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

namespace JwKdsV.Core.Utils
{
    public class SafeBase64Utils
    {
        public static string ToBase64(byte[] bytes)
        {
            string b64 = Convert.ToBase64String(bytes);
            return new StringBuilder(b64).Replace('+' , '-').Replace('/' , '_').Replace('=' , '.').ToString();
        }

        /// <summary>
		/// Encodes string into a format that is safe for use with ASCII or HTTP query strings
		/// </summary>
		public static string ToBase64(string plainString)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(plainString);
            return ToBase64(bytes);
        }

        public static string Base64ToSafeBase64(string base64)
        {
            return new StringBuilder(base64).Replace('+' , '-').Replace('/' , '_').Replace('=' , '.').ToString();
        }

        public static string SafeBase64ToBase64(string safebase64)
        {
            return new StringBuilder(safebase64).Replace('-' , '+').Replace('_' , '/').Replace('.' , '=').ToString();
        }

        /// <summary>
        /// Gives you back your original string from StringToHttpSafeBase64
        /// </summary>
        public static string FromSafeBase64(string base64String)
        {
            string b64 = new StringBuilder(base64String).Replace('-' , '+').Replace('_' , '/').Replace('.' , '=').ToString();
            byte[] bytes = Convert.FromBase64String(b64);
            return Encoding.UTF8.GetString(bytes , 0 , bytes.Length);
        }

    }
}