Add notification quick-filter bar in the frontend app (#9399)

* create FilterBar componer and its container, unstyled

* introduce basic styling for FilterBar

* add selection css

* allow FilterBar to display active CSS with js

* connect the FilterBar to the Redux state

* change getNotifications to use filter

* remove temporary comments

* add an option to turn the FilterBar off in settings

* fix showFilterBar data type to boolean

* fix eslint errors

* add English and Polish translations

* allowed filter bar overflow to accomodate for longer languages

* fix mispelled translation key

* add unified CSS look

* replace text in FilterBar with icons

* add tooltips

* replace text @ with an icon

* introduce simple and advanced filtering view

* add ability to toggle the advanced view

* add Polish translations

* change Advanced View description to be more clear

* make each filter flush notifications and load new ones, fixing pagination

* simplify getNotifications once frontend filtering is not needed for FilterBar

* add a semicolon

* Revert "simplify getNotifications once frontend filtering is not needed for FilterBar"

This reverts commit 9f4be7857135b0327814bd22a3e8a4e7b546f7cc.

* reset filter to 'all' when turning off FilterBar

11 files changed, 244 insertions, 7 deletions

diff --git a/app/javascript/mastodon/actions/notifications.js b/app/javascript/mastodon/actions/notifications.js
index d24f39ad2..4c145febc 100644
--- a/app/javascript/mastodon/actions/notifications.js
+++ b/app/javascript/mastodon/actions/notifications.js
@@ -8,6 +8,7 @@ import {
   importFetchedStatuses,
 } from './importer';
 import { defineMessages } from 'react-intl';
+import { List as ImmutableList } from 'immutable';
 import { unescapeHTML } from '../utils/html';
 import { getFilters, regexFromFilters } from '../selectors';
 
@@ -18,6 +19,8 @@ export const NOTIFICATIONS_EXPAND_REQUEST = 'NOTIFICATIONS_EXPAND_REQUEST';
 export const NOTIFICATIONS_EXPAND_SUCCESS = 'NOTIFICATIONS_EXPAND_SUCCESS';
 export const NOTIFICATIONS_EXPAND_FAIL    = 'NOTIFICATIONS_EXPAND_FAIL';
 
+export const NOTIFICATIONS_FILTER_SET = 'NOTIFICATIONS_FILTER_SET';
+
 export const NOTIFICATIONS_CLEAR      = 'NOTIFICATIONS_CLEAR';
 export const NOTIFICATIONS_SCROLL_TOP = 'NOTIFICATIONS_SCROLL_TOP';
 
@@ -88,10 +91,16 @@ export function updateNotifications(notification, intlMessages, intlLocale) {
 
 const excludeTypesFromSettings = state => state.getIn(['settings', 'notifications', 'shows']).filter(enabled => !enabled).keySeq().toJS();
 
+const excludeTypesFromFilter = filter => {
+  const allTypes = ImmutableList(['follow', 'favourite', 'reblog', 'mention']);
+  return allTypes.filterNot(item => item === filter).toJS();
+};
+
 const noOp = () => {};
 
 export function expandNotifications({ maxId } = {}, done = noOp) {
   return (dispatch, getState) => {
+    const activeFilter = getState().getIn(['settings', 'notifications', 'quickFilter', 'active']);
     const notifications = getState().get('notifications');
     const isLoadingMore = !!maxId;
 
@@ -102,7 +111,9 @@ export function expandNotifications({ maxId } = {}, done = noOp) {
 
     const params = {
       max_id: maxId,
-      exclude_types: excludeTypesFromSettings(getState()),
+      exclude_types: activeFilter === 'all'
+        ? excludeTypesFromSettings(getState())
+        : excludeTypesFromFilter(activeFilter),
     };
 
     if (!maxId && notifications.get('items').size > 0) {
@@ -167,3 +178,14 @@ export function scrollTopNotifications(top) {
     top,
   };
 };
+
+export function setFilter (filterType) {
+  return dispatch => {
+    dispatch({
+      type: NOTIFICATIONS_FILTER_SET,
+      path: ['notifications', 'quickFilter', 'active'],
+      value: filterType,
+    });
+    dispatch(expandNotifications());
+  };
+};
diff --git a/app/javascript/mastodon/features/notifications/components/column_settings.js b/app/javascript/mastodon/features/notifications/components/column_settings.js
index fcdf5c6e6..a334fd63c 100644
--- a/app/javascript/mastodon/features/notifications/components/column_settings.js
+++ b/app/javascript/mastodon/features/notifications/components/column_settings.js
@@ -21,9 +21,11 @@ export default class ColumnSettings extends React.PureComponent {
   render () {
     const { settings, pushSettings, onChange, onClear } = this.props;
 
