[Glitch] Add option to disable real-time updates in web UI

Port 729723f857 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

app/javascript/flavours/glitch/actions/notifications.js

@@ -12,6 +12,8 @@ import { defineMessages } from 'react-intl';
 import { List as ImmutableList } from 'immutable';
 import { unescapeHTML } from 'flavours/glitch/util/html';
 import { getFiltersRegex } from 'flavours/glitch/selectors';
+import { usePendingItems as preferPendingItems } from 'flavours/glitch/util/initial_state';
+import compareId from 'flavours/glitch/util/compare_id';
 
 export const NOTIFICATIONS_UPDATE = 'NOTIFICATIONS_UPDATE';
 
@@ -34,6 +36,7 @@ export const NOTIFICATIONS_FILTER_SET = 'NOTIFICATIONS_FILTER_SET';
 
 export const NOTIFICATIONS_CLEAR        = 'NOTIFICATIONS_CLEAR';
 export const NOTIFICATIONS_SCROLL_TOP   = 'NOTIFICATIONS_SCROLL_TOP';
+export const NOTIFICATIONS_LOAD_PENDING = 'NOTIFICATIONS_LOAD_PENDING';
 
 export const NOTIFICATIONS_MOUNT   = 'NOTIFICATIONS_MOUNT';
 export const NOTIFICATIONS_UNMOUNT = 'NOTIFICATIONS_UNMOUNT';
@@ -52,6 +55,10 @@ const fetchRelatedRelationships = (dispatch, notifications) => {
   }
 };
 
+export const loadPending = () => ({
+  type: NOTIFICATIONS_LOAD_PENDING,
+});
+
 export function updateNotifications(notification, intlMessages, intlLocale) {
   return (dispatch, getState) => {
     const showInColumn = getState().getIn(['settings', 'notifications', 'shows', notification.type], true);
@@ -83,6 +90,7 @@ export function updateNotifications(notification, intlMessages, intlLocale) {
       dispatch({
         type: NOTIFICATIONS_UPDATE,
         notification,
+        usePendingItems: preferPendingItems,
         meta: (playSound && !filtered) ? { sound: 'boop' } : undefined,
       });
 
@@ -136,9 +144,18 @@ export function expandNotifications({ maxId } = {}, done = noOp) {
         : excludeTypesFromFilter(activeFilter),
     };
 
-    if (!maxId && notifications.get('items').size > 0) {
+    if (!params.max_id && (notifications.get('items', ImmutableList()).size + notifications.get('pendingItems', ImmutableList()).size) > 0) {
-      params.since_id = notifications.getIn(['items', 0, 'id']);
+      const a = notifications.getIn(['pendingItems', 0, 'id']);
+      const b = notifications.getIn(['items', 0, 'id']);
+
+      if (a && b && compareId(a, b) > 0) {
+        params.since_id = a;
+      } else {
+        params.since_id = b || a;
       }
+    }
+
+    const isLoadingRecent = !!params.since_id;
 
     dispatch(expandNotificationsRequest(isLoadingMore));
 
@@ -148,7 +165,7 @@ export function expandNotifications({ maxId } = {}, done = noOp) {
       dispatch(importFetchedAccounts(response.data.map(item => item.account)));
       dispatch(importFetchedStatuses(response.data.map(item => item.status).filter(status => !!status)));
 
-      dispatch(expandNotificationsSuccess(response.data, next ? next.uri : null, isLoadingMore));
+      dispatch(expandNotificationsSuccess(response.data, next ? next.uri : null, isLoadingMore, isLoadingRecent && preferPendingItems));
       fetchRelatedRelationships(dispatch, response.data);
       done();
     }).catch(error => {
@@ -165,13 +182,12 @@ export function expandNotificationsRequest(isLoadingMore) {
   };
 };
 
