using System;
using System.Collections.Generic;
using System.Text;

namespace Darkleo.Com.Helper
{

    /// <summary>
    /// Guid mit kurzerer Darstellung 22 Zeichen
    /// SmallGuid sg = SmallGuid.NewSmallGuid();
    /// Console.WriteLine("SmallGuid:" + sg);
    /// Console.WriteLine("Guid:" + (Guid)sg);
    /// </summary>
    public class SmallGuid
    {
        private Guid guid;
        private string smallString;
        public SmallGuid()
        {
            this.guid = new Guid();
            this.smallString = SmallGuid.GuidToString(guid);
        }
        public SmallGuid(Guid guid)
        {
            this.guid = guid;
            this.smallString = SmallGuid.GuidToString(guid);
        }
        public SmallGuid(string smallString)
        {
            this.guid = SmallGuid.StringToGuid(smallString);
            this.smallString = smallString;
        }

        public Guid Guid
        {
            get { return guid; }
        }

        public string SmallString
        {
            get { return smallString; }
        }

        public override string ToString()
        {
            return smallString;
        }



        public static implicit operator Guid(SmallGuid item)
        {
            return item.Guid;
        }

        public static implicit operator string(SmallGuid item)
        {
            return item.SmallString;
        }

        public static SmallGuid NewSmallGuid()
        {
            return new SmallGuid(Guid.NewGuid());
        }

        public static string GuidToString(Guid guid)
        {
            string ret = string.Empty;
            byte[] b = guid.ToByteArray();
            ret = Convert.ToBase64String(b).Remove(22);
            return ret;
        }

        public static Guid StringToGuid(string smallString)
        {
            Guid ret = new Guid();
            byte[] b = Convert.FromBase64String(smallString + "==");
            ret = new Guid(b);
            return ret;
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            Guid g = new Guid("11111111111111111111111111111111");
            Console.WriteLine("Guid: " + g);
            Console.WriteLine("Guid.Length: " + g.ToString().Length);
            SmallGuid sg = new SmallGuid(g);
            Console.WriteLine("SmallGuid: " + sg.SmallString);
            Console.WriteLine("SmallGuid.Length: " + sg.SmallString.Length);
            Console.WriteLine("Cast to Guid: "+(Guid)sg);
            Console.WriteLine("Guid(N).Length: " + ((Guid)sg).ToString("N").Length);
            Console.ReadKey();

        }
    }
}