Add coa purchase and vendors

internal/validator/vendor_validator.go

@@ -0,0 +1,118 @@
+package validator
+
+import (
+	"errors"
+	"strings"
+
+	"apskel-pos-be/internal/constants"
+	"apskel-pos-be/internal/contract"
+)
+
+type VendorValidator interface {
+	ValidateCreateVendorRequest(req *contract.CreateVendorRequest) (error, string)
+	ValidateUpdateVendorRequest(req *contract.UpdateVendorRequest) (error, string)
+	ValidateListVendorsRequest(req *contract.ListVendorsRequest) (error, string)
+}
+
+type VendorValidatorImpl struct{}
+
+func NewVendorValidator() *VendorValidatorImpl {
+	return &VendorValidatorImpl{}
+}
+
+func (v *VendorValidatorImpl) ValidateCreateVendorRequest(req *contract.CreateVendorRequest) (error, string) {
+	if req == nil {
+		return errors.New("request body 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
+	}
+
+	if req.Email != nil && strings.TrimSpace(*req.Email) != "" {
+		if !isValidEmail(*req.Email) {
+			return errors.New("email format is invalid"), constants.MalformedFieldErrorCode
+		}
+	}
+
+	if req.PhoneNumber != nil && strings.TrimSpace(*req.PhoneNumber) != "" {
+		if !isValidPhone(*req.PhoneNumber) {
+			return errors.New("phone_number format is invalid"), constants.MalformedFieldErrorCode
+		}
+	}
+
+	if req.ContactPerson != nil && len(*req.ContactPerson) > 255 {
+		return errors.New("contact_person must be at most 255 characters"), constants.MalformedFieldErrorCode
+	}
+
+	if req.TaxNumber != nil && len(*req.TaxNumber) > 50 {
+		return errors.New("tax_number must be at most 50 characters"), constants.MalformedFieldErrorCode
+	}
+
+	if req.PaymentTerms != nil && len(*req.PaymentTerms) > 100 {
+		return errors.New("payment_terms must be at most 100 characters"), constants.MalformedFieldErrorCode
+	}
+
+	return nil, ""
+}
+
+func (v *VendorValidatorImpl) ValidateUpdateVendorRequest(req *contract.UpdateVendorRequest) (error, string) {
+	if req == nil {
+		return errors.New("request body is required"), 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
+		}
+	}
+
+	if req.Email != nil && strings.TrimSpace(*req.Email) != "" {
+		if !isValidEmail(*req.Email) {
+			return errors.New("email format is invalid"), constants.MalformedFieldErrorCode
+		}
+	}
+
+	if req.PhoneNumber != nil && strings.TrimSpace(*req.PhoneNumber) != "" {
+		if !isValidPhone(*req.PhoneNumber) {
+			return errors.New("phone_number format is invalid"), constants.MalformedFieldErrorCode
+		}
+	}
+
+	if req.ContactPerson != nil && len(*req.ContactPerson) > 255 {
+		return errors.New("contact_person must be at most 255 characters"), constants.MalformedFieldErrorCode
+	}
+
+	if req.TaxNumber != nil && len(*req.TaxNumber) > 50 {
+		return errors.New("tax_number must be at most 50 characters"), constants.MalformedFieldErrorCode
+	}
+
+	if req.PaymentTerms != nil && len(*req.PaymentTerms) > 100 {
+		return errors.New("payment_terms must be at most 100 characters"), constants.MalformedFieldErrorCode
+	}
+
+	return nil, ""
+}
+
+func (v *VendorValidatorImpl) ValidateListVendorsRequest(req *contract.ListVendorsRequest) (error, string) {
+	if req == nil {
+		return errors.New("request body is required"), constants.MissingFieldErrorCode
+	}
+
+	if req.Page < 1 {
+		return errors.New("page must be at least 1"), constants.MalformedFieldErrorCode
+	}
+
+	if req.Limit < 1 || req.Limit > 100 {
+		return errors.New("limit must be between 1 and 100"), constants.MalformedFieldErrorCode
+	}
+
+	return nil, ""
+}