Makes Eyepatches Flippable (#26277)

Content.Client/Clothing/FlippableClothingVisualizerSystem.cs

@@ -0,0 +1,48 @@
+using Content.Shared.Clothing;
+using Content.Shared.Clothing.Components;
+using Content.Shared.Clothing.EntitySystems;
+using Content.Shared.Foldable;
+using Content.Shared.Item;
+using Robust.Client.GameObjects;
+
+namespace Content.Client.Clothing;
+
+public sealed class FlippableClothingVisualizerSystem  : VisualizerSystem<FlippableClothingVisualsComponent>
+{
+    [Dependency] private readonly SharedItemSystem _itemSys = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<FlippableClothingVisualsComponent, GetEquipmentVisualsEvent>(OnGetVisuals, after: [typeof(ClothingSystem)]);
+        SubscribeLocalEvent<FlippableClothingVisualsComponent, FoldedEvent>(OnFolded);
+    }
+
+    private void OnFolded(Entity<FlippableClothingVisualsComponent> ent, ref FoldedEvent args)
+    {
+        _itemSys.VisualsChanged(ent);
+    }
+
+    private void OnGetVisuals(Entity<FlippableClothingVisualsComponent> ent, ref GetEquipmentVisualsEvent args)
+    {
+        if (!TryComp(ent, out SpriteComponent? sprite) ||
+            !TryComp(ent, out ClothingComponent? clothing))
+            return;
+
+        if (clothing.MappedLayer == null ||
+            !AppearanceSystem.TryGetData<bool>(ent, FoldableSystem.FoldedVisuals.State, out var folding) ||
+            !sprite.LayerMapTryGet(folding ? ent.Comp.FoldingLayer : ent.Comp.UnfoldingLayer, out var idx))
+            return;
+
+        // add each layer to the visuals
+        var spriteLayer = sprite[idx];
+        foreach (var layer in args.Layers)
+        {
+            if (layer.Item1 != clothing.MappedLayer)
+                continue;
+
+            layer.Item2.Scale = spriteLayer.Scale;
+        }
+    }
+}