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

namespace IStation.Extensions
{
    /// <summary>
    /// 字符串拓展
    /// </summary>
    public static class StringExtension
    {
        /// <summary>
        ///  对字符串进行进行 Base64 方式编码（加密）
        /// </summary>
        /// <param name="this">扩展对象</param>
        /// <returns>编码后的字符串</returns>
        public static string EncryptByBase64(this string @this, Encoding encoding = null)
        {
            if (encoding == null)
                encoding = Encoding.Default;
            byte[] bytes = encoding.GetBytes(@this);
            return Convert.ToBase64String(bytes);
        }

        /// <summary>
        ///  对字符串进行进行 Base64 方式解码（解密）
        /// </summary>
        /// <param name="this">扩展对象</param>
        /// <returns>解码后的字符串</returns>
        public static string DecryptByBase64(this string @this, Encoding encoding = null)
        {
            if (encoding == null)
                encoding = Encoding.Default;
            byte[] bytes = Convert.FromBase64String(@this);
            return encoding.GetString(bytes);
        }
    }
}