feat: implement GenerateCodeUom function for automatic UOM code generation and update UOM creation logic

database/entities/m_uom_entitiy.go

@@ -1,7 +1,11 @@
 package entities
 
 import (
+	"fmt"
+	"strings"
+
 	"github.com/google/uuid"
+	"gorm.io/gorm"
 )
 
 type MUomEntity struct {
@@ -31,3 +35,27 @@ type MUomEntity struct {
 func (MUomEntity) TableName() string {
 	return "m_uoms"
 }
+
+// GenerateCodeUom generates a new UOM code with sequence per client
+func GenerateCodeUom(db *gorm.DB, clientId string) (string, error) {
+	prefix := "UOM"
+
+	var lastUom MUomEntity
+	err := db.
+		Where("client_id = ?", clientId).
+		Where("code LIKE ?", prefix+"-%").
+		Order("code DESC").
+		First(&lastUom).Error
+
+	seq := 1
+	if err == nil && lastUom.Code != "" {
+		parts := strings.Split(lastUom.Code, "-")
+		if len(parts) == 2 {
+			fmt.Sscanf(parts[1], "%d", &seq)
+			seq++
+		}
+	}
+
+	code := fmt.Sprintf("%s-%04d", prefix, seq)
+	return code, nil
+}

modules/uom/dto/uom_dto.go

@@ -29,7 +29,7 @@ type UomCreateRequest struct {
 	Name        string `json:"name" binding:"required"`
 	Description string `json:"description"`
 	Symbol      string `json:"symbol"`
-	Code         string `json:"code"`
+	// Code         string `json:"code"`
 	StdPrecision int    `json:"std_precision"`
 	IsActive     bool   `json:"is_active"`
 	ClientID     string `json:"client_id" binding:"required"`

modules/uom/service/uom_service.go

@@ -39,14 +39,21 @@ func (s *uomService) Create(ctx context.Context, req dtodomain.UomCreateRequest)
 			tx.Rollback()
 		}
 	}()
+	code, err := entities.GenerateCodeUom(s.db, req.ClientID)
+	if err != nil {
+		tx.Rollback()
+		return dtodomain.UomResponse{}, err
+	}
+
 	uom := entities.MUomEntity{
 		Name:         req.Name,
 		Description:  req.Description,
 		Symbol:       req.Symbol,
-		Code:         req.Code,
+		Code:         code,
 		StdPrecision: req.StdPrecision,
 		IsActive:     req.IsActive,
 	}
+
 	clientUUID, err := uuid.Parse(req.ClientID)
 	if err != nil {
 		tx.Rollback()