Add project files.

Hubs/ChatHub.cs

@@ -0,0 +1,39 @@
+using Microsoft.AspNetCore.SignalR;
+using Microsoft.EntityFrameworkCore;
+
+namespace LiveChat.Server.Hubs;
+
+public class ChatHub : Hub
+{
+    private readonly ChattingContext _context;
+    public override async Task OnConnectedAsync()
+    { 
+        using (var db = new ChattingContext())
+        {
+            var messages = db.Messages.ToList();
+
+            messages.ForEach(Console.WriteLine);
+
+            // Send the messages to the caller
+            await Clients.Caller.SendAsync("ReceiveMessages", messages);
+        }
+    }
+
+    public async Task SendMessage(string user, string message)
+    {
+        using (var db = new ChattingContext())
+        {
+            var messageData = new ChatMessage
+            {
+                User = user,
+                Message = message,
+            };
+            Console.WriteLine(messageData);
+            var dbSave = db.Messages.Add(messageData);
+            Console.WriteLine(dbSave);
+            await Clients.All.SendAsync("ReceiveMessage", user, message);
+            db.SaveChanges();
+        }
+	}
+}
+