Map-Init guidebook entities. (#14823)

Content.Shared/Containers/ContainerFillSystem.cs

@@ -0,0 +1,47 @@
+using Robust.Shared.Containers;
+using Robust.Shared.Map;
+
+namespace Content.Shared.Containers;
+
+public sealed class ContainerFillSystem : EntitySystem
+{
+    [Dependency] private readonly SharedContainerSystem _containerSystem = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<ContainerFillComponent, MapInitEvent>(OnMapInit);
+    }
+
+    private void OnMapInit(EntityUid uid, ContainerFillComponent component, MapInitEvent args)
+    {
+        if (!TryComp(uid, out ContainerManagerComponent? containerComp))
+        {
+            Logger.Error($"Entity {ToPrettyString(uid)} with a {nameof(ContainerFillComponent)} has no {nameof(ContainerManagerComponent)}.");
+            return;
+        }
+
+        var xform = Transform(uid);
+        var coords = new EntityCoordinates(uid, Vector2.Zero);
+
+        foreach (var (contaienrId, prototypes) in component.Containers)
+        {
+            if (!_containerSystem.TryGetContainer(uid, contaienrId, out var container, containerComp))
+            {
+                Logger.Error($"Entity {ToPrettyString(uid)} with a {nameof(ContainerFillComponent)} is missing a container ({contaienrId}).");
+                continue;
+            }
+
+            foreach (var proto in prototypes)
+            {
+                var ent = Spawn(proto, coords);
+                if (!container.Insert(ent, EntityManager, null, xform))
+                {
+                    Logger.Error($"Entity {ToPrettyString(uid)} with a {nameof(ContainerFillComponent)} failed to insert an entity: {ToPrettyString(ent)}.");
+                    Transform(ent).AttachToGridOrMap();
+                    break;
+                }
+            }
+        }
+    }
+}