openethereum/js/packages/ui/Form/PasswordStrength/passwordStrength.js

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { debounce } from 'lodash';
import { FormattedMessage } from 'react-intl';
import zxcvbn from 'zxcvbn';
import LabelWrapper from '../LabelWrapper';
import Progress from '../../Progress';
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import styles from './passwordStrength.css';
export default class PasswordStrength extends Component {
static propTypes = {
input: PropTypes.string.isRequired
};
state = {
strength: null
};
constructor (props) {
super(props);
this.updateStrength = debounce(this._updateStrength, 50, { leading: true });
}
componentWillMount () {
this.updateStrength(this.props.input);
}
componentWillReceiveProps (nextProps) {
if (nextProps.input !== this.props.input) {
this.updateStrength(nextProps.input);
}
}
_updateStrength (input = '') {
const strength = zxcvbn(input);
this.setState({ strength });
}
render () {
const { strength } = this.state;
if (!strength) {
return null;
}
const { score, feedback } = strength;
return (
<LabelWrapper
className={ styles.strength }
label={
<FormattedMessage
id='ui.passwordStrength.label'
defaultMessage='password strength'
/>
}
>
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<Progress
color={ this.getStrengthBarColor(score) }
isDeterminate
max={ 100 }
value={ score * 100 / 5 + 20 }
/>
<div className={ styles.feedback }>
{ this.renderFeedback(feedback) }
</div>
</LabelWrapper>
);
}
// Note that the suggestions are in english, thus it wouldn't
// make sense to add translations to surrounding words
renderFeedback (feedback = {}) {
const { suggestions = [] } = feedback;
return (
<div>
<p>
{ suggestions.join(' ') }
</p>
</div>
);
}
getStrengthBarColor (score) {
switch (score) {
case 4:
return 'green';
case 3:
return 'blue';
case 2:
return 'yellow';
case 1:
return 'orange';
default:
return 'red';
}
}
}