crystall-punk-14/Content.Shared/Spawners/EntitySystems/SharedTimedDespawnSystem.cs

using Content.Shared.Spawners.Components;
using Robust.Shared.Timing;

namespace Content.Shared.Spawners.EntitySystems;

public abstract class SharedTimedDespawnSystem : EntitySystem
{
    [Dependency] private readonly IGameTiming _timing = default!;

    public override void Initialize()
    {
        base.Initialize();
        UpdatesOutsidePrediction = true;
    }

    public override void Update(float frameTime)
    {
        base.Update(frameTime);

        if (!_timing.IsFirstTimePredicted) return;

        foreach (var comp in EntityQuery<TimedDespawnComponent>())
        {
            if (!CanDelete(comp.Owner)) continue;

            comp.Lifetime -= frameTime;

            if (comp.Lifetime <= 0)
                EntityManager.QueueDeleteEntity(comp.Owner);
        }
    }

    protected abstract bool CanDelete(EntityUid uid);
}