实现category service基础接口

gateway/internal/logic/getsystemcategorieslogic.go

@@ -0,0 +1,97 @@
+package logic
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"godemo/category/category"
+	"godemo/gateway/internal/svc"
+	"godemo/gateway/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type GetSystemCategoriesLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+func NewGetSystemCategoriesLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetSystemCategoriesLogic {
+	return &GetSystemCategoriesLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *GetSystemCategoriesLogic) GetSystemCategories(req *types.GetSystemCategoriesReq) (resp *types.ListCategoriesResp, err error) {
+	// 1. 验证系统ID
+	if strings.TrimSpace(req.SystemID) == "" {
+		return nil, status.Error(codes.InvalidArgument, "system_id is required")
+	}
+
+	// 2. 准备 RPC 请求
+	rpcReq := &category.GetSystemCategoriesRequest{
+		SystemId:           req.SystemID,
+		IncludeDescendants: req.IncludeDescendants,
+	}
+
+	// 添加父分类ID过滤（如果提供）
+	if req.ParentID != "" {
+		rpcReq.ParentId = req.ParentID
+	}
+
+	// 3. 调用 RPC 服务
+	rpcResp, rpcErr := l.svcCtx.CategoryRpc.GetSystemCategories(l.ctx, rpcReq)
+	if rpcErr != nil {
+		st, ok := status.FromError(rpcErr)
+		if ok && st.Code() == codes.NotFound {
+			// 返回空列表而不是错误
+			return &types.ListCategoriesResp{
+				Total: 0,
+				List:  []types.BaseCategory{},
+			}, nil
+		}
+		l.Logger.Errorf("RPC error: %v", rpcErr)
+		return nil, rpcErr
+	}
+
+	// 4. 转换响应数据
+	categories := make([]types.BaseCategory, 0, len(rpcResp.Categories))
+	for _, cat := range rpcResp.Categories {
+		// 转换时间格式
+		createdAt := ""
+		if cat.CreatedAt > 0 {
+			createdAt = time.Unix(cat.CreatedAt, 0).Format(time.RFC3339)
+		}
+
+		updatedAt := ""
+		if cat.UpdatedAt > 0 {
+			updatedAt = time.Unix(cat.UpdatedAt, 0).Format(time.RFC3339)
+		}
+
+		categories = append(categories, types.BaseCategory{
+			ID:          cat.Id,
+			SystemID:    cat.SystemId,
+			Name:        cat.Name,
+			Alias:       cat.Alias,
+			ParentID:    cat.ParentId,
+			Description: cat.Description,
+			CreatedAt:   createdAt,
+			UpdatedAt:   updatedAt,
+		})
+	}
+
+	// 5. 构建响应
+	resp = &types.ListCategoriesResp{
+		Total: rpcResp.Total,
+		List:  categories,
+	}
+
+	l.Logger.Infof("Retrieved %d categories for system %s (parent: %s)", len(categories), req.SystemID, req.ParentID)
+	return resp, nil
+}