-    const alertStr = <FormattedMessage id='notifications.column_settings.alert' defaultMessage='Desktop notifications' />;
-    const showStr  = <FormattedMessage id='notifications.column_settings.show' defaultMessage='Show in column' />;
-    const soundStr = <FormattedMessage id='notifications.column_settings.sound' defaultMessage='Play sound' />;
+    const filterShowStr = <FormattedMessage id='notifications.column_settings.filter_bar.show' defaultMessage='Show' />;
+    const filterAdvancedStr = <FormattedMessage id='notifications.column_settings.filter_bar.advanced' defaultMessage='Display all categories' />;
+    const alertStr  = <FormattedMessage id='notifications.column_settings.alert' defaultMessage='Desktop notifications' />;
+    const showStr   = <FormattedMessage id='notifications.column_settings.show' defaultMessage='Show in column' />;
+    const soundStr  = <FormattedMessage id='notifications.column_settings.sound' defaultMessage='Play sound' />;
 
     const showPushSettings = pushSettings.get('browserSupport') && pushSettings.get('isSubscribed');
     const pushStr = showPushSettings && <FormattedMessage id='notifications.column_settings.push' defaultMessage='Push notifications' />;
@@ -34,6 +36,16 @@ export default class ColumnSettings extends React.PureComponent {
           <ClearColumnButton onClick={onClear} />
         </div>
 
+        <div role='group' aria-labelledby='notifications-filter-bar'>
+          <span id='notifications-filter-bar' className='column-settings__section'>
+            <FormattedMessage id='notifications.column_settings.filter_bar.category' defaultMessage='Quick filter bar' />
+          </span>
+          <div className='column-settings__row'>
+            <SettingToggle id='show-filter-bar' prefix='notifications' settings={settings} settingPath={['quickFilter', 'show']} onChange={onChange} label={filterShowStr} />
+            <SettingToggle id='show-filter-bar' prefix='notifications' settings={settings} settingPath={['quickFilter', 'advanced']} onChange={onChange} label={filterAdvancedStr} />
+          </div>
+        </div>
+
         <div role='group' aria-labelledby='notifications-follow'>
           <span id='notifications-follow' className='column-settings__section'><FormattedMessage id='notifications.column_settings.follow' defaultMessage='New followers:' /></span>
 
