SixShopSimulator/Assets/Scripts/Shop/StorageCrateRegistry.cs

using System.Collections.Generic;

namespace AfterHours.Shop
{
    /// <summary>
    /// Serverseitige Liste aller aktiven Lagerkisten, damit der SupplierService
    /// eine Lieferung der richtigen Kiste zuordnen kann.
    /// </summary>
    public sealed class StorageCrateRegistry
    {
        public static readonly StorageCrateRegistry Instance = new();

        private readonly List<StorageCrate> _crates = new();

        public void Register(StorageCrate crate) => _crates.Add(crate);

        public void Unregister(StorageCrate crate) => _crates.Remove(crate);

        /// <summary>Erste Kiste, die dieses Produkt führt.</summary>
        public StorageCrate FindFor(int productId)
        {
            foreach (var crate in _crates)
                if (crate != null && crate.ProductId == productId)
                    return crate;
            return null;
        }
    }
}