ModernUO/Projects/UOContent/Items/Traps/BaseTrap.cs

using System;

namespace Server.Items
{
    public abstract class BaseTrap : Item
    {
        private DateTime m_NextPassiveTrigger, m_NextActiveTrigger;

        public BaseTrap(int itemID) : base(itemID) => Movable = false;

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

        public virtual bool PassivelyTriggered => false;
        public virtual TimeSpan PassiveTriggerDelay => TimeSpan.Zero;
        public virtual int PassiveTriggerRange => -1;
        public virtual TimeSpan ResetDelay => TimeSpan.Zero;

        public override bool HandlesOnMovement => true; // Tell the core that we implement OnMovement

        public virtual void OnTrigger(Mobile from)
        {
        }

        public virtual int GetEffectHue()
        {
            var hue = Hue & 0x3FFF;

            if (hue < 2)
            {
                return 0;
            }

            return hue - 1;
        }

        public bool CheckRange(Point3D loc, Point3D oldLoc, int range) =>
            CheckRange(loc, range) && !CheckRange(oldLoc, range);

        public bool CheckRange(Point3D loc, int range) =>
            Z + 8 >= loc.Z && loc.Z + 16 > Z
                           && Utility.InRange(GetWorldLocation(), loc, range);

        public override void OnMovement(Mobile m, Point3D oldLocation)
        {
            base.OnMovement(m, oldLocation);

            if (m.Location == oldLocation)
            {
                return;
            }

            if (CheckRange(m.Location, oldLocation, 0) && Core.Now >= m_NextActiveTrigger)
            {
                m_NextActiveTrigger = m_NextPassiveTrigger = Core.Now + ResetDelay;

                OnTrigger(m);
            }
            else if (PassivelyTriggered && CheckRange(m.Location, oldLocation, PassiveTriggerRange) &&
                     Core.Now >= m_NextPassiveTrigger)
            {
                m_NextPassiveTrigger = Core.Now + PassiveTriggerDelay;

                OnTrigger(m);
            }
        }

        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();
        }
    }
}