DP-PatMe2Mqtt/PatMe2Mqtt/Cmd.cs

using Dalamud.Game.Command;
using System;

namespace PatMe2Mqtt
{
    public abstract class Cmd : IDisposable
    {
        private CommandManager? _commandManager;
        private string? _commandString;

        public abstract string Name { get; }
        public string FullName => _commandString ?? $"/{Name}";

        public abstract string HelpMessage { get; }

        public void Register(CommandManager commandManager)
        {
            if (_commandManager is not null)
            {
                Dispose();
            }

            _commandManager = commandManager;
            _commandString = FullName;

            commandManager.AddHandler(FullName, new CommandInfo(Handle)
            {
                HelpMessage = HelpMessage
            });
        }

        public abstract void Run(string arguments);

        public void Dispose()
        {
            _commandManager?.RemoveHandler(FullName);
            _commandManager = null;

            GC.SuppressFinalize(this);
        }

        private void Handle(string command, string arguments)
        {
            if (command != _commandString)
            {
                return;
            }

            Run(arguments);
        }
    }
}