content: import React from 'react';
  import Column from '../ui/components/column';
  import ColumnLink from '../ui/components/column_link';
  import ColumnSubheading from '../ui/components/column_subheading';
  import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
  import { connect } from 'react-redux';
  import PropTypes from 'prop-types';
  import ImmutablePropTypes from 'react-immutable-proptypes';
  import ImmutablePureComponent from 'react-immutable-pure-component';
  import { me, profile_directory, showTrends } from '../../initial_state';
  import { fetchFollowRequests } from 'mastodon/actions/accounts';
  import { List as ImmutableList } from 'immutable';
  import NavigationBar from '../compose/components/navigation_bar';
  import Icon from 'mastodon/components/icon';
  import LinkFooter from 'mastodon/features/ui/components/link_footer';
  import TrendsContainer from './containers/trends_container';
  
  const messages = defineMessages({
    home_timeline: { id: 'tabs_bar.home', defaultMessage: 'Home' },
    notifications: { id: 'tabs_bar.notifications', defaultMessage: 'Notifications' },
    public_timeline: { id: 'navigation_bar.public_timeline', defaultMessage: 'Federated timeline' },
    settings_subheading: { id: 'column_subheading.settings', defaultMessage: 'Settings' },
    community_timeline: { id: 'navigation_bar.community_timeline', defaultMessage: 'Local timeline' },
    direct: { id: 'navigation_bar.direct', defaultMessage: 'Direct messages' },
    bookmarks: { id: 'navigation_bar.bookmarks', defaultMessage: 'Bookmarks' },
    preferences: { id: 'navigation_bar.preferences', defaultMessage: 'Preferences' },
    follow_requests: { id: 'navigation_bar.follow_requests', defaultMessage: 'Follow requests' },
    favourites: { id: 'navigation_bar.favourites', defaultMessage: 'Favourites' },
    blocks: { id: 'navigation_bar.blocks', defaultMessage: 'Blocked users' },
    domain_blocks: { id: 'navigation_bar.domain_blocks', defaultMessage: 'Hidden domains' },
    mutes: { id: 'navigation_bar.mutes', defaultMessage: 'Muted users' },
    pins: { id: 'navigation_bar.pins', defaultMessage: 'Pinned toots' },
    lists: { id: 'navigation_bar.lists', defaultMessage: 'Lists' },
    discover: { id: 'navigation_bar.discover', defaultMessage: 'Discover' },
    personal: { id: 'navigation_bar.personal', defaultMessage: 'Personal' },
    security: { id: 'navigation_bar.security', defaultMessage: 'Security' },
    menu: { id: 'getting_started.heading', defaultMessage: 'Getting started' },
    profile_directory: { id: 'getting_started.directory', defaultMessage: 'Profile directory' },
  });
  
  const mapStateToProps = state => ({
    myAccount: state.getIn(['accounts', me]),
    unreadFollowRequests: state.getIn(['user_lists', 'follow_requests', 'items'], ImmutableList()).size,
  });
  
  const mapDispatchToProps = dispatch => ({
    fetchFollowRequests: () => dispatch(fetchFollowRequests()),
  });
  
  const badgeDisplay = (number, limit) => {
    if (number === 0) {
      return undefined;
    } else if (limit && number >= limit) {
      return `${limit}+`;
    } else {
      return number;
    }
  };
  
  const NAVIGATION_PANEL_BREAKPOINT = 600 + (285 * 2) + (10 * 2);
  
  export default @connect(mapStateToProps, mapDispatchToProps)
  @injectIntl
  class GettingStarted extends ImmutablePureComponent {
  
    static contextTypes = {
      router: PropTypes.object.isRequired,
    };
  
    static propTypes = {
      intl: PropTypes.object.isRequired,
      myAccount: ImmutablePropTypes.map.isRequired,
      columns: ImmutablePropTypes.list,
      multiColumn: PropTypes.bool,
      fetchFollowRequests: PropTypes.func.isRequired,
      unreadFollowRequests: PropTypes.number,
      unreadNotifications: PropTypes.number,
    };
  
    componentDidMount () {
      const { fetchFollowRequests, multiColumn } = this.props;
  
      if (!multiColumn && window.innerWidth >= NAVIGATION_PANEL_BREAKPOINT) {
        this.context.router.history.replace('/timelines/home');
        return;
      }
  
      fetchFollowRequests();
    }
  
    render () {
      const { intl, myAccount, multiColumn, unreadFollowRequests } = this.props;
  
      const navItems = [];
      let i = 1;
      let height = (multiColumn) ? 0 : 60;
  
      if (multiColumn) {
        navItems.push(
          <ColumnSubheading key={i++} text={intl.formatMessage(messages.discover)} />,
          <ColumnLink key={i++} icon='globe' text={intl.formatMessage(messages.public_timeline)} to='/timelines/public' />,
        );
  
        height += 34 + 48;
  
        if (profile_directory) {
          navItems.push(
            <ColumnLink key={i++} icon='address-book' text={intl.formatMessage(messages.profile_directory)} to='/directory' />,
          );
  
          height += 48;
        }
  
        navItems.push(
          <ColumnSubheading key={i++} text={intl.formatMessage(messages.personal)} />,
        );
  
        height += 34;
      } else if (profile_directory) {
        navItems.push(
          <ColumnLink key={i++} icon='address-book' text={intl.formatMessage(messages.profile_directory)} to='/directory' />,
        );
  
        height += 48;
      }
  
      navItems.push(
        <ColumnLink key={i++} icon='envelope' text={intl.formatMessage(messages.direct)} to='/timelines/direct' />,
        <ColumnLink key={i++} icon='bookmark' text={intl.formatMessage(messages.bookmarks)} to='/bookmarks' />,
        <ColumnLink key={i++} icon='star' text={intl.formatMessage(messages.favourites)} to='/favourites' />,
        <ColumnLink key={i++} icon='list-ul' text={intl.formatMessage(messages.lists)} to='/lists' />,
      );
  
      height += 48*4;
  
      if (myAccount.get('locked') || unreadFollowRequests > 0) {
        navItems.push(<ColumnLink key={i++} icon='user-plus' text={intl.formatMessage(messages.follow_requests)} badge={badgeDisplay(unreadFollowRequests, 40)} to='/follow_requests' />);
        height += 48;
      }
  
      if (!multiColumn) {
        navItems.push(
          <ColumnSubheading key={i++} text={intl.formatMessage(messages.settings_subheading)} />,
          <ColumnLink key={i++} icon='gears' text={intl.formatMessage(messages.preferences)} href='/settings/preferences' />,
        );
  
        height += 34 + 48;
      }
  
      return (
        <Column bindToDocument={!multiColumn} label={intl.formatMessage(messages.menu)}>
          {multiColumn && <div className='column-header__wrapper'>
            <h1 className='column-header'>
              <button>
                <Icon id='bars' className='column-header__icon' fixedWidth />
                <FormattedMessage id='getting_started.heading' defaultMessage='Getting started' />
              </button>
            </h1>
          </div>}
  
          <div className='getting-started'>
            <div className='getting-started__wrapper' style={{ height }}>
              {!multiColumn && <NavigationBar account={myAccount} />}
              {navItems}
            </div>
  
            {!multiColumn && <div className='flex-spacer' />}
  
            <LinkFooter withHotkeys={multiColumn} />
          </div>
  
          {multiColumn && showTrends && <TrendsContainer />}
        </Column>
      );
    }
  
  }
  