duoduo/apis/shanghu/pay.go

package shanghu

import (
	"duoduo/apis/common"
	"duoduo/apis/shanghu/models"
	"duoduo/models/shanghu"
	"duoduo/tools"
	"duoduo/tools/app"
	"encoding/xml"
	"errors"
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/go-pay/gopay"
	"github.com/go-pay/gopay/wechat"
	"github.com/shopspring/decimal"
	"net/http"
	"strconv"
	"time"
)

type wechatCallbackResp struct {
	XMLName    xml.Name `xml:"xml"`
	ReturnCode Cdata    `xml:"return_code"`
	ReturnMsg  Cdata    `xml:"return_msg"`
}

type Cdata struct {
	Value string `xml:",cdata"`
}

var (
	successResp = &wechatCallbackResp{ReturnCode: Cdata{Value: "SUCCESS"}, ReturnMsg: Cdata{Value: "OK"}}
	failResp    = &wechatCallbackResp{ReturnCode: Cdata{Value: "FAIL"}, ReturnMsg: Cdata{Value: "数据处理异常"}}
)

func UnifiedOrder(c *gin.Context) {
	var inData models.UnifiedOrderRequest
	var sqlData shanghu.ClientPayTrans

	err := c.ShouldBindJSON(&inData)
	if err != nil {
		app.Error(c, 400, err, err.Error())
		return
	}
	//校验 防止同一笔记录存在
	sqlData.RequestID = inData.RequestId
	if sqlData.GetRequestNum() > 0 {
		app.Error(c, 400, errors.New("交易已存在"), "交易已存在")
		return
	}

	//校验金额
	// 检查微信相关参数
	if !inData.Amount.GreaterThan(decimal.NewFromInt(0)) {
		app.Error(c, 400, errors.New("amount:金额必须大于0"), "amount:金额必须大于0")
		return

	}
	if inData.Amount.Round(2).String() != inData.Amount.String() {
		app.Error(c, 400, errors.New("total_fee:金额最多只能保留两位小数"), "total_fee:金额最多只能保留两位小数")
		return
	}

	//创建支付记录
	sqlData.ClientOpenID = inData.ClientOpenId
	sqlData.RequestID = inData.RequestId
	sqlData.CreatedAt = time.Now()
	sqlData.UpdatedAt = time.Now()
	sqlData.Amount = inData.Amount
	sqlData.OutTradeNo = strconv.FormatInt(inData.MerchantCardId, 10) + strconv.FormatInt(time.Now().UnixNano(), 10)
	sqlData.Status = 1 //未支付
	sqlData.MerchantCardID = inData.MerchantCardId
	_, err = sqlData.Create()
	if err != nil {
		app.Error(c, 400, err, "创建支付失败")
		return
	}
	fmt.Println(sqlData.OutTradeNo)
	bm := make(gopay.BodyMap)
	bm.Set("nonce_str", common.GetRandomString(32))
	bm.Set("body", "商户卡")
	bm.Set("out_trade_no", sqlData.OutTradeNo)
	bm.Set("total_fee", inData.Amount.Mul(decimal.NewFromInt(100)).IntPart())
	bm.Set("spbill_create_ip", "127.0.0.1")
	bm.Set("notify_url", "https://shisanmiao.com/v1/client/pay/callback")
	bm.Set("device_info", "WEB")
	bm.Set("trade_type", "JSAPI")
	bm.Set("sign_type", wechat.SignType_MD5)
	bm.Set("openid", inData.ClientOpenId)

	client := NewWechatService()
	//请求支付下单，成功后得到结果
	wxResp, err := client.UnifiedOrder(c, bm)
	if err != nil {
		app.Error(c, 400, err, "下单失败")
		return
	}

	if wxResp.ReturnCode != "SUCCESS" {
		app.Error(c, 400, errors.New(wxResp.ReturnMsg), "下单失败")
		return
	}
	if wxResp.ResultCode != "SUCCESS" {
		app.Error(c, 400, errors.New(wxResp.ErrCode+"--"+wxResp.ErrCodeDes), "下单失败")
		return
	}

	//merchant, count, err := sqlData.GetOpenIdList(pageSize, pageIndex)
	//if err != nil {
	//	app.Error(c, 500, err, err.Error())
	//	return
	//}
	app.OK(c, wxResp, app.Success)

}

func PayCallBack(c *gin.Context) {
	var payLog shanghu.PayCallbackLog
	var payTrans shanghu.ClientPayTrans
	wxNotify, err := wechat.ParseNotifyToBodyMap(c.Request)
	if err != nil {
		c.XML(http.StatusOK, failResp)
		return
	}

	//通知回调log
	payLog.CallBackLog = wxNotify.JsonBody()
	payLog.ThirdTradeNo = wxNotify.Get("transaction_id")
	payLog.OutTradeNo = wxNotify.Get("out_trade_no")
	payLog.CreatedAt = time.Now()
	payLog.UpdatedAt = time.Now()

	_, err = payLog.Create()
	if err != nil {
		c.XML(http.StatusOK, failResp)
		return
	}

	if wxNotify.Get("return_code") != "SUCCESS" || wxNotify.Get("result_code") != "SUCCESS" {
		payLog.ErrLog = "微信返回错误：" + wxNotify.Get("return_code") + "--" + wxNotify.Get("result_code")
		payLog.UpdateMerchant()
		c.XML(http.StatusOK, failResp)
		return
	}

	//校验金额
	payTrans.OutTradeNo = wxNotify.Get("out_trade_no")
	payTransInfo, err := payTrans.GetPayTransByTradeNo()
	if err != nil {
		payLog.ErrLog = "查询交易信息错误：" + " err=" + err.Error()
		payLog.UpdateMerchant()
		c.XML(http.StatusOK, failResp)
		return
	}
	// 判断金额与支付流水是否一致
	totalFee, err := decimal.NewFromString(wxNotify.Get("total_fee"))
	if err != nil {
		payLog.ErrLog = "解析总金额报错：" + "err=" + err.Error()
		payLog.UpdateMerchant()
		c.XML(http.StatusOK, failResp)
		return
	}
	if !totalFee.Equal(payTransInfo.Amount.Mul(decimal.NewFromInt(100))) {
		payLog.ErrLog = "验证金额报错：total_fee=" + wxNotify.Get("total_fee") + " amount=" + payTransInfo.Amount.String()
		payLog.UpdateMerchant()
		c.XML(http.StatusOK, failResp)
		return
	}
	// 解析支付时间
	timeEnd, err := time.ParseInLocation("20060102150405", wxNotify.Get("time_end"), tools.TimeLocation)
	if err != nil {
		payLog.ErrLog = "付款时间解析出错：err=" + err.Error()
		payLog.UpdateMerchant()
		c.XML(http.StatusOK, failResp)
		return
	}

	payTrans.ThirdTradeNo = wxNotify.Get("transaction_id")
	payTrans.Status = 2 //支付成功
	payTrans.PayTime = timeEnd

	err = payTrans.UpdatePayTransByTradeNo()
	if err != nil {
		payLog.ErrLog = "更新支付状态失败：err=" + err.Error()
		payLog.UpdateMerchant()
		c.XML(http.StatusOK, failResp)
		return
	}

	c.XML(http.StatusOK, successResp)

}

func NewWechatService() *wechat.Client {

	client := wechat.NewClient("wx25357518f710b8ce", "1501641641", "1RKRJBVH4vaRrF0XPW9GX2M3ZSImukIz", true)
	//设置国家
	client.SetCountry(wechat.China)

	return client
}