Remove trending hashtags (#7711)

* Delete trends_controller.rb

* Update routes.rb

* Update trending_tags.rb

* Update index.js

* Update index.js

* Update search_results.js

* Update async-components.js

* Update index.js

* Delete trends.js

* Delete trends.js

* Delete trends_container.js

* Delete trends.js

* Update search_results.js

* Update search_results_container.js

12 files changed, 2 insertions, 225 deletions

diff --git a/app/controllers/api/v1/trends_controller.rb b/app/controllers/api/v1/trends_controller.rb
deleted file mode 100644
index bcea9857e..000000000
--- a/app/controllers/api/v1/trends_controller.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-# frozen_string_literal: true
-
-class Api::V1::TrendsController < Api::BaseController
-  before_action :set_tags
-
-  respond_to :json
-
-  def index
-    render json: @tags, each_serializer: REST::TagSerializer
-  end
-
-  private
-
-  def set_tags
-    @tags = TrendingTags.get(limit_param(10))
-  end
-end
diff --git a/app/javascript/mastodon/actions/trends.js b/app/javascript/mastodon/actions/trends.js
deleted file mode 100644
index 853e4f60a..000000000
--- a/app/javascript/mastodon/actions/trends.js
+++ /dev/null
@@ -1,32 +0,0 @@
-import api from '../api';
-
-export const TRENDS_FETCH_REQUEST = 'TRENDS_FETCH_REQUEST';
-export const TRENDS_FETCH_SUCCESS = 'TRENDS_FETCH_SUCCESS';
-export const TRENDS_FETCH_FAIL    = 'TRENDS_FETCH_FAIL';
-
-export const fetchTrends = () => (dispatch, getState) => {
-  dispatch(fetchTrendsRequest());
-
-  api(getState)
-    .get('/api/v1/trends')
-    .then(({ data }) => dispatch(fetchTrendsSuccess(data)))
-    .catch(err => dispatch(fetchTrendsFail(err)));
-};
-
-export const fetchTrendsRequest = () => ({
-  type: TRENDS_FETCH_REQUEST,
-  skipLoading: true,
-});
-
-export const fetchTrendsSuccess = trends => ({
-  type: TRENDS_FETCH_SUCCESS,
-  trends,
-  skipLoading: true,
-});
-
-export const fetchTrendsFail = error => ({
-  type: TRENDS_FETCH_FAIL,
-  error,
-  skipLoading: true,
-  skipAlert: true,
-});
diff --git a/app/javascript/mastodon/features/compose/components/search_results.js b/app/javascript/mastodon/features/compose/components/search_results.js
index cf022362e..c351b84bb 100644
--- a/app/javascript/mastodon/features/compose/components/search_results.js
+++ b/app/javascript/mastodon/features/compose/components/search_results.js
@@ -1,5 +1,4 @@
 import React from 'react';
-import PropTypes from 'prop-types';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import { FormattedMessage } from 'react-intl';
 import AccountContainer from '../../../containers/account_container';
@@ -11,36 +10,14 @@ export default class SearchResults extends ImmutablePureComponent {
 
   static propTypes = {
     results: ImmutablePropTypes.map.isRequired,
-    trends: ImmutablePropTypes.list,
-    fetchTrends: PropTypes.func.isRequired,
   };
 
-  componentDidMount () {
-    const { fetchTrends } = this.props;
-    fetchTrends();
-  }
-
   render () {
-    const { results, trends } = this.props;
+    const { results } = this.props;
 
     let accounts, statuses, hashtags;
     let count = 0;
 
