ask.js

const ask = (questions, end) => (response, convo) => {
  let responses = {}

  const $ask = (questions) => {
    const {id, question, validate} = questions.shift()

    convo.ask(question, (response, convo) => {
      try {
        responses[id] = response
        typeof validate === 'function' && validate(response, responses)
        if (questions.length === 0)
          convo.say(end(responses))
        else
          $ask(questions)
      } catch (err) {
        convo.say(err.message)
      } finally {
        convo.next()
      }
    })
  }

  $ask(questions)
}

module.exports = {ask}