SpecialNamespaceInfo.php

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<?php
 
namespace MediaWiki\Specials;
 
use MediaWiki\Html\Html;
use MediaWiki\Language\Language;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Title\NamespaceInfo;
 
class SpecialNamespaceInfo extends SpecialPage {
 
    public function __construct(
        private readonly NamespaceInfo $namespaceInfo,
        private readonly Language $contentLanguage
    ) {
        parent::__construct( 'NamespaceInfo' );
    }
 
    public function execute( $par ) {
        $this->setHeaders();
        $this->outputHeader();
 
        $out = $this->getOutput();
 
        $idHeading = Html::element(
            'th',
            [],
            $this->msg( 'namespaceinfo-heading-id' )->text()
        );
        $canonicalHeading = Html::element(
            'th',
            [],
            $this->msg( 'namespaceinfo-heading-canonical' )->text()
        );
        $localHeading = Html::element(
            'th',
            [],
            $this->msg( 'namespaceinfo-heading-local' )->text()
        );
        $aliasHeading = Html::element(
            'th',
            [],
            $this->msg( 'namespaceinfo-heading-aliases' )->text()
        );
        $infoHeading = Html::element(
            'th',
            [],
            $this->msg( 'namespaceinfo-heading-info' )->text()
        );
        $tableHeadingRow = Html::rawElement(
            'tr',
            [],
            $idHeading . $canonicalHeading . $localHeading . $aliasHeading . $infoHeading
        );
 
        $allAliases = $this->contentLanguage->getNamespaceAliases();
 
        $aliases = [];
        foreach ( $allAliases as $alias => $ns ) {
            $aliases[$ns][] = $alias;
        }
 
        $tableBodyRows = '';
        foreach ( $this->getContentLanguage()->getFormattedNamespaces() as $ns => $localName ) {
            $namespaceAliases = $aliases[$ns] ?? [];
            $tableBodyRows .= $this->makeNamespaceRow( $ns, $localName, $namespaceAliases );
        }
 
        $table = Html::rawElement(
            'table',
            [ 'class' => 'wikitable' ],
            $tableHeadingRow . $tableBodyRows
        );
 
        $out->addHtml( $table );
    }
 
    private function makeNamespaceRow( int $ns, string $localName, array $aliases = [] ): string {
        $canonicalName = $this->namespaceInfo->getCanonicalName( $ns );
        if ( $canonicalName ) {
            $canonicalName = strtr( $canonicalName, '_', ' ' );
        } else {
            $canonicalName = '';
        }
 
        // Special handling for main namespace
        if ( $ns === NS_MAIN ) {
            $localName = $this->msg( 'blanknamespace' )->escaped();
            $canonicalName = $this->msg( 'blanknamespace' )->inLanguage( 'en' )->escaped();
        }
 
        $description = $this->msg( 'namespaceinfo-description-ns' . $ns );
        if ( $description->isDisabled() ) {
            // Custom namespace with no message
 
            if ( $this->namespaceInfo->isTalk( $ns ) ) {
                $subjectNs = $this->namespaceInfo->getSubject( $ns );
                $subjectName = strtr(
                    $this->namespaceInfo->getCanonicalName( $subjectNs ),
                    '_',
                    ' '
                );
                $description = $this->msg( 'namespaceinfo-description-custom-talk',
                    $subjectName,
                    $subjectNs
                );
            } else {
                $description = $this->msg( 'namespaceinfo-description-custom', $localName );
            }
        }
        $descriptionText = $description->parse();
 
        $properties = [];
        if ( $ns >= NS_MAIN ) {
            // Don't talk about immovable namespaces for virtual NS_SPECIAL or NS_MEDIA
            $namespaceProtection = $this->getConfig()->get( 'NamespaceProtection' );
            if ( isset( $namespaceProtection[$ns] ) ) {
                $rightsNeeded = $namespaceProtection[$ns];
                if ( !is_array( $rightsNeeded ) ) {
                    $rightsNeeded = [ $rightsNeeded ];
                }
                foreach ( $rightsNeeded as $right ) {
                    $properties[] = $this->msg( 'namespaceinfo-namespace-protection-right', $right )
                        ->parse();
                }
            }
 
            if ( !$this->namespaceInfo->isMovable( $ns ) ) {
                $properties[] = $this->msg( 'namespaceinfo-namespace-immovable' )->parse();
            }
            if ( $this->namespaceInfo->isContent( $ns ) ) {
                $properties[] = $this->msg( 'namespaceinfo-namespace-iscontent' )->parse();
            }
            if ( $this->namespaceInfo->hasSubpages( $ns ) ) {
                $properties[] = $this->msg( 'namespaceinfo-namespace-subpages' )->parse();
            }
            if ( $this->namespaceInfo->isNonincludable( $ns ) ) {
                $properties[] = $this->msg( 'namespaceinfo-namespace-nonincludable' )->parse();
            }
            $contentModel = $this->namespaceInfo->getNamespaceContentModel( $ns );
            if ( $contentModel !== null ) {
                $properties[] = $this->msg( 'namespaceinfo-namespace-default-contentmodel' )
                    ->params( $contentModel )
                    ->parse();
            }
        }
 
        // Convert to a string
        $namespaceProperties = '';
        if ( $properties !== [] ) {
            $namespaceProperties = Html::openElement( 'ul' );
            foreach ( $properties as $propertyText ) {
                $namespaceProperties .= Html::rawElement(
                    'li',
                    [],
                    $propertyText
                );
            }
            $namespaceProperties .= Html::closeElement( 'ul' );
        }
 
        $namespaceAliases = '';
        if ( $aliases !== [] ) {
            if ( count( $aliases ) === 1 ) {
                $namespaceAliases = htmlspecialchars( str_replace( '_', ' ', $aliases[0] ) );
            } else {
                $namespaceAliases = Html::openElement( 'ul' );
                foreach ( $aliases as $alias ) {
                    // cleanup _ for display, since _ is only used internally and not for display
                    $alias = str_replace( "_", " ", $alias );
                    $namespaceAliases .= Html::element(
                        'li',
                        [],
                        $alias
                    );
                }
                $namespaceAliases .= Html::closeElement( 'ul' );
            }
 
        }
 
        $idField = Html::rawElement( 'td', [], (string)$ns );
        $canonicalField = Html::rawElement( 'td', [], $canonicalName );
        $localField = Html::rawElement( 'td', [], $localName );
        $aliasesField = Html::rawElement( 'td', [], $namespaceAliases );
        $infoField = Html::rawElement( 'td', [], $descriptionText . $namespaceProperties );
 
        return Html::rawElement(
            'tr',
            [],
            $idField . $canonicalField . $localField . $aliasesField . $infoField
        );
    }
 
    protected function getGroupName() {
        return 'wiki';
    }
 
}