Add trends UI with admin and user settings (#11502)

app/javascript/mastodon/features/getting_started/components/trends.js

@@ -0,0 +1,43 @@
+import React from 'react';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import PropTypes from 'prop-types';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import Hashtag from 'mastodon/components/hashtag';
+
+export default class Trends extends ImmutablePureComponent {
+
+  static defaultProps = {
+    loading: false,
+  };
+
+  static propTypes = {
+    trends: ImmutablePropTypes.list,
+    fetchTrends: PropTypes.func.isRequired,
+  };
+
+  componentDidMount () {
+    this.props.fetchTrends();
+    this.refreshInterval = setInterval(() => this.props.fetchTrends(), 36000);
+  }
+
+  componentWillUnmount () {
+    if (this.refreshInterval) {
+      clearInterval(this.refreshInterval);
+    }
+  }
+
+  render () {
+    const { trends } = this.props;
+
+    if (!trends || trends.isEmpty()) {
+      return null;
+    }
+
+    return (
+      <div className='getting-started__trends'>
+        {trends.take(3).map(hashtag => <Hashtag key={hashtag.get('name')} hashtag={hashtag} />)}
+      </div>
+    );
+  }
+
+}

app/javascript/mastodon/features/getting_started/containers/trends_container.js

@@ -0,0 +1,13 @@
+import { connect } from 'react-redux';
+import { fetchTrends } from '../../../actions/trends';
+import Trends from '../components/trends';
+
+const mapStateToProps = state => ({
+  trends: state.getIn(['trends', 'items']),
+});
+
+const mapDispatchToProps = dispatch => ({
+  fetchTrends: () => dispatch(fetchTrends()),
+});
+
+export default connect(mapStateToProps, mapDispatchToProps)(Trends);

app/javascript/mastodon/features/getting_started/index.js

@@ -7,12 +7,13 @@ 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 } from '../../initial_state';
+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' },
@@ -168,6 +169,8 @@ class GettingStarted extends ImmutablePureComponent {
 
           <LinkFooter withHotkeys={multiColumn} />
         </div>
+
+        {multiColumn && showTrends && <TrendsContainer />}
       </Column>
     );
   }