feat: set path as ID if it's empty

internal/model/obj.go

@@ -26,3 +26,7 @@ type URL interface {
 type Thumbnail interface {
 	Thumbnail() string
 }
+
+type SetID interface {
+	SetID(id string)
+}

internal/model/object.go

@@ -29,3 +29,7 @@ func (f Object) IsDir() bool {
 func (f Object) GetID() string {
 	return f.ID
 }
+
+func (f *Object) SetID(id string) {
+	f.ID = id
+}