feat: payjs service is ready

api/service/payment/payjs_service.go

@@ -0,0 +1,81 @@
+package payment
+
+import (
+	"chatplus/core/types"
+	"chatplus/utils"
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"sort"
+	"strings"
+)
+
+type PayJS struct {
+	config *types.JPayConfig
+}
+
+func NewPayJS(appConfig *types.AppConfig) *PayJS {
+	return &PayJS{
+		config: &appConfig.JPayConfig,
+	}
+}
+
+type JPayReq struct {
+	TotalFee   int    `json:"total_fee"`
+	OutTradeNo string `json:"out_trade_no"`
+	Body       string `json:"body"`
+	NotifyURL  string `json:"notify_url"`
+}
+
+func sign(params url.Values, priKey string) string {
+	params.Del(`sign`)
+	var keys = make([]string, 0, 0)
+	for key := range params {
+		if params.Get(key) != `` {
+			keys = append(keys, key)
+		}
+	}
+	sort.Strings(keys)
+
+	var pList = make([]string, 0, 0)
+	for _, key := range keys {
+		var value = strings.TrimSpace(params.Get(key))
+		if len(value) > 0 {
+			pList = append(pList, key+"="+value)
+		}
+	}
+	var src = strings.Join(pList, "&")
+	src += "&key=" + priKey
+
+	md5bs := md5.Sum([]byte(src))
+	md5res := hex.EncodeToString(md5bs[:])
+	return strings.ToUpper(md5res)
+}
+
+func (pj *PayJS) Pay(param JPayReq) (string, error) {
+	var p = url.Values{}
+	encode := utils.JsonEncode(param)
+	m := make(map[string]interface{})
+	_ = utils.JsonDecode(encode, &m)
+	for k, v := range m {
+		p.Add(k, fmt.Sprintf("%v", v))
+	}
+	p.Add("mchid", pj.config.AppId)
+
+	p.Add("sign", sign(p, pj.config.PrivateKey))
+
+	cli := http.Client{}
+	r, err := cli.PostForm(pj.config.ApiURL, p)
+	if err != nil {
+		return "", err
+	}
+	defer r.Body.Close()
+	bs, err := io.ReadAll(r.Body)
+	if err != nil {
+		return "", err
+	}
+	return string(bs), nil
+}