添加小程序获取红包封面接口 (#760)

* ADD 获取红包封面

* Update redpacketcover.go

* MOD 修改为统一错误方法

* Update go.yml

.github/workflows/go.yml

@@ -10,7 +10,7 @@ jobs:
   golangci:
     strategy:
       matrix:
-        go-version: [ '1.16','1.17','1.18','1.19','1.20','1.21.4' ]
+        go-version:  [ '1.16','1.17','1.18','1.19','1.20','1.21.4' ]
     name: golangci-lint
     runs-on: ubuntu-latest
     steps:

miniprogram/miniprogram.go

@@ -15,6 +15,7 @@ import (
 	"github.com/silenceper/wechat/v2/miniprogram/order"
 	"github.com/silenceper/wechat/v2/miniprogram/privacy"
 	"github.com/silenceper/wechat/v2/miniprogram/qrcode"
+	"github.com/silenceper/wechat/v2/miniprogram/redpacketcover"
 	"github.com/silenceper/wechat/v2/miniprogram/riskcontrol"
 	"github.com/silenceper/wechat/v2/miniprogram/security"
 	"github.com/silenceper/wechat/v2/miniprogram/shortlink"
@@ -155,3 +156,8 @@ func (miniProgram *MiniProgram) GetShipping() *order.Shipping {
 func (miniProgram *MiniProgram) GetMiniDrama() *minidrama.MiniDrama {
 	return minidrama.NewMiniDrama(miniProgram.ctx)
 }
+
+// GetRedPacketCover 小程序微信红包封面 API
+func (miniProgram *MiniProgram) GetRedPacketCover() *redpacketcover.RedPacketCover {
+	return redpacketcover.NewRedPacketCover(miniProgram.ctx)
+}

miniprogram/redpacketcover/redpacketcover.go

@@ -0,0 +1,59 @@
+package redpacketcover
+
+import (
+	"fmt"
+
+	"github.com/silenceper/wechat/v2/miniprogram/context"
+	"github.com/silenceper/wechat/v2/util"
+)
+
+const (
+	getRedPacketCoverURL = "https://api.weixin.qq.com/redpacketcover/wxapp/cover_url/get_by_token?access_token=%s"
+)
+
+// RedPacketCover struct
+type RedPacketCover struct {
+	*context.Context
+}
+
+// NewRedPacketCover 实例
+func NewRedPacketCover(context *context.Context) *RedPacketCover {
+	redPacketCover := new(RedPacketCover)
+	redPacketCover.Context = context
+	return redPacketCover
+}
+
+// GetRedPacketCoverRequest 获取微信红包封面参数
+type GetRedPacketCoverRequest struct {
+	// openid 可领取用户的openid
+	OpenID string `json:"openid"`
+	// ctoken 在红包封面平台获取发放ctoken（需要指定可以发放的appid）
+	CToken string `json:"ctoken"`
+}
+
+// GetRedPacketCoverResp 获取微信红包封面
+type GetRedPacketCoverResp struct {
+	util.CommonError
+	Data struct {
+		URL string `json:"url"`
+	} `json:"data"` // 唯一请求标识
+}
+
+// GetRedPacketCoverURL 获得指定用户可以领取的红包封面链接。获取参数ctoken参考微信红包封面开放平台
+// 文档地址： https://developers.weixin.qq.com/miniprogram/dev/OpenApiDoc/red-packet-cover/getRedPacketCoverUrl.html
+func (cover *RedPacketCover) GetRedPacketCoverURL(coderParams GetRedPacketCoverRequest) (res GetRedPacketCoverResp, err error) {
+	accessToken, err := cover.GetAccessToken()
+	if err != nil {
+		return
+	}
+
+	uri := fmt.Sprintf(getRedPacketCoverURL, accessToken)
+	response, err := util.PostJSON(uri, coderParams)
+	if err != nil {
+		return
+	}
+
+	// 使用通用方法返回错误
+	err = util.DecodeWithError(response, &res, "GetRedPacketCoverURL")
+	return
+}