Entity Tables (EntitySpawnEntry replacement) (#30579)

* Entity table code

* entity table examples

* fix dat shit

* access

* tests tests tests

* sloth review

Content.Shared/Containers/ContainerFillSystem.cs

@@ -1,4 +1,5 @@
 using System.Numerics;
+using Content.Shared.EntityTable;
 using Robust.Shared.Containers;
 using Robust.Shared.Map;
 
@@ -7,11 +8,14 @@ namespace Content.Shared.Containers;
 public sealed class ContainerFillSystem : EntitySystem
 {
     [Dependency] private readonly SharedContainerSystem _containerSystem = default!;
+    [Dependency] private readonly EntityTableSystem _entityTable = default!;
+    [Dependency] private readonly SharedTransformSystem _transform = default!;
 
     public override void Initialize()
     {
         base.Initialize();
         SubscribeLocalEvent<ContainerFillComponent, MapInitEvent>(OnMapInit);
+        SubscribeLocalEvent<EntityTableContainerFillComponent, MapInitEvent>(OnTableMapInit);
     }
 
     private void OnMapInit(EntityUid uid, ContainerFillComponent component, MapInitEvent args)
@@ -42,4 +46,37 @@ public sealed class ContainerFillSystem : EntitySystem
             }
         }
     }
+
+    private void OnTableMapInit(Entity<EntityTableContainerFillComponent> ent, ref MapInitEvent args)
+    {
+        if (!TryComp(ent, out ContainerManagerComponent? containerComp))
+            return;
+
+        if (TerminatingOrDeleted(ent) || !Exists(ent))
+            return;
+
+        var xform = Transform(ent);
+        var coords = new EntityCoordinates(ent, Vector2.Zero);
+
+        foreach (var (containerId, table) in ent.Comp.Containers)
+        {
+            if (!_containerSystem.TryGetContainer(ent, containerId, out var container, containerComp))
+            {
+                Log.Error($"Entity {ToPrettyString(ent)} with a {nameof(EntityTableContainerFillComponent)} is missing a container ({containerId}).");
+                continue;
+            }
+
+            var spawns = _entityTable.GetSpawns(table);
+            foreach (var proto in spawns)
+            {
+                var spawn = Spawn(proto, coords);
+                if (!_containerSystem.Insert(spawn, container, containerXform: xform))
+                {
+                    Log.Error($"Entity {ToPrettyString(ent)} with a {nameof(EntityTableContainerFillComponent)} failed to insert an entity: {ToPrettyString(spawn)}.");
+                    _transform.AttachToGridOrMap(spawn);
+                    break;
+                }
+            }
+        }
+    }
 }