ResourceLoaderLanguageDataModule.php

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<?php
class ResourceLoaderLanguageDataModule extends ResourceLoaderFileModule {
 
    protected $targets = [ 'desktop', 'mobile' ];
 
    protected function getData( ResourceLoaderContext $context ) {
        $language = Language::factory( $context->getLanguage() );
        return [
            'digitTransformTable' => $language->digitTransformTable(),
            'separatorTransformTable' => $language->separatorTransformTable(),
            'minimumGroupingDigits' => $language->minimumGroupingDigits(),
            'grammarForms' => $language->getGrammarForms(),
            'grammarTransformations' => $language->getGrammarTransformations(),
            'pluralRules' => $language->getPluralRules(),
            'digitGroupingPattern' => $language->digitGroupingPattern(),
            'fallbackLanguages' => $language->getFallbackLanguages(),
            'bcp47Map' => LanguageCode::getNonstandardLanguageCodeMapping(),
        ];
    }
 
    public function getScript( ResourceLoaderContext $context ) {
        $fileScript = parent::getScript( $context );
        $langDataScript = Xml::encodeJsCall(
            'mw.language.setData',
            [
                $context->getLanguage(),
                $this->getData( $context )
            ],
            ResourceLoader::inDebugMode()
        );
        return $fileScript . $langDataScript;
    }
 
    public function enableModuleContentVersion() {
        return true;
    }
 
    public function supportsURLLoading() {
        return false;
    }
}