ModernUO/Projects/UOContent/Spells/Spellweaving/Items/TransientItem.cs

using System;
using ModernUO.Serialization;

namespace Server.Items;

[SerializationGenerator(2, false)]
public partial class TransientItem : Item
{
    private void MigrateFrom(V1Content content)
    {
        _expiration = content.Expiration;
    }

    private TimerExecutionToken _timerToken;

    [AnchoredDateTime]
    [SerializableField(0)]
    [SerializedCommandProperty(AccessLevel.GameMaster)]
    private DateTime _expiration;

    [Constructible]
    public TransientItem(int itemID, TimeSpan lifeSpan) : base(itemID)
    {
        _expiration = Core.Now + lifeSpan;

        Timer.StartTimer(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(5), CheckExpiry, out _timerToken);
    }

    public override bool Nontransferable => true;

    public virtual TextDefinition InvalidTransferMessage => TextDefinition.Empty;

    public override void HandleInvalidTransfer(Mobile from)
    {
        InvalidTransferMessage.SendMessageTo(from);

        Delete();
    }

    public virtual void Expire(Mobile parent)
    {
        parent?.SendLocalizedMessage(1072515, Name ?? $"#{LabelNumber}"); // The ~1_name~ expired...

        Effects.PlaySound(GetWorldLocation(), Map, 0x201);

        Delete();
    }

    public virtual void SendTimeRemainingMessage(Mobile to)
    {
        var remaining = Utility.Max(_expiration - Core.Now, TimeSpan.Zero);
        to.SendLocalizedMessage(
            1072516, // ~1_name~ will expire in ~2_val~ seconds!
            $"{Name ?? $"#{LabelNumber}"}\t{remaining.TotalSeconds:F0}"
        );
    }

    public override void OnDelete()
    {
        _timerToken.Cancel();
        base.OnDelete();
    }

    public virtual void CheckExpiry()
    {
        if (_expiration - Core.Now <= TimeSpan.Zero)
        {
            Expire(RootParent as Mobile);
        }
        else
        {
            InvalidateProperties();
        }
    }

    public void ResetExpiration(TimeSpan duration) => Expiration = Core.Now + duration;

    public override void GetProperties(IPropertyList list)
    {
        base.GetProperties(list);

        var remaining = Utility.Max(_expiration - Core.Now, TimeSpan.Zero);
        list.Add(1072517, $"{remaining.TotalSeconds:F0}"); // Lifespan: ~1_val~ seconds
    }

    private void Deserialize(IGenericReader reader, int version)
    {
        var lifespan = reader.ReadTimeSpan();
        var creationTime = reader.ReadDateTime(); // CreationTime

        _expiration = creationTime + lifespan;
    }

    [AfterDeserialization]
    private void AfterDeserialization()
    {
        Timer.StartTimer(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(5), CheckExpiry, out _timerToken);
    }
}