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91 lines
2.1 KiB
91 lines
2.1 KiB
package logic
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import (
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"context"
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"healthapi/internal/model"
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"healthapi/internal/svc"
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"healthapi/internal/types"
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"healthapi/pkg/errorx"
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"github.com/zeromicro/go-zero/core/logx"
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)
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type UpdateCartLogic struct {
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logx.Logger
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ctx context.Context
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svcCtx *svc.ServiceContext
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}
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func NewUpdateCartLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UpdateCartLogic {
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return &UpdateCartLogic{
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Logger: logx.WithContext(ctx),
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ctx: ctx,
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svcCtx: svcCtx,
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}
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}
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func (l *UpdateCartLogic) UpdateCart(req *types.UpdateCartReq) (resp *types.CartItem, err error) {
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userID, err := GetUserIDFromCtx(l.ctx)
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if err != nil {
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return nil, errorx.ErrUnauthorized
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}
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var cartItem model.CartItem
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if err := l.svcCtx.DB.Where("id = ? AND user_id = ?", req.Id, userID).First(&cartItem).Error; err != nil {
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return nil, errorx.NewCodeError(404, "购物车项不存在")
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}
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// 获取商品信息
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var product model.Product
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if err := l.svcCtx.DB.First(&product, cartItem.ProductID).Error; err != nil {
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return nil, errorx.NewCodeError(404, "商品不存在")
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}
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price := product.Price
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stock := product.Stock
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skuName := ""
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image := product.MainImage
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// 如果有 SKU
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if cartItem.SkuID > 0 {
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var sku model.ProductSku
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if err := l.svcCtx.DB.First(&sku, cartItem.SkuID).Error; err == nil {
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price = sku.Price
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stock = sku.Stock
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skuName = sku.Name
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if sku.Image != "" {
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image = sku.Image
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}
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}
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}
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// 更新数量
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if req.Quantity > 0 {
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if req.Quantity > stock {
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return nil, errorx.NewCodeError(400, "库存不足")
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}
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cartItem.Quantity = req.Quantity
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}
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// 更新选中状态（使用结构体字段，因为 bool 默认值为 false）
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cartItem.Selected = req.Selected
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if err := l.svcCtx.DB.Save(&cartItem).Error; err != nil {
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return nil, err
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}
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resp = &types.CartItem{
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ID: uint(cartItem.ID),
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ProductID: cartItem.ProductID,
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SkuID: cartItem.SkuID,
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ProductName: product.Name,
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SkuName: skuName,
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Image: image,
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Price: price,
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Quantity: cartItem.Quantity,
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Selected: cartItem.Selected,
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Stock: stock,
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}
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return resp, nil
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}
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