ResourceLoaderLanguageDataModule.php

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<?php
class ResourceLoaderLanguageDataModule extends ResourceLoaderModule {

    protected $language;
    protected $targets = array( 'desktop', 'mobile' );
    protected function getSiteLangGrammarForms() {
        return $this->language->getGrammarForms();
    }

    protected function getPluralRules() {
        return $this->language->getPluralRules();
    }

    protected function getDigitGroupingPattern() {
        return $this->language->digitGroupingPattern();
    }

    protected function getDigitTransformTable() {
        return $this->language->digitTransformTable();
    }

    protected function getSeparatorTransformTable() {
        return $this->language->separatorTransformTable();
    }

    protected function getData() {
        return array(
            'digitTransformTable' => $this->getDigitTransformTable(),
            'separatorTransformTable' => $this->getSeparatorTransformTable(),
            'grammarForms' => $this->getSiteLangGrammarForms(),
            'pluralRules' => $this->getPluralRules(),
            'digitGroupingPattern' => $this->getDigitGroupingPattern(),
        );
    }

    public function getScript( ResourceLoaderContext $context ) {
        $this->language = Language::factory( $context->getLanguage() );
        return Xml::encodeJsCall( 'mw.language.setData', array(
            $this->language->getCode(),
            $this->getData()
        ) );
    }

    public function getModifiedTime( ResourceLoaderContext $context ) {
        return max( 1, $this->getHashMtime( $context ) );
    }

    public function getModifiedHash( ResourceLoaderContext $context ) {
        $this->language = Language::factory( $context->getLanguage() );

        return md5( serialize( $this->getData() ) );
    }

    public function getDependencies() {
        return array( 'mediawiki.language.init' );
    }
}