[FEAT/BE] change current stock with pending in product warehouse

internal/modules/inventory/product-stocks/services/product-stock.service.go

@@ -175,5 +175,47 @@ func (s productStockService) GetOne(c *fiber.Ctx, id uint) (*entity.Product, err
 		s.Log.Errorf("Failed get product by id: %+v", err)
 		return nil, err
 	}
+
+	if len(product.ProductWarehouses) > 0 {
+		ids := make([]uint, 0, len(product.ProductWarehouses))
+		for _, pw := range product.ProductWarehouses {
+			if pw.Id != 0 {
+				ids = append(ids, pw.Id)
+			}
+		}
+
+		if len(ids) > 0 {
+			type pendingUsageRow struct {
+				ProductWarehouseId uint
+				PendingQty         float64
+			}
+
+			var rows []pendingUsageRow
+			if err := s.ProductRepository.DB().WithContext(c.Context()).
+				Table("recording_stocks").
+				Select("product_warehouse_id, COALESCE(SUM(pending_qty), 0) AS pending_qty").
+				Where("pending_qty > 0").
+				Where("product_warehouse_id IN ?", ids).
+				Group("product_warehouse_id").
+				Scan(&rows).Error; err != nil {
+				s.Log.Errorf("Failed to load pending usage for product warehouses: %+v", err)
+				return nil, err
+			}
+
+			if len(rows) > 0 {
+				pendingMap := make(map[uint]float64, len(rows))
+				for _, row := range rows {
+					pendingMap[row.ProductWarehouseId] = row.PendingQty
+				}
+
+				for i := range product.ProductWarehouses {
+					pw := &product.ProductWarehouses[i]
+					if pending, ok := pendingMap[pw.Id]; ok && pending != 0 {
+						pw.Quantity -= pending
+					}
+				}
+			}
+		}
+	}
 	return product, nil
 }