Redial Button II - Now with magic! (#8237)

* Redial Button II - Now with magic!

* 15-second timer before redial is allowed

Content.Client/Launcher/ExtendedDisconnectInformationManager.cs

@@ -0,0 +1,45 @@
+using System;
+using Robust.Client;
+using Robust.Client.UserInterface;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.Network;
+
+namespace Content.Client.Launcher;
+
+/// <summary>
+/// So apparently the way that disconnect information is shipped around is really indirect.
+/// But honestly, given that content might have additional flags (i.e. hide disconnect button for bans)?
+/// This is responsible for collecting any extended disconnect information.
+/// </summary>
+public sealed class ExtendedDisconnectInformationManager
+{
+    [Dependency] private readonly IClientNetManager _clientNetManager = default!;
+
+    private NetDisconnectedArgs? _lastNetDisconnectedArgs = null;
+
+    public NetDisconnectedArgs? LastNetDisconnectedArgs
+    {
+        get => _lastNetDisconnectedArgs;
+        private set
+        {
+            _lastNetDisconnectedArgs = value;
+            LastNetDisconnectedArgsChanged?.Invoke(value);
+        }
+    }
+
+    // BE CAREFUL!
+    // This may fire at an arbitrary time before or after whatever code that needs it.
+    public event Action<NetDisconnectedArgs?>? LastNetDisconnectedArgsChanged;
+
+    public void Initialize()
+    {
+        _clientNetManager.Disconnect += OnNetDisconnect;
+    }
+
+    private void OnNetDisconnect(object? sender, NetDisconnectedArgs args)
+    {
+        LastNetDisconnectedArgs = args;
+    }
+}
+