using System;

namespace Vinno.IUS.Common.Network.Transfer
{
    public class EchoRequest : DictionaryMessage, INoEncryptionMessage, ISystemMessage
    {
        /// <summary>
        /// Gets the token of this echo.
        /// </summary>
        public string Token { get; }

        public EchoRequest(string token) : base(SystemTags.Echo)
        {
            Token = token;
            AddMessage(SystemTags.EchoToken, new StringElement(token));
        }

        private EchoRequest(Message message) : base(message)
        {
            Token = GetElement<StringElement>(SystemTags.EchoToken).Value;
        }

        public static EchoRequest Convert(Message message)
        {
            try
            {
                if (message.Tag != SystemTags.Echo)
                {
                    return null;
                }
                return new EchoRequest(message);
            }
            catch (Exception)
            {
                //DoNothing.
            }
            return null;
        }
    }

}