wikimedia/mediawiki-extensions-Wikibase

<?php

namespace Wikibase\Lib;

use MediaWiki\Languages\LanguageNameUtils;
use MediaWiki\MediaWikiServices;

/**
 * Provide languages supported as content languages based on MediaWiki's LanguageNameUtils.
 *
 * @license GPL-2.0-or-later
 * @author Adrian Heine <adrian.heine@wikimedia.de>
 * @author Marius Hoch < hoo@online.de >
 */
class MediaWikiContentLanguages implements ContentLanguages {

    /** @var LanguageNameUtils */
    private $languageNameUtils;

    private string $languageNameUtilsInclude;

    /**
     * @var string[]|null Array of language codes => language names.
     */
    private $languageMap = null;

    /**
     * @param null|LanguageNameUtils $languageNameUtils
     * @param string $languageNameUtilsInclude Either LanguageNameUtils::DEFINED,
     *     LanguageNameUtils::ALL, or LanguageNameUtils::SUPPORTED.
     */
    public function __construct(
        ?LanguageNameUtils $languageNameUtils = null,
        string $languageNameUtilsInclude = LanguageNameUtils::DEFINED
    ) {
        $this->languageNameUtils = $languageNameUtils ?:
            MediaWikiServices::getInstance()->getLanguageNameUtils();
        $this->languageNameUtilsInclude = $languageNameUtilsInclude;
    }

    /**
     * @return string[] Array of language codes supported as content language
     */
    public function getLanguages() {
        return array_keys( $this->getLanguageMap() );
    }

    /**
     * @param string $languageCode
     *
     * @return bool
     */
    public function hasLanguage( $languageCode ) {
        return array_key_exists( $languageCode, $this->getLanguageMap() );
    }

    /**
     * @return string[] Array of language codes => language names.
     */
    private function getLanguageMap() {
        if ( $this->languageMap === null ) {
            $this->languageMap = $this->languageNameUtils->getLanguageNames( 'en', $this->languageNameUtilsInclude );
        }

        return $this->languageMap;
    }

}