ModernUO/Projects/Scripts/Mobiles/Guards/BaseGuard.cs

using Server.Items;

namespace Server.Mobiles
{
  public abstract class BaseGuard : Mobile
  {
    public BaseGuard(Mobile target)
    {
      if (target != null)
      {
        Location = target.Location;
        Map = target.Map;

        Effects.SendLocationParticles(EffectItem.Create(Location, Map, EffectItem.DefaultDuration), 0x3728, 10, 10,
          5023);
      }
    }

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

    public abstract Mobile Focus{ get; set; }

    public static void Spawn(Mobile caller, Mobile target, int amount = 1, bool onlyAdditional = false)
    {
      if (target?.Deleted != false)
        return;

      IPooledEnumerable<Mobile> eable = target.GetMobilesInRange(15);

      foreach (Mobile m in eable)
        if (m is BaseGuard g)
        {
          if (g.Focus == null) // idling
          {
            g.Focus = target;

            --amount;
          }
          else if (g.Focus == target && !onlyAdditional)
          {
            --amount;
          }
        }

      eable.Free();

      while (amount-- > 0)
        caller.Region.MakeGuard(target);
    }

    public override bool OnBeforeDeath()
    {
      Effects.SendLocationParticles(EffectItem.Create(Location, Map, EffectItem.DefaultDuration), 0x3728, 10, 10,
        2023);

      PlaySound(0x1FE);

      Delete();

      return false;
    }

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

      writer.Write(0); // version
    }

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

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