gistfile1.txt

export function translatedStringFromObject(localizedString: ?LocalizedString): ?string {
  if (!localizedString) return null;
  if (typeof localizedString === 'string') {
    return localizedString;
  }

  if (typeof localizedString === 'object') {
    const expandedLocalizedString = { ...localizedString };
    // add locales without country
    for (const underscoreLocale in localizedString) {
      const withoutCountry = localeWithoutCountry(underscoreLocale);
      expandedLocalizedString[withoutCountry] = expandedLocalizedString[underscoreLocale];
    }

    const locales = currentLocales;
    for (let i = 0; i < locales.length; i++) {
      const translatedString = expandedLocalizedString[locales[i]];
      if (translatedString) return translatedString;
    }

    const firstAvailableLocale = Object.keys(expandedLocalizedString)[0];
    return expandedLocalizedString[firstAvailableLocale]; // return the untranslated string as last option
  }
  return null;
}