-export function expandNotificationsSuccess(notifications, next, isLoadingMore) {
+export function expandNotificationsSuccess(notifications, next, isLoadingMore, usePendingItems) {
   return {
     type: NOTIFICATIONS_EXPAND_SUCCESS,
     notifications,
-    accounts: notifications.map(item => item.account),
-    statuses: notifications.map(item => item.status).filter(status => !!status),
     next,
+    usePendingItems,
     skipLoading: !isLoadingMore,
   };
 };

app/javascript/flavours/glitch/actions/timelines.js

@@ -1,6 +1,8 @@
 import { importFetchedStatus, importFetchedStatuses } from './importer';
 import api, { getLinks } from 'flavours/glitch/util/api';
 import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
+import compareId from 'flavours/glitch/util/compare_id';
+import { usePendingItems as preferPendingItems } from 'flavours/glitch/util/initial_state';
 
 export const TIMELINE_UPDATE  = 'TIMELINE_UPDATE';
 export const TIMELINE_DELETE  = 'TIMELINE_DELETE';
@@ -11,9 +13,14 @@ export const TIMELINE_EXPAND_SUCCESS = 'TIMELINE_EXPAND_SUCCESS';
 export const TIMELINE_EXPAND_FAIL    = 'TIMELINE_EXPAND_FAIL';
 
 export const TIMELINE_SCROLL_TOP   = 'TIMELINE_SCROLL_TOP';
-
+export const TIMELINE_LOAD_PENDING = 'TIMELINE_LOAD_PENDING';
-export const TIMELINE_CONNECT    = 'TIMELINE_CONNECT';
 export const TIMELINE_DISCONNECT   = 'TIMELINE_DISCONNECT';
+export const TIMELINE_CONNECT      = 'TIMELINE_CONNECT';
+
+export const loadPending = timeline => ({
+  type: TIMELINE_LOAD_PENDING,
+  timeline,
+});
 
 export function updateTimeline(timeline, status, accept) {
   return dispatch => {
@@ -27,6 +34,7 @@ export function updateTimeline(timeline, status, accept) {
       type: TIMELINE_UPDATE,
       timeline,
       status,
+      usePendingItems: preferPendingItems,
     });
   };
 };
@@ -71,8 +79,15 @@ export function expandTimeline(timelineId, path, params = {}, done = noOp) {
       return;
     }
 
-    if (!params.max_id && !params.pinned && timeline.get('items', ImmutableList()).size > 0) {
+    if (!params.max_id && !params.pinned && (timeline.get('items', ImmutableList()).size + timeline.get('pendingItems', ImmutableList()).size) > 0) {
-      params.since_id = timeline.getIn(['items', 0]);
+      const a = timeline.getIn(['pendingItems', 0]);
+      const b = timeline.getIn(['items', 0]);
+
+      if (a && b && compareId(a, b) > 0) {
+        params.since_id = a;
+      } else {
+        params.since_id = b || a;
+      }
     }
 
     const isLoadingRecent = !!params.since_id;
@@ -82,7 +97,7 @@ export function expandTimeline(timelineId, path, params = {}, done = noOp) {
     api(getState).get(path, { params }).then(response => {
       const next = getLinks(response).refs.find(link => link.rel === 'next');
       dispatch(importFetchedStatuses(response.data));
-      dispatch(expandTimelineSuccess(timelineId, response.data, next ? next.uri : null, response.code === 206, isLoadingRecent, isLoadingMore));
+      dispatch(expandTimelineSuccess(timelineId, response.data, next ? next.uri : null, response.code === 206, isLoadingRecent, isLoadingMore, isLoadingRecent && preferPendingItems));
       done();
     }).catch(error => {
       dispatch(expandTimelineFail(timelineId, error, isLoadingMore));
@@ -117,7 +132,7 @@ export function expandTimelineRequest(timeline, isLoadingMore) {
   };
 };
 
-export function expandTimelineSuccess(timeline, statuses, next, partial, isLoadingRecent, isLoadingMore) {
+export function expandTimelineSuccess(timeline, statuses, next, partial, isLoadingRecent, isLoadingMore, usePendingItems) {
   return {
     type: TIMELINE_EXPAND_SUCCESS,
     timeline,
@@ -125,6 +140,7 @@ export function expandTimelineSuccess(timeline, statuses, next, partial, isLoadi
     next,
     partial,
     isLoadingRecent,
+    usePendingItems,
     skipLoading: !isLoadingMore,
   };
 };
@@ -153,9 +169,8 @@ export function connectTimeline(timeline) {
   };
 };
 
