Add AfterSaveEvent

Robust.Server/GameObjects/EntitySystems/MapLoaderSystem.cs

@@ -960,6 +960,9 @@ public MappingDataNode GetSaveData(EntityUid uid)
         _logLoader.Debug($"Wrote entity section for {entities.Count} entities in {_stopwatch.Elapsed}");
         _context.Clear();
 
+        var ve = new AfterSaveEvent(uid, Transform(uid).MapUid);
+        RaiseLocalEvent(ve);
+
         return data;
     }
 

Robust.Shared/Map/Events/MapSerializationEvents.cs

@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using Robust.Shared.GameObjects;
 
 namespace Robust.Shared.Map.Events;
@@ -49,3 +49,25 @@ public BeforeSaveEvent(EntityUid entity, EntityUid? map)
         Map = map;
     }
 }
+
+/// <summary>
+/// This event is broadcast just after the map loader reads the entity section.
+/// </summary>
+public sealed class AfterSaveEvent
+{
+    /// <summary>
+    /// The entity that was saved. usually a map or grid.
+    /// </summary>
+    public EntityUid Entity;
+
+    /// <summary>
+    /// The map that the <see cref="Entity"/> is on.
+    /// </summary>
+    public EntityUid? Map;
+
+    public AfterSaveEvent(EntityUid entity, EntityUid? map)
+    {
+        Entity = entity;
+        Map = map;
+    }
+}