ModernUO/Projects/UOContent/Items/Misc/FlippableAddonAttribute.cs

using System;
using Server.Multis;

namespace Server.Items;

[AttributeUsage(AttributeTargets.Class)]
public class FlippableAddonAttribute : Attribute
{
    private static readonly string m_MethodName = "Flip";

    private static readonly Type[] m_Params =
    {
        typeof(Mobile), typeof(Direction)
    };

    public FlippableAddonAttribute(params Direction[] directions) => Directions = directions;

    public Direction[] Directions { get; }

    public virtual void Flip(Mobile from, Item addon)
    {
        if (!(Directions?.Length > 1))
        {
            return;
        }

        try
        {
            var flipMethod = addon.GetType().GetMethod(m_MethodName, m_Params);

            if (flipMethod == null)
            {
                return;
            }

            var index = 0;

            for (var i = 0; i < Directions.Length; i++)
            {
                if (addon.Direction == Directions[i])
                {
                    index = i + 1;
                    break;
                }
            }

            if (index >= Directions.Length)
            {
                index = 0;
            }

            ClearComponents(addon);

            flipMethod.Invoke(addon, new object[] { from, Directions[index] });

            BaseHouse house = null;
            var result = AddonFitResult.Valid;

            addon.Map = Map.Internal;

            if (addon is BaseAddon baseAddon)
            {
                result = baseAddon.CouldFit(baseAddon.Location, from.Map, from, ref house);
            }
            else if (addon is BaseAddonContainer container)
            {
                result = container.CouldFit(container.Location, from.Map, from, ref house);
            }

            addon.Map = from.Map;

            if (result != AddonFitResult.Valid)
            {
                if (index == 0)
                {
                    index = Directions.Length - 1;
                }
                else
                {
                    index -= 1;
                }

                ClearComponents(addon);

                flipMethod.Invoke(addon, new object[] { from, Directions[index] });

                if (result == AddonFitResult.Blocked)
                {
                    from.SendLocalizedMessage(500269); // You cannot build that there.
                }
                else if (result == AddonFitResult.NotInHouse)
                {
                    from.SendLocalizedMessage(500274); // You can only place this in a house that you own!
                }
                else if (result == AddonFitResult.DoorsNotClosed)
                {
                    from.SendMessage("You must close all house doors before placing this.");
                }
                else if (result == AddonFitResult.DoorTooClose)
                {
                    from.SendLocalizedMessage(500271); // You cannot build near the door.
                }
                else if (result == AddonFitResult.NoWall)
                {
                    from.SendLocalizedMessage(500268); // This object needs to be mounted on something.
                }
            }

            addon.Direction = Directions[index];
        }
        catch
        {
            // ignored
        }
    }

    private void ClearComponents(Item item)
    {
        if (item is BaseAddon addon)
        {
            foreach (var c in addon.Components)
            {
                c.Addon = null;
                c.Delete();
            }

            addon.Clear(addon.Components);
        }
        else if (item is BaseAddonContainer addonContainer)
        {
            foreach (var c in addonContainer.Components)
            {
                c.Addon = null;
                c.Delete();
            }

            addonContainer.Clear(addonContainer.Components);
        }
    }
}