Thinking about inheritance patterns in a new and modern wpcom.js

newWpcom.js

'use strict'
const l = m => console.log( m )
const s = m => l( attempt( () => JSON.stringify( m ) ) )
const attempt = f => { try { return f() } catch (e) { return null } }

const wpcom = (() => {
  const extender = a => Object.assign( {}, a, { extend: extend( a ) } )

  const reducer = base => ( prev, builder ) =>
    extender( Object.assign( {}, prev, builder( base ), { version: base.version + 1 } ) )

  const extend = base => builders =>
    [].concat( builders ).reduce( reducer( base ), base )

  const props = {
    version: 0,
  }

  return extend( props )( () => undefined )
})()

const poller = base => ( {
  poll: () => 'poll'
} )

const stopper = base => ( {
  stop: () => 'stop'
} )

const pair = wpcom.extend( [ poller, stopper ] )

const step = wpcom
  .extend( poller )
  .extend( stopper )

const pairStep = pair.extend( () => ( { step: wpcom.extend( stopper ) } ) )

l( pairStep )

const funny = wpcom.extend( () => ( {
  poll: () => 'haha',
  backup: pairStep
} ) )

l( funny )
l( funny.poll() )
l( funny.backup.poll() )