Added CastingApp::ShutdownAllSubscriptions API

Author: sharadb-amazon

examples/tv-casting-app/tv-casting-common/core/CastingApp.cpp

@@ -20,6 +20,7 @@
 
 #include "support/ChipDeviceEventHandler.h"
 
+#include <app/InteractionModelEngine.h>
 #include <app/clusters/bindings/BindingManager.h>
 #include <app/server/Server.h>
 #include <credentials/DeviceAttestationCredsProvider.h>
@@ -133,6 +134,15 @@ CHIP_ERROR CastingApp::Stop()
     return CHIP_ERROR_NOT_IMPLEMENTED;
 }
 
+CHIP_ERROR CastingApp::ShutdownAllSubscriptions()
+{
+    VerifyOrReturnError(mState == CASTING_APP_RUNNING, CHIP_ERROR_INCORRECT_STATE);
+
+    chip::app::InteractionModelEngine::GetInstance()->ShutdownAllSubscriptions();
+
+    return CHIP_NO_ERROR;
+}
+
 }; // namespace core
 }; // namespace casting
 }; // namespace matter

examples/tv-casting-app/tv-casting-common/core/CastingApp.h

@@ -72,6 +72,11 @@ class CastingApp
      */
     bool isRunning() { return mState == CASTING_APP_RUNNING; }
 
+    /**
+     * @brief Tears down all active subscriptions.
+     */
+    CHIP_ERROR ShutdownAllSubscriptions();
+
 private:
     CastingApp();
     static CastingApp * _castingApp;