riversong-code-showcase/Source/Engine/GameData/GameDatabaseSystem.cs

using Cysharp.Threading.Tasks;
using UnityEngine.AddressableAssets;
using Object = UnityEngine.Object;

namespace DanieleMarotta.RiversongCodeShowcase
{
    [GameSystemGroup(typeof(EarlyGameSystemGroup))]
    public class GameDatabaseSystem : GameSystem, IInitializable, IServiceProvider
    {
        public const string GameDataAddressablesKey = "GameData";

        private GameDatabase _gameDatabase;

        public GameDatabaseSystem(IServiceLocator serviceLocator) : base(serviceLocator)
        {
        }

        public void RegisterServices(IServiceLocator serviceLocator)
        {
            _gameDatabase = new GameDatabase();
            ServiceLocator.RegisterService<IGameDatabase>(_gameDatabase);
        }

        public async UniTask InitializeAsync()
        {
            await Addressables.LoadAssetsAsync<Object>(GameDataAddressablesKey, OnAssetLoaded);
        }

        private void OnAssetLoaded(Object asset)
        {
            var id = asset.GetInstanceID();
            id = unchecked(id + 0x40000000);

            _gameDatabase.Add(id, asset);
        }
    }
}