form_shield library

Classes

AppLocalizationDelegate

AsyncValidationRule<T>

Base interface for asynchronous validation rules.

AsyncValidationState

Manages the state of asynchronous validation with notifiers.

AsyncValidationStateData

AsyncValidator<T>

A validator specifically designed for asynchronous validation operations.

CompositeValidator<T>

A validator that composes multiple validators together.

CreditCardRule

Validates that a string is a valid credit card number using the Luhn algorithm.

CustomRule<T>

A validation rule that uses a custom function to validate values.

DateRangeRule

Validates that a date range between two text fields is valid.

DateRule

Validates that a date string is within specified bounds.

DynamicCustomRule<T>

A validation rule that uses a custom function to validate values and return a dynamic error message.

EmailRule

Validates that a string is a valid email address.

FormInputMaxValueRule

Validates that a numeric value is at most a specified maximum. Works with form inputs.

FormInputMinValueRule

Validates that a numeric value is at least a specified minimum. Works with form inputs.

FormInputValueRule

Validates that a numeric value is at least a specified minimum. Works with form inputs.

FormShieldI18n

FormShieldLocalizations

Helper class to safely access localization strings.

IPAddressRule

Validates that a string is a valid IP address (IPv4 or IPv6).

LengthRule

Validates that a string's length is within specified bounds.

MaxLengthRule

Validates that a string's length is at most a specified maximum.

MaxValueRule

Validates that a numeric value is at most a specified maximum.

MinLengthRule

Validates that a string's length is at least a specified minimum.

MinValueRule

Validates that a numeric value is at least a specified minimum.

PasswordMatchRule

Validates that a string matches another string (e.g., for password confirmation).

PasswordOptions

Configuration options for password validation.

PasswordRule

Validates that a string meets password requirements.

PhoneRule

Validates that a string is a valid phone number.

RequiredRule<T>

Validates that a value is not null or empty.

URLRule

Validates that a string is a valid URL.

ValidationResult

Represents the result of a validation operation.

ValidationRule<T>

Base interface for all validation rules.

Validator<T>

A validator that can be used with Flutter's form validation system.

ValueRule

Validates that a numeric value is within specified bounds.

Functions

asyncValidator<T>(List<ValidationRule<T>> rules, {Duration debounceDuration = const Duration(milliseconds: 300)}) → AsyncValidator<T>

compositeValidator<T>(List<String? Function(T?)> syncValidators, List<AsyncValidator<T>> asyncValidators) → CompositeValidator<T>

Creates a CompositeValidator with the provided list of synchronous validators.

validator<T>(List<ValidationRule<T>> rules) → String? Function(T?)