type Response struct {
  Code int `json:"code" bson:"code"`
}
type bodyLogWriter struct {
  gin.ResponseWriter
  body *bytes.Buffer
}


func (w bodyLogWriter) Write(b []byte) (int, error) {
  w.body.Write(b)
  return w.ResponseWriter.Write(b)
}


const (
  HttpRespSuccessCode = 0
)


// Logger 日志記錄
func Logger() gin.HandlerFunc {
  return func(c *gin.Context) {
   //備份請求體
    blw := &bodyLogWriter{body: bytes.NewBufferString(""), ResponseWriter: c.Writer}
    c.Writer = blw
    //繼續(xù)執(zhí)行請求
    c.Next()
    //判斷記錄標志
    needToLog, ok := c.Get("need_to_log")
    if !ok {
      log.Warn("獲取是否需要記錄日志失敗")
      return
    }
    if !needToLog.(bool) {
      return
    }
    //也可以在這兒加入白名單 判斷是否是不需記錄的URL
    /*
      url := c.Request.RequestURI
      if strings.Index(url, "logout") > -1 ||
        strings.Index(url, "login") > -1 {
        return
      }
    */
    // 獲取請求的HTTP狀態(tài)碼
    statusCode := c.Writer.Status()
    // 獲取請求IP
    clientIP := common.GetClientIP(c)
    isSuccess := false
    //若HTTP狀態(tài)碼為200
    if c.Writer.Status() == http.StatusOK {
      var resp Response
      // 獲取返回的數據
      err := json.Unmarshal(blw.body.Bytes(), &resp)
      if err != nil {
        log.Warn("Logs Operation Unmarshal Error: %s", err.Error())
        return
      }
      //判斷操作是否成功 需結合業(yè)務函數的返回值結構
      if resp.Code == HttpRespSuccessCode {
        isSuccess = true
      }
    }
    if statusCode != http.StatusNotFound {
      SetDBLog(c, clientIP, isSuccess)
    }
  }
}


// SetDBLog 寫入日志表
func SetDBLog(c *gin.Context, clientIP string, status bool) {
  user, ok := c.Get("user")
  if !ok {
    log.Warn("審計日志-獲取用戶名失敗")
  }
  //日志格式化 然后入庫
  logInfo := table.Logs{}
  //構造日志ID 可使用其他方式替代
  logInfo.LogID = NewNanoid()
  if user != nil {
    logInfo.Username = user.(string)
  }
  operatorType, exist := c.Get("operation_type")
  if exist {
    logInfo.OperationType = operatorType.(string)
  }
  logInfo.IP = clientIP
  operation, exist := c.Get("operation")
  if exist {
    logInfo.Description = operation.(string)
  }
  if status == true {
    logInfo.Description = logInfo.Description + "成功"
  } else {
    logInfo.Description = logInfo.Description + "失敗"
  }
  //日志入庫
  err := InsertLog(logInfo)
  if err != nil {
    log.Warn("InsertLog %s error, %s", logInfo.LogID, err.Error())
  }
}


// InsertLog 插入log
func InsertLog(logs table.Logs) error {


}

func (User) UserLoginOut(c *ctx.Context) {
  //設定記錄日志標志
  c.Set("need_to_log", true)
  //設定操作類型
  c.Set("operation_type", "用戶退出登錄")
  //設定具體操作
  c.Set("operation", "用戶退出登錄")
  c.Success()
}

//設定路由組
  UserRouter := apiV1Group.Group("users")
  //為路由組應用中間件
  UserRouter.Use(middleware.Logger())