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

using System;
using System.Linq;
using Server.Spells;

namespace Server.Items
{
  public class FlameSpurtTrap : BaseTrap
  {
    private Item m_Spurt;
    private Timer m_Timer;

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

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

    public virtual void StartTimer()
    {
      m_Timer ??= Timer.DelayCall(TimeSpan.FromSeconds(1.0), TimeSpan.FromSeconds(1.0), Refresh);
    }

    public virtual void StopTimer()
    {
      m_Timer?.Stop();

      m_Timer = null;
    }

    public virtual void CheckTimer()
    {
      Map 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();

      m_Spurt?.Delete();
    }

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

      bool foundPlayer = GetMobilesInRange(3)
        .Where(mob => mob.Player && mob.Alive && mob.AccessLevel <= AccessLevel.Player)
        .Any(mob => Z + 8 >= mob.Z && mob.Z + 16 > Z);

      if (!foundPlayer)
      {
        m_Spurt?.Delete();
        m_Spurt = null;
      }
      else if (m_Spurt?.Deleted != false)
      {
        m_Spurt = new Static(0x3709);
        m_Spurt.MoveToWorld(Location, Map);

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

    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);
    }

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

      writer.Write(0); // version

      writer.Write(m_Spurt);
    }

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

      int version = reader.ReadInt();

      switch (version)
      {
        case 0:
        {
          Item item = reader.ReadItem();

          item?.Delete();

          CheckTimer();

          break;
        }
      }
    }
  }
}