Carp wave spawner and dragons as an actual event (#10254)

Content.Client/Sprite/RandomSpriteSystem.cs

@@ -0,0 +1,58 @@
+using Content.Shared.Sprite;
+using Robust.Client.GameObjects;
+using Robust.Shared.GameStates;
+using Robust.Shared.Reflection;
+
+namespace Content.Client.Sprite;
+
+public sealed class RandomSpriteSystem : SharedRandomSpriteSystem
+{
+    [Dependency] private readonly IReflectionManager _reflection = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<RandomSpriteComponent, ComponentHandleState>(OnHandleState);
+    }
+
+    private void OnHandleState(EntityUid uid, RandomSpriteComponent component, ref ComponentHandleState args)
+    {
+        if (args.Current is not RandomSpriteColorComponentState state)
+            return;
+
+        if (state.Selected.Equals(component.Selected))
+            return;
+
+        component.Selected.Clear();
+        component.Selected.EnsureCapacity(state.Selected.Count);
+
+        foreach (var layer in state.Selected)
+        {
+            component.Selected.Add(layer.Key, layer.Value);
+        }
+
+        UpdateAppearance(uid, component);
+    }
+
+    private void UpdateAppearance(EntityUid uid, RandomSpriteComponent component, SpriteComponent? sprite = null)
+    {
+        if (!Resolve(uid, ref sprite, false))
+            return;
+
+        foreach (var layer in component.Selected)
+        {
+            object key;
+            if (_reflection.TryParseEnumReference(layer.Key, out var @enum))
+            {
+                key = @enum;
+            }
+            else
+            {
+                key = layer.Key;
+            }
+
+            sprite.LayerSetState(key, layer.Value.State);
+            sprite.LayerSetColor(key, layer.Value.Color ?? Color.White);
+        }
+    }
+}