feat: add heartbeat capability

heartbeat.cpp

@@ -0,0 +1,48 @@
+/*********************************************************************
+* Copyright (c) Intel Corporation 2019 - 2020
+* SPDX-License-Identifier: Apache-2.0
+**********************************************************************/
+
+#include "heartbeat.h"
+#include <cpprest/ws_client.h>
+#include <cpprest/json.h>
+#include <cpprest/streams.h>
+#include <iostream>
+#include <string>
+#include "activation.h"
+#include "version.h"
+#include "commands.h"
+#include "network.h"
+#include "utils.h"
+
+bool heartbeat_create_response(std::string& response)
+{
+    web::json::value msg;
+
+    utility::string_t tmp = utility::conversions::convertstring("heartbeat_response");
+    msg[U("method")] = web::json::value::string(tmp);
+
+    tmp = utility::conversions::convertstring("");
+    msg[U("apiKey")] = web::json::value::string(tmp);
+
+    tmp = utility::conversions::convertstring(PROJECT_VER);
+    msg[U("appVersion")] = web::json::value::string(tmp);
+
+    tmp = utility::conversions::convertstring(PROTOCOL_VERSION);
+    msg[U("protocolVersion")] = web::json::value::string(tmp);
+
+    tmp = utility::conversions::convertstring("success");
+    msg[U("status")] = web::json::value::string(tmp);
+
+    tmp = utility::conversions::convertstring("");
+    msg[U("message")] = web::json::value::string(tmp);
+
+    // set empty payload
+    tmp = utility::conversions::convertstring("");
+    msg[U("payload")] = web::json::value::string(tmp);
+
+    // serialize the entire message
+    response = utility::conversions::to_utf8string(msg.serialize());
+
+    return true;
+}