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import React from 'react';
import PropTypes from 'prop-types';
import ImmutablePropTypes from 'react-immutable-proptypes';
import ImmutablePureComponent from 'react-immutable-pure-component';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import classNames from 'classnames';
import Motion from 'flavours/glitch/util/optional_motion';
import spring from 'react-motion/lib/spring';
import escapeTextContentForBrowser from 'escape-html';
import emojify from 'flavours/glitch/util/emoji';
import RelativeTimestamp from './relative_timestamp';
import Icon from 'flavours/glitch/components/icon';
const messages = defineMessages({
closed: { id: 'poll.closed', defaultMessage: 'Closed' },
voted: { id: 'poll.voted', defaultMessage: 'You voted for this answer', description: 'Tooltip of the "voted" checkmark in polls' },
});
const makeEmojiMap = record => record.get('emojis').reduce((obj, emoji) => {
obj[`:${emoji.get('shortcode')}:`] = emoji.toJS();
return obj;
}, {});
export default @injectIntl
class Poll extends ImmutablePureComponent {
static propTypes = {
poll: ImmutablePropTypes.map,
intl: PropTypes.object.isRequired,
disabled: PropTypes.bool,
refresh: PropTypes.func,
onVote: PropTypes.func,
};
state = {
selected: {},
expired: null,
};
static getDerivedStateFromProps (props, state) {
const { poll, intl } = props;
const expires_at = poll.get('expires_at');
const expired = poll.get('expired') || expires_at !== null && (new Date(expires_at)).getTime() < intl.now();
return (expired === state.expired) ? null : { expired };
}
componentDidMount () {
this._setupTimer();
}
componentDidUpdate () {
this._setupTimer();
}
componentWillUnmount () {
clearTimeout(this._timer);
}
_setupTimer () {
const { poll, intl } = this.props;
clearTimeout(this._timer);
if (!this.state.expired) {
const delay = (new Date(poll.get('expires_at'))).getTime() - intl.now();
this._timer = setTimeout(() => {
this.setState({ expired: true });
}, delay);
}
}
_toggleOption = value => {
if (this.props.poll.get('multiple')) {
const tmp = { ...this.state.selected };
if (tmp[value]) {
delete tmp[value];
} else {
tmp[value] = true;
}
this.setState({ selected: tmp });
} else {
const tmp = {};
tmp[value] = true;
this.setState({ selected: tmp });
}
}
handleOptionChange = ({ target: { value } }) => {
this._toggleOption(value);
};
handleOptionKeyPress = (e) => {
if (e.key === 'Enter' || e.key === ' ') {
this._toggleOption(e.target.getAttribute('data-index'));
e.stopPropagation();
e.preventDefault();
}
}
handleVote = () => {
if (this.props.disabled) {
return;
}
this.props.onVote(Object.keys(this.state.selected));
};
handleRefresh = () => {
if (this.props.disabled) {
return;
}
this.props.refresh();
};
renderOption (option, optionIndex, showResults) {
const { poll, disabled, intl } = this.props;
const pollVotesCount = poll.get('voters_count') || poll.get('votes_count');
const percent = pollVotesCount === 0 ? 0 : (option.get('votes_count') / pollVotesCount) * 100;
const leading = poll.get('options').filterNot(other => other.get('title') === option.get('title')).every(other => option.get('votes_count') >= other.get('votes_count'));
const active = !!this.state.selected[`${optionIndex}`];
const voted = option.get('voted') || (poll.get('own_votes') && poll.get('own_votes').includes(optionIndex));
let titleEmojified = option.get('title_emojified');
if (!titleEmojified) {
const emojiMap = makeEmojiMap(poll);
titleEmojified = emojify(escapeTextContentForBrowser(option.get('title')), emojiMap);
}
return (
<li key={option.get('title')}>
<label className={classNames('poll__option', { selectable: !showResults })}>
<input
name='vote-options'
type={poll.get('multiple') ? 'checkbox' : 'radio'}
value={optionIndex}
checked={active}
onChange={this.handleOptionChange}
disabled={disabled}
/>
{!showResults && (
<span
className={classNames('poll__input', { checkbox: poll.get('multiple'), active })}
tabIndex='0'
role={poll.get('multiple') ? 'checkbox' : 'radio'}
onKeyPress={this.handleOptionKeyPress}
aria-checked={active}
aria-label={option.get('title')}
data-index={optionIndex}
/>
)}
{showResults && <span className='poll__number'>
{Math.round(percent)}%
</span>}
<span
className='poll__option__text'
dangerouslySetInnerHTML={{ __html: titleEmojified }}
/>
{!!voted && <span className='poll__voted'>
<Icon id='check' className='poll__voted__mark' title={intl.formatMessage(messages.voted)} />
</span>}
</label>
{showResults && (
<Motion defaultStyle={{ width: 0 }} style={{ width: spring(percent, { stiffness: 180, damping: 12 }) }}>
{({ width }) =>
<span className={classNames('poll__chart', { leading })} style={{ width: `${width}%` }} />
}
</Motion>
)}
</li>
);
}
render () {
const { poll, intl } = this.props;
const { expired } = this.state;
if (!poll) {
return null;
}
const timeRemaining = expired ? intl.formatMessage(messages.closed) : <RelativeTimestamp timestamp={poll.get('expires_at')} futureDate />;
const showResults = poll.get('voted') || expired;
const disabled = this.props.disabled || Object.entries(this.state.selected).every(item => !item);
let votesCount = null;
if (poll.get('voters_count') !== null && poll.get('voters_count') !== undefined) {
votesCount = <FormattedMessage id='poll.total_people' defaultMessage='{count, plural, one {# person} other {# people}}' values={{ count: poll.get('voters_count') }} />;
} else {
votesCount = <FormattedMessage id='poll.total_votes' defaultMessage='{count, plural, one {# vote} other {# votes}}' values={{ count: poll.get('votes_count') }} />;
}
return (
<div className='poll'>
<ul>
{poll.get('options').map((option, i) => this.renderOption(option, i, showResults))}
</ul>
<div className='poll__footer'>
{!showResults && <button className='button button-secondary' disabled={disabled} onClick={this.handleVote}><FormattedMessage id='poll.vote' defaultMessage='Vote' /></button>}
{showResults && !this.props.disabled && <span><button className='poll__link' onClick={this.handleRefresh}><FormattedMessage id='poll.refresh' defaultMessage='Refresh' /></button> · </span>}
{votesCount}
{poll.get('expires_at') && <span> · {timeRemaining}</span>}
</div>
</div>
);
}
}
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