Re-organize all projects (#4166)

Content.Client/MachineLinking/SignalSwitchVisualizer.cs

@@ -0,0 +1,42 @@
+using Content.Shared.MachineLinking;
+using JetBrains.Annotations;
+using Robust.Client.GameObjects;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Client.MachineLinking
+{
+    [UsedImplicitly]
+    public class SignalSwitchVisualizer : AppearanceVisualizer
+    {
+        [DataField("layer")]
+        private int Layer { get; }
+
+        public override void InitializeEntity(IEntity entity)
+        {
+            base.InitializeEntity(entity);
+
+            if (entity.TryGetComponent(out SpriteComponent? sprite))
+            {
+                sprite.LayerMapReserveBlank(Layer);
+            }
+        }
+
+        public override void OnChangeData(AppearanceComponent component)
+        {
+            base.OnChangeData(component);
+
+            if (!component.Owner.TryGetComponent(out SpriteComponent? sprite))
+            {
+                return;
+            }
+
+            if (!component.TryGetData(SignalSwitchVisuals.On, out bool on))
+            {
+                return;
+            }
+
+            sprite.LayerSetState(0, on ? "on" : "off");
+        }
+    }
+}