added template for receiving json chat message

Server/Models/ServerClient.cs

@@ -86,16 +86,23 @@ namespace Server.Models
         {
             Debug.WriteLine($"Got message from {Username} : {message}");
             byte id = message[0];
+            byte[] payload = new byte[message.Length - 1];
+            Array.Copy(message,1,payload,0,message.Length-1);
             switch(id)
             {
                 case 0x01:
                     // canvas data
                     break;
                 case 0x02:
-                    // message data
+                    // json message data
+                    (string, string) combo = JSONConvert.GetUsernameAndMessage(payload);
+                    string textUsername = combo.Item1;
+                    string textMsg = combo.Item2;
+                    // todo handle sending to all except this user the username and message to display in chat
                     break;
+
                 case 0x03:
-                    // json data
+                    // object data
                     break;
                 default:
                     Debug.WriteLine("Received weird identifier: " + id);

Server/Models/ServerCommunication.cs

@@ -85,5 +85,13 @@ namespace Server.Models
                 sc.sendMessage(message);
             }
         }
+
+        public void sendToAllExcept(string username, byte[] message)
+        {
+            foreach (ServerClient sc in serverClients)
+            {
+                if (sc.Username != username) sc.sendMessage(message);
+            }
+        }
     }
 }

Server/Server.csproj

@@ -11,6 +11,7 @@
   <ItemGroup>
     <PackageReference Include="AsyncAwaitBestPractices" Version="4.3.0" />
     <PackageReference Include="MvvmLightLibs" Version="5.4.1.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="PropertyChanged.Fody" Version="3.2.9" />
   </ItemGroup>
 

SharedClientServer/JSONConvert.cs

@@ -0,0 +1,17 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SharedClientServer
+{
+    class JSONConvert
+    {
+        public static (string,string) GetUsernameAndMessage(byte[] json)
+        {
+            string msg = Encoding.ASCII.GetString(json);
+            dynamic payload = JsonConvert.DeserializeObject(msg);
+            return (payload.username, payload.message);
+        }
+    }
+}

SharedClientServer/SharedClientServer.projitems

@@ -10,6 +10,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)ClientServerUtil.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)JSONConvert.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ObservableObject.cs" />
   </ItemGroup>
 </Project>