carvalhoviniciusluiz / restify-devise

'use strict'

import assert from 'assert-plus'

import i18next from 'i18next'

import resources from './locales'

import acceptLanguage from 'accept-language'

// supported languages

export const languages = ['en-US', 'pt-BR']

i18next.init({

  lng: 'en-US',

  fallbackLng: languages,

  resources

})

i18next.handler = function () {

  return function (request, response, next) {

    request.i18n = i18next

    request.t = i18next.t.bind(i18next)

    return next()

  }

}

export default i18next

// sets the language by the header

export const changeLangRequest = function (request) {

  assert.object(request, 'request')

  assert.object(request.i18n, 'request.i18n')

  const { i18n } = request

  const language = request.headers['accept-language']

  i18n.changeLanguage(acceptLanguage.get(language))

  return i18n

}

// defines a language according to user settings

export const userLanguageObject = function (request) {

  assert.object(request, 'request')

  assert.object(request.user, 'request.user')

  const { user } = request

  assert.object(user.account, 'user.account')

  assert.ok(user.account.language, 'user.account.language')

  const language = user.account.language

  i18next.changeLanguage(acceptLanguage.get(language))

  return i18next

}