[FIX/BE-US] purchase edit qty approval staf add adjustment fifo system

internal/common/service/common.fifo.service.go

@@ -25,6 +25,7 @@ type FifoService interface {
 	Replenish(ctx context.Context, req StockReplenishRequest) (*StockReplenishResult, error)
 	Consume(ctx context.Context, req StockConsumeRequest) (*StockConsumeResult, error)
 	ReleaseUsage(ctx context.Context, req StockReleaseRequest) error
+	AdjustStockableQuantity(ctx context.Context, req StockAdjustRequest) error
 }
 
 type fifoService struct {
@@ -95,6 +96,15 @@ type StockReplenishRequest struct {
 	Tx                 *gorm.DB
 }
 
+type StockAdjustRequest struct {
+	StockableKey       fifo.StockableKey
+	StockableID        uint
+	ProductWarehouseID uint
+	Quantity           float64
+	Note               *string
+	Tx                 *gorm.DB
+}
+
 type PendingResolution struct {
 	UsableKey fifo.UsableKey
 	UsableID  uint
@@ -137,6 +147,37 @@ type StockReleaseRequest struct {
 	Reason    *string
 	Tx        *gorm.DB
 }
+func (s *fifoService) AdjustStockableQuantity(ctx context.Context, req StockAdjustRequest) error {
+	if req.StockableID == 0 || strings.TrimSpace(req.StockableKey.String()) == "" {
+		return errors.New("stockable key and id are required")
+	}
+	if req.ProductWarehouseID == 0 {
+		return errors.New("product warehouse id is required")
+	}
+	if req.Quantity == 0 {
+		return nil
+	}
+	if req.Quantity > 0 {
+		return errors.New("quantity must be negative")
+	}
+
+	cfg, ok := fifo.Stockable(req.StockableKey)
+	if !ok {
+		return fmt.Errorf("stockable %q is not registered", req.StockableKey)
+	}
+
+	return s.withTransaction(ctx, req.Tx, func(tx *gorm.DB) error {
+		if err := s.incrementStockableQty(ctx, tx, cfg, req.StockableID, req.Quantity); err != nil {
+			return err
+		}
+
+		return s.productWarehouseRepo.AdjustQuantities(ctx, map[uint]float64{
+			req.ProductWarehouseID: req.Quantity,
+		}, func(db *gorm.DB) *gorm.DB {
+			return s.txOrDB(tx, db)
+		})
+	})
+}
 
 func (s *fifoService) Replenish(ctx context.Context, req StockReplenishRequest) (*StockReplenishResult, error) {
 	if req.StockableID == 0 || strings.TrimSpace(req.StockableKey.String()) == "" {