ResourceLoaderLanguageDataModule.php

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<?php
class ResourceLoaderLanguageDataModule extends ResourceLoaderModule {

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

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

        protected function getDigitTransformTable() {
                $digitTransformTable = $this->language->digitTransformTable();
                $separatorTransformTable = $this->language->separatorTransformTable();
                if ( $digitTransformTable ) {
                        array_merge( $digitTransformTable, (array)$separatorTransformTable );
                } else {
                        return $separatorTransformTable;
                }
                return $digitTransformTable;
        }

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

        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 ) {
                $this->language = Language::factory( $context ->getLanguage() );
                $cache = wfGetCache( CACHE_ANYTHING );
                $key = wfMemcKey( 'resourceloader', 'langdatamodule', 'changeinfo' );

                $data = $this->getData();
                $hash = md5( serialize( $data ) );

                $result = $cache->get( $key );
                if ( is_array( $result ) && $result['hash'] === $hash ) {
                        return $result['timestamp'];
                }
                $timestamp = wfTimestamp();
                $cache->set( $key, array(
                        'hash' => $hash,
                        'timestamp' => $timestamp,
                ) );
                return $timestamp;
        }

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