-    if (results.isEmpty()) {
-      return (
-        <div className='search-results'>
-          <div className='trends'>
-            <div className='trends__header'>
-              <i className='fa fa-fire fa-fw' />
-              <FormattedMessage id='trends.header' defaultMessage='Trending now' />
-            </div>
-
-            {trends && trends.map(hashtag => <Hashtag key={hashtag.get('name')} hashtag={hashtag} />)}
-          </div>
-        </div>
-      );
-    }
-
     if (results.get('accounts') && results.get('accounts').size > 0) {
       count   += results.get('accounts').size;
       accounts = (
diff --git a/app/javascript/mastodon/features/compose/containers/search_results_container.js b/app/javascript/mastodon/features/compose/containers/search_results_container.js
index 2f879f9d9..16d95d417 100644
--- a/app/javascript/mastodon/features/compose/containers/search_results_container.js
+++ b/app/javascript/mastodon/features/compose/containers/search_results_container.js
@@ -1,14 +1,8 @@
 import { connect } from 'react-redux';
 import SearchResults from '../components/search_results';
-import { fetchTrends } from '../../../actions/trends';
 
 const mapStateToProps = state => ({
   results: state.getIn(['search', 'results']),
-  trends: state.getIn(['trends', 'items']),
 });
 
-const mapDispatchToProps = dispatch => ({
-  fetchTrends: () => dispatch(fetchTrends()),
-});
-
-export default connect(mapStateToProps, mapDispatchToProps)(SearchResults);
+export default connect(mapStateToProps)(SearchResults);
diff --git a/app/javascript/mastodon/features/getting_started/components/trends.js b/app/javascript/mastodon/features/getting_started/components/trends.js
deleted file mode 100644
index 96a646bea..000000000
--- a/app/javascript/mastodon/features/getting_started/components/trends.js
+++ /dev/null
@@ -1,71 +0,0 @@
-import classNames from 'classnames';
-import React from 'react';
-import ImmutablePureComponent from 'react-immutable-pure-component';
-import PropTypes from 'prop-types';
-import ImmutablePropTypes from 'react-immutable-proptypes';
-import { FormattedMessage, defineMessages } from 'react-intl';
-import Hashtag from '../../../components/hashtag';
-import { Link } from 'react-router-dom';
-
-const messages = defineMessages({
-  refresh_trends: { id: 'trends.refresh', defaultMessage: 'Refresh' },
-});
-
-export default class Trends extends ImmutablePureComponent {
-
-  static defaultProps = {
-    loading: false,
-  };
-
-  static propTypes = {
-    trends: ImmutablePropTypes.list,
-    loading: PropTypes.bool.isRequired,
-    showTrends: PropTypes.bool.isRequired,
-    fetchTrends: PropTypes.func.isRequired,
-    toggleTrends: PropTypes.func.isRequired,
-  };
-
-  componentDidMount () {
-    setTimeout(() => this.props.fetchTrends(), 5000);
-  }
-
-  handleRefreshTrends = () => {
-    this.props.fetchTrends();
-  }
-
-  handleToggle = () => {
-    this.props.toggleTrends(!this.props.showTrends);
-  }
-
-  render () {
-    const { intl, trends, loading, showTrends } = this.props;
-
-    if (!trends || trends.size < 1) {
-      return null;
-    }
-
-    return (
-      <div className='getting-started__trends'>
-        <div className='column-header__wrapper'>
-          <h1 className='column-header'>
-            <button>
-              <i className='fa fa-fire fa-fw' />
-              <FormattedMessage id='trends.header' defaultMessage='Trending now' />
-            </button>
-
-            <div className='column-header__buttons'>
-              {showTrends && <button onClick={this.handleRefreshTrends} className='column-header__button' title={intl.formatMessage(messages.refresh_trends)} aria-label={intl.formatMessage(messages.refresh_trends)} disabled={loading}><i className={classNames('fa', 'fa-refresh', { 'fa-spin': loading })} /></button>}
-              <button onClick={this.handleToggle} className='column-header__button'><i className={classNames('fa', showTrends ? 'fa-chevron-down' : 'fa-chevron-up')} /></button>
-            </div>
-          </h1>
-        </div>
-
-        {showTrends && <div className='getting-started__scrollable'>
-          {trends.take(3).map(hashtag => <Hashtag key={hashtag.get('name')} hashtag={hashtag} />)}
-          <Link to='/trends' className='load-more'><FormattedMessage id='status.load_more' defaultMessage='Load more' /></Link>
-        </div>}
-      </div>
-    );
-  }
-
-}
diff --git a/app/javascript/mastodon/features/getting_started/containers/trends_container.js b/app/javascript/mastodon/features/getting_started/containers/trends_container.js
deleted file mode 100644
index 65faeae86..000000000
--- a/app/javascript/mastodon/features/getting_started/containers/trends_container.js
+++ /dev/null
@@ -1,18 +0,0 @@
-import { connect } from 'react-redux';
-import { injectIntl } from 'react-intl';
-import { fetchTrends } from '../../../actions/trends';
-import Trends from '../components/trends';
-import { changeSetting } from '../../../actions/settings';
-
-const mapStateToProps = state => ({
-  trends: state.getIn(['trends', 'items']),
-  loading: state.getIn(['trends', 'isLoading']),
-  showTrends: state.getIn(['settings', 'trends', 'show']),
-});
-
-const mapDispatchToProps = dispatch => ({
-  fetchTrends: () => dispatch(fetchTrends()),
-  toggleTrends: show => dispatch(changeSetting(['trends', 'show'], show)),
-});
-
-export default injectIntl(connect(mapStateToProps, mapDispatchToProps)(Trends));
diff --git a/app/javascript/mastodon/features/getting_started/index.js b/app/javascript/mastodon/features/getting_started/index.js
index 67a5b282a..115dfd2b9 100644
--- a/app/javascript/mastodon/features/getting_started/index.js
+++ b/app/javascript/mastodon/features/getting_started/index.js
@@ -12,7 +12,6 @@ import { fetchFollowRequests } from '../../actions/accounts';
 import { List as ImmutableList } from 'immutable';
 import { Link } from 'react-router-dom';
 import NavigationBar from '../compose/components/navigation_bar';
-import TrendsContainer from './containers/trends_container';
 
