CommandAttribute.cs

using System;
using Ultz.Extensions.Commands.Built;

namespace Ultz.Extensions.Commands.Attributes.Commands
{
    /// <summary>
    /// Marks the method as a <see cref="Command" /> with the given aliases.
    /// </summary>
    [AttributeUsage(AttributeTargets.Method)]
    public sealed class CommandAttribute : Attribute
    {
        /// <summary>
        /// Initialises a new <see cref="CommandAttribute" /> with the specified aliases.
        /// </summary>
        /// <param name="aliases"> The aliases to set. </param>
        /// <exception cref="ArgumentNullException">
        /// Command aliases must not be null.
        /// </exception>
        public CommandAttribute(params string[] aliases)
        {
            if (aliases == null)
            {
                throw new ArgumentNullException(nameof(aliases), "Command aliases must not be null.");
            }

            Aliases = aliases;
        }

        /// <summary>
        /// Gets the aliases.
        /// </summary>
        public string[] Aliases { get; }
    }
}