiki/Translating:MediaWiki/Credits ' .
            wfMessage( 'version-poweredby-translators' )->plain() . ']';
 
        $authorList = [
            'Magnus Manske', 'Brooke Vibber', 'Lee Daniel Crocker',
            'Tim Starling', 'Erik Möller', 'Gabriel Wicke', 'Ævar Arnfjörð Bjarmason',
            'Niklas Laxström', 'Domas Mituzas', 'Rob Church', 'Yuri Astrakhan',
            'Aryeh Gregor', 'Aaron Schulz', 'Andrew Garrett', 'Raimond Spekking',
            'Alexandre Emsenhuber', 'Siebrand Mazeland', 'Chad Horohoe',
            'Roan Kattouw', 'Trevor Parscal', 'Bryan Tong Minh', 'Sam Reed',
            'Victor Vasiliev', 'Rotem Liss', 'Platonides', 'Antoine Musso',
            'Timo Tijhof', 'Daniel Kinzler', 'Jeroen De Dauw', 'Brad Jorsch',
            'Bartosz Dziewoński', 'Ed Sanders', 'Moriel Schottlender',
            'Kunal Mehta', 'James D. Forrester', 'Brian Wolff', 'Adam Shorland',
            'DannyS712', 'Ori Livneh', 'Max Semenik', 'Amir Sarabadani',
            'Derk-Jan Hartman', 'Petr Pchelko',
            $othersLink, $translatorsLink
        ];
 
        return wfMessage( 'version-poweredby-credits', MWTimestamp::getLocalInstance()->format( 'Y' ),
            Message::listParam( $authorList ) )->plain();
    }
 
    private function getSoftwareInformation() {
        $dbr = $this->dbProvider->getReplicaDatabase();
 
        // Put the software in an array of form 'name' => 'version'. All messages should
        // be loaded here, so feel free to use wfMessage in the 'name'. Wikitext
        // can be used both in the name and value.
        $software = [
            '[https://www.mediawiki.org/ MediaWiki]' => self::getVersionLinked(),
            '[https://php.net/ PHP]' => PHP_VERSION . " (" . PHP_SAPI . ")",
            '[https://icu.unicode.org/ ICU]' => INTL_ICU_VERSION,
            $dbr->getSoftwareLink() => $dbr->getServerInfo(),
        ];
 
        // T339915: If wikidiff2 is installed, show version
        if ( phpversion( "wikidiff2" ) ) {
            $software[ '[https://www.mediawiki.org/wiki/Wikidiff2 wikidiff2]' ] = phpversion( "wikidiff2" );
        }
 
        // Allow a hook to add/remove items.
        $this->getHookRunner()->onSoftwareInfo( $software );
 
        return $software;
    }
 
    private function softwareInformation() {
        $this->addTocSection( 'version-software', 'mw-version-software' );
 
        $out = Html::element(
            'h2',
            [ 'id' => 'mw-version-software' ],
            $this->msg( 'version-software' )->text()
        );
 
        $out .= Html::openElement( 'table', [ 'class' => 'wikitable plainlinks', 'id' => 'sv-software' ] );
 
        $out .= $this->getTableHeaderHtml( [
            $this->msg( 'version-software-product' )->text(),
            $this->msg( 'version-software-version' )->text()
        ] );
 
        foreach ( $this->getSoftwareInformation() as $name => $version ) {
            $out .= Html::rawElement(
                'tr',
                [],
                Html::rawElement( 'td', [], $this->msg( new RawMessage( $name ) )->parse() ) .
                    Html::rawElement( 'td', [ 'dir' => 'ltr' ], $this->msg( new RawMessage( $version ) )->parse() )
            );
        }
 
        $out .= Html::closeElement( 'table' );
 
        return $out;
    }
 
    public static function getVersion( $flags = '', $lang = null ) {
        $gitInfo = GitInfo::repo()->getHeadSHA1();
        if ( !$gitInfo ) {
            $version = MW_VERSION;
        } elseif ( $flags === 'nodb' ) {
            $shortSha1 = substr( $gitInfo, 0, 7 );
            $version = MW_VERSION . " ($shortSha1)";
        } else {
            $shortSha1 = substr( $gitInfo, 0, 7 );
            $msg = wfMessage( 'parentheses' );
            if ( $lang !== null ) {
                $msg->inLanguage( $lang );
            }
            $shortSha1 = $msg->params( $shortSha1 )->text();
            $version = MW_VERSION . ' ' . $shortSha1;
        }
 
        return $version;
    }
 
    public static function getVersionLinked() {
        return self::getVersionLinkedGit() ?: MW_VERSION;
    }
 
