feature: add registration for connection change events

languages/cpp/templates/sdk/include/firebolt.h

@@ -88,6 +88,29 @@ struct IFireboltAccessor {
      */
     virtual Firebolt::Error Connect ( OnConnectionChanged listener ) = 0;
 
+    /**
+     * @brief Register a callback for any changes in the connection to the endpoint. Only a single callback is supported.
+     *
+     * @param listener Connection status listener
+     *
+     * @return None
+     */
+    virtual void RegisterConnectionChangeListener ( OnConnectionChanged listener ) = 0;
+
+    /**
+     * @brief Unregister previously registered callback.
+     *
+     * @return None
+     */
+    virtual void UnregisterConnnectionChangeListener ( ) = 0;
+
+    /**
+     * @brief Returs whether there is a connection to the endpoint
+     *
+     * @return bool
+     */
+    virtual bool IsConnected ( ) const = 0;
+
     /**
      * @brief Disconnects from the Websocket endpoint.
      * 

languages/cpp/templates/sdk/src/firebolt.cpp

@@ -89,6 +89,21 @@ namespace Firebolt {
             return _accessor->Connect(listener);
         }
 
+        void RegisterConnectionChangeListener( OnConnectionChanged listener ) override
+        {
+            return _accessor->RegisterConnectionChangeListener(listener);
+        }
+
+        void UnregisterConnnectionChangeListener() override
+        {
+            _accessor->UnregisterConnnectionChangeListener();
+        }
+
+        bool IsConnected() const override
+        {
+            return _accessor->IsConnected();
+        }
+
         Firebolt::Error Disconnect() override
         {
             return _accessor->Disconnect();