/// <param name="UserName">用戶名</param>
    /// <param name="PassWord">密碼</param>
    /// <returns>標志：1已存在，2失敗，0成功</returns>
    [WebMethod(Description = "注冊 需要提供合法票據")]
    public int Register(string UserName,string PassWord)
    {
        SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from users where name='" + UserName + "'";
        cmd.Connection = conn;
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.Read())
        {
            return 1;
        }
        dr.Dispose();
        conn.Close();
        cmd.CommandText = "insert into users(name,pass) values(@_name,@_pass)";
        cmd.Connection = conn;
        cmd.Parameters.Add("@_name", SqlDbType.VarChar);
        cmd.Parameters.Add("@_pass", SqlDbType.VarChar);
        cmd.Parameters[0].Value = UserName;
        cmd.Parameters[1].Value = PassWord;
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            return 0;
        }
        catch
        {
            return 2;
        }
        finally
        {
            cmd.Dispose();
            conn.Dispose();
        }
    }
    #endregion

    #region Share

    /// <summary>
    /// 獲取共享文件夾列表
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="author"></param>
    /// <returns></returns>
    [WebMethod(Description = "刷新共享文件 需要提供合法票據")]
    public string GetShareFile(string ticket, string author)
    {
        ///查看加密票是否有效
        if (IsTicketValid(ticket, false))
        {
            ///獲取共享文件夾文件列表
            string Results = ListShow(rootdir + author);
            return Results;
        }
        else return "驗證失敗";
    }

    /// <summary>
    /// 設置共享
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="Folder">路徑</param>
    /// <param name="Accept">接受共享者</param>
    /// <returns>成功返回空，否則返回錯誤信息</returns>
    [WebMethod(Description = "設置共享 需要提供合法票據")]
    public string SetShare(string ticket,string Folder,string Accept)
    {
        if (IsTicketValid(ticket,false))
        {
            string Path = rootdir + FormsAuthentication.Decrypt(ticket).Name + Folder;
            FileInfo file = new FileInfo(Path);
            ///判斷當前是否是文件夾
            if ((file.Attributes & FileAttributes.Directory) != 0)
            {

                SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
                SqlCommand cmd = new SqlCommand("insert into Share(author,ShareName,Accept) values(@author,@ShareName,@Accept)", conn);
                cmd.Parameters.Add("@author", SqlDbType.VarChar);
                cmd.Parameters.Add("@ShareName", SqlDbType.VarChar);
                cmd.Parameters.Add("@Accept", SqlDbType.VarChar);
                cmd.Parameters[0].Value = FormsAuthentication.Decrypt(ticket).Name;
                cmd.Parameters[1].Value = Folder;
                cmd.Parameters[2].Value = Accept;
                conn.Open();
                cmd.ExecuteNonQuery();
                cmd.Dispose();
                conn.Dispose();
                return null;
            }
            else
            {
                return "只有文件夾可以設置共享";
            }
        }
        else return "驗證失敗";
    }

    /// <summary>
    /// 取得當前用戶可用的共享列表
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <returns>成功返回列表，否則返回空</returns>
    [WebMethod(Description = "共享 需要提供合法票據")]
    public string ShowShare(string ticket)
    {
        if (IsTicketValid(ticket,false))
        {
            string Results = string.Empty;
            SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
            SqlCommand cmd = new SqlCommand("select ShareName,author from share where Accept = @Accept", conn);

            cmd.Parameters.Add("@Accept", SqlDbType.VarChar);
            cmd.Parameters[0].Value = FormsAuthentication.Decrypt(ticket).Name;
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read())
            {
                Results += dr["ShareName"].ToString() + "|";
                Results += dr["author"].ToString() + "*";
            }
            cmd.Dispose();
            conn.Dispose();
            return Results;
        }
        else return null;
    }

    /// <summary>
    /// 取得共享文件大小
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="FileName">文件路徑</param>
    /// <returns></returns>
    [WebMethod(Description = "取得共享文件大小 需要提供合法票據")]
    public long GetShareFileSize(string ticket, string FileName)
    {
        if (IsTicketValid(ticket,false))
        {
            string FilePath = rootdir + FileName;

            // check that requested file exists
            if (!File.Exists(FilePath))
                CustomSoapException("File not found", "The file " + FilePath + " does not exist");

            return new FileInfo(FilePath).Length;
        }
        else return 0;
    }

    [WebMethod(Description = "下載共享 需要提供合法票據")]
    public byte[] DownShare(string ticket, string Author, long Offset, int BufferSize)
    {
        if (IsTicketValid(ticket,false))
        {
            string FilePath = rootdir + Author;

            /// check that requested file exists
            if (!File.Exists(FilePath))
                CustomSoapException("File not found", "The file " + FilePath + " does not exist");

            long FileSize = new FileInfo(FilePath).Length;