 const messages = defineMessages({
   home_timeline: { id: 'tabs_bar.home', defaultMessage: 'Home' },
@@ -132,8 +131,6 @@ export default class GettingStarted extends ImmutablePureComponent {
           {navItems}
         </div>
 
-        {multiColumn && <TrendsContainer />}
-
         {!multiColumn && <div className='flex-spacer' />}
 
         <div className='getting-started getting-started__footer'>
diff --git a/app/javascript/mastodon/features/ui/index.js b/app/javascript/mastodon/features/ui/index.js
index bfed02f98..f1409b946 100644
--- a/app/javascript/mastodon/features/ui/index.js
+++ b/app/javascript/mastodon/features/ui/index.js
@@ -42,7 +42,6 @@ import {
   Mutes,
   PinnedStatuses,
   Lists,
-  Trends,
 } from './util/async-components';
 import { HotKeys } from 'react-hotkeys';
 import { me } from '../../initial_state';
@@ -155,7 +154,6 @@ class SwitchingColumnsArea extends React.PureComponent {
           <WrappedRoute path='/pinned' component={PinnedStatuses} content={children} />
 
           <WrappedRoute path='/search' component={Compose} content={children} componentParams={{ isSearchPage: true }} />
-          <WrappedRoute path='/trends' component={Trends} content={children} />
 
