Re-organize all projects (#4166)

Content.Server/Disposal/Unit/EntitySystems/DisposableSystem.cs

@@ -0,0 +1,19 @@
+using Content.Server.Disposal.Unit.Components;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Disposal.Unit.EntitySystems
+{
+    [UsedImplicitly]
+    internal sealed class DisposableSystem : EntitySystem
+    {
+
+        public override void Update(float frameTime)
+        {
+            foreach (var comp in ComponentManager.EntityQuery<DisposalHolderComponent>(true))
+            {
+                comp.Update(frameTime);
+            }
+        }
+    }
+}

Content.Server/Disposal/Unit/EntitySystems/DisposalUnitSystem.cs

@@ -0,0 +1,30 @@
+using Content.Server.Disposal.Unit.Components;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Disposal.Unit.EntitySystems
+{
+    public sealed class DisposalUnitSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeLocalEvent<DisposalUnitComponent, PhysicsBodyTypeChangedEvent>(BodyTypeChanged);
+        }
+
+        public override void Shutdown()
+        {
+            base.Shutdown();
+
+            UnsubscribeLocalEvent<DisposalUnitComponent, PhysicsBodyTypeChangedEvent>();
+        }
+
+        private static void BodyTypeChanged(
+            EntityUid uid,
+            DisposalUnitComponent component,
+            PhysicsBodyTypeChangedEvent args)
+        {
+            component.UpdateVisualState();
+        }
+    }
+}