/*
 * 临时文件自动存储管理
 * 肖俊
 * 2017-7-11
 * 
 */
using System;
using System.Text;
using System.Windows.Forms;

namespace AllBase
{
    public class TempFileReadWritex
    {
        private static string MainPath = Application.StartupPath + "\\temp\\";
        /// <summary>
        /// 写入临时文件
        /// </summary>
        /// <param name="id">ID</param>
        /// <param name="type">类型：content / desc</param>
        /// <param name="content">内容</param>
        public static void Write(long id, string type, string content)
        {
            string path = MainPath + type + "\\" + (id % 1024) + "\\";
            FileBase.DirectoryCreate(path);
            string file = path + id + ".tjm";
            FileBase.WriteAllText(file, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss\r\n"));
            FileBase.AppendAllText(file, content, Encoding.UTF8);
        }

        /// <summary>
        /// 读取临时文件
        /// </summary>
        /// <param name="id">ID</param>
        /// <param name="type">类型：content / desc</param>
        /// <param name="hadFile">读取成功</param>
        /// <returns></returns>
        public static string Read(long id, string type, out bool hadFile)
        {
            return Read(id, type, out hadFile, BaseClass.TempSecond);
        }

        /// <summary>
        /// 读取临时文件
        /// </summary>
        /// <param name="id">ID</param>
        /// <param name="type">类型：content / desc</param>
        /// <param name="hadFile">读取成功</param>
        /// <param name="useTime">过期时间，秒</param>
        /// <returns></returns>
        public static string Read(long id, string type, out bool hadFile, int useTime)
        {
            hadFile = false;
            string path = MainPath + type + "\\" + (id % 1024) + "\\";
            if (!FileBase.Exists(path))
                return null;
            string conent = FileBase.ReadAllText(path);
            if (conent.Length < 21)
                return null;
            string date = conent.Substring(0, 19);
            DateTime saveTime;
            if (!DateTime.TryParse(date, out saveTime))
                return null;
            double second = (DateTime.Now - saveTime).TotalSeconds;
            if (second < useTime)
            {
                hadFile = true;
                return conent.Substring(21);
            }
            return null;
        }
    }
}