modernuo/Projects/UOContent/Commands/Generic/Implementors/SingleCommandImplementor.cs

using Server.Targeting;

namespace Server.Commands.Generic
{
    public class SingleCommandImplementor : BaseCommandImplementor
    {
        public SingleCommandImplementor()
        {
            Accessors = new[] { "Single" };
            SupportRequirement = CommandSupport.Single;
            AccessLevel = AccessLevel.Counselor;
            Usage = "Single <command>";
            Description =
                "Invokes the command on a single targeted object. This is the same as just invoking the command directly.";
        }

        public override void Register(BaseCommand command)
        {
            base.Register(command);

            for (var i = 0; i < command.Commands.Length; ++i)
            {
                CommandSystem.Register(command.Commands[i], command.AccessLevel, Redirect);
            }
        }

        public void Redirect(CommandEventArgs e)
        {
            Commands.TryGetValue(e.Command, out var command);

            if (command == null)
            {
                e.Mobile.SendMessage("That is either an invalid command name or one that does not support this modifier.");
            }
            else if (e.Mobile.AccessLevel < command.AccessLevel)
            {
                e.Mobile.SendMessage("You do not have access to that command.");
            }
            else if (command.ValidateArgs(this, e))
            {
                Process(e.Mobile, command, e.Arguments);
            }
        }

        public override void Process(Mobile from, BaseCommand command, string[] args)
        {
            if (command.ValidateArgs(this, new CommandEventArgs(from, command.Commands[0], GenerateArgString(args), args)))
            {
                from.BeginTarget(
                    -1,
                    command.ObjectTypes == ObjectTypes.All,
                    TargetFlags.None,
                    (m, targeted, a) => OnTarget(m, targeted, command, a),
                    args
                );
            }
        }

        public void OnTarget(Mobile from, object targeted, BaseCommand command, string[] args)
        {
            if (!BaseCommand.IsAccessible(from, targeted))
            {
                from.SendLocalizedMessage(500447); // That is not accessible.
                return;
            }

            switch (command.ObjectTypes)
            {
                case ObjectTypes.Both:
                    {
                        if (targeted is not Item && targeted is not Mobile)
                        {
                            from.SendMessage("This command does not work on that.");
                            return;
                        }

                        break;
                    }
                case ObjectTypes.Items:
                    {
                        if (targeted is not Item)
                        {
                            from.SendMessage("This command only works on items.");
                            return;
                        }

                        break;
                    }
                case ObjectTypes.Mobiles:
                    {
                        if (targeted is not Mobile)
                        {
                            from.SendMessage("This command only works on mobiles.");
                            return;
                        }

                        break;
                    }
            }

            RunCommand(from, targeted, command, args);
        }
    }
}