startersaas.pro-node-api-main/common/i18n.js

// common/i18n
import Polyglot from "node-polyglot";

import en from "../locales/en.js";
import it from "../locales/it.js";

const defaultLocale = process.env.DEFAULT_LOCALE;
const availableLocales = JSON.stringify(
  process.env.AVAILABLE_LOCALES.split(" ")
);

const phrases = {
  en: en,
  it: it,
};

const polyglot = new Polyglot({ defaultLocale, phrases });

class I18n {
  availableLocales() {
    return availableLocales;
  }

  t(key, interpolationOptions) {
    if (!interpolationOptions) interpolationOptions = {};
    return polyglot.t(`${polyglot.locale()}.${key}`, interpolationOptions);
  }

  __(key, interpolationOptions) {
    return this.t(key, interpolationOptions);
  }

  locale(lang) {
    if (lang) {
      polyglot.locale(lang);
    }
    return polyglot.locale();
  }

  phrases() {
    return phrases;
  }
}

export default new I18n();