Update

internal/transformer/analytics_transformer.go

@@ -175,6 +175,55 @@ func ProductAnalyticsModelToContract(resp *models.ProductAnalyticsResponse) *con
 	}
 }
 
+// ProductAnalyticsPerCategoryContractToModel converts contract request to model
+func ProductAnalyticsPerCategoryContractToModel(req *contract.ProductAnalyticsPerCategoryRequest) *models.ProductAnalyticsPerCategoryRequest {
+	var dateFrom, dateTo time.Time
+
+	// Parse date range using utility function
+	if fromTime, toTime, err := util.ParseDateRangeToJakartaTime(req.DateFrom, req.DateTo); err == nil {
+		if fromTime != nil {
+			dateFrom = *fromTime
+		}
+		if toTime != nil {
+			dateTo = *toTime
+		}
+	}
+
+	return &models.ProductAnalyticsPerCategoryRequest{
+		OrganizationID: req.OrganizationID,
+		OutletID:       req.OutletID,
+		DateFrom:       dateFrom,
+		DateTo:         dateTo,
+	}
+}
+
+// ProductAnalyticsPerCategoryModelToContract converts model response to contract
+func ProductAnalyticsPerCategoryModelToContract(resp *models.ProductAnalyticsPerCategoryResponse) *contract.ProductAnalyticsPerCategoryResponse {
+	if resp == nil {
+		return nil
+	}
+
+	var data []contract.ProductAnalyticsPerCategoryData
+	for _, item := range resp.Data {
+		data = append(data, contract.ProductAnalyticsPerCategoryData{
+			CategoryID:   item.CategoryID,
+			CategoryName: item.CategoryName,
+			TotalRevenue: item.TotalRevenue,
+			TotalQuantity: item.TotalQuantity,
+			ProductCount: item.ProductCount,
+			OrderCount:   item.OrderCount,
+		})
+	}
+
+	return &contract.ProductAnalyticsPerCategoryResponse{
+		OrganizationID: resp.OrganizationID,
+		OutletID:       resp.OutletID,
+		DateFrom:       resp.DateFrom,
+		DateTo:         resp.DateTo,
+		Data:           data,
+	}
+}
+
 // DashboardAnalyticsContractToModel converts contract request to model
 func DashboardAnalyticsContractToModel(req *contract.DashboardAnalyticsRequest) *models.DashboardAnalyticsRequest {
 	var dateFrom, dateTo time.Time