    private static function getMWVersionLinked() {
        $versionUrl = "";
        $hookRunner = new HookRunner( MediaWikiServices::getInstance()->getHookContainer() );
        if ( $hookRunner->onSpecialVersionVersionUrl( MW_VERSION, $versionUrl ) ) {
            $versionParts = [];
            preg_match( "/^(\d+\.\d+)/", MW_VERSION, $versionParts );
            $versionUrl = "https://www.mediawiki.org/wiki/MediaWiki_{$versionParts[1]}";
        }
 
        return '[' . $versionUrl . ' ' . MW_VERSION . ']';
    }
 
    private static function getVersionLinkedGit() {
        global $wgLang;
 
        $gitInfo = new GitInfo( MW_INSTALL_PATH );
        $headSHA1 = $gitInfo->getHeadSHA1();
        if ( !$headSHA1 ) {
            return false;
        }
 
        $shortSHA1 = '(' . substr( $headSHA1, 0, 7 ) . ')';
 
        $gitHeadUrl = $gitInfo->getHeadViewUrl();
        if ( $gitHeadUrl !== false ) {
            $shortSHA1 = "[$gitHeadUrl $shortSHA1]";
        }
 
        $gitHeadCommitDate = $gitInfo->getHeadCommitDate();
        if ( $gitHeadCommitDate ) {
            $shortSHA1 .= Html::element( 'br' ) . $wgLang->timeanddate( (string)$gitHeadCommitDate, true );
        }
 
        return self::getMWVersionLinked() . " $shortSHA1";
    }
 
    public static function getExtensionTypes(): array {
        if ( self::$extensionTypes === false ) {
            self::$extensionTypes = [
                'specialpage' => wfMessage( 'version-specialpages' )->text(),
                'editor' => wfMessage( 'version-editors' )->text(),
                'parserhook' => wfMessage( 'version-parserhooks' )->text(),
                'variable' => wfMessage( 'version-variables' )->text(),
                'media' => wfMessage( 'version-mediahandlers' )->text(),
                'antispam' => wfMessage( 'version-antispam' )->text(),
                'skin' => wfMessage( 'version-skins' )->text(),
                'api' => wfMessage( 'version-api' )->text(),
                'other' => wfMessage( 'version-other' )->text(),
            ];
 
            ( new HookRunner( MediaWikiServices::getInstance()->getHookContainer() ) )
                ->onExtensionTypes( self::$extensionTypes );
        }
 
        return self::$extensionTypes;
    }
 
    public static function getExtensionTypeName( $type ) {
        $types = self::getExtensionTypes();
 
        return $types[$type] ?? $types['other'];
    }
 
    private function getExtensionCredits( array $credits ) {
        $extensionTypes = self::getExtensionTypes();
 
        $this->addTocSection( 'version-extensions', 'mw-version-ext' );
 
        $out = Html::element(
            'h2',
            [ 'id' => 'mw-version-ext' ],
            $this->msg( 'version-extensions' )->text()
        );
 
        if (
            !$credits ||
            // Skins are displayed separately, see getSkinCredits()
            ( count( $credits ) === 1 && isset( $credits['skin'] ) )
        ) {
            $out .= Html::element(
                'p',
                [],
                $this->msg( 'version-extensions-no-ext' )->text()
            );
 
            return $out;
        }
 
        // Find all extensions that do not have a valid type and give them the type 'other'.
        $credits['other'] ??= [];
        foreach ( $credits as $type => $extensions ) {
            if ( !array_key_exists( $type, $extensionTypes ) ) {
                $credits['other'] = array_merge( $credits['other'], $extensions );
            }
        }
 
        // Loop through the extension categories to display their extensions in the list.
        foreach ( $extensionTypes as $type => $text ) {
            // Skins have a separate section
            if ( $type !== 'other' && $type !== 'skin' ) {
                $out .= $this->getExtensionCategory( $type, $text, $credits[$type] ?? [] );
            }
        }
 
        // We want the 'other' type to be last in the list.
        $out .= $this->getExtensionCategory( 'other', $extensionTypes['other'], $credits['other'] );
 
        return $out;
    }
 
    private function getSkinCredits( array $credits ) {
        $this->addTocSection( 'version-skins', 'mw-version-skin' );
 
