Data-oriented Construction System (#2152)

- Powerful
- Data-oriented
- Approved by PJB
- Powered by node graphs and AI pathfinding
- Coded by the same nerd who brought you atmos

Co-authored-by: Exp <theexp111@gmail.com>

Content.Server/Construction/Completions/SpriteStateChange.cs

@@ -0,0 +1,39 @@
+#nullable enable
+using System.Threading.Tasks;
+using Content.Shared.Construction;
+using JetBrains.Annotations;
+using Robust.Server.GameObjects;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+using Robust.Shared.Utility;
+
+namespace Content.Server.Construction.Completions
+{
+    [UsedImplicitly]
+    public class SpriteStateChange : IGraphAction
+    {
+
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(this, x => x.State, "state", string.Empty);
+            serializer.DataField(this, x => x.Layer, "layer", 0);
+        }
+
+        public int Layer { get; private set; } = 0;
+        public string? State { get; private set; } = string.Empty;
+
+        public async Task StepCompleted(IEntity entity, IEntity user)
+        {
+            await PerformAction(entity, user);
+        }
+
+        public async Task PerformAction(IEntity entity, IEntity? user)
+        {
+            if (entity.Deleted || string.IsNullOrEmpty(State)) return;
+
+            if (!entity.TryGetComponent(out SpriteComponent? sprite)) return;
+
+            sprite.LayerSetState(Layer, State);
+        }
+    }
+}