Minecraft-Console-Client/MinecraftClient/Commands/UseItem.cs

using Brigadier.NET;
using Brigadier.NET.Builder;
using MinecraftClient.CommandHandler;
using MinecraftClient.Inventory;
using MinecraftClient.Mapping;
using static MinecraftClient.CommandHandler.CmdResult;

namespace MinecraftClient.Commands
{
    class UseItem : Command
    {
        public override string CmdName { get { return "useitem"; } }
        public override string CmdUsage { get { return "useitem [x] [y] [z]"; } }
        public override string CmdDesc { get { return Translations.cmd_useitem_desc; } }

        public override void RegisterCommand(CommandDispatcher<CmdResult> dispatcher)
        {
            dispatcher.Register(l => l.Literal("help")
                .Then(l => l.Literal(CmdName)
                    .Executes(r => GetUsage(r.Source, string.Empty))
                )
            );

            dispatcher.Register(l => l.Literal(CmdName)
                .Executes(r => DoUseItem(r.Source))
                .Then(l => l.Argument("Location", MccArguments.Location())
                    .Executes(r => DoUseItemAtLocation(r.Source, MccArguments.GetLocation(r, "Location"))))
                .Then(l => l.Literal("_help")
                    .Executes(r => GetUsage(r.Source, string.Empty))
                    .Redirect(dispatcher.GetRoot().GetChild("help").GetChild(CmdName)))
            );
        }

        private int GetUsage(CmdResult r, string? cmd)
        {
            return r.SetAndReturn(cmd switch
            {
#pragma warning disable format // @formatter:off
                _           =>  GetCmdDescTranslated(),
#pragma warning restore format // @formatter:on
            });
        }

        private int DoUseItem(CmdResult r)
        {
            McClient handler = CmdResult.currentHandler!;
            if (!handler.GetInventoryEnabled())
                return r.SetAndReturn(Status.FailNeedInventory);

            if (handler.GetTerrainEnabled())
            {
                const double maxDistance = 4.5;
                var raycast = RaycastHelper.RaycastBlock(handler, maxDistance, false);
                if (raycast.Item1 && raycast.Item3.Type != Material.Air)
                {
                    handler.PlaceBlock(raycast.Item2, Direction.Up, lookAtBlock: true);
                    handler.DoAnimation((int)Hand.MainHand);
                    return r.SetAndReturn(Status.Done, Translations.cmd_useitem_use);
                }
            }

            handler.UseItemOnHand();
            return r.SetAndReturn(Status.Done, Translations.cmd_useitem_use);
        }

        private int DoUseItemAtLocation(CmdResult r, Location block)
        {
            McClient handler = CmdResult.currentHandler!;
            if (!handler.GetTerrainEnabled())
                return r.SetAndReturn(Status.FailNeedTerrain);

            Location current = handler.GetCurrentLocation();
            block = block.ToAbsolute(current).ToFloor();
            handler.PlaceBlock(block, Direction.Up, lookAtBlock: true);
            handler.DoAnimation((int)Hand.MainHand);
            return r.SetAndReturn(Status.Done, Translations.cmd_useitem_use);
        }

    }
}