fusenapi/server/shopping-cart/internal/logic/addtocartlogic.go

package logic

import (
	"errors"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"gorm.io/gorm"

	"context"

	"fusenapi/server/shopping-cart/internal/svc"
	"fusenapi/server/shopping-cart/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type AddToCartLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewAddToCartLogic(ctx context.Context, svcCtx *svc.ServiceContext) *AddToCartLogic {
	return &AddToCartLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 处理进入前逻辑w,r
// func (l *AddToCartLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }

func (l *AddToCartLogic) AddToCart(req *types.AddToCartReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	if !userinfo.IsUser() {
		return resp.SetStatusWithMessage(basic.CodeUnAuth, "please sign in before add to shopping cart")
	}
	//校验参数
	if err := l.AddToCartParamVerify(req); err != nil {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, err.Error())
	}
	//获取产品信息
	productInfo, err := l.svcCtx.AllModels.FsProduct.FindOne(l.ctx, req.ProductId)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeDbRecordNotFoundErr, "the product is not exists")
		}
		logx.Error("获取产品信息错误:", err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get product info")
	}
	//获取模板信息
	templateInfo, err := l.svcCtx.AllModels.FsProductTemplateV2.FindOne(l.ctx, req.TemplateId)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeDbRecordNotFoundErr, "the template is not exists")
		}
		logx.Error("获取模板信息错误:", err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get template info")
	}
	if *templateInfo.IsDel == 1 {
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "the template is deleted")
	}
	if *templateInfo.Status != 1 {
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "the template`s status is unNormal")
	}
	//获取模型信息
	modelInfo, err := l.svcCtx.AllModels.FsProductModel3d.FindOne(l.ctx, *templateInfo.ModelId)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeDbRecordNotFoundErr, "the template`s model is not exists")
		}
		logx.Error("获取模型信息错误:", err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get template`s model info")
	}
	//模型里面的size_id是否跟传入的size_id匹配
	if req.SizeId != *modelInfo.SizeId {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "param size_id is not match  model`s size_id")
	}
	//获取尺寸信息
	sizeInfo, err := l.svcCtx.AllModels.FsProductSize.FindOne(l.ctx, req.SizeId)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "the size is not exists")
		}
		logx.Error("获取尺寸信息错误:", err)
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "failed to get size info")
	}
	//状态
	if *sizeInfo.Status != 1 {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "size info status is not normal")
	}
	return resp.SetStatus(basic.CodeOK)
}

// 参数校验
func (l *AddToCartLogic) AddToCartParamVerify(req *types.AddToCartReq) error {
	if req.ProductId <= 0 {
		return errors.New("invalid param:product_id")
	}
	if req.SizeId <= 0 {
		return errors.New("invalid param:size_id")
	}
	if req.TemplateId <= 0 {
		return errors.New("invalid param:template_id")
	}
	if req.PurchaseQuantity <= 0 {
		return errors.New("invalid param:purchase_quantity")
	}
	return nil
}

// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
// func (l *AddToCartLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
// // httpx.OkJsonCtx(r.Context(), w, resp)
// }