machine/model.go

// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package machine

type Modeler interface {
	Trigger(transition Transitioner) error
	ChangeState(target State) State
	InspectState() State
}

type Model struct {
	state State
}

func NewModel(initial State) Modeler {
	return &Model{state: initial}
}

func (m *Model) Trigger(transition Transitioner) error {
	return transition.Run(m)
}

func (m *Model) ChangeState(target State) State {
	oldState := m.state
	m.state = target
	return oldState
}

func (m *Model) InspectState() State {
	return m.state
}