first commit

internal/service/goods.go

@@ -0,0 +1,84 @@
+package service
+
+import (
+	"context"
+
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/dto"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqldao"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqlmodel"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/errcode"
+)
+
+// GoodsService 商品业务服务。
+type GoodsService struct {
+	goodsDao *mysqldao.GoodsDao
+}
+
+// NewGoodsService 创建商品服务。
+func NewGoodsService() *GoodsService {
+	return &GoodsService{
+		goodsDao: mysqldao.NewGoodsDao(),
+	}
+}
+
+// GetByCode 按商品编码查询商品（下架返回错误）。
+func (s *GoodsService) GetByCode(ctx context.Context, request *dto.GoodsGetByCodeRequest) (*dto.GoodsGetByCodeResponse, *errcode.Error) {
+	ctx, span := global.Tracer.Start(ctx, "svc.GoodsGetByCode")
+	defer span.End()
+
+	goods, err := s.goodsDao.GoodsGetByCode(ctx, request.GoodsCode)
+	if err != nil {
+		if isNotFound(err) {
+			return nil, errcode.GoodsNotFound
+		}
+		return nil, errcode.DatabaseError
+	}
+	if goods.Status != GoodsStatusOnShelf {
+		return nil, errcode.GoodsOffShelf
+	}
+	response := buildGoodsResponse(goods)
+	return &response, nil
+}
+
+// List 分页查询上架商品（按类型过滤）。
+func (s *GoodsService) List(ctx context.Context, request *dto.GoodsListRequest) (*dto.GoodsListResponse, *errcode.Error) {
+	ctx, span := global.Tracer.Start(ctx, "svc.GoodsList")
+	defer span.End()
+
+	page, pageSize := normalizePage(request.Page, request.PageSize)
+
+	list, total, err := s.goodsDao.GoodsList(ctx, request.GoodsType, page, pageSize)
+	if err != nil {
+		return nil, errcode.DatabaseError
+	}
+
+	items := make([]dto.GoodsGetByCodeResponse, 0, len(list))
+	for i := range list {
+		items = append(items, buildGoodsResponse(&list[i]))
+	}
+
+	return &dto.GoodsListResponse{
+		PageResponse: dto.PageResponse{Total: total, Page: page, PageSize: pageSize},
+		List:         items,
+	}, nil
+}
+
+// buildGoodsResponse 将商品模型映射为响应。注意 dto.UploadQuota 对应 model.CosQuota。
+func buildGoodsResponse(g *mysqlmodel.Goods) dto.GoodsGetByCodeResponse {
+	return dto.GoodsGetByCodeResponse{
+		ID:               g.ID,
+		GoodsCode:        g.GoodsCode,
+		GoodsName:        g.GoodsName,
+		GoodsType:        g.GoodsType,
+		Price:            g.Price,
+		DiscountPrice:    g.DiscountPrice,
+		MemberDays:       g.MemberDays,
+		UploadQuota:      g.CosQuota,
+		AIRecommendQuota: g.AIRecommendQuota,
+		ClosetShareQuota: g.ClosetShareQuota,
+		OutfitShareQuota: g.OutfitShareQuota,
+		ValidDays:        g.ValidDays,
+		Description:      g.Description,
+	}
+}