130 lines
3.3 KiB
Dart
130 lines
3.3 KiB
Dart
// https://github.com/rodrigobastosv/fancy_password_field
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import 'package:flutter/material.dart';
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import 'package:flutter_hbb/common.dart';
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import 'package:get/get.dart';
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import 'package:password_strength/password_strength.dart';
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abstract class ValidationRule {
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String get name;
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bool validate(String value);
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}
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class UppercaseValidationRule extends ValidationRule {
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@override
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String get name => translate('uppercase');
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@override
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bool validate(String value) {
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return value.runes.any((int rune) {
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var character = String.fromCharCode(rune);
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return character.toUpperCase() == character &&
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character.toLowerCase() != character;
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});
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}
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}
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class LowercaseValidationRule extends ValidationRule {
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@override
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String get name => translate('lowercase');
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@override
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bool validate(String value) {
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return value.runes.any((int rune) {
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var character = String.fromCharCode(rune);
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return character.toLowerCase() == character &&
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character.toUpperCase() != character;
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});
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}
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}
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class DigitValidationRule extends ValidationRule {
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@override
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String get name => translate('digit');
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@override
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bool validate(String value) {
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return value.contains(RegExp(r'[0-9]'));
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}
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}
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class SpecialCharacterValidationRule extends ValidationRule {
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@override
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String get name => translate('special character');
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@override
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bool validate(String value) {
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return value.contains(RegExp(r'[!@#$%^&*(),.?":{}|<>]'));
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}
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}
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class MinCharactersValidationRule extends ValidationRule {
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final int _numberOfCharacters;
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MinCharactersValidationRule(this._numberOfCharacters);
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@override
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String get name => translate('length>=$_numberOfCharacters');
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@override
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bool validate(String value) {
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return value.length >= _numberOfCharacters;
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}
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}
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class PasswordStrengthIndicator extends StatelessWidget {
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final RxString password;
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final double weakMedium = 0.33;
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final double mediumStrong = 0.67;
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const PasswordStrengthIndicator({Key? key, required this.password})
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: super(key: key);
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@override
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Widget build(BuildContext context) {
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return Obx(() {
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var strength = estimatePasswordStrength(password.value);
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return Row(
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children: [
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Expanded(
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child: _indicator(
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password.isEmpty ? Colors.grey : _getColor(strength))),
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Expanded(
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child: _indicator(password.isEmpty || strength < weakMedium
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? Colors.grey
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: _getColor(strength))),
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Expanded(
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child: _indicator(password.isEmpty || strength < mediumStrong
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? Colors.grey
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: _getColor(strength))),
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Text(password.isEmpty ? '' : translate(_getLabel(strength)))
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.marginOnly(left: password.isEmpty ? 0 : 8),
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],
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);
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});
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}
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Widget _indicator(Color color) {
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return Container(
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height: 8,
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color: color,
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);
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}
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String _getLabel(double strength) {
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if (strength < weakMedium) {
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return 'Weak';
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} else if (strength < mediumStrong) {
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return 'Medium';
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} else {
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return 'Strong';
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}
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}
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Color _getColor(double strength) {
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if (strength < weakMedium) {
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return Colors.yellow;
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} else if (strength < mediumStrong) {
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return Colors.blue;
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} else {
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return Colors.green;
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}
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}
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}
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