apskel-pos-backend/internal/validator/product_variant_validator.go

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2025-07-18 20:10:29 +07:00
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, ""
}