Europa

Prescriptive Talos configuration helpers

Europa constrains the Talos model for state machines:

• State transitions are driven by an event stream
• Transitions conditions and actions are uniform with respect to the target state
• The context must be an initialized with a state property that’s an instance of an Observable
• The state includes forward and back properties to support forward and back transitions

If you don’t need or want these features, you should use Talos directly.

API

Machines are constructed using the make function by providing dictionaries for the states and transitions.

import Europa from "@dashkite/europa"

import transitions from "./transitions"
import states from "./states"

machine = Europa.make { states, transitions }

A machine can be started by providing the initial state, returning the event stream that drives it:

state = Observable.from forward: [], back: []
events = await Europa.start { state, machine }
events.enqueue name: "home"

States

TBD

Transitions

TBD

Navigation

TBD