_{Spreadsheet with superpowers!}

Automata

A dart package to create Finite State Machines and State Charts following SCXML specification.

The main highlights of automata are:

• Declarative and type-based
• Compound states (nested states)
• Parallel states
• Initial states
• Guard conditions
• Eventless transitions
• Actions
• Invoke async services
• onEntry / onExit
• onTransition

Documentation

Check our wiki for a more in-depth documentation: https://github.com/rows/automata/wiki

Super quick start:

dart pub add automata

or

flutter pub add automata

import 'package:automata/automata.dart';

class Inactive extends AutomataState {}
class Active extends AutomataState {}
class OnToggle extends AutomataEvent {}

final machine = StateMachine.create(
  (g) => g
    ..initial<Inactive>()
    ..state<Inactive>(
      builder: (g) => g..on<OnToggle, Active>()
    )
    ..state<Active>(
      builder: (g) => g..on<OnToggle, Inactive>()
    ),
  onTransition: (e, value) => print(
    '''
    ## Transition::
    Received Event: $e
    Value: $value
    ''',
  ),
);

machine.send(OnToggle());

Credits

While developing this packages we were heavily inspired by Tinder's StateMachine, Stately's XState and the SCXML specification.