krsm

type Builder[S State, E Event] struct {
	// contains filtered or unexported fields
}

type Event interface {
	~string
	constraints.Ordered // if it is not used in a map then remove this
}

type Guard[S State, E Event] func(resource Resource[S, E]) bool

type Resource[S State, E Event] interface {
	GetNamespace() string
	GetName() string
	// CurrentState returns the current state of the resource. It should be set at initialization to the initial state.
	// It is the resource implementor's  responsibility to ensure this is concurrent safe.
	CurrentState() S
	// SetTransition records the given transition and also changes the current state of the resource.
	// It is the resource implementor's  responsibility to ensure this is concurrent safe.
	SetTransition(transition Transition[S, E])
}

type State interface {
	~string
	constraints.Ordered
}

type StateConfigurator[S State, E Event] interface {
	ConfigureState(state S) StateConfigurator[S, E]
	ConfigureSubState(subState S, parentState S) StateConfigurator[S, E]
	Target(targetState S, events ...E) StateConfigurator[S, E]
	TargetWithGuard(targetState S, event E, guardLabel string, guardPredicate Guard[S, E]) StateConfigurator[S, E]
	Build() (StateMachine[S, E], error)
}

type StateMachine[S State, E Event] interface {
	Name() string
	Trigger(event E, resource Resource[S, E], message string) (transition Transition[S, E], err error)
	States() sets.Set[S]
}

type Transition[S State, E Event] struct {
	CreatedTime       metav1.Time
	SourceState       S
	SourceParentState S
	Event             E
	TargetState       S
	TargetParentState S
	Message           string
}