RobustToolbox/Robust.Shared/GameObjects/IMapInit.cs

using Robust.Shared.IoC;
using Robust.Shared.Utility;

namespace Robust.Shared.GameObjects
{
    /// <summary>
    ///     Raised directed on an entity when the map is initialized.
    /// </summary>
    public sealed class MapInitEvent : EntityEventArgs
    {
    }

    public static class MapInitExt
    {
        private static readonly MapInitEvent MapInit = new MapInitEvent();

        public static void RunMapInit(this EntityUid entity, IEntityManager? entMan = null)
        {
            // Temporary until a bit more ECS
            IoCManager.Resolve(ref entMan);
            var meta = entMan.GetComponent<MetaDataComponent>(entity);

            if (meta.EntityLifeStage == EntityLifeStage.MapInitialized)
                return; // Already map initialized, do nothing.

            DebugTools.Assert(meta.EntityLifeStage == EntityLifeStage.Initialized, $"Expected entity {entMan.ToPrettyString(entity)} to be initialized, was {meta.EntityLifeStage}");
            meta.EntityLifeStage = EntityLifeStage.MapInitialized;

            entMan.EventBus.RaiseLocalEvent(entity, MapInit, false);
        }
    }
}