        $out = Html::element(
            'h2',
            [ 'id' => 'mw-version-skin' ],
            $this->msg( 'version-skins' )->text()
        );
 
        if ( !isset( $credits['skin'] ) || !$credits['skin'] ) {
            $out .= Html::element(
                'p',
                [],
                $this->msg( 'version-skins-no-skin' )->text()
            );
 
            return $out;
        }
        $out .= $this->getExtensionCategory( 'skin', null, $credits['skin'] );
 
        return $out;
    }
 
    protected function getLibraries( array $credits ) {
        $this->addTocSection( 'version-libraries', 'mw-version-libraries' );
 
        $out = Html::element(
            'h2',
            [ 'id' => 'mw-version-libraries' ],
            $this->msg( 'version-libraries' )->text()
        );
 
        return $out
            . $this->getExternalLibraries( $credits )
            . $this->getClientSideLibraries();
    }
 
    protected function getExternalLibraries( array $credits ) {
        $paths = [
            MW_INSTALL_PATH . '/vendor/composer/installed.json'
        ];
 
        $extensionTypes = self::getExtensionTypes();
        foreach ( $extensionTypes as $type => $message ) {
            if ( !isset( $credits[$type] ) || $credits[$type] === [] ) {
                continue;
            }
            foreach ( $credits[$type] as $extension ) {
                if ( !isset( $extension['path'] ) ) {
                    continue;
                }
                $paths[] = dirname( $extension['path'] ) . '/vendor/composer/installed.json';
            }
        }
 
        $dependencies = [];
 
        foreach ( $paths as $path ) {
            if ( !file_exists( $path ) ) {
                continue;
            }
 
            $installed = new ComposerInstalled( $path );
 
            $dependencies += $installed->getInstalledDependencies();
        }
 
        if ( $dependencies === [] ) {
            return '';
        }
 
        ksort( $dependencies );
 
        $this->addTocSubSection( $this->msg( 'version-libraries-server' )->text(), 'mw-version-libraries-server' );
 
        $out = Html::element(
            'h3',
            [ 'id' => 'mw-version-libraries-server' ],
            $this->msg( 'version-libraries-server' )->text()
        );
        $out .= Html::openElement(
            'table',
            [ 'class' => 'wikitable plainlinks mw-installed-software', 'id' => 'sv-libraries' ]
        );
 
        $out .= $this->getTableHeaderHtml( [
            $this->msg( 'version-libraries-library' )->text(),
            $this->msg( 'version-libraries-version' )->text(),
            $this->msg( 'version-libraries-license' )->text(),
            $this->msg( 'version-libraries-description' )->text(),
            $this->msg( 'version-libraries-authors' )->text(),
        ] );
 
        foreach ( $dependencies as $name => $info ) {
            if ( !is_array( $info ) || str_starts_with( $info['type'], 'mediawiki-' ) ) {
                // Skip any extensions or skins since they'll be listed
                // in their proper section
                continue;
            }
            $authors = array_map( static function ( $arr ) {
                return new HtmlArmor( isset( $arr['homepage'] ) ?
                    Html::element( 'a', [ 'href' => $arr['homepage'] ], $arr['name'] ) :
                    htmlspecialchars( $arr['name'] )
                );
            }, $info['authors'] );
            $authors = $this->listAuthors( $authors, false, MW_INSTALL_PATH . "/vendor/$name" );
 
            // We can safely assume that the libraries' names and descriptions
            // are written in English and aren't going to be translated,
            // so set appropriate lang and dir attributes
            $out .= Html::openElement( 'tr', [
                // Add an anchor so docs can link easily to the version of
                // this specific library
                'id' => Sanitizer::escapeIdForAttribute(
                    "mw-version-library-$name"
                ) ] )
                . Html::rawElement(
                    'td',
                    [],
                    $this->getLinkRenderer()->makeExternalLink(
                        "https://packagist.org/packages/$name",
                        $name,
                        $this->getFullTitle(),
                        '',
                        [ 'class' => 'mw-version-library-name' ]
                    )
                )
                . Html::element( 'td', [ 'dir' => 'auto' ], $info['version'] )
                // @phan-suppress-next-line SecurityCheck-DoubleEscaped See FIXME in listToText
                . Html::element( 'td', [ 'dir' => 'auto' ], $this->listToText( $info['licenses'] ) )
                . Html::element( 'td', [ 'lang' => 'en', 'dir' => 'ltr' ], $info['description'] )
                . Html::rawElement( 'td', [], $authors )
                . Html::closeElement( 'tr' );
        }
        $out .= Html::closeElement( 'table' );
 
        return $out;
    }
 
    public static function parseForeignResources() {
        $registryDirs = [ 'MediaWiki' => MW_INSTALL_PATH . '/resources/lib' ]
            + ExtensionRegistry::getInstance()->getAttribute( 'ForeignResourcesDir' );
 
