Mood is an elegant state machine you can use to model large number of problems, among which are UI state management, communication protocol design, language parsing, artificial intelligence and other engineering applications.

• Finite state machine: Use mood to perform predetermined sequence of actions depending on a sequence of events with which they are presented.
• Asynchronous: Mood plays well with your favorite libraries and use promises to transition from one state to an other.

import mood from 'mood'
// add transitions from constructor
const door = mood('init', {
  'open' :
    ['lock', () => {
      // do something when the current state is 'open'
      // and on the 'lock' event
    },'locked'],
  'locked': [
    ['close', 'closed'],
    ['break', () => {
      // do something when the current state is 'locked'
      // and on the 'break' event
    }, 'open']
  ]
})
// add new transition
// if transition returns promise, wait for promise to be resolved to trigger state change
door.add('closed', 'knock', function () {
  return new Promise(resolve => setTimeout(resolve, 1000))
}, 'open')
// trigger open-lock transition
door.trigger('lock')
// trigger locked-break transition
door.trigger('break').then(state => {
  // do something with new state
})

Check out our API for more information.

npm install mood --save

The MIT License (MIT)

Copyright (c) 2016 Olivier Wietrich

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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