chore: refactor error window (#2343)

Intersect.Client/Interface/Game/InputBox.cs

@@ -96,12 +96,12 @@ public InputBox(
         string prompt,
         bool modal,
         InputType inputType,
-        EventHandler onSuccess,
-        EventHandler onCancel,
-        object userData,
+        EventHandler? onSuccess,
+        EventHandler? onCancel = default,
+        object? userData = default,
         int quantity = 0,
         int maxQuantity = Int32.MaxValue,
-        Base parent = null,
+        Base? parent = null,
         GameContentManager.UI stage = GameContentManager.UI.InGame
     ) : base(parent)
     {

Intersect.Client/Interface/Interface.cs

@@ -7,7 +7,7 @@
 using Intersect.Client.General;
 using Intersect.Client.Interface.Game;
 using Intersect.Client.Interface.Menu;
-using Intersect.Client.Interface.Shared.Errors;
+using Intersect.Client.Interface.Shared;
 using Intersect.Configuration;
 
 using Base = Intersect.Client.Framework.Gwen.Renderer.Base;

Intersect.Client/Interface/Shared/ErrorWindow.cs

@@ -0,0 +1,69 @@
+using Intersect.Client.Framework.File_Management;
+using Intersect.Client.Framework.Gwen.Control;
+using Intersect.Client.Interface.Game;
+using Intersect.Client.Localization;
+
+namespace Intersect.Client.Interface.Shared;
+
+public partial class ErrorWindow
+{
+    private readonly List<InputBox> _errorWindows = [];
+
+    public ErrorWindow(Canvas gameCanvas, Canvas menuCanvas, string error, string header)
+    {
+        CreateErrorWindow(gameCanvas, error, header, GameContentManager.UI.InGame);
+        CreateErrorWindow(menuCanvas, error, header, GameContentManager.UI.Menu);
+    }
+
+    private void CreateErrorWindow(Canvas canvas, string error, string header, GameContentManager.UI stage)
+    {
+        var window = new InputBox(
+            title: header,
+            prompt: error,
+            modal: false,
+            inputType: InputBox.InputType.OkayOnly,
+            onSuccess: (sender, e) =>
+            {
+                foreach (var window in _errorWindows)
+                {
+                    window.Dispose();
+                }
+            },
+            maxQuantity: 0,
+            parent: canvas,
+            stage: stage
+        );
+
+        _errorWindows.Add(window);
+    }
+}
+
+public partial class ErrorHandler
+{
+    private readonly List<ErrorWindow> _windows = [];
+    private readonly Canvas _gameCanvas;
+    private readonly Canvas _menuCanvas;
+
+    public ErrorHandler(Canvas menuCanvas, Canvas gameCanvas)
+    {
+        _gameCanvas = gameCanvas;
+        _menuCanvas = menuCanvas;
+    }
+
+    public void Update()
+    {
+        while (Interface.TryDequeueErrorMessage(out var message))
+        {
+            _windows.Add(
+                new ErrorWindow(
+                    _gameCanvas,
+                    _menuCanvas,
+                    message.Value,
+                    string.IsNullOrWhiteSpace(message.Key) ? Strings.Errors.Title.ToString() : message.Key
+                )
+            );
+        }
+
+        _windows.Clear();
+    }
+}