myth/db/config.go

package db

import (
	"time"

	"git.chuangxin1.com/cx/myth"
)

// DB error code
const (
	ErrOK                  = 0 // ErrOK ok
	ErrException           = 1 // ErrException exception 异常
	ErrExists              = 2 // ErrExists exists 数据存在
	ErrNotFound            = 3 // ErrNotFound not found 未找到关键数据
	ErrAuthorized          = 4 // ErrAuthorized authorized 未认证
	ErrNotConnect          = 5 // ErrNotConnect connect error 数据库内部连接错误
	ErrDataNotFound        = 6 // data not found 数据未找到
	ErrExpired             = 7 // expired 已过期
	ErrInsufficientBalance = 8 // insufficient balance 余额不足
	ErrCreditLimit         = 9 // Credit Limit 超额
)

// Config config
type Config struct {
	Driver       string
	DNS          string
	MaxOpenConns int
	MaxIdle      int
	MaxLifetime  time.Duration
}

// Reply db exec return insert/update/delete
type Reply struct {
	OK           bool
	Err          error
	LastErr      error
	ErrCode      int
	LastID       int64
	RowsAffected int64
}

// ReplyOk exec ok
func ReplyOk(rowsAffected, lastID int64) Reply {
	var reply Reply

	reply.OK = true
	reply.ErrCode = 0
	reply.LastID = lastID
	reply.RowsAffected = rowsAffected

	return reply
}

// ReplyFaild exec faild
func ReplyFaild(errCode int, err, errText error) (reply Reply) {
	reply.OK = false
	reply.ErrCode = errCode
	reply.LastID = -1
	reply.RowsAffected = -1

	reply.Err = err
	reply.LastErr = errText

	return
}

// ReplyToReplyData db reply to response
func ReplyToReplyData(reply Reply) *myth.ReplyData {
	status := myth.ErrOk
	if !reply.OK {
		switch reply.ErrCode {
		case ErrException:
			status = myth.ErrException
		case ErrExists:
			status = myth.ErrDataExists
		case ErrNotFound:
			status = myth.ErrDataNotFound
		case ErrAuthorized:
			status = myth.ErrUnAuthorized
		case ErrNotConnect:
			status = myth.ErrNotFound
		}
		return myth.ReplyErr(status, reply.LastErr.Error())
	}

	return myth.ReplyOk()
}