ADD: added waiting to getLatestMessage

src/DirectCommunicationClient.cpp

@@ -1,6 +1,7 @@
 #include <DirectCommunicationClient.hpp>
 
-
+#include <chrono>
+#include <thread>
 #include "zmq.hpp"
 #include <functional>
 #include <memory>
@@ -82,13 +83,38 @@ namespace DirectCommunication
 
     std::string  DirectCommunicationClient::getLatestMessage()
     {
+
+
         if (receivedMessages_.size() > 0) 
         {   
             std::string msg; 
             receivedMessages_.get(msg);
             return msg;
+        }else{
+            auto start = std::chrono::steady_clock::now();
+            while (receivedMessages_.size() == 0)
+            {
+                auto now =  std::chrono::steady_clock::now();
+                auto elapsed = duration_cast<std::chrono::milliseconds>(now - start);
+
+
+            if (elapsed >= std::chrono::milliseconds(5000)) { // replace 5000 with the number of milliseconds you want to wait
+
+                return "NULL";
+                break;
+
+            }
+                std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            }
+             std::string msg; 
+            receivedMessages_.get(msg);
+            return msg;
+            
+
         }
         return "NULL";
+
+
     }
 
     void DirectCommunicationClient::workerFunc_()