11

utils/shopping_cart/caculate_cart_price.go

@@ -0,0 +1,21 @@
+package shopping_cart
+
+import (
+	"fusenapi/utils/step_price"
+	"math"
+)
+
+// 计算价格
+func CaculateCartPrice(purchaseQuantity int64, stepPrice, stepNum []int, fittingPrice, eachBoxNum int64) (ItemPrice, totalPrice int64) {
+	//请求的数量
+	reqPurchaseQuantity := purchaseQuantity
+	//购买箱数
+	boxQuantity := int(math.Ceil(float64(reqPurchaseQuantity) / float64(eachBoxNum)))
+	//根据数量获取阶梯价格中对应的价格
+	itemPrice := step_price.GetCentStepPrice(boxQuantity, stepNum, stepPrice)
+	//如果有配件，单价也要加入配件价格
+	itemPrice += fittingPrice
+	//单个购物车总价
+	totalPrice = itemPrice * reqPurchaseQuantity
+	return itemPrice, totalPrice
+}