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

namespace Core.Mes.Client.Comm.Format
{
    /// <summary>
    /// JSON格式转换类
    /// </summary>
    public class JSONFormat
    {
        /// <summary>
        /// 将实体对象转换成JSON格式字符串
        /// </summary>
        /// <param name="obj">需转换的实体对象</param>
        /// <returns>JSON格式字符串</returns>
        public static string Format(Object obj)
        {
            StringBuilder formatStr = new StringBuilder();
            Type type = obj.GetType();
            formatStr.Append("{");
            PropertyInfo[] properties = type.GetProperties();
            string name = "";
            Object value = null;
            for (int i = 0; i < properties.Length; i++)
            {
                value = properties[i].GetValue(obj, null);
                name = properties[i].Name;
                formatStr.Append("\"" + ((name != null && name.Length > 0) ? (name.Substring(0, 1).ToLower() + name.Substring(1)) : "") + "\":\"" + escape(value != null ? value.ToString() : "") + "\",");
            }
            formatStr.Remove(formatStr.Length - 1, 1);
            formatStr.Append("}");
            return formatStr.ToString();
        }

        /// <summary>
        /// json特殊字符转义
        /// </summary>
        /// <param name="json">old json</param>
        /// <returns>new json</returns>
        public static string escape(string json)
        {
            string newJson = "";

            if (!string.IsNullOrEmpty(json))
            {
                newJson = json.Replace("\\", "\\\\").Replace("\r", "\\r").Replace("\n", "\\n").Replace("\"", "\\\"");
            }

            return newJson;
        }
    }
}