refactor(IController): Simplify controller interface

include/MantleAPI/Traffic/i_controller.h

@@ -16,27 +16,38 @@
 /** @file  i_controller.h */
 //-----------------------------------------------------------------------------
 
-#include "MantleAPI/Common/i_identifiable.h"
-
 #pragma once
 
+#include <optional>
+
+#include "MantleAPI/Common/i_identifiable.h"
+
 namespace mantle_api
 {
 /// Base interface for all controllers.
 class IController : public IIdentifiable
 {
 public:
-  /// Activates the controller for the lateral domain
-  virtual void ActivateLateral() = 0;
-
-  /// Deactivates the controller for the lateral domain
-  virtual void DeactivateLateral() = 0;
-
-  /// Activates the controller for the longitudinal domain
-  virtual void ActivateLongitudinal() = 0;
-
-  /// Deactivates the controller for the longitudinal domain
-  virtual void DeactivateLongitudinal() = 0;
+  /// Desired state of lateral domain
+  enum class LateralState
+  {
+    kNoChange = 0,
+    kActivate,
+    kDeactivate
+  };
+
+  /// Desired state of longitudinal domain
+  enum class LongitudinalState
+  {
+    kNoChange = 0,
+    kActivate,
+    kDeactivate
+  };
+
+  /// Change the state of a controller
+  /// @param parameter  lateral      New state of the lateral domain
+  /// @param parameter  longitudinal New state of the longituindal domain
+  virtual void ChangeState(LateralState lateral_state, LongitudinalState longitudinal_state) = 0;
 };
 
 }  // namespace mantle_api

test/MantleAPI/Test/test_utils.h

@@ -429,23 +429,8 @@ public:
               (const, override));
 
   MOCK_METHOD(void,
-              ActivateLateral,
-              (),
-              (override));
-
-  MOCK_METHOD(void,
-              DeactivateLateral,
-              (),
-              (override));
-
-  MOCK_METHOD(void,
-              ActivateLongitudinal,
-              (),
-              (override));
-
-  MOCK_METHOD(void,
-              DeactivateLongitudinal,
-              (),
+              ChangeState,
+              (mantle_api::IController::LateralState, mantle_api::IController::LongitudinalState),
               (override));
 };