TechbloxModdingAPI/TechbloxModdingAPI/Commands/CustomCommands.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Runtime.InteropServices;

namespace TechbloxModdingAPI.Commands
{
    internal static class CustomCommands
    {
        public struct CommandData
        {
            public string Name;
            public string Description;
            public Delegate Action;
        }

        private static Dictionary<string, CommandData> _commands = new Dictionary<string, CommandData>();
        public static void Register(string name, Delegate action, string desc)
        {
            _commands.Add(name, new CommandData
            {
                Name = name,
                Description = desc,
                Action = action
            });
        }

        public static void Call(string name, params object[] args)
        {
            if (_commands.TryGetValue(name, out var command))
            {
                var paramz = command.Action.Method.GetParameters();
                if (paramz.Length > args.Length)
                    throw new CommandParameterMissingException(
                        $"This command requires {paramz.Length} arguments, {args.Length} given");
                for (var index = 0; index < paramz.Length; index++)
                {
                    args[index] = Convert.ChangeType(args[index], paramz[index].ParameterType);
                }

                command.Action.DynamicInvoke(args);
            }
            else
                throw new CommandNotFoundException($"Command {name} does not exist!");
        }

        public static void Unregister(string name)
        {
            _commands.Remove(name);
        }

        public static bool Exists(string name) => _commands.ContainsKey(name);

        public static ReadOnlyDictionary<string, CommandData> GetAllCommandData() =>
            new ReadOnlyDictionary<string, CommandData>(_commands);
    }
}