smart_canteen/app/customer/svc/svc_pay.go

package svc

import (
	"applet/app/customer/md"
	"applet/app/db"
	"applet/app/db/model"
	enum2 "applet/app/enum"
	"applet/app/utils"
	"errors"
	"github.com/gin-gonic/gin"
	"time"
)

func BuyPackage(c *gin.Context, req md.BuyPackageReq) (outTradeNo, tradeNo, total string, err error) {
	user := GetUser(c)
	session := db.Db.NewSession()
	defer session.Close()
	session.Begin()
	if err != nil {
		_ = session.Rollback()
		return
	}

	//1、判断是否为教师
	isTeacher := false
	userIdentityDb := db.UserIdentityDb{}
	userIdentityDb.Set(0)
	userIdentity, err := userIdentityDb.GetUserIdentity(req.UserIdentityId)
	if err != nil {
		return
	}
	if userIdentity == nil {
		err = errors.New("未查询到对应身份记录")
		return
	}
	if userIdentity.Kind == enum2.UserIdentityForCentralKitchenForTeacher {
		isTeacher = true
	}

	//2、计算数据(1:按学期购买 2:按月购买 3:按天购买)
	var totalPrice float64
	var data []*model.CentralKitchenForSchoolUserWithDay
	if req.Kind == 1 {
		totalPrice, data, err = CalcBySchoolTerm(user.Id, isTeacher, req)
		if err != nil {
			return
		}
	}
	if req.Kind == 2 {
		totalPrice, data, err = CalcByMonth(user.Id, isTeacher, req)
		if err != nil {
			return
		}
	}
	if req.Kind == 3 {
		totalPrice, data, err = CalcByDay(user.Id, isTeacher, req)
		if err != nil {
			return
		}
	}
	total = utils.Float64ToStr(totalPrice)

	//3、生成订单号
	outTradeNo = utils.OrderUUID(user.Id)

	//4、请求 alipay.trade.create(统一收单交易创建接口)
	sysCfgDb := db.SysCfgDb{}
	sysCfgDb.Set()
	sysCfg := sysCfgDb.SysCfgFindWithDb(enum2.OpenAlipayAppid, enum2.OpenAlipayAppPrivateKey, enum2.OpenAlipayPublicKey, enum2.JsapiPayAppAutToken)
	err, resp := CurlAlipayTradeCreate(md.CurlAlipayTradeCreateReq{
		Config: struct {
			PayAliAppId      string `json:"pay_ali_app_id" binding:"required" label:"支付宝开放平台-第三方应用-appid"`
			PayAliPrivateKey string `json:"pay_ali_private_key" binding:"required" label:"支付宝开放平台-第三方应用-接口加签-应用私钥"`
			PayAliPublicKey  string `json:"pay_ali_public_key" binding:"required" label:"支付宝开放平台-第三方应用-接口加签-支付宝公钥"`
		}{
			PayAliAppId:      sysCfg[enum2.OpenAlipayAppid],
			PayAliPrivateKey: sysCfg[enum2.OpenAlipayAppPrivateKey],
			PayAliPublicKey:  sysCfg[enum2.OpenAlipayPublicKey],
		},
		BuyerId:      user.UserId,
		TotalAmount:  total,
		OutTradeNo:   outTradeNo,
		Subject:      "购买食堂套餐",
		AppAuthToken: sysCfg[enum2.JsapiPayAppAutToken],
	})
	if err != nil {
		return
	}

	//5、插入订单记录
	now := time.Now()
	centralKitchenForSchoolPackageOrd := db.CentralKitchenForSchoolPackageOrd{}
	centralKitchenForSchoolPackageOrd.Set(outTradeNo)
	_, err = centralKitchenForSchoolPackageOrd.CentralKitchenForSchoolPackageOrdInsertBySession(session, &model.CentralKitchenForSchoolPackageOrd{
		EnterpriseId:   req.EnterpriseId,
		Uid:            user.Id,
		UserIdentityId: req.UserIdentityId,
		TotalPrice:     total,
		Kind:           req.Kind,
		OutTradeNo:     outTradeNo,
		TradeNo:        resp.TradeNo,
		State:          enum2.CentralKitchenForSchoolPackageOrdStateForWait,
		OrdState:       enum2.CentralKitchenForSchoolPackageOrdOrdStateForWait,
		ReqContent:     string(utils.Serialize(req)),
		WithDayData:    string(utils.Serialize(data)),
		CreateAt:       now.Format("2006-01-02 15:04:05"),
		UpdateAt:       now.Format("2006-01-02 15:04:05"),
	})
	if err != nil {
		_ = session.Rollback()
		return
	}
	session.Commit()
	tradeNo = resp.TradeNo
	return
}