Fixing issue with error on sending message with conversation ID and empty system node

Author: mediumTaj

Examples/ServiceExamples/Scripts/ExampleConversation.cs

@@ -20,12 +20,14 @@
 using IBM.Watson.DeveloperCloud.Services.Conversation.v1;
 using IBM.Watson.DeveloperCloud.Utilities;
 using IBM.Watson.DeveloperCloud.Logging;
+using System;
 
 public class ExampleConversation : MonoBehaviour
 {
 	private Conversation m_Conversation = new Conversation();
     private string m_WorkspaceID;
 	private string m_Input = "Can you unlock the door?";
+    private string m_ConversationID;
 
 	void Start () {
         LogSystem.InstallDefaultReactors();
@@ -42,7 +44,9 @@ void Start () {
 
         //  Message by passing input, alternate intents and conversationID
         m_Conversation.Message(OnMessage, m_WorkspaceID, m_Input, false, null);
-	}
+
+        Converse("is there traffic today?");
+    }
 
 	void OnMessage (MessageResponse resp, string customData)
 	{
@@ -54,10 +58,21 @@ void OnMessage (MessageResponse resp, string customData)
             if(resp.output != null && resp.output.text.Length > 0)
                 foreach(string txt in resp.output.text)
     		        Debug.Log("output: " + txt);
+
+            m_ConversationID = resp.context.conversation_id;
+            
         }
         else
         {
             Debug.Log("Failed to invoke Message();");
         }
 	}
+
+    private void Converse(string input)
+    {
+        if (string.IsNullOrEmpty(input))
+            throw new ArgumentNullException("input");
+
+        m_Conversation.Message(OnMessage, m_WorkspaceID, input, true, m_ConversationID);
+    }
 }

Examples/ServiceExamples/ServiceExamples.unity

@@ -352,7 +352,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!114 &859102723
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -593,7 +593,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!114 &1713392458
 MonoBehaviour:
   m_ObjectHideFlags: 0

Scripts/Services/Conversation/Conversation.cs

@@ -135,29 +135,20 @@ public class Conversation : IWatsonService
             if (callback == null)
                 throw new ArgumentNullException("callback");
 
-            MessageRequest messageRequest = new MessageRequest();
-            messageRequest.inputText = input;
-            messageRequest.alternate_intents = useAlternateIntents;
-            if (conversationID != default(string))
-                messageRequest.conversationID = conversationID;
-
             RESTConnector connector = RESTConnector.GetConnector(SERVICE_ID, SERVICE_MESSAGE);
             if (connector == null)
                 return false;
 
-            fsData data;
-            sm_Serializer.TrySerialize(messageRequest.GetType(), messageRequest, out data).AssertSuccessWithoutWarnings();
-            string reqString = fsJsonPrinter.CompressedJson(data);
+            string reqJson = "{\"input\":{\"text\":\"" + input + "\"},\"alternate_intents\":" + useAlternateIntents.ToString().ToLower() + ",\"context\":{\"conversation_id\":\"" + conversationID + "\"}}";
 
             MessageReq req = new MessageReq();
             req.Callback = callback;
-            req.MessageRequest = messageRequest;
             req.Headers["Content-Type"] = "application/json";
             req.Headers["Accept"] = "application/json";
             req.Parameters["version"] = Version.VERSION;
             req.Function = "/" + workspaceID + "/message";
             req.Data = customData;
-            req.Send = Encoding.UTF8.GetBytes(reqString);
+            req.Send = Encoding.UTF8.GetBytes(reqJson);
             req.OnResponse = MessageResp;
 
             return connector.Send(req);