feat: product number

services/product/internal/logic/numberLogic.go

@@ -0,0 +1,80 @@
+package logic
+
+import (
+	"context"
+	"lone-services/pkg/modelbase"
+	"lone-services/pkg/utils"
+	"lone-services/pkg/validate"
+	product "lone-services/rpc/product/pb"
+	"lone-services/services/product/internal/dao"
+	"lone-services/services/product/internal/model"
+	"lone-services/services/product/internal/svc"
+	"lone-services/services/product/validator"
+	"strconv"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type NumberLogic struct {
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+	logx.Logger
+}
+
+func NewNumberLogic(ctx context.Context, svcCtx *svc.ServiceContext) *NumberLogic {
+	return &NumberLogic{
+		ctx:    ctx,
+		svcCtx: svcCtx,
+		Logger: logx.WithContext(ctx),
+	}
+}
+
+// Number 服务间增减库存：type=1 增加，type=2 减少
+func (l *NumberLogic) Number(in *product.NumberReq) (*product.Response, error) {
+	var req validator.ProductNumberValidator
+	if msg := validate.ValidateFromProto(in, &req); msg != utils.StringEmpty {
+		return outResponse(utils.ErrorParams, msg), nil
+	}
+
+	return changeProductNumber(l.Logger, req.Id, req.Type, req.Number)
+}
+
+func changeProductNumber(logger logx.Logger, id int64, typ uint32, number uint32) (*product.Response, error) {
+	var info dao.ProductNumberInfo
+	w := modelbase.Params{
+		Eq: map[string]string{"id": strconv.FormatInt(id, 10)},
+	}
+	m := model.ProductModel{}.Init()
+	if err := m.GetOne(w, &info); err != nil {
+		logger.Errorf("product number get: %v", err)
+		return failResponse(utils.Fail), nil
+	}
+	if info.Id < 1 {
+		return failResponse(utils.ErrorNotFund), nil
+	}
+
+	var (
+		rows int64
+		err  error
+	)
+	switch typ {
+	case dao.NumberTypeAdd:
+		rows, err = m.IncrNumber(id, number)
+	case dao.NumberTypeSub:
+		rows, err = m.DecrNumber(id, number)
+	default:
+		return failResponse(utils.ErrorParams), nil
+	}
+	if err != nil {
+		logger.Errorf("product number change: %v", err)
+		return failResponse(utils.Fail), nil
+	}
+	if rows < 1 {
+		if typ == dao.NumberTypeSub {
+			return failResponse(utils.ErrorStockNotEnough), nil
+		}
+		return failResponse(utils.Fail), nil
+	}
+
+	return okResponse(utils.StringEmpty), nil
+}