add good_id

plati/goodscategory.go

@@ -181,6 +181,16 @@ type Good struct {
 	Price        float64
 }
 
+func (g *Good) GoodID() int {
+	linkArr := strings.Split(g.GoodLink, "/")
+	if len(linkArr) < 3 {
+		return 0
+	}
+
+	id, _ := strconv.Atoi(linkArr[3])
+	return id
+}
+
 func parseGoodsCategory(r io.Reader) ([]*Good, error) {
 	doc, err := goquery.NewDocumentFromReader(r)
 	if err != nil {