init

internal/validator/product_variant_validator.go

@@ -0,0 +1,64 @@
+package validator
+
+import (
+	"errors"
+	"strings"
+
+	"apskel-pos-be/internal/constants"
+	"apskel-pos-be/internal/contract"
+
+	"github.com/google/uuid"
+)
+
+type ProductVariantValidator interface {
+	ValidateCreateProductVariantRequest(req *contract.CreateProductVariantRequest) (error, string)
+	ValidateUpdateProductVariantRequest(req *contract.UpdateProductVariantRequest) (error, string)
+}
+
+type ProductVariantValidatorImpl struct{}
+
+func NewProductVariantValidator() *ProductVariantValidatorImpl {
+	return &ProductVariantValidatorImpl{}
+}
+
+func (v *ProductVariantValidatorImpl) ValidateCreateProductVariantRequest(req *contract.CreateProductVariantRequest) (error, string) {
+	if req == nil {
+		return errors.New("request body is required"), constants.MissingFieldErrorCode
+	}
+
+	if req.ProductID == uuid.Nil {
+		return errors.New("product_id is required"), constants.MissingFieldErrorCode
+	}
+
+	if strings.TrimSpace(req.Name) == "" {
+		return errors.New("name is required"), constants.MissingFieldErrorCode
+	}
+
+	if len(req.Name) < 1 || len(req.Name) > 255 {
+		return errors.New("name must be between 1 and 255 characters"), constants.MalformedFieldErrorCode
+	}
+
+	return nil, ""
+}
+
+func (v *ProductVariantValidatorImpl) ValidateUpdateProductVariantRequest(req *contract.UpdateProductVariantRequest) (error, string) {
+	if req == nil {
+		return errors.New("request body is required"), constants.MissingFieldErrorCode
+	}
+
+	// At least one field should be provided for update
+	if req.Name == nil && req.PriceModifier == nil && req.Metadata == nil {
+		return errors.New("at least one field must be provided for update"), constants.MissingFieldErrorCode
+	}
+
+	if req.Name != nil {
+		if strings.TrimSpace(*req.Name) == "" {
+			return errors.New("name cannot be empty"), constants.MalformedFieldErrorCode
+		}
+		if len(*req.Name) < 1 || len(*req.Name) > 255 {
+			return errors.New("name must be between 1 and 255 characters"), constants.MalformedFieldErrorCode
+		}
+	}
+
+	return nil, ""
+}