45 lines
1.7 KiB
Go
45 lines
1.7 KiB
Go
package shopping_cart
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import (
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"errors"
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"fmt"
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"fusenapi/model/gmodel"
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"fusenapi/utils/format"
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"fusenapi/utils/step_price"
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"github.com/zeromicro/go-zero/core/logx"
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"math"
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"strings"
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)
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// 计算价格
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func CaculateCartPrice(purchaseQuantity int64, productPrice *gmodel.FsProductPrice, fittingPrice int64) (ItemPrice, totalPrice int64, stepNum, stepPrice []int, err error) {
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//阶梯数量切片
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stepNum, err = format.StrSlicToIntSlice(strings.Split(*productPrice.StepNum, ","))
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if err != nil {
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logx.Error(err)
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return 0, 0, nil, nil, errors.New(fmt.Sprintf("failed to parse step number:%d_%d", *productPrice.ProductId, *productPrice.SizeId))
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}
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lenStepNum := len(stepNum)
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//阶梯价格切片
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stepPrice, err = format.StrSlicToIntSlice(strings.Split(*productPrice.StepPrice, ","))
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if err != nil {
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logx.Error(err)
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return 0, 0, nil, nil, errors.New(fmt.Sprintf("failed to parse step price:%d_%d", *productPrice.ProductId, *productPrice.SizeId))
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}
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lenStepPrice := len(stepPrice)
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if lenStepPrice == 0 || lenStepNum == 0 {
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return 0, 0, nil, nil, errors.New(fmt.Sprintf("step price or step number is not set:%d_%d", *productPrice.ProductId, *productPrice.SizeId))
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}
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//请求的数量
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reqPurchaseQuantity := purchaseQuantity
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//购买箱数
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boxQuantity := int(math.Ceil(float64(reqPurchaseQuantity) / float64(*productPrice.EachBoxNum)))
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//根据数量获取阶梯价格中对应的价格
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itemPrice := step_price.GetCentStepPrice(boxQuantity, stepNum, stepPrice)
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//如果有配件，单价也要加入配件价格
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itemPrice += fittingPrice
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//单个购物车总价
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totalPrice = itemPrice * reqPurchaseQuantity
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return itemPrice, totalPrice, stepNum, stepPrice, nil
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}
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