-export function disconnectTimeline(timeline) {
+export const disconnectTimeline = timeline => ({
-  return {
   type: TIMELINE_DISCONNECT,
   timeline,
-  };
+  usePendingItems: preferPendingItems,
-};
+});

app/javascript/flavours/glitch/components/load_pending.js

@@ -0,0 +1,22 @@
+import React from 'react';
+import { FormattedMessage } from 'react-intl';
+import PropTypes from 'prop-types';
+
+export default class LoadPending extends React.PureComponent {
+
+  static propTypes = {
+    onClick: PropTypes.func,
+    count: PropTypes.number,
+  }
+
+  render() {
+    const { count } = this.props;
+
+    return (
+      <button className='load-more load-gap' onClick={this.props.onClick}>
+        <FormattedMessage id='load_pending' defaultMessage='{count, plural, one {# new item} other {# new items}}' values={{ count }} />
+      </button>
+    );
+  }
+
+}

app/javascript/flavours/glitch/components/scrollable_list.js

@@ -3,6 +3,7 @@ import { ScrollContainer } from 'react-router-scroll-4';
 import PropTypes from 'prop-types';
 import IntersectionObserverArticleContainer from 'flavours/glitch/containers/intersection_observer_article_container';
 import LoadMore from './load_more';
+import LoadPending from './load_pending';
 import IntersectionObserverWrapper from 'flavours/glitch/util/intersection_observer_wrapper';
 import { throttle } from 'lodash';
 import { List as ImmutableList } from 'immutable';
@@ -21,6 +22,7 @@ export default class ScrollableList extends PureComponent {
   static propTypes = {
     scrollKey: PropTypes.string.isRequired,
     onLoadMore: PropTypes.func,
+    onLoadPending: PropTypes.func,
     onScrollToTop: PropTypes.func,
     onScroll: PropTypes.func,
     trackScroll: PropTypes.bool,
@@ -28,6 +30,7 @@ export default class ScrollableList extends PureComponent {
     isLoading: PropTypes.bool,
     showLoading: PropTypes.bool,
     hasMore: PropTypes.bool,
+    numPending: PropTypes.number,
     prepend: PropTypes.node,
     alwaysPrepend: PropTypes.bool,
     emptyMessage: PropTypes.node,
@@ -222,12 +225,18 @@ export default class ScrollableList extends PureComponent {
     return !(location.state && location.state.mastodonModalOpen);
   }
 
+  handleLoadPending = e => {
+    e.preventDefault();
+    this.props.onLoadPending();
+  }
+
   render () {
-    const { children, scrollKey, trackScroll, shouldUpdateScroll, showLoading, isLoading, hasMore, prepend, alwaysPrepend, emptyMessage, onLoadMore } = this.props;
+    const { children, scrollKey, trackScroll, shouldUpdateScroll, showLoading, isLoading, hasMore, numPending, prepend, alwaysPrepend, emptyMessage, onLoadMore } = this.props;
     const { fullscreen } = this.state;
     const childrenCount = React.Children.count(children);
 
     const loadMore     = (hasMore && onLoadMore) ? <LoadMore visible={!isLoading} onClick={this.handleLoadMore} /> : null;
+    const loadPending  = (numPending > 0) ? <LoadPending count={numPending} onClick={this.handleLoadPending} /> : null;
     let scrollableArea = null;
 
     if (showLoading) {
@@ -248,6 +257,8 @@ export default class ScrollableList extends PureComponent {
           <div role='feed' className='item-list'>
             {prepend}
 
+            {loadPending}
+
             {React.Children.map(this.props.children, (child, index) => (
               <IntersectionObserverArticleContainer
                 key={child.key}

app/javascript/flavours/glitch/features/community_timeline/components/column_settings.js

@@ -26,7 +26,7 @@ export default class ColumnSettings extends React.PureComponent {
     return (
       <div>
         <div className='column-settings__row'>
-          <SettingToggle settings={settings} settingPath={['other', 'onlyMedia']} onChange={onChange} label={<FormattedMessage id='community.column_settings.media_only' defaultMessage='Media Only' />} />
+          <SettingToggle settings={settings} settingPath={['other', 'onlyMedia']} onChange={onChange} label={<FormattedMessage id='community.column_settings.media_only' defaultMessage='Media only' />} />
         </div>
 
         <span className='column-settings__section'><FormattedMessage id='home.column_settings.advanced' defaultMessage='Advanced' /></span>

app/javascript/flavours/glitch/features/notifications/components/setting_toggle.js