            /// if the requested Offset is larger than the file, bail out.
            if (Offset > FileSize)
                CustomSoapException("Invalid Download Offset", String.Format("The file size is {0}, received request for offset {1}", FileSize, Offset));

            /// open the file to return the requested chunk as a byte[]
            byte[] TmpBuffer;
            int BytesRead;
            using (FileStream fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read))
            {
                fs.Seek(Offset, SeekOrigin.Begin);	/// this is relevent during a retry. otherwise, it just seeks to the start
                TmpBuffer = new byte[BufferSize];
                BytesRead = fs.Read(TmpBuffer, 0, BufferSize);	/// read the first chunk in the buffer (which is re-used for every chunk)
            }
            if (BytesRead != BufferSize)
            {
                /// the last chunk will almost certainly not fill the buffer, so it must be trimmed before returning
                byte[] TrimmedBuffer = new byte[BytesRead];
                Array.Copy(TmpBuffer, TrimmedBuffer, BytesRead);
                return TrimmedBuffer;
            }
            else
                return TmpBuffer;
        }
        else return null;
    }

    /// <summary>
    /// 屬性
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="Name">路徑</param>
    /// <returns>成功返回屬性值,否則返回空</returns>
    [WebMethod(Description = "屬性 需要提供合法票據")]
    public string ShareAttribute(string ticket, string Name)
    {
        if (IsTicketValid(ticket,false))
        {
            string Results = string.Empty;
            string Path = rootdir + FormsAuthentication.Decrypt(ticket).Name + Name;
            UploadPath = rootdir + FormsAuthentication.Decrypt(ticket).Name;
            DirectoryInfo dirAll = new DirectoryInfo(UploadPath);
            long CurrSize = DirSize(dirAll);
            long AllowSize = CheckSize(FormsAuthentication.Decrypt(ticket).Name);
            Results += "總共:" + FormatFileSize(AllowSize);
            Results += "|已用:" + FormatFileSize(CurrSize);
            Results += "|剩余:" + FormatFileSize(AllowSize - CurrSize);

            Results += "|創建時間:" + File.GetCreationTime(Path);
            Results += "|修改時間:" + File.GetLastWriteTime(Path);

            FileInfo file = new FileInfo(Path);
            DirectoryInfo dir = new DirectoryInfo(Path);
            ///判斷當前是否是文件夾
            if ((file.Attributes & FileAttributes.Directory) != 0)
            {
                ///如果是文件夾
                Results += "|大小:" + FormatFileSize(DirSize(dir));
                int DirCount = dir.GetDirectories().GetLength(0);
                int FileCount = dir.GetFiles().GetLength(0);
                Results += "|共有文件夾 " + DirCount.ToString() + " 個|";
                Results += "文件 " + FileCount.ToString() + " 個";
            }
            else
            {
                ///如果是文件
                Results += "|大小:" + FormatFileSize(GetFileSize(ticket, Name));
            }
            return Results;
        }
        else return null;
    }

    #endregion

    #region Role
    /// <summary>
    /// 設置空間大小
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="size">空間大小 單位(MB)</param>
    /// <returns>成功返回空，否則返回錯誤信息</returns>
    [WebMethod(Description = "設置空間大小 需要提供合法票據并且是管理員身份")]
    public string SetSpaceSize(string ticket,int size)
    {
        if (IsTicketValid(ticket, true))
        {
            SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
            conn.Open();
            SqlCommand cmd = new SqlCommand("update users set disksize=@disksize where name=@name", conn);
            cmd.Parameters.Add("@disksize", SqlDbType.Int);
            cmd.Parameters.Add("@name", SqlDbType.VarChar);
            cmd.Parameters[0].Value = size;
            cmd.Parameters[1].Value = FormsAuthentication.Decrypt(ticket).Name;

            try
            {
                cmd.ExecuteNonQuery();
                return null;
            }
            catch
            {
                return "設置失敗";
            }
        }
        else return "驗證失敗";
    }

    /// <summary>
    /// 設置下載速度
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="size">下載速度 單位(KB)</param>
    /// <returns>成功返回空，否則返回錯誤信息</returns>
    [WebMethod(Description = "設置下載速度 需要提供合法票據并且是管理員身份")]
    public string SetSpeed(string ticket, int speed)
    {
        if (IsTicketValid(ticket, true))
        {
            SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
            conn.Open();
            SqlCommand cmd = new SqlCommand("update users set speed=@speed where name=@name", conn);
            cmd.Parameters.Add("@speed", SqlDbType.Int);
            cmd.Parameters.Add("@name", SqlDbType.VarChar);
            cmd.Parameters[0].Value = speed;
            cmd.Parameters[1].Value = FormsAuthentication.Decrypt(ticket).Name;

            try
            {
                cmd.ExecuteNonQuery();
                return null;
            }
            catch
            {
                return "設置失敗";
            }
        }
        else return "驗證失敗";
    }
    #endregion
}