           <WrappedRoute path='/statuses/new' component={Compose} content={children} />
           <WrappedRoute path='/statuses/:statusId' exact component={Status} content={children} />
diff --git a/app/javascript/mastodon/features/ui/util/async-components.js b/app/javascript/mastodon/features/ui/util/async-components.js
index dfc796a09..8cf2a6e7d 100644
--- a/app/javascript/mastodon/features/ui/util/async-components.js
+++ b/app/javascript/mastodon/features/ui/util/async-components.js
@@ -129,7 +129,3 @@ export function EmbedModal () {
 export function ListEditor () {
   return import(/* webpackChunkName: "features/list_editor" */'../../list_editor');
 }
-
-export function Trends () {
-  return import(/* webpackChunkName: "features/trends" */'../../trends');
-}
diff --git a/app/javascript/mastodon/reducers/index.js b/app/javascript/mastodon/reducers/index.js
index 019c1f466..3d9a6a132 100644
--- a/app/javascript/mastodon/reducers/index.js
+++ b/app/javascript/mastodon/reducers/index.js
@@ -26,7 +26,6 @@ import height_cache from './height_cache';
 import custom_emojis from './custom_emojis';
 import lists from './lists';
 import listEditor from './list_editor';
-import trends from './trends';
 
 const reducers = {
   dropdown_menu,
@@ -56,7 +55,6 @@ const reducers = {
   custom_emojis,
   lists,
   listEditor,
-  trends,
 };
 
 export default combineReducers(reducers);
diff --git a/app/javascript/mastodon/reducers/trends.js b/app/javascript/mastodon/reducers/trends.js
deleted file mode 100644
index 5cecc8fca..000000000
--- a/app/javascript/mastodon/reducers/trends.js
+++ /dev/null
@@ -1,23 +0,0 @@
-import { TRENDS_FETCH_REQUEST, TRENDS_FETCH_SUCCESS, TRENDS_FETCH_FAIL } from '../actions/trends';
-import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
-
-const initialState = ImmutableMap({
-  items: ImmutableList(),
-  isLoading: false,
-});
-
-export default function trendsReducer(state = initialState, action) {
-  switch(action.type) {
-  case TRENDS_FETCH_REQUEST:
-    return state.set('isLoading', true);
-  case TRENDS_FETCH_SUCCESS:
-    return state.withMutations(map => {
-      map.set('items', fromJS(action.trends));
-      map.set('isLoading', false);
-    });
-  case TRENDS_FETCH_FAIL:
-    return state.set('isLoading', false);
-  default:
-    return state;
-  }
-};
diff --git a/app/models/trending_tags.rb b/app/models/trending_tags.rb
index 287de2a8a..c3641d7fd 100644
--- a/app/models/trending_tags.rb
+++ b/app/models/trending_tags.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
 class TrendingTags
-  KEY                  = 'trending_tags'
   EXPIRE_HISTORY_AFTER = 7.days.seconds
-  THRESHOLD            = 5
 
   class << self
     def record_use!(tag, account, at_time = Time.now.utc)
@@ -11,30 +9,10 @@ class TrendingTags
 
       increment_historical_use!(tag.id, at_time)
       increment_unique_use!(tag.id, account.id, at_time)
-      increment_vote!(tag.id, at_time)
-    end
-
-    def get(limit)
-      tag_ids = redis.zrevrange(KEY, 0, limit).map(&:to_i)
-      tags    = Tag.where(id: tag_ids).to_a.map { |tag| [tag.id, tag] }.to_h
-      tag_ids.map { |tag_id| tags[tag_id] }.compact
     end
 
     private
 
-    def increment_vote!(tag_id, at_time)
-      expected = redis.pfcount("activity:tags:#{tag_id}:#{(at_time - 1.day).beginning_of_day.to_i}:accounts").to_f
-      expected = 1.0 if expected.zero?
-      observed = redis.pfcount("activity:tags:#{tag_id}:#{at_time.beginning_of_day.to_i}:accounts").to_f
-
-      if expected > observed || observed < THRESHOLD
-        redis.zrem(KEY, tag_id.to_s)
-      else
-        score = ((observed - expected)**2) / expected
-        redis.zadd(KEY, score, tag_id.to_s)
-      end
-    end
-
     def increment_historical_use!(tag_id, at_time)
       key = "activity:tags:#{tag_id}:#{at_time.beginning_of_day.to_i}"
       redis.incrby(key, 1)