        $modules = [];
        foreach ( $registryDirs as $source => $registryDir ) {
            $foreignResources = Yaml::parseFile( "$registryDir/foreign-resources.yaml" );
            foreach ( $foreignResources as $name => $module ) {
                $key = $name . $module['version'];
                if ( isset( $modules[$key] ) ) {
                    $modules[$key]['source'][] = $source;
                    continue;
                }
                $modules[$key] = $module + [ 'name' => $name, 'source' => [ $source ] ];
            }
        }
        ksort( $modules );
        return $modules;
    }
 
    private function getClientSideLibraries() {
        $this->addTocSubSection( $this->msg( 'version-libraries-client' )->text(), 'mw-version-libraries-client' );
 
        $out = Html::element(
            'h3',
            [ 'id' => 'mw-version-libraries-client' ],
            $this->msg( 'version-libraries-client' )->text()
        );
        $out .= Html::openElement(
            'table',
            [ 'class' => 'wikitable plainlinks mw-installed-software', 'id' => 'sv-libraries-client' ]
        );
 
        $out .= $this->getTableHeaderHtml( [
            $this->msg( 'version-libraries-library' )->text(),
            $this->msg( 'version-libraries-version' )->text(),
            $this->msg( 'version-libraries-license' )->text(),
            $this->msg( 'version-libraries-authors' )->text(),
            $this->msg( 'version-libraries-source' )->text()
        ] );
 
        foreach ( self::parseForeignResources() as $name => $info ) {
            // We can safely assume that the libraries' names and descriptions
            // are written in English and aren't going to be translated,
            // so set appropriate lang and dir attributes
            $out .= Html::openElement( 'tr', [
                // Add an anchor so docs can link easily to the version of
                // this specific library
                'id' => Sanitizer::escapeIdForAttribute(
                    "mw-version-library-$name"
                ) ] )
                . Html::rawElement(
                    'td',
                    [],
                    $this->getLinkRenderer()->makeExternalLink(
                        $info['homepage'],
                        $info['name'],
                        $this->getFullTitle(),
                        '',
                        [ 'class' => 'mw-version-library-name' ]
                    )
                )
                . Html::element( 'td', [ 'dir' => 'auto' ], $info['version'] )
                . Html::element( 'td', [ 'dir' => 'auto' ], $info['license'] )
                . Html::element( 'td', [ 'dir' => 'auto' ], $info['authors'] ?? '—' )
                // @phan-suppress-next-line SecurityCheck-DoubleEscaped See FIXME in listToText
                . Html::element( 'td', [ 'dir' => 'auto' ], $this->listToText( $info['source'] ) )
                . Html::closeElement( 'tr' );
        }
        $out .= Html::closeElement( 'table' );
 
        return $out;
    }
 
    protected function getParserTags() {
        $tags = $this->parserFactory->getMainInstance()->getTags();
        if ( !$tags ) {
            return '';
        }
 
        $this->addTocSection( 'version-parser-extensiontags', 'mw-version-parser-extensiontags' );
 
        $out = Html::rawElement(
            'h2',
            [ 'id' => 'mw-version-parser-extensiontags' ],
            Html::rawElement(
                'span',
                [ 'class' => 'plainlinks' ],
                $this->getLinkRenderer()->makeExternalLink(
                    'https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Tag_extensions',
                    $this->msg( 'version-parser-extensiontags' ),
                    $this->getFullTitle()
                )
            )
        );
 
        array_walk( $tags, static function ( &$value ) {
            // Bidirectional isolation improves readability in RTL wikis
            $value = Html::rawElement(
                'bdi',
                // Prevent < and > from slipping to another line
                [
                    'style' => 'white-space: nowrap;',
                ],
                Html::element( 'code', [], "<$value>" )
            );
        } );
 
        $out .= $this->listToText( $tags );
 
        return $out;
    }
 
    protected function getParserFunctionHooks() {
        $funcHooks = $this->parserFactory->getMainInstance()->getFunctionHooks();
        if ( !$funcHooks ) {
            return '';
        }
 
        $this->addTocSection( 'version-parser-function-hooks', 'mw-version-parser-function-hooks' );
 
        $out = Html::rawElement(
            'h2',
            [ 'id' => 'mw-version-parser-function-hooks' ],
            Html::rawElement(
                'span',
                [ 'class' => 'plainlinks' ],
                $this->getLinkRenderer()->makeExternalLink(
                    'https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Parser_functions',
                    $this->msg( 'version-parser-function-hooks' ),
                    $this->getFullTitle()
                )
            )
        );
 
