@rotorsoft/flow/tests/anonymous.js

A minimalistic state machine

module.exports = (state, scope, { params, actions }) => {
  const { name } = params
  return [
    actions.authenticate,
    function count({ counter = 0 }) {
      return [
        { say: `Please enter ${3 - counter} number(s)` },
        state => {
          const number = state.count.number
          return [
            { say: `You entered ${number}` },
            function check({ counter = 0 }) {
              if (isNaN(number)) return [{ say: 'which is not a number.' }, count]
              counter++
              if (counter < 3) return [{ say: `Got ${counter} number(s)`, counter }, count]
              return { say: 'Thank you.' }
            }
          ]
        }
      ]
    },
    function _return({ authenticate, verifyPhone, canComeToThePhone }) {
      const greet = { say: `Hello ${name}. How are you today?`, authenticated: true }

      if (authenticate.answer === 'yes') return greet
      if (verifyPhone && verifyPhone.answer === 'yes') {
        if (canComeToThePhone && canComeToThePhone.answer && canComeToThePhone.answer !== 'no') return greet
        return { say: `Hi. Please tell ${name} we will be calling back soon.` }
      }
      return { say: "I'm sorry for the inconvenience." }
    }
  ]
}