fix: state clear

v1/state/state.go

@@ -11,8 +11,6 @@ var (
 	ErrKeyNotFound   = fmt.Errorf("state: key not found")
 )
 
-const ClearState State = "clear"
-
 type State string
 
 type Codec interface {
@@ -41,6 +39,7 @@ type Context struct {
 	state State
 	data  map[string][]byte
 	codec Codec
+	clear bool
 }
 
 type Option func(*Context)
@@ -83,10 +82,15 @@ func (sc *Context) Set(state State) {
 func (sc *Context) State() State { return sc.state }
 
 func (sc *Context) Clear() {
-	sc.state = ClearState
+	sc.state = ""
+	sc.clear = true
 	sc.data = make(map[string][]byte)
 }
 
+func (sc *Context) IsEmpty() bool {
+	return sc.state == "" && sc.clear
+}
+
 func (sc *Context) Store(key string, val any) error {
 	b, err := sc.codec.Marshal(val)
 	if err != nil {