        $funcSynonyms = $this->parserFactory->getMainInstance()->getFunctionSynonyms();
        // This will give us the preferred synonyms in the content language, as if
        // we used MagicWord::getSynonym( 0 ), because they appear first in the arrays.
        // We can't use MagicWord directly, because only Parser knows whether a function
        // uses the leading "#" or not. Case-sensitive functions ("1") win over
        // case-insensitive ones ("0"), like in Parser::callParserFunction().
        // There should probably be a better API for this.
        $preferredSynonyms = array_flip( array_reverse( $funcSynonyms[1] + $funcSynonyms[0] ) );
        array_walk( $funcHooks, static function ( &$value ) use ( $preferredSynonyms ) {
            $value = $preferredSynonyms[$value];
        } );
 
        // Sort case-insensitively, ignoring the leading '#' if present
        usort( $funcHooks, static function ( $a, $b ) {
            return strcasecmp( ltrim( $a, '#' ), ltrim( $b, '#' ) );
        } );
 
        array_walk( $funcHooks, static function ( &$value ) {
            // Bidirectional isolation ensures it displays as {{#ns}} and not {{ns#}} in RTL wikis
            $value = Html::rawElement(
                'bdi',
                [],
                Html::element( 'code', [], '{{' . $value . '}}' )
            );
        } );
 
        $out .= $this->getLanguage()->listToText( $funcHooks );
 
        return $out;
    }
 
    protected function getExtensionCategory( $type, ?string $text, array $creditsGroup ) {
        $out = '';
 
        if ( $creditsGroup ) {
            $out .= $this->openExtType( $text, 'credits-' . $type );
 
            usort( $creditsGroup, [ $this, 'compare' ] );
 
            foreach ( $creditsGroup as $extension ) {
                $out .= $this->getCreditsForExtension( $type, $extension );
            }
 
            $out .= Html::closeElement( 'table' );
        }
 
        return $out;
    }
 
    public function compare( $a, $b ) {
        return $this->getLanguage()->lc( $a['name'] ) <=> $this->getLanguage()->lc( $b['name'] );
    }
 
    public function getCreditsForExtension( $type, array $extension ) {
        $out = $this->getOutput();
 
        // We must obtain the information for all the bits and pieces!
        // ... such as extension names and links
        if ( isset( $extension['namemsg'] ) ) {
            // Localized name of extension
            $extensionName = $this->msg( $extension['namemsg'] );
        } elseif ( isset( $extension['name'] ) ) {
            // Non localized version
            $extensionName = $extension['name'];
        } else {
            $extensionName = $this->msg( 'version-no-ext-name' );
        }
 
        if ( isset( $extension['url'] ) ) {
            $extensionNameLink = $this->getLinkRenderer()->makeExternalLink(
                $extension['url'],
                $extensionName,
                $this->getFullTitle(),
                '',
                [ 'class' => 'mw-version-ext-name' ]
            );
        } else {
            $extensionNameLink = htmlspecialchars( $extensionName );
        }
 
        // ... and the version information
        // If the extension path is set we will check that directory for GIT
        // metadata in an attempt to extract date and vcs commit metadata.
        $canonicalVersion = '&ndash;';
        $extensionPath = null;
        $vcsVersion = null;
        $vcsLink = null;
        $vcsDate = null;
 
        if ( isset( $extension['version'] ) ) {
            $canonicalVersion = $out->parseInlineAsInterface( $extension['version'] );
        }
 
        if ( isset( $extension['path'] ) ) {
            $extensionPath = dirname( $extension['path'] );
            if ( $this->coreId == '' ) {
                wfDebug( 'Looking up core head id' );
                $coreHeadSHA1 = GitInfo::repo()->getHeadSHA1();
                if ( $coreHeadSHA1 ) {
                    $this->coreId = $coreHeadSHA1;
                }
            }
            $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getInstance( CACHE_ANYTHING );
            $memcKey = $cache->makeKey(
                'specialversion-ext-version-text', $extension['path'], $this->coreId
            );
            [ $vcsVersion, $vcsLink, $vcsDate ] = $cache->get( $memcKey );
 
            if ( !$vcsVersion ) {
                wfDebug( "Getting VCS info for extension {$extension['name']}" );
                $gitInfo = new GitInfo( $extensionPath );
                $vcsVersion = $gitInfo->getHeadSHA1();
                if ( $vcsVersion !== false ) {
                    $vcsVersion = substr( $vcsVersion, 0, 7 );
                    $vcsLink = $gitInfo->getHeadViewUrl();
                    $vcsDate = $gitInfo->getHeadCommitDate();
                }
                $cache->set( $memcKey, [ $vcsVersion, $vcsLink, $vcsDate ], 60 * 60 * 24 );
            } else {
                wfDebug( "Pulled VCS info for extension {$extension['name']} from cache" );
            }
        }
 
