es6-module-test-user-module

es6-module-test-user-module.js

function hasProp (obj, prop) {
  return obj.hasOwnProperty(prop)
}

function hasProps (obj, props) {
  return props.filter(prop => hasProp(obj, prop)).length === props.length
}

function isString (value) {
  return typeof value === 'string'
}

function arePropsStrings (obj, props) {
  return props.filter(prop => isString(obj[prop])).length === props.length
}

// PUBLIC
function createUser (user) {
  const props = ['name', 'lastname']

  if (!hasProps(user, props) || !arePropsStrings(user, props)) {
    throw new Error('Wrong user data')
  }

  return {
    getName: () => user.name,
    getLastName: () => user.lastname,
    getFullName: () => user.name + ' ' + user.lastname
  }
}

module.exports = { createUser } // export outside only public function