eunomia-controller/source/react/intl/index.js

import { addLocaleData } from 'react-intl';

// Boiler Plate Reduction for the i18n
module.exports = (DEFAULT_LOCALE, locales) => {
  locales.map(locale => addLocaleData(locale.reactLocale))
  const appLocales = locales.map(locale => locale.locale)
  const formatTranslationMessages = (locale, messages) => {
    const selectedLocale = locales.filter(locale => locale.fallback === true)[0]
    const defaultFormattedMessages = locale !== DEFAULT_LOCALE ? formatTranslationMessages(DEFAULT_LOCALE, (typeof selectedLocale === 'undefined' ? locales[0] : selectedLocale).messages) : {};
    return Object.keys(messages).reduce((formattedMessages, key) => {
      const formattedMessage = !messages[key] && locale !== DEFAULT_LOCALE ? defaultFormattedMessages[key] : messages[key];
      return Object.assign(formattedMessages, { [key]: formattedMessage });
    }, {});
  }

  const translationMessages = () =>
  locales.map(locale => ({
    [locale.locale]: formatTranslationMessages(locale.locale, locale.messages)
  })).reduce((obj, value) => {
    Object.assign(obj, value);
    return obj
  }, {})

  return {
    appLocales: appLocales,
    formatTranslationMessages: formatTranslationMessages,
    translationMessages: translationMessages
  }
}