diff --git a/app/javascript/mastodon/features/notifications/components/filter_bar.js b/app/javascript/mastodon/features/notifications/components/filter_bar.js
new file mode 100644
index 000000000..f95a2c9de
--- /dev/null
+++ b/app/javascript/mastodon/features/notifications/components/filter_bar.js
@@ -0,0 +1,93 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
+
+const tooltips = defineMessages({
+  mentions: { id: 'notifications.filter.mentions', defaultMessage: 'Mentions' },
+  favourites: { id: 'notifications.filter.favourites', defaultMessage: 'Favourites' },
+  boosts: { id: 'notifications.filter.boosts', defaultMessage: 'Boosts' },
+  follows: { id: 'notifications.filter.follows', defaultMessage: 'Follows' },
+});
+
+export default @injectIntl
+class FilterBar extends React.PureComponent {
+
+  static propTypes = {
+    selectFilter: PropTypes.func.isRequired,
+    selectedFilter: PropTypes.string.isRequired,
+    advancedMode: PropTypes.bool.isRequired,
+    intl: PropTypes.object.isRequired,
+  };
+
+  onClick (notificationType) {
+    return () => this.props.selectFilter(notificationType);
+  }
+
+  render () {
+    const { selectedFilter, advancedMode, intl } = this.props;
+    const renderedElement = !advancedMode ? (
+      <div className='notification__filter-bar'>
+        <button
+          className={selectedFilter === 'all' ? 'active' : ''}
+          onClick={this.onClick('all')}
+        >
+          <FormattedMessage
+            id='notifications.filter.all'
+            defaultMessage='All'
+          />
+        </button>
+        <button
+          className={selectedFilter === 'mention' ? 'active' : ''}
+          onClick={this.onClick('mention')}
+        >
+          <FormattedMessage
+            id='notifications.filter.mentions'
+            defaultMessage='Mentions'
+          />
+        </button>
+      </div>
+    ) : (
+      <div className='notification__filter-bar'>
+        <button
+          className={selectedFilter === 'all' ? 'active' : ''}
+          onClick={this.onClick('all')}
+        >
+          <FormattedMessage
+            id='notifications.filter.all'
+            defaultMessage='All'
+          />
+        </button>
+        <button
+          className={selectedFilter === 'mention' ? 'active' : ''}
+          onClick={this.onClick('mention')}
+          title={intl.formatMessage(tooltips.mentions)}
+        >
+          <i className='fa fa-fw fa-at' />
+        </button>
+        <button
+          className={selectedFilter === 'favourite' ? 'active' : ''}
+          onClick={this.onClick('favourite')}
+          title={intl.formatMessage(tooltips.favourites)}
+        >
+          <i className='fa fa-fw fa-star' />
+        </button>
+        <button
+          className={selectedFilter === 'reblog' ? 'active' : ''}
+          onClick={this.onClick('reblog')}
+          title={intl.formatMessage(tooltips.boosts)}
+        >
+          <i className='fa fa-fw fa-retweet' />
+        </button>
+        <button
+          className={selectedFilter === 'follow' ? 'active' : ''}
+          onClick={this.onClick('follow')}
+          title={intl.formatMessage(tooltips.follows)}
+        >
+          <i className='fa fa-fw fa-user-plus' />
+        </button>
+      </div>
+    );
+    return renderedElement;
+  }
+
+}
diff --git a/app/javascript/mastodon/features/notifications/containers/column_settings_container.js b/app/javascript/mastodon/features/notifications/containers/column_settings_container.js
index e9cef0a7b..a67f26295 100644
--- a/app/javascript/mastodon/features/notifications/containers/column_settings_container.js
+++ b/app/javascript/mastodon/features/notifications/containers/column_settings_container.js
@@ -2,6 +2,7 @@ import { connect } from 'react-redux';
 import { defineMessages, injectIntl } from 'react-intl';
 import ColumnSettings from '../components/column_settings';
 import { changeSetting } from '../../../actions/settings';
+import { setFilter } from '../../../actions/notifications';
 import { clearNotifications } from '../../../actions/notifications';
 import { changeAlerts as changePushNotifications } from '../../../actions/push_notifications';
 import { openModal } from '../../../actions/modal';
@@ -21,6 +22,9 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
   onChange (path, checked) {
     if (path[0] === 'push') {
       dispatch(changePushNotifications(path.slice(1), checked));
+    } else if (path[0] === 'quickFilter') {
+      dispatch(changeSetting(['notifications', ...path], checked));
+      dispatch(setFilter('all'));
     } else {
       dispatch(changeSetting(['notifications', ...path], checked));
     }
diff --git a/app/javascript/mastodon/features/notifications/containers/filter_bar_container.js b/app/javascript/mastodon/features/notifications/containers/filter_bar_container.js
new file mode 100644
index 000000000..4d495c290
--- /dev/null
+++ b/app/javascript/mastodon/features/notifications/containers/filter_bar_container.js
@@ -0,0 +1,16 @@
+import { connect } from 'react-redux';
+import FilterBar from '../components/filter_bar';
+import { setFilter } from '../../../actions/notifications';
+
+const makeMapStateToProps = state => ({
+  selectedFilter: state.getIn(['settings', 'notifications', 'quickFilter', 'active']),
+  advancedMode: state.getIn(['settings', 'notifications', 'quickFilter', 'advanced']),
+});
+
+const mapDispatchToProps = (dispatch) => ({
+  selectFilter (newActiveFilter) {
+    dispatch(setFilter(newActiveFilter));
+  },
+});
+
+export default connect(makeMapStateToProps, mapDispatchToProps)(FilterBar);
diff --git a/app/javascript/mastodon/features/notifications/index.js b/app/javascript/mastodon/features/notifications/index.js
index aa82dbbb9..9430b2050 100644
--- a/app/javascript/mastodon/features/notifications/index.js
+++ b/app/javascript/mastodon/features/notifications/index.js
@@ -9,6 +9,7 @@ import { addColumn, removeColumn, moveColumn } from '../../actions/columns';
 import NotificationContainer from './containers/notification_container';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
 import ColumnSettingsContainer from './containers/column_settings_container';
+import FilterBarContainer from './containers/filter_bar_container';
 import { createSelector } from 'reselect';
 import { List as ImmutableList } from 'immutable';
 import { debounce } from 'lodash';
@@ -20,11 +21,22 @@ const messages = defineMessages({
 });
 
