using System;

using System.Linq;

​

public class LockToken

{

    public string HolderId {get; set;}

    public string ResourceId {get; set;}

    public DateTimeOffset LeaseExpiry {get; set;}

    public LockToken(string s, string sd, DateTimeOffset ssx)

    {

        HolderId = s;

        ResourceId = sd;

        LeaseExpiry = ssx;

    }

}

​

public static class DynamoDBLockTokenMapper

    {

        const int DynamoDBLockTokenComponentsNumber = 3;

        const char DynamoDBLockTokenComponentsSeparator = ' ';

​

        public static LockToken GetDynamoDBLockTokenFromString(string stringifiedToken)

        {

            if (string.IsNullOrEmpty(stringifiedToken))

            {

                return null;

            }

​

            var components = stringifiedToken.Split(DynamoDBLockTokenComponentsSeparator);

​

            if (components != null && components.Any() && components.Length == DynamoDBLockTokenComponentsNumber && DateTimeOffset.TryParse(components[2], out var dateTimeOffset))

            {

                return new LockToken(components[0], components[1], dateTimeOffset);

            }

            else

            {

                return null;

            }

        }

​

        public static string GetStringifiedDynamoDBLockToken(LockToken lockToken)

        {

            if (lockToken == null)

            {

                return null;

            }

​

            var components = new string[]

            {

                lockToken.HolderId,

                lockToken.ResourceId,

                lockToken.LeaseExpiry.ToString("O")

            };

​

            return string.Join(DynamoDBLockTokenComponentsSeparator, components);

        }

    }

​

public class Program

{

    public static void Main()

    {

        /*var t = new LockToken(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DateTimeOffset.UtcNow);

        t = null;

        var l = DynamoDBLockTokenMapper.GetStringifiedDynamoDBLockToken(t);

        Console.WriteLine(l);

        var ttt = DynamoDBLockTokenMapper.GetDynamoDBLockTokenFromString(l);

        Console.WriteLine(t.HolderId);

        Console.WriteLine(t.ResourceId);

        Console.WriteLine(t.LeaseExpiry.ToString("O"));*/

        Console.WriteLine(string.Join("\nv", "ewfw", "ewfew"));

    }

}