Proto-kinetic crusher (#16277)

Co-authored-by: AJCM-git <60196617+AJCM-git@users.noreply.github.com>

Content.Client/Weapons/Marker/DamageMarkerSystem.cs

@@ -0,0 +1,39 @@
+using Content.Shared.Weapons.Marker;
+using Robust.Client.GameObjects;
+using Robust.Shared.Timing;
+
+namespace Content.Client.Weapons.Marker;
+
+public sealed class DamageMarkerSystem : SharedDamageMarkerSystem
+{
+    [Dependency] private readonly IGameTiming _timing = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<DamageMarkerComponent, ComponentStartup>(OnMarkerStartup);
+        SubscribeLocalEvent<DamageMarkerComponent, ComponentShutdown>(OnMarkerShutdown);
+    }
+
+    private void OnMarkerStartup(EntityUid uid, DamageMarkerComponent component, ComponentStartup args)
+    {
+        if (!_timing.ApplyingState || component.Effect == null || !TryComp<SpriteComponent>(uid, out var sprite))
+            return;
+
+        var layer = sprite.LayerMapReserveBlank(DamageMarkerKey.Key);
+        sprite.LayerSetState(layer, component.Effect.RsiState, component.Effect.RsiPath);
+    }
+
+    private void OnMarkerShutdown(EntityUid uid, DamageMarkerComponent component, ComponentShutdown args)
+    {
+        if (!_timing.ApplyingState || !TryComp<SpriteComponent>(uid, out var sprite) || !sprite.LayerMapTryGet(DamageMarkerKey.Key, out var weh))
+            return;
+
+        sprite.RemoveLayer(weh);
+    }
+
+    private enum DamageMarkerKey : byte
+    {
+        Key
+    }
+}