Add pipe coloring (#4261)

Content.Server/Atmos/Piping/EntitySystems/AtmosPipeColorSystem.cs

@@ -0,0 +1,45 @@
+using Content.Server.Atmos.Piping.Components;
+using Content.Shared.Atmos.Piping;
+using Robust.Server.GameObjects;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+
+namespace Content.Server.Atmos.Piping.EntitySystems
+{
+    public class AtmosPipeColorSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeLocalEvent<AtmosPipeColorComponent, ComponentStartup>(OnStartup);
+            SubscribeLocalEvent<AtmosPipeColorComponent, ComponentShutdown>(OnShutdown);
+        }
+
+        private void OnStartup(EntityUid uid, AtmosPipeColorComponent component, ComponentStartup args)
+        {
+            if (!ComponentManager.TryGetComponent(uid, out AppearanceComponent? appearance))
+                return;
+
+            appearance.SetData(PipeColorVisuals.Color, component.Color);
+        }
+
+        private void OnShutdown(EntityUid uid, AtmosPipeColorComponent component, ComponentShutdown args)
+        {
+            if (!ComponentManager.TryGetComponent(uid, out AppearanceComponent? appearance))
+                return;
+
+            appearance.SetData(PipeColorVisuals.Color, Color.White);
+        }
+
+        public void SetColor(EntityUid uid, AtmosPipeColorComponent component, Color color)
+        {
+            component.Color = color;
+
+            if (!ComponentManager.TryGetComponent(uid, out AppearanceComponent? appearance))
+                return;
+
+            appearance.SetData(PipeColorVisuals.Color, color);
+        }
+    }
+}