feat 添加pre-sale

bid-pre-sale.go

@@ -0,0 +1,75 @@
+package dw_sdk
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/bytedance/sonic"
+	"github.com/gofiber/fiber/v3/client"
+	"github.com/google/go-querystring/query"
+	"github.com/pkg/errors"
+	"github.com/valyala/fasthttp/fasthttpproxy"
+)
+
+// https://open.dewu.com/#/api/body?apiId=97&id=3&title=%E5%87%BA%E4%BB%B7%E6%9C%8D%E5%8A%A1API
+
+// 预售出价服务客户端
+type PreSaleBidClientImpl struct {
+	cli     *client.Client
+	cfg     PublicConfig
+	baseUrl string
+}
+
+func NewPreSaleBidClient(cfg Config) BidClient {
+	baseUrl := GetUrl(cfg.Public.Env)
+	cli := client.New().SetJSONMarshal(func(v any) ([]byte, error) {
+		return sonic.Marshal(v)
+	}).SetJSONUnmarshal(func(data []byte, v any) error {
+		return sonic.Unmarshal(data, v)
+	}).AddRequestHook(func(c *client.Client, request *client.Request) error {
+		request.SetURL(baseUrl + request.URL())
+		return nil
+	})
+
+	if cfg.Proxy != nil {
+		cli.SetDial(fasthttpproxy.FasthttpHTTPDialer(fmt.Sprintf("%s:%s@%s:%s", cfg.Proxy.User, cfg.Proxy.Pass, cfg.Proxy.Host, cfg.Proxy.Port)))
+	}
+	return &PreSaleBidClientImpl{
+		cli:     cli,
+		cfg:     cfg.Public,
+		baseUrl: baseUrl,
+	}
+}
+
+// 获取平台sku最低价【全款预售】
+const PreSaleLowestPriceUrl = "/dop/api/v1/bidding/normal_pre_sale/lowest_price"
+
+func (a *PreSaleBidClientImpl) LowestPrice(skuId int) (*PublicResponse[LowestPriceResponse], error) {
+	if skuId == 0 {
+		return nil, Err_Params_None
+	}
+	data := LowestPriceReq{
+		PublicParams: PublicParams{
+			AppKey:    a.cfg.Key,
+			Timestamp: time.Now().UnixMilli(),
+		},
+		SkuId: skuId,
+	}
+
+	Sign(&data, a.cfg.Secret)
+	v, _ := query.Values(data)
+	s := v.Encode()
+	r := a.cli.R()
+	defer client.ReleaseRequest(r)
+
+	response, err := r.Get(PreSaleLowestPriceUrl + "?" + s)
+	if err != nil {
+		return nil, errors.Wrapf(Err_Request_Err, "%s err:%v", PreSaleLowestPriceUrl, err)
+	}
+	defer client.ReleaseResponse(response)
+	var resp PublicResponse[LowestPriceResponse]
+	if err = response.JSON(&resp); err != nil {
+		return nil, errors.Wrapf(Err_JSON_UNMarshal, "%s err:%v", PreSaleLowestPriceUrl, err)
+	}
+	return &resp, nil
+}