Namespace StateMachine

Clones machine state

Drives a state machine.

Returns state transitions based on a list of strings. The last string is the terminal state. A -> B -> C -> D

Returns a machine description based on a list of strings. Machine can go back and forth between states: A <-> B <-> C <-> D

Initialises a state machine

const desc = {
 pants: ['shoes','socks'],
 socks: ['shoes', 'pants'],
 shoes: 'shirt',
 shirt: null

Copy

Returns true if MachineState sm is in its final state.

Returns true if toState is a valid transition from current state of sm

Returns a list of possible state names for sm, or an empty list if no transitions are possible.

Returns a list of possible state targets for sm, or an empty list if no transitions are possible.

Attempts to transition to a new state. Either a new MachineState is returned reflecting the change, or an exception is thrown.

A state machine that fires events when state changes.

Encapsulation of a 'running' machine description and state.

List of possible states

Possible state transitions, or null if final state.

Transition result

• 'Ok': transition valid
• 'FromNotFound': the from state is missing from machine definition
• 'ToNotFound': the 'to' state is missing from machine definition
• 'Invalid': not allowed to transition to target state from the current state
• 'Terminal': not allowed to transition because from state is the final state

Maps state to allowable next states