using System;

namespace Chernobyl.Attribution
{
    /// <summary>
    /// Applies an ID on an attributable item.
    /// </summary>
    [AttributeUsage(AttributeTargets.All, AllowMultiple = true)]
    public class GuidAttribute : Attribute, IKeyAttribute<Guid>
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="GuidAttribute"/> class.
        /// </summary>
        /// <param name="guid">The ID of the item attributed.</param>
        public GuidAttribute(string guid)
        {
            Key = new Guid(guid);
        }

        /// <summary>
        /// The key of the item attributed.
        /// </summary>
        public Guid Key { get; private set; }

        /// <summary>
        /// The key of the item attributed.
        /// </summary>
        object IKeyAttribute.Key { get { return Key; } }
    }
}