robot

type DefaultDelegate struct {
	P EventProcessor
}

type Delegate interface {
	HandleEvent(action string, fromState string, toState string) error
}

type Error interface {
	error
	BadEvent() string
	CurrentState() string
}

type EventProcessor interface {
	// OnExit Action handles exiting a state
	OnExit(fromState string)
	// Action is used to handle transitions
	Action(action string, fromState string, toState string) error
	// OnActionFailure failed to execute the Action
	OnActionFailure(action string, fromState string, toState string, err error)
	// OnExit Action handles entering a state
	OnEnter(toState string)
}

type StateMachine struct {
	sync.Mutex

	State    StateType   `json:"state"`
	PreState []StateType `json:"preState"`

	Transitions []Transition `json:"transitions"`
	// contains filtered or unexported fields
}

type StateType struct {
	State   string    `json:"state"`
	StartAt time.Time `json:"startAt"`
	EndAt   time.Time `json:"endAt"`
}

type Transition struct {
	From   string `json:"from"`
	Event  string `json:"event"`
	To     string `json:"to"`
	Action string `json:"action"`
}