subspace model

lib/utils/constants/action_enum.dart

@@ -0,0 +1,31 @@
+enum Action {
+  update,
+  add,
+  delete,
+}
+
+extension ActionExtension on Action {
+  String get value {
+    switch (this) {
+      case Action.update:
+        return 'update';
+      case Action.add:
+        return 'add';
+      case Action.delete:
+        return 'delete';
+    }
+  }
+
+  static Action fromValue(String value) {
+    switch (value) {
+      case 'update':
+        return Action.update;
+      case 'add':
+        return Action.add;
+      case 'delete':
+        return Action.delete;
+      default:
+        throw ArgumentError('Invalid action: $value');
+    }
+  }
+}