Prevent adding own host to host list

HyperbolicDownloaderApi/Commands/HostCommands.cs

@@ -155,7 +155,14 @@ public class HostCommands
                     newHosts++;
                 }
 
-                ApiManager.SendNotificationMessageNewLine($"Success! Added {newHosts} new host(s).", NotificationMessageType.Success);
+                if (newHosts > 0)
+                {
+                    ApiManager.SendNotificationMessageNewLine($"Added {newHosts} new host(s).", NotificationMessageType.Success);
+                }
+                else
+                {
+                    ApiManager.SendNotificationMessageNewLine($"No new hosts added.", NotificationMessageType.Warning);
+                }
             }
             else
             {

HyperbolicDownloaderApi/Networking/HostsManager.cs

@@ -29,11 +29,12 @@ public class HostsManager
 
     public bool Add(NetworkSocket host)
     {
-        if (!Contains(host))
+        if (!Contains(host) && !host.Equals(ApiManager.GetLocalSocket()))
         {
             hosts.Add(host);
             return true;
         }
+
         SaveHosts();
 
         return false;

HyperbolicDownloaderApi/Networking/NetworkSocket.cs

@@ -12,4 +12,19 @@ public class NetworkSocket
         Port = port;
         LastActive = lastActive;
     }
+
+    public override bool Equals(object? obj)
+    {
+        if (obj is not NetworkSocket networkSocket)
+        {
+            return false;
+        }
+
+        return networkSocket.IPAddress == IPAddress && networkSocket.Port == Port;
+    }
+
+    public override int GetHashCode()
+    {
+        return HashCode.Combine(IPAddress, Port);
+    }
 }