Make trays clientside (#14826)

Content.Shared/SubFloor/SharedTrayScannerSystem.cs

@@ -0,0 +1,69 @@
+using Content.Shared.Interaction;
+using Robust.Shared.Containers;
+using Robust.Shared.GameStates;
+using Robust.Shared.Map;
+using Robust.Shared.Serialization;
+using Robust.Shared.Timing;
+using Robust.Shared.Utility;
+using System.Linq;
+
+namespace Content.Shared.SubFloor;
+
+public abstract class SharedTrayScannerSystem : EntitySystem
+{
+    [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
+
+    public const float SubfloorRevealAlpha = 0.8f;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<TrayScannerComponent, ComponentGetState>(OnTrayScannerGetState);
+        SubscribeLocalEvent<TrayScannerComponent, ComponentHandleState>(OnTrayScannerHandleState);
+        SubscribeLocalEvent<TrayScannerComponent, ActivateInWorldEvent>(OnTrayScannerActivate);
+    }
+
+    private void OnTrayScannerActivate(EntityUid uid, TrayScannerComponent scanner, ActivateInWorldEvent args)
+    {
+        SetScannerEnabled(uid, !scanner.Enabled, scanner);
+    }
+
+    private void SetScannerEnabled(EntityUid uid, bool enabled, TrayScannerComponent? scanner = null)
+    {
+        if (!Resolve(uid, ref scanner) || scanner.Enabled == enabled)
+            return;
+
+        scanner.Enabled = enabled;
+        Dirty(scanner);
+
+        // We don't remove from _activeScanners on disabled, because the update function will handle that, as well as
+        // managing the revealed subfloor entities
+
+        if (TryComp<AppearanceComponent>(uid, out var appearance))
+        {
+            _appearance.SetData(uid, TrayScannerVisual.Visual, scanner.Enabled ? TrayScannerVisual.On : TrayScannerVisual.Off, appearance);
+        }
+    }
+
+    private void OnTrayScannerGetState(EntityUid uid, TrayScannerComponent scanner, ref ComponentGetState args)
+    {
+        args.State = new TrayScannerState(scanner.Enabled);
+    }
+
+    private void OnTrayScannerHandleState(EntityUid uid, TrayScannerComponent scanner, ref ComponentHandleState args)
+    {
+        if (args.Current is not TrayScannerState state)
+            return;
+
+        SetScannerEnabled(uid, state.Enabled, scanner);
+    }
+}
+
+[Serializable, NetSerializable]
+public enum TrayScannerVisual : sbyte
+{
+    Visual,
+    On,
+    Off
+}