        $versionString = Html::rawElement(
            'span',
            [ 'class' => 'mw-version-ext-version' ],
            $canonicalVersion
        );
 
        if ( $vcsVersion ) {
            if ( $vcsLink ) {
                $vcsVerString = $this->getLinkRenderer()->makeExternalLink(
                    $vcsLink,
                    $this->msg( 'version-version', $vcsVersion ),
                    $this->getFullTitle(),
                    '',
                    [ 'class' => 'mw-version-ext-vcs-version' ]
                );
            } else {
                $vcsVerString = Html::element( 'span',
                    [ 'class' => 'mw-version-ext-vcs-version' ],
                    "({$vcsVersion})"
                );
            }
            $versionString .= " {$vcsVerString}";
 
            if ( $vcsDate ) {
                $versionString .= ' ' . Html::element( 'span', [
                    'class' => 'mw-version-ext-vcs-timestamp',
                    'dir' => $this->getLanguage()->getDir(),
                ], $this->getLanguage()->timeanddate( $vcsDate, true ) );
            }
            $versionString = Html::rawElement( 'span',
                [ 'class' => 'mw-version-ext-meta-version' ],
                $versionString
            );
        }
 
        // ... and license information; if a license file exists we
        // will link to it
        $licenseLink = '';
        if ( isset( $extension['name'] ) ) {
            $licenseName = null;
            if ( isset( $extension['license-name'] ) ) {
                $licenseName = new HtmlArmor( $out->parseInlineAsInterface( $extension['license-name'] ) );
            } elseif ( $extensionPath !== null && ExtensionInfo::getLicenseFileNames( $extensionPath ) ) {
                $licenseName = $this->msg( 'version-ext-license' )->text();
            }
            if ( $licenseName !== null ) {
                $licenseLink = $this->getLinkRenderer()->makeLink(
                    $this->getPageTitle( 'License/' . $extension['name'] ),
                    $licenseName,
                    [
                        'class' => 'mw-version-ext-license',
                        'dir' => 'auto',
                    ]
                );
            }
        }
 
        // ... and generate the description; which can be a parameterized l10n message
        // in the form [ <msgname>, <parameter>, <parameter>... ] or just a straight
        // up string
        if ( isset( $extension['descriptionmsg'] ) ) {
            // Localized description of extension
            $descriptionMsg = $extension['descriptionmsg'];
 
            if ( is_array( $descriptionMsg ) ) {
                $descriptionMsgKey = array_shift( $descriptionMsg );
                $descriptionMsg = array_map( 'htmlspecialchars', $descriptionMsg );
                $description = $this->msg( $descriptionMsgKey, ...$descriptionMsg )->text();
            } else {
                $description = $this->msg( $descriptionMsg )->text();
            }
        } elseif ( isset( $extension['description'] ) ) {
            // Non localized version
            $description = $extension['description'];
        } else {
            $description = '';
        }
        $description = $out->parseInlineAsInterface( $description );
 
        // ... now get the authors for this extension
        $authors = $extension['author'] ?? [];
        // @phan-suppress-next-line PhanTypeMismatchArgumentNullable path is set when there is a name
        $authors = $this->listAuthors( $authors, $extension['name'], $extensionPath );
 
        // Finally! Create the table
        $html = Html::openElement( 'tr', [
                'class' => 'mw-version-ext',
                'id' => Sanitizer::escapeIdForAttribute( 'mw-version-ext-' . $type . '-' . $extension['name'] )
            ]
        );
 
        $html .= Html::rawElement( 'td', [], $extensionNameLink );
        $html .= Html::rawElement( 'td', [], $versionString );
        $html .= Html::rawElement( 'td', [], $licenseLink );
        $html .= Html::rawElement( 'td', [ 'class' => 'mw-version-ext-description' ], $description );
        $html .= Html::rawElement( 'td', [ 'class' => 'mw-version-ext-authors' ], $authors );
 
        $html .= Html::closeElement( 'tr' );
 
        return $html;
    }
 
    private function getHooks() {
        if ( !$this->getConfig()->get( MainConfigNames::SpecialVersionShowHooks ) ) {
            return '';
        }
 
        $hookContainer = MediaWikiServices::getInstance()->getHookContainer();
        $hookNames = $hookContainer->getHookNames();
 
        if ( !$hookNames ) {
            return '';
        }
 
        sort( $hookNames );
 
