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/EmptyContainer.cs

@@ -0,0 +1,37 @@
+#nullable enable
+using System.Linq;
+using System.Threading.Tasks;
+using Content.Shared.Construction;
+using JetBrains.Annotations;
+using Robust.Server.GameObjects.Components.Container;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.Construction.Completions
+{
+    [UsedImplicitly]
+    public class EmptyContainer : IGraphAction
+    {
+        public string Container { get; private set; } = string.Empty;
+
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(this, x => x.Container, "container", string.Empty);
+        }
+
+        public async Task PerformAction(IEntity entity, IEntity? user)
+        {
+            if (entity.Deleted) return;
+
+            if (!entity.TryGetComponent(out ContainerManagerComponent? containerManager) ||
+                !containerManager.TryGetContainer(Container, out var container)) return;
+
+            foreach (var ent in container.ContainedEntities.ToArray())
+            {
+                if (ent == null || ent.Deleted) continue;
+                container.ForceRemove(ent);
+                ent.Transform.Coordinates = entity.Transform.Coordinates;
+            }
+        }
+    }
+}