@@ -12,6 +12,7 @@ export default class SettingToggle extends React.PureComponent {
     label: PropTypes.node.isRequired,
     meta: PropTypes.node,
     onChange: PropTypes.func.isRequired,
+    defaultValue: PropTypes.bool,
   }
 
   onChange = ({ target }) => {
@@ -19,12 +20,12 @@ export default class SettingToggle extends React.PureComponent {
   }
 
   render () {
-    const { prefix, settings, settingPath, label, meta } = this.props;
+    const { prefix, settings, settingPath, label, meta, defaultValue } = this.props;
     const id = ['setting-toggle', prefix, ...settingPath].filter(Boolean).join('-');
 
     return (
       <div className='setting-toggle'>
-        <Toggle id={id} checked={settings.getIn(settingPath)} onChange={this.onChange} onKeyDown={this.onKeyDown} />
+        <Toggle id={id} checked={settings.getIn(settingPath, defaultValue)} onChange={this.onChange} onKeyDown={this.onKeyDown} />
         <label htmlFor={id} className='setting-toggle__label'>{label}</label>
         {meta && <span className='setting-meta__label'>{meta}</span>}
       </div>

app/javascript/flavours/glitch/features/notifications/index.js

@@ -10,6 +10,7 @@ import {
   scrollTopNotifications,
   mountNotifications,
   unmountNotifications,
+  loadPending,
 } from 'flavours/glitch/actions/notifications';
 import { addColumn, removeColumn, moveColumn } from 'flavours/glitch/actions/columns';
 import NotificationContainer from './containers/notification_container';
@@ -48,6 +49,7 @@ const mapStateToProps = state => ({
   isLoading: state.getIn(['notifications', 'isLoading'], true),
   isUnread: state.getIn(['notifications', 'unread']) > 0,
   hasMore: state.getIn(['notifications', 'hasMore']),
+  numPending: state.getIn(['notifications', 'pendingItems'], ImmutableList()).size,
   notifCleaningActive: state.getIn(['notifications', 'cleaningMode']),
 });
 
@@ -80,6 +82,7 @@ export default class Notifications extends React.PureComponent {
     isUnread: PropTypes.bool,
     multiColumn: PropTypes.bool,
     hasMore: PropTypes.bool,
+    numPending: PropTypes.number,
     localSettings: ImmutablePropTypes.map,
     notifCleaningActive: PropTypes.bool,
     onEnterCleaningMode: PropTypes.func,
@@ -100,6 +103,10 @@ export default class Notifications extends React.PureComponent {
     this.props.dispatch(expandNotifications({ maxId: last && last.get('id') }));
   }, 300, { leading: true });
 
+  handleLoadPending = () => {
+    this.props.dispatch(loadPending());
+  };
+
   handleScrollToTop = debounce(() => {
     this.props.dispatch(scrollTopNotifications(true));
   }, 100);
@@ -170,7 +177,7 @@ export default class Notifications extends React.PureComponent {
   }
 
   render () {
-    const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore, showFilterBar } = this.props;
+    const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore, numPending, 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." />;
 
@@ -212,8 +219,10 @@ export default class Notifications extends React.PureComponent {
         isLoading={isLoading}
         showLoading={isLoading && notifications.size === 0}
         hasMore={hasMore}
+        numPending={numPending}
         emptyMessage={emptyMessage}
         onLoadMore={this.handleLoadOlder}
+        onLoadPending={this.handleLoadPending}
         onScrollToTop={this.handleScrollToTop}
         onScroll={this.handleScroll}
         shouldUpdateScroll={shouldUpdateScroll}

app/javascript/flavours/glitch/features/ui/containers/status_list_container.js

@@ -1,6 +1,6 @@
 import { connect } from 'react-redux';
 import StatusList from 'flavours/glitch/components/status_list';
-import { scrollTopTimeline } from 'flavours/glitch/actions/timelines';
+import { scrollTopTimeline, loadPending } from 'flavours/glitch/actions/timelines';
 import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
 import { createSelector } from 'reselect';
 import { debounce } from 'lodash';
@@ -62,6 +62,7 @@ const makeMapStateToProps = () => {
     isLoading: state.getIn(['timelines', timelineId, 'isLoading'], true),
     isPartial: state.getIn(['timelines', timelineId, 'isPartial'], false),
     hasMore:   state.getIn(['timelines', timelineId, 'hasMore']),
+    numPending: state.getIn(['timelines', timelineId, 'pendingItems'], ImmutableList()).size,
   });
 
   return mapStateToProps;
@@ -77,6 +78,8 @@ const mapDispatchToProps = (dispatch, { timelineId }) => ({
     dispatch(scrollTopTimeline(timelineId, false));
   }, 100),
 
+  onLoadPending: () => dispatch(loadPending(timelineId)),
+
 });
 
 export default connect(makeMapStateToProps, mapDispatchToProps)(StatusList);

app/javascript/