发红包

mch/paytool/redpack.go

@@ -0,0 +1,125 @@
+package pay
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/astaxie/beego"
+	"github.com/yaotian/gowechat/mch/base"
+	"github.com/yaotian/gowechat/util"
+)
+
+//官方文档： https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter=13_4&index=3
+
+const (
+	//SceneIDPromotion 商品促销
+	SceneIDPromotion = "PRODUCT_1"
+
+	//SceneIDLuckyDraw 抽奖
+	SceneIDLuckyDraw = "PRODUCT_2"
+
+	//SceneIDPrize 虚拟物品兑奖
+	SceneIDPrize = "PRODUCT_3"
+
+	//SceneIDBenefit 企业内部福利
+	SceneIDBenefit = "PRODUCT_4"
+
+	//SceneIDAgentBonous 渠道分润
+	SceneIDAgentBonous = "PRODUCT_5"
+
+	//SceneIDAgentInsurance 保险回馈
+	SceneIDAgentInsurance = "PRODUCT_6"
+
+	//SceneIDLottery 彩票派奖
+	SceneIDLottery = "PRODUCT_7"
+
+	//SceneIDTax 税务刮奖
+	SceneIDTax = "PRODUCT_8"
+)
+
+//RedPackInput 发红包的配置
+type RedPackInput struct {
+	ToOpenID string //接红包的OpenID
+	MoneyFen int    //分为单位
+
+	SendName string //商户名称，String(32) 谁发的红包，一般为发红包的单位
+	Wishing  string //红包祝福语 String(128) “感谢您参加猜灯谜活动，祝您元宵节快乐！”
+	ActName  string //活动名称 String(32) 猜灯谜抢红包活动
+	Remark   string //备注 String(256)
+
+	IP string
+
+	//非必填，但大于200元，此必填, 有8个选项可供选择
+	SceneID string
+}
+
+func (m *RedPackInput) Check() (isGood bool, err error) {
+	if input.ToOpenID == "" || input.MoneyFen == 0 || input.SendName == "" || input.Wishing == "" || input.ActName == "" || input.Remark == "" || input.IP == "" {
+		err = fmt.Errorf("%s", "Input有必填项没有值")
+		return
+	}
+
+	if input.MoneyFen >= 200*100 && input.SceneID == "" {
+		err = fmt.Errorf("%s", "大于200元的红包，必须设置SceneID")
+		return
+	}
+	return true, nil
+}
+
+//SendRedPack 发红包
+func (c *PayTool) SendRedPack(input RedPackInput) (isSuccess bool, err error) {
+	if isGood, err := input.Check(); !isGood {
+		return false, err
+	}
+
+	now := time.Now()
+	dayStr := beego.Date(now, "Ymd")
+
+	billno := c.MchID + dayStr + util.RandomStr(10)
+
+	var signMap = make(map[string]string)
+	signMap["nonce_str"] = util.RandomStr(5)
+	signMap["mch_billno"] = billno //mch_id+yyyymmdd+10位一天内不能重复的数字
+	signMap["mch_id"] = c.MchID
+	signMap["wxappid"] = c.AppID
+	signMap["send_name"] = input.SendName
+	signMap["re_openid"] = input.ToOpenID
+	signMap["total_amount"] = util.ToStr(input.MoneyFen)
+	signMap["total_num"] = "1"
+	signMap["wishing"] = input.Wishing
+	signMap["client_ip"] = input.IP
+	signMap["act_name"] = input.ActName
+	signMap["remark"] = input.Remark
+	signMap["sign"] = base.Sign(signMap, c.MchAPIKey, nil)
+
+	respMap, err := c.SendRedPack(signMap)
+	if err != nil {
+		return false, err
+	}
+
+	result_code, ok := respMap["result_code"]
+	if !ok {
+		err = errors.New("no result_code")
+		return false, err
+	}
+
+	if result_code != "SUCCESS" {
+		err = errors.New("result code is not success")
+		return false, err
+	}
+
+	mch_billno, ok := respMap["mch_billno"]
+	if !ok {
+		err = errors.New("no mch_billno")
+		return false, err
+	}
+
+	if billno != mch_billno {
+		err = errors.New("billno is not correct")
+		beego.Error(err)
+		return false, err
+	}
+
+	return true, nil
+}