Selectable Bar Signs (#29068)

* make bar sign selectable

* ajcm strongest soldier

* AJCM comes down hard for round 2

* good shit

* ok ballin

* bless'ed be the webedit

Content.Client/BarSign/Ui/BarSignMenu.xaml.cs

@@ -0,0 +1,50 @@
+using Content.Client.UserInterface.Controls;
+using Content.Shared.BarSign;
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.XAML;
+
+namespace Content.Client.BarSign.Ui;
+
+[GenerateTypedNameReferences]
+public sealed partial class BarSignMenu : FancyWindow
+{
+    private string? _currentId;
+
+    private readonly List<BarSignPrototype> _cachedPrototypes = new();
+
+    public event Action<string>? OnSignSelected;
+
+    public BarSignMenu(BarSignPrototype? currentSign, List<BarSignPrototype> signs)
+    {
+        RobustXamlLoader.Load(this);
+        _currentId = currentSign?.ID;
+
+        _cachedPrototypes.Clear();
+        _cachedPrototypes = signs;
+        foreach (var proto in _cachedPrototypes)
+        {
+            SignOptions.AddItem(Loc.GetString(proto.Name));
+        }
+
+        SignOptions.OnItemSelected += idx =>
+        {
+            OnSignSelected?.Invoke(_cachedPrototypes[idx.Id].ID);
+            SignOptions.SelectId(idx.Id);
+        };
+
+        if (currentSign != null)
+        {
+            var idx = _cachedPrototypes.IndexOf(currentSign);
+            SignOptions.TrySelectId(idx);
+        }
+    }
+
+    public void UpdateState(BarSignPrototype newSign)
+    {
+        if (_currentId != null && newSign.ID == _currentId)
+            return;
+        _currentId = newSign.ID;
+        var idx = _cachedPrototypes.IndexOf(newSign);
+        SignOptions.TrySelectId(idx);
+    }
+}