Add pipe coloring (#4261)

Content.Client/Atmos/Visualizers/ScrubberVisualizer.cs

@@ -0,0 +1,51 @@
+using Content.Shared.Atmos.Piping.Unary.Visuals;
+using JetBrains.Annotations;
+using Robust.Client.GameObjects;
+
+namespace Content.Client.Atmos.Visualizers
+{
+    [UsedImplicitly]
+    public class ScrubberVisualizer : AppearanceVisualizer
+    {
+        private string _offState = "scrub_off";
+        private string _scrubState = "scrub_on";
+        private string _siphonState = "scrub_purge";
+        private string _weldedState = "scrub_welded";
+        private string _wideState = "scrub_wide";
+
+        public override void OnChangeData(AppearanceComponent component)
+        {
+            base.OnChangeData(component);
+
+            if (!component.Owner.TryGetComponent(out ISpriteComponent? sprite))
+                return;
+
+            if (!component.TryGetData(ScrubberVisuals.State, out ScrubberState state))
+                return;
+
+            switch (state)
+            {
+                case ScrubberState.Off:
+                    sprite.LayerSetState(ScrubberVisualLayers.Scrubber, _offState);
+                    break;
+                case ScrubberState.Scrub:
+                    sprite.LayerSetState(ScrubberVisualLayers.Scrubber, _scrubState);
+                    break;
+                case ScrubberState.Siphon:
+                    sprite.LayerSetState(ScrubberVisualLayers.Scrubber, _siphonState);
+                    break;
+                case ScrubberState.Welded:
+                    sprite.LayerSetState(ScrubberVisualLayers.Scrubber, _weldedState);
+                    break;
+                case ScrubberState.WideScrub:
+                    sprite.LayerSetState(ScrubberVisualLayers.Scrubber, _wideState);
+                    break;
+            }
+        }
+    }
+
+    public enum ScrubberVisualLayers
+    {
+        Scrubber,
+    }
+}