        $ret = [];
        $this->addTocSection( 'version-hooks', 'mw-version-hooks' );
        $ret[] = Html::element(
            'h2',
            [ 'id' => 'mw-version-hooks' ],
            $this->msg( 'version-hooks' )->text()
        );
        $ret[] = Html::openElement( 'table', [ 'class' => 'wikitable', 'id' => 'sv-hooks' ] );
        $ret[] = Html::openElement( 'tr' );
        $ret[] = Html::element( 'th', [], $this->msg( 'version-hook-name' )->text() );
        $ret[] = Html::element( 'th', [], $this->msg( 'version-hook-subscribedby' )->text() );
        $ret[] = Html::closeElement( 'tr' );
 
        foreach ( $hookNames as $name ) {
            $handlers = $hookContainer->getHandlerDescriptions( $name );
 
            $ret[] = Html::openElement( 'tr' );
            $ret[] = Html::element( 'td', [], $name );
            // @phan-suppress-next-line SecurityCheck-DoubleEscaped See FIXME in listToText
            $ret[] = Html::element( 'td', [], $this->listToText( $handlers ) );
            $ret[] = Html::closeElement( 'tr' );
        }
 
        $ret[] = Html::closeElement( 'table' );
 
        return implode( "\n", $ret );
    }
 
    private function openExtType( ?string $text = null, ?string $name = null ) {
        $out = '';
 
        $opt = [ 'class' => 'wikitable plainlinks mw-installed-software' ];
 
        if ( $name ) {
            $opt['id'] = "sv-$name";
        }
 
        $out .= Html::openElement( 'table', $opt );
 
        if ( $text !== null ) {
            $out .= Html::element( 'caption', [], $text );
        }
 
        if ( $name && $text !== null ) {
            $this->addTocSubSection( $text, "sv-$name" );
        }
 
        $firstHeadingMsg = ( $name === 'credits-skin' )
            ? 'version-skin-colheader-name'
            : 'version-ext-colheader-name';
 
        $out .= $this->getTableHeaderHtml( [
            $this->msg( $firstHeadingMsg )->text(),
            $this->msg( 'version-ext-colheader-version' )->text(),
            $this->msg( 'version-ext-colheader-license' )->text(),
            $this->msg( 'version-ext-colheader-description' )->text(),
            $this->msg( 'version-ext-colheader-credits' )->text()
        ] );
 
        return $out;
    }
 
    private function getTableHeaderHtml( $headers ): string {
        $out = '';
        $out .= Html::openElement( 'thead' );
        $out .= Html::openElement( 'tr' );
        foreach ( $headers as $header ) {
            $out .= Html::element( 'th', [ 'scope' => 'col' ], $header );
        }
        $out .= Html::closeElement( 'tr' );
        $out .= Html::closeElement( 'thead' );
        return $out;
    }
 
    private function IPInfo() {
        $ip = str_replace( '--', ' - ', htmlspecialchars( $this->getRequest()->getIP() ) );
 
        return "<!-- visited from $ip -->\n<span style='display:none'>visited from $ip</span>";
    }
 
    public function listAuthors( $authors, $extName, $extDir ): string {
        $hasOthers = false;
        $linkRenderer = $this->getLinkRenderer();
 
        $list = [];
        $authors = (array)$authors;
 
        // Special case: if the authors array has only one item and it is "...",
        // it should not be rendered as the "version-poweredby-others" i18n msg,
        // but rather as "version-poweredby-various" i18n msg instead.
        if ( count( $authors ) === 1 && $authors[0] === '...' ) {
            // Link to the extension's or skin's AUTHORS or CREDITS file, if there is
            // such a file; otherwise just return the i18n msg as-is
            if ( $extName && ExtensionInfo::getAuthorsFileName( $extDir ) ) {
                return $linkRenderer->makeLink(
                    $this->getPageTitle( "Credits/$extName" ),
                    $this->msg( 'version-poweredby-various' )->text()
                );
            } else {
                return $this->msg( 'version-poweredby-various' )->escaped();
            }
        }
 
