validation

name	validation
description	Rules for form validation in flutter_starter — always use pre-translated Validator.* methods (validateEmail, validatePassword, validatePhone, validateRequired, validateLength, validateDate, etc.), and add new validation methods inside Validator rather than inlining regex. Use when adding or editing any TextFormField validator, or when validating external arguments from deep links / push payloads.

Form validation

Never roll custom regex in pages. core/utils/validator.dart exposes pre-translated validators.

CustomTextFormField(
  controller: _emailCtl,
  validator: (v) => Validator.validateEmail(context, v),
)

All validate* methods live in Validator. Common ones:

Method	Use for
validateRequired(context, v)	Non-empty check
validateEmail(context, v)	Email format
validatePassword(context, v, minLength: 8, requireUppercase: true, ...)	Password with policy
validatePasswordMatch(context, a, b)	Confirm password
validatePhone(context, v, usFormat: false)	Phone format
validateName(context, v) / validateFullName(context, v)	Personal names
validateNumeric(context, v, min: 0, max: 100, integerOnly: true)	Numeric input
validateLength(context, v, minLength: 3, maxLength: 50)	Text length
validateDate(context, v, minDate: ..., maxDate: ...)	Date format + range
validateUrl(context, v, requireHttps: true)	URL format
validateCreditCard(context, v, cardType: 'visa')	Luhn-checked card number

If none fit, add a new method inside Validator — do not inline a regex at the call site. Regex patterns live in core/utils/validation_patterns.dart.