Add polls (#10111)

* Add polls

Fix #1629

* Add tests

* Fixes

* Change API for creating polls

* Use name instead of content for votes

* Remove poll validation for remote polls

* Add polls to public pages

* When updating the poll, update options just in case they were changed

* Fix public pages showing both poll and other media

app/javascript/mastodon/components/poll.js

@@ -0,0 +1,144 @@
+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 { vote, fetchPoll } from 'mastodon/actions/polls';
+import Motion from 'mastodon/features/ui/util/optional_motion';
+import spring from 'react-motion/lib/spring';
+
+const messages = defineMessages({
+  moments: { id: 'time_remaining.moments', defaultMessage: 'Moments remaining' },
+  seconds: { id: 'time_remaining.seconds', defaultMessage: '{number, plural, one {# second} other {# seconds}} left' },
+  minutes: { id: 'time_remaining.minutes', defaultMessage: '{number, plural, one {# minute} other {# minutes}} left' },
+  hours: { id: 'time_remaining.hours', defaultMessage: '{number, plural, one {# hour} other {# hours}} left' },
+  days: { id: 'time_remaining.days', defaultMessage: '{number, plural, one {# day} other {# days}} left' },
+});
+
+const SECOND = 1000;
+const MINUTE = 1000 * 60;
+const HOUR   = 1000 * 60 * 60;
+const DAY    = 1000 * 60 * 60 * 24;
+
+const timeRemainingString = (intl, date, now) => {
+  const delta = date.getTime() - now;
+
+  let relativeTime;
+
+  if (delta < 10 * SECOND) {
+    relativeTime = intl.formatMessage(messages.moments);
+  } else if (delta < MINUTE) {
+    relativeTime = intl.formatMessage(messages.seconds, { number: Math.floor(delta / SECOND) });
+  } else if (delta < HOUR) {
+    relativeTime = intl.formatMessage(messages.minutes, { number: Math.floor(delta / MINUTE) });
+  } else if (delta < DAY) {
+    relativeTime = intl.formatMessage(messages.hours, { number: Math.floor(delta / HOUR) });
+  } else {
+    relativeTime = intl.formatMessage(messages.days, { number: Math.floor(delta / DAY) });
+  }
+
+  return relativeTime;
+};
+
+export default @injectIntl
+class Poll extends ImmutablePureComponent {
+
+  static propTypes = {
+    poll: ImmutablePropTypes.map.isRequired,
+    intl: PropTypes.object.isRequired,
+    dispatch: PropTypes.func,
+    disabled: PropTypes.bool,
+  };
+
+  state = {
+    selected: {},
+  };
+
+  handleOptionChange = e => {
+    const { target: { value } } = e;
+
+    if (this.props.poll.get('multiple')) {
+      const tmp = { ...this.state.selected };
+      tmp[value] = true;
+      this.setState({ selected: tmp });
+    } else {
+      const tmp = {};
+      tmp[value] = true;
+      this.setState({ selected: tmp });
+    }
+  };
+
+  handleVote = () => {
+    if (this.props.disabled) {
+      return;
+    }
+
+    this.props.dispatch(vote(this.props.poll.get('id'), Object.keys(this.state.selected)));
+  };
+
+  handleRefresh = () => {
+    if (this.props.disabled) {
+      return;
+    }
+
+    this.props.dispatch(fetchPoll(this.props.poll.get('id')));
+  };
+
+  renderOption (option, optionIndex) {
+    const { poll }    = this.props;
+    const percent     = (option.get('votes_count') / poll.get('votes_count')) * 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[`${optionIndex}`];
+    const showResults = poll.get('voted') || poll.get('expired');
+
+    return (
+      <li key={option.get('title')}>
+        {showResults && (
+          <Motion defaultStyle={{ width: 0 }} style={{ width: spring(percent, { stiffness: 180, damping: 12 }) }}>
+            {({ width }) =>
+              <span className={classNames('poll__chart', { leading })} style={{ width: `${width}%` }} />
+            }
+          </Motion>
+        )}
+
+        <label className={classNames('poll__text', { selectable: !showResults })}>
+          <input
+            name='vote-options'
+            type={poll.get('multiple') ? 'checkbox' : 'radio'}
+            value={optionIndex}
+            checked={active}
+            onChange={this.handleOptionChange}
+          />
+
+          {!showResults && <span className={classNames('poll__input', { active })} />}
+          {showResults && <span className='poll__number'>{Math.floor(percent)}%</span>}
+
+          {option.get('title')}
+        </label>
+      </li>
+    );
+  }
+
+  render () {
+    const { poll, intl } = this.props;
+    const timeRemaining  = timeRemainingString(intl, new Date(poll.get('expires_at')), intl.now());
+    const showResults    = poll.get('voted') || poll.get('expired');
+    const disabled       = this.props.disabled || Object.entries(this.state.selected).every(item => !item);
+
+    return (
+      <div className='poll'>
+        <ul>
+          {poll.get('options').map((option, i) => this.renderOption(option, i))}
+        </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>}
+          <FormattedMessage id='poll.total_votes' defaultMessage='{count, plural, one {# vote} other {# votes}}' values={{ count: poll.get('votes_count') }} />  · {timeRemaining}
+        </div>
+      </div>
+    );
+  }
+
+}