 const getNotifications = createSelector([
+  state => state.getIn(['settings', 'notifications', 'quickFilter', 'show']),
+  state => state.getIn(['settings', 'notifications', 'quickFilter', 'active']),
   state => ImmutableList(state.getIn(['settings', 'notifications', 'shows']).filter(item => !item).keys()),
   state => state.getIn(['notifications', 'items']),
-], (excludedTypes, notifications) => notifications.filterNot(item => item !== null && excludedTypes.includes(item.get('type'))));
+], (showFilterBar, allowedType, excludedTypes, notifications) => {
+  if (!showFilterBar || allowedType === 'all') {
+    // used if user changed the notification settings after loading the notifications from the server
+    // otherwise a list of notifications will come pre-filtered from the backend
+    // we need to turn it off for FilterBar in order not to block ourselves from seeing a specific category
+    return notifications.filterNot(item => item !== null && excludedTypes.includes(item.get('type')));
+  }
+  return notifications.filter(item => item !== null && allowedType === item.get('type'));
+});
 
 const mapStateToProps = state => ({
+  showFilterBar: state.getIn(['settings', 'notifications', 'quickFilter', 'show']),
   notifications: getNotifications(state),
   isLoading: state.getIn(['notifications', 'isLoading'], true),
   isUnread: state.getIn(['notifications', 'unread']) > 0,
@@ -38,6 +50,7 @@ class Notifications extends React.PureComponent {
   static propTypes = {
     columnId: PropTypes.string,
     notifications: ImmutablePropTypes.list.isRequired,
+    showFilterBar: PropTypes.bool.isRequired,
     dispatch: PropTypes.func.isRequired,
     shouldUpdateScroll: PropTypes.func,
     intl: PropTypes.object.isRequired,
@@ -117,12 +130,16 @@ class Notifications extends React.PureComponent {
   }
 
   render () {
-    const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore } = this.props;
+    const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore, showFilterBar } = this.props;
     const pinned = !!columnId;
     const emptyMessage = <FormattedMessage id='empty_column.notifications' defaultMessage="You don't have any notifications yet. Interact with others to start the conversation." />;
 
     let scrollableContent = null;
 