        // Otherwise, if we have an actual array that has more than one item,
        // process each array item as usual
        foreach ( $authors as $item ) {
            if ( $item instanceof HtmlArmor ) {
                $list[] = HtmlArmor::getHtml( $item );
            } elseif ( $item === '...' ) {
                $hasOthers = true;
 
                if ( $extName && ExtensionInfo::getAuthorsFileName( $extDir ) ) {
                    $text = $linkRenderer->makeLink(
                        $this->getPageTitle( "Credits/$extName" ),
                        $this->msg( 'version-poweredby-others' )->text()
                    );
                } else {
                    $text = $this->msg( 'version-poweredby-others' )->escaped();
                }
                $list[] = $text;
            } elseif ( str_ends_with( $item, ' ...]' ) ) {
                $hasOthers = true;
                $list[] = $this->getOutput()->parseInlineAsInterface(
                    substr( $item, 0, -4 ) . $this->msg( 'version-poweredby-others' )->text() . "]"
                );
            } else {
                $list[] = $this->getOutput()->parseInlineAsInterface( $item );
            }
        }
 
        if ( $extName && !$hasOthers && ExtensionInfo::getAuthorsFileName( $extDir ) ) {
            $list[] = $linkRenderer->makeLink(
                $this->getPageTitle( "Credits/$extName" ),
                $this->msg( 'version-poweredby-others' )->text()
            );
        }
 
        return $this->listToText( $list, false );
    }
 
    private function listToText( array $list, bool $sort = true ): string {
        if ( !$list ) {
            return '';
        }
        if ( $sort ) {
            sort( $list );
        }
 
        return $this->getLanguage()
            ->listToText( array_map( [ __CLASS__, 'arrayToString' ], $list ) );
    }
 
    public static function arrayToString( $list ) {
        if ( is_array( $list ) && count( $list ) == 1 ) {
            $list = $list[0];
        }
        if ( $list instanceof Closure ) {
            // Don't output stuff like "Closure$;1028376090#8$48499d94fe0147f7c633b365be39952b$"
            return 'Closure';
        } elseif ( is_object( $list ) ) {
            return wfMessage( 'parentheses' )->params( get_class( $list ) )->escaped();
        } elseif ( !is_array( $list ) ) {
            return $list;
        } else {
            if ( is_object( $list[0] ) ) {
                $class = get_class( $list[0] );
            } else {
                $class = $list[0];
            }
 
            return wfMessage( 'parentheses' )->params( "$class, {$list[1]}" )->escaped();
        }
    }
 
    public static function getGitHeadSha1( $dir ) {
        wfDeprecated( __METHOD__, '1.41' );
        return ( new GitInfo( $dir ) )->getHeadSHA1();
    }
 
    public function getEntryPointInfo() {
        $config = $this->getConfig();
        $scriptPath = $config->get( MainConfigNames::ScriptPath ) ?: '/';
 
        $entryPoints = [
            'version-entrypoints-articlepath' => $config->get( MainConfigNames::ArticlePath ),
            'version-entrypoints-scriptpath' => $scriptPath,
            'version-entrypoints-index-php' => wfScript( 'index' ),
            'version-entrypoints-api-php' => wfScript( 'api' ),
            'version-entrypoints-rest-php' => wfScript( 'rest' ),
        ];
 
        $language = $this->getLanguage();
        $thAttributes = [
            'dir' => $language->getDir(),
            'lang' => $language->getHtmlCode(),
            'scope' => 'col'
        ];
 
        $this->addTocSection( 'version-entrypoints', 'mw-version-entrypoints' );
 
        $out = Html::element(
                'h2',
                [ 'id' => 'mw-version-entrypoints' ],
                $this->msg( 'version-entrypoints' )->text()
            ) .
            Html::openElement( 'table',
                [
                    'class' => 'wikitable plainlinks',
                    'id' => 'mw-version-entrypoints-table',
                    'dir' => 'ltr',
                    'lang' => 'en'
                ]
            ) .
            Html::openElement( 'thead' ) .
            Html::openElement( 'tr' ) .
            Html::element(
                'th',
                $thAttributes,
                $this->msg( 'version-entrypoints-header-entrypoint' )->text()
            ) .
            Html::element(
                'th',
                $thAttributes,
                $this->msg( 'version-entrypoints-header-url' )->text()
            ) .
            Html::closeElement( 'tr' ) .
            Html::closeElement( 'thead' );
 
        foreach ( $entryPoints as $message => $value ) {
            $url = $this->urlUtils->expand( $value, PROTO_RELATIVE );
            $out .= Html::openElement( 'tr' ) .
                Html::rawElement( 'td', [], $this->msg( $message )->parse() ) .
                Html::rawElement( 'td', [],
                    Html::rawElement(
                        'code',
                        [],
                        $this->msg( new RawMessage( "[$url $value]" ) )->parse()
                    )
                ) .
                Html::closeElement( 'tr' );
        }
 
        $out .= Html::closeElement( 'table' );
 
        return $out;
    }
 
    protected function getGroupName() {
        return 'wiki';
    }
}
 
class_alias( SpecialVersion::class, 'SpecialVersion' );