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check.go
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check.go
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package validation
import (
"fmt"
"net/mail"
"regexp"
"slices"
"strings"
"github.com/ministryofjustice/opg-modernising-lpa/internal/date"
"github.com/ministryofjustice/opg-modernising-lpa/internal/place"
)
var (
mobileRegex = regexp.MustCompile(`^(?:07|\+?447)\d{9}$`)
nonUKMobileRegex = regexp.MustCompile(`^\+\d{4,15}$`)
postcodeRegex = regexp.MustCompile("^[A-Z0-9 ]{1,9}$")
)
type ErrorChecker interface {
CheckError(label string, value error) FormattableError
}
func (l *List) Error(name, label string, value error, checks ...ErrorChecker) {
for _, check := range checks {
if err := check.CheckError(label, value); err != nil {
l.Add(name, err)
return
}
}
}
type StringChecker interface {
CheckString(label, value string) FormattableError
}
func (l *List) String(name, label, value string, checks ...StringChecker) {
for _, check := range checks {
if err := check.CheckString(label, value); err != nil {
l.Add(name, err)
return
}
}
}
type DateChecker interface {
CheckDate(string, date.Date) FormattableError
}
func (l *List) Date(name, label string, value date.Date, checks ...DateChecker) {
for _, check := range checks {
if err := check.CheckDate(label, value); err != nil {
l.Add(name, err)
return
}
}
}
type AddressChecker interface {
CheckAddress(string, *place.Address) FormattableError
}
func (l *List) Address(name, label string, value *place.Address, checks ...AddressChecker) {
for _, check := range checks {
if err := check.CheckAddress(label, value); err != nil {
l.Add(name, err)
return
}
}
}
type BoolChecker interface {
CheckBool(string, bool) FormattableError
}
func (l *List) Bool(name, label string, value bool, checks ...BoolChecker) {
for _, check := range checks {
if err := check.CheckBool(label, value); err != nil {
l.Add(name, err)
return
}
}
}
type OptionsChecker interface {
CheckOptions(string, []string) FormattableError
}
func (l *List) Options(name, label string, value []string, checks ...OptionsChecker) {
for _, check := range checks {
if err := check.CheckOptions(label, value); err != nil {
l.Add(name, err)
return
}
}
}
type SelectedCheck struct {
useCustomError bool
}
func (c SelectedCheck) CustomError() SelectedCheck {
c.useCustomError = true
return c
}
func (c SelectedCheck) CheckBool(label string, value bool) FormattableError {
if !value {
if c.useCustomError {
return CustomError{Label: label}
} else {
return SelectError{Label: label}
}
}
return nil
}
func (c SelectedCheck) CheckOptions(label string, value []string) FormattableError {
if len(value) == 0 {
if c.useCustomError {
return CustomError{Label: label}
} else {
return SelectError{Label: label}
}
}
return nil
}
func (c SelectedCheck) CheckAddress(label string, value *place.Address) FormattableError {
if value == nil {
if c.useCustomError {
return CustomError{Label: label}
} else {
return SelectError{Label: label}
}
}
return nil
}
func (c SelectedCheck) CheckError(label string, err error) FormattableError {
if err != nil {
return SelectError{Label: label}
}
return nil
}
func Selected() SelectedCheck {
return SelectedCheck{}
}
type SelectCheck struct {
in []string
useCustomError bool
}
func (c SelectCheck) CustomError() SelectCheck {
c.useCustomError = true
return c
}
func (c SelectCheck) CheckString(label string, value string) FormattableError {
if !slices.Contains(c.in, value) {
if c.useCustomError {
return CustomError{Label: label}
} else {
return SelectError{Label: label}
}
}
return nil
}
func (c SelectCheck) CheckOptions(label string, value []string) FormattableError {
for _, v := range value {
if !slices.Contains(c.in, v) {
if c.useCustomError {
return CustomError{Label: label}
} else {
return SelectError{Label: label}
}
}
}
return nil
}
func Select(in ...string) SelectCheck {
return SelectCheck{in: in}
}
type EmptyCheck struct{}
func (c EmptyCheck) CheckString(label, value string) FormattableError {
if value == "" {
return EnterError{Label: label}
}
return nil
}
func Empty() EmptyCheck {
return EmptyCheck{}
}
type StringTooLongCheck struct {
length int
}
func (c StringTooLongCheck) CheckString(label, value string) FormattableError {
if len(value) > c.length {
return StringTooLongError{Label: label, Length: c.length}
}
return nil
}
func StringTooLong(length int) StringTooLongCheck {
return StringTooLongCheck{length: length}
}
type StringLengthCheck struct {
length int
}
func (c StringLengthCheck) CheckString(label, value string) FormattableError {
if len(value) != c.length {
return StringLengthError{Label: label, Length: c.length}
}
return nil
}
func StringLength(length int) StringLengthCheck {
return StringLengthCheck{length: length}
}
type MobileCheck struct {
nonUK bool
errorLabel string
}
func (c MobileCheck) ErrorLabel(label string) MobileCheck {
c.errorLabel = label
return c
}
func (c MobileCheck) CheckString(label, value string) FormattableError {
re := mobileRegex
if c.nonUK {
re = nonUKMobileRegex
}
if value != "" && !re.MatchString(strings.ReplaceAll(value, " ", "")) {
if c.errorLabel != "" {
return CustomError{Label: c.errorLabel}
} else {
return MobileError{Label: label}
}
}
return nil
}
func Mobile() MobileCheck {
return MobileCheck{}
}
func NonUKMobile() MobileCheck {
return MobileCheck{nonUK: true}
}
type PostcodeCheck struct{}
func (c PostcodeCheck) CheckString(label, value string) FormattableError {
if value != "" && !postcodeRegex.MatchString(value) {
return PostcodeError{Label: label}
}
return nil
}
func Postcode() PostcodeCheck {
return PostcodeCheck{}
}
type EmailCheck struct{}
func (c EmailCheck) CheckString(label, value string) FormattableError {
if value != "" {
if _, err := mail.ParseAddress(fmt.Sprintf("<%s>", value)); err != nil {
return EmailError{Label: label}
}
}
return nil
}
func Email() EmailCheck {
return EmailCheck{}
}
type DateMissingCheck struct{}
func (c DateMissingCheck) CheckDate(label string, date date.Date) FormattableError {
e := DateMissingError{Label: label}
if date.DayString() == "" {
e.MissingDay = true
}
if date.MonthString() == "" {
e.MissingMonth = true
}
if date.YearString() == "" {
e.MissingYear = true
}
if e.MissingDay || e.MissingMonth || e.MissingYear {
if e.MissingDay && e.MissingMonth && e.MissingYear {
return EnterError{Label: label}
}
return e
}
return nil
}
func DateMissing() DateMissingCheck {
return DateMissingCheck{}
}
type DateMustBeRealCheck struct{}
func (c DateMustBeRealCheck) CheckDate(label string, value date.Date) FormattableError {
if !value.Valid() {
return DateMustBeRealError{Label: label}
}
return nil
}
func DateMustBeReal() DateMustBeRealCheck {
return DateMustBeRealCheck{}
}
type DateMustBePastCheck struct{}
func (c DateMustBePastCheck) CheckDate(label string, value date.Date) FormattableError {
if value.After(date.Today()) {
return DateMustBePastError{Label: label}
}
return nil
}
func DateMustBePast() DateMustBePastCheck {
return DateMustBePastCheck{}
}
type ReferenceNumberCheck struct{}
func (c ReferenceNumberCheck) CheckString(label, value string) FormattableError {
if value[0] != 'M' && value[0] != '7' {
return ReferenceNumberError{Label: label}
}
return nil
}
func ReferenceNumber() ReferenceNumberCheck {
return ReferenceNumberCheck{}
}