+    const filterBarContainer = showFilterBar
+      ? (<FilterBarContainer />)
+      : null;
+
     if (isLoading && this.scrollableContent) {
       scrollableContent = this.scrollableContent;
     } else if (notifications.size > 0 || hasMore) {
@@ -179,7 +196,7 @@ class Notifications extends React.PureComponent {
         >
           <ColumnSettingsContainer />
         </ColumnHeader>
-
+        {filterBarContainer}
         {scrollContainer}
       </Column>
     );
diff --git a/app/javascript/mastodon/locales/en.json b/app/javascript/mastodon/locales/en.json
index 9a15d84b7..414b9def3 100644
--- a/app/javascript/mastodon/locales/en.json
+++ b/app/javascript/mastodon/locales/en.json
@@ -223,6 +223,14 @@
   "notification.reblog": "{name} boosted your status",
   "notifications.clear": "Clear notifications",
   "notifications.clear_confirmation": "Are you sure you want to permanently clear all your notifications?",
+  "notifications.filter.all": "All",
+  "notifications.filter.mentions": "Mentions",
+  "notifications.filter.favourites": "Favourites",
+  "notifications.filter.boosts": "Boosts",
+  "notifications.filter.follows": "Follows",
+  "notifications.column_settings.filter_bar.category": "Quick filter bar",
+  "notifications.column_settings.filter_bar.show": "Show",
+  "notifications.column_settings.filter_bar.advanced": "Display all categories",
   "notifications.column_settings.alert": "Desktop notifications",
   "notifications.column_settings.favourite": "Favourites:",
   "notifications.column_settings.follow": "New followers:",
diff --git a/app/javascript/mastodon/locales/pl.json b/app/javascript/mastodon/locales/pl.json
index ae673cf9f..0589b06f5 100644
--- a/app/javascript/mastodon/locales/pl.json
+++ b/app/javascript/mastodon/locales/pl.json
@@ -223,6 +223,14 @@
   "notification.reblog": "{name} podbił(a) Twój wpis",
   "notifications.clear": "Wyczyść powiadomienia",
   "notifications.clear_confirmation": "Czy na pewno chcesz bezpowrotnie usunąć wszystkie powiadomienia?",
+  "notifications.filter.all": "Wszystkie",
+  "notifications.filter.mentions": "Wspomnienia",
+  "notifications.filter.favourites": "Ulubione",
+  "notifications.filter.boosts": "Podbicia",
+  "notifications.filter.follows": "Śledzenia",
+  "notifications.column_settings.filter_bar.category": "Szybkie filtrowanie",
+  "notifications.column_settings.filter_bar.show": "Pokaż",
+  "notifications.column_settings.filter_bar.advanced": "Wyświetl wszystkie kategorie",
   "notifications.column_settings.alert": "Powiadomienia na pulpicie",
   "notifications.column_settings.favourite": "Dodanie do ulubionych:",
   "notifications.column_settings.follow": "Nowi śledzący:",
diff --git a/app/javascript/mastodon/reducers/notifications.js b/app/javascript/mastodon/reducers/notifications.js
index d71ae00ae..19a02f5b1 100644
--- a/app/javascript/mastodon/reducers/notifications.js
+++ b/app/javascript/mastodon/reducers/notifications.js
@@ -3,6 +3,7 @@ import {
   NOTIFICATIONS_EXPAND_SUCCESS,
   NOTIFICATIONS_EXPAND_REQUEST,
   NOTIFICATIONS_EXPAND_FAIL,
+  NOTIFICATIONS_FILTER_SET,
   NOTIFICATIONS_CLEAR,
   NOTIFICATIONS_SCROLL_TOP,
 } from '../actions/notifications';
@@ -98,6 +99,8 @@ export default function notifications(state = initialState, action) {
     return state.set('isLoading', true);
   case NOTIFICATIONS_EXPAND_FAIL:
     return state.set('isLoading', false);
+  case NOTIFICATIONS_FILTER_SET:
+    return state.set('items', ImmutableList()).set('hasMore', true);
   case NOTIFICATIONS_SCROLL_TOP:
     return updateTop(state, action.top);
   case NOTIFICATIONS_UPDATE:
diff --git a/app/javascript/mastodon/reducers/settings.js b/app/javascript/mastodon/reducers/settings.js
index 12bcc2583..2e1878cf7 100644
--- a/app/javascript/mastodon/reducers/settings.js
+++ b/app/javascript/mastodon/reducers/settings.js
@@ -1,4 +1,5 @@
 import { SETTING_CHANGE, SETTING_SAVE } from '../actions/settings';
+import { NOTIFICATIONS_FILTER_SET } from '../actions/notifications';
 import { COLUMN_ADD, COLUMN_REMOVE, COLUMN_MOVE, COLUMN_PARAMS_CHANGE } from '../actions/columns';
 import { STORE_HYDRATE } from '../actions/store';
 import { EMOJI_USE } from '../actions/emojis';
@@ -32,6 +33,12 @@ const initialState = ImmutableMap({
       mention: true,
     }),
 
+    quickFilter: ImmutableMap({
+      active: 'all',
+      show: true,
+      advanced: false,
+    }),
+
     shows: ImmutableMap({
       follow: true,
       favourite: true,
@@ -112,6 +119,7 @@ export default function settings(state = initialState, action) {
   switch(action.type) {
   case STORE_HYDRATE:
     return hydrate(state, action.state.get('settings'));
+  case NOTIFICATIONS_FILTER_SET:
   case SETTING_CHANGE:
     return state
       .setIn(action.path, action.value)
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index c880e99a9..1c1b8c506 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1484,6 +1484,52 @@ a.account__display-name {
   }
 }
 
+.notification__filter-bar {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: space-between;
+  background: $ui-base-color;
+
+  & > button {
+    position: relative;
+    flex-grow: 1;
+    color: $primary-text-color;
+    padding: 10px 5px 12px;
+    text-decoration: none;
+    font-weight: 400;
+    font-size: 15px;
+    line-height: 18px;
+    background: darken($ui-base-color, 4%);
+    border: 0;
+    border-bottom: 1px solid lighten($ui-base-color, 8%);
+    cursor: default;
+
+    &.active {
+      color: $secondary-text-color;
+
+      &::before,
+      &::after {
+        display: block;
+        content: "";
+        position: absolute;
+        bottom: 0;
+        left: 50%;
+        width: 0;
+        height: 0;
+        transform: translateX(-50%);
+        border-style: solid;
+        border-width: 0 10px 10px;
+        border-color: transparent transparent lighten($ui-base-color, 8%);
+      }
+
+      &::after {
+        bottom: -1px;
+        border-color: transparent transparent $ui-base-color;
+      }
+    }
+  }
+}
+
 .notification__message {
   margin: 0 10px 0 68px;
   padding: 8px 0 0;