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

using System;
using ModernUO.Serialization;
using Server.Spells;

namespace Server.Items;

[SerializationGenerator(0, false)]
public partial class FlameSpurtTrap : BaseTrap
{
    [SerializableField(0)]
    private Item _spurt;
    private TimerExecutionToken _timerToken;

    [Constructible]
    public FlameSpurtTrap() : base(0x1B71) => Visible = false;

    public virtual void StartTimer()
    {
        if (!_timerToken.Running)
        {
            Timer.StartTimer(TimeSpan.FromSeconds(1.0), TimeSpan.FromSeconds(1.0), Refresh, out _timerToken);
        }
    }

    public virtual void StopTimer()
    {
        _timerToken.Cancel();
    }

    public virtual void CheckTimer()
    {
        var map = Map;

        if (map?.GetSector(GetWorldLocation()).Active == true)
        {
            StartTimer();
        }
        else
        {
            StopTimer();
        }
    }

    public override void OnLocationChange(Point3D oldLocation)
    {
        base.OnLocationChange(oldLocation);

        CheckTimer();
    }

    public override void OnMapChange()
    {
        base.OnMapChange();

        CheckTimer();
    }

    public override void OnSectorActivate()
    {
        base.OnSectorActivate();

        StartTimer();
    }

    public override void OnSectorDeactivate()
    {
        base.OnSectorDeactivate();

        StopTimer();
    }

    public override void OnDelete()
    {
        base.OnDelete();

        _spurt?.Delete();
    }

    public virtual void Refresh()
    {
        if (Deleted)
        {
            return;
        }

        foreach (var mob in GetMobilesInRange(3))
        {
            if (mob.Player && mob.Alive && mob.AccessLevel <= AccessLevel.Player && Z + 8 >= mob.Z && mob.Z + 16 > Z)
            {
                if (_spurt?.Deleted != false)
                {
                    _spurt = new Static(0x3709);

                    // This MoveToWorld is generally not safe in a range loop, except we return after this on L100
                    _spurt.MoveToWorld(Location, Map);

                    Effects.PlaySound(GetWorldLocation(), Map, 0x309);
                }

                return;
            }
        }

        _spurt?.Delete();
        _spurt = null;
    }

    public override bool OnMoveOver(Mobile m)
    {
        if (m.AccessLevel > AccessLevel.Player)
        {
            return true;
        }

        if (!(m.Player && m.Alive))
        {
            return false;
        }

        CheckTimer();

        SpellHelper.Damage(TimeSpan.FromTicks(1), m, m, Utility.RandomMinMax(1, 30));
        m.PlaySound(m.Female ? 0x327 : 0x437);

        return false;
    }

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

        if (m.Location == oldLocation || !m.Player || !m.Alive || m.AccessLevel > AccessLevel.Player
            || !CheckRange(m.Location, oldLocation, 1))
        {
            return;
        }

        CheckTimer();

        SpellHelper.Damage(TimeSpan.FromTicks(1), m, m, Utility.RandomMinMax(1, 10));
        m.PlaySound(m.Female ? 0x327 : 0x437);

        if (m.Body.IsHuman)
        {
            m.Animate(20, 1, 1, true, false, 0);
        }
    }

    [AfterDeserialization(false)]
    private void AfterDeserialization()
    {
        _spurt?.Delete();
        CheckTimer();
    }
}