Function useStatebot

Example

 import m from 'mithril'
 import { withHooks as MithrilComponent } from 'mithril-hooks'

 import { Statebot } from 'statebot'
 import { useStatebot } from 'statebot/hooks/mithril'

 let loadMachine = Statebot('loader', {
   chart: `
     idle ->
       waiting ->
       loaded | failed ->
       idle
   `
 })

 loadMachine.performTransitions(({ emit }) => ({
   'idle -> waiting': {
     on: 'start-loading',
     then: () => {
       // Fail half the time for this demo
       let fail = Math.random() > 0.5
       setTimeout(() => {
         fail ? emit('error') : emit('success')
       }, 1000)
     }
   },
   'waiting -> loaded': {
     on: 'success'
   },
   'waiting -> failed': {
     on: 'error'
   }
 }))

 let { Enter, Emit, inState } = loadMachine

 let LoadingButton = MithrilComponent(() => {
   let state = useStatebot(loadMachine)

   return m(
     'button',
     {
       className: state,
       onclick: Emit('start-loading'),
       disabled: !inState('idle')
     },
     inState('idle', 'Load'),
     inState('waiting', 'Please wait...'),
     inState('loaded', 'Done!'),
     inState('failed', 'Whoops!')
   )
 })

 let ResetButton = MithrilComponent(() => {
   return m(
     'button',
     {
       onclick: Enter('idle')
     },
     'Reset'
   )
 })
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