ModernUO/Projects/Server/Items/SecureTradeContainer.cs

using Server.Accounting;
using Server.Network;

namespace Server.Items
{
    public class SecureTradeContainer : Container
    {
        public SecureTradeContainer(SecureTrade trade) : base(0x1E5E)
        {
            Trade = trade;

            Movable = false;
        }

        public SecureTradeContainer(Serial serial) : base(serial)
        {
        }

        public SecureTrade Trade { get; }

        public override bool CheckHold(Mobile m, Item item, bool message, bool checkItems, int plusItems, int plusWeight)
        {
            if (item == Trade.From.VirtualCheck || item == Trade.To.VirtualCheck)
            {
                return true;
            }

            var to = Trade.From.Container != this ? Trade.From.Mobile : Trade.To.Mobile;

            return m.CheckTrade(to, item, this, message, checkItems, plusItems, plusWeight);
        }

        public override bool CheckLift(Mobile from, Item item, ref LRReason reject)
        {
            reject = LRReason.CannotLift;
            return false;
        }

        public override bool IsAccessibleTo(Mobile check) =>
            IsChildOf(check) && Trade?.Valid == true && base.IsAccessibleTo(check);

        public override void OnItemAdded(Item item)
        {
            if (item is not VirtualCheck)
            {
                ClearChecks();
            }
        }

        public override void OnItemRemoved(Item item)
        {
            if (item is not VirtualCheck)
            {
                ClearChecks();
            }
        }

        public override void OnSubItemAdded(Item item)
        {
            if (item is not VirtualCheck)
            {
                ClearChecks();
            }
        }

        public override void OnSubItemRemoved(Item item)
        {
            if (item is not VirtualCheck)
            {
                ClearChecks();
            }
        }

        public void ClearChecks()
        {
            if (Trade == null)
            {
                return;
            }

            if (Trade.From?.IsDisposed == false)
            {
                Trade.From.Accepted = false;
            }

            if (Trade.To?.IsDisposed == false)
            {
                Trade.To.Accepted = false;
            }

            Trade.Update();
        }

        public override bool IsChildVisibleTo(Mobile m, Item child) =>
            child is VirtualCheck
                ? !AccountGold.Enabled || m.NetState?.NewSecureTrading != true
                : base.IsChildVisibleTo(m, child);

        public override void Serialize(IGenericWriter writer)
        {
            base.Serialize(writer);

            writer.Write(0); // version
        }

        public override void Deserialize(IGenericReader reader)
        {
            base.Deserialize(reader);

            var version = reader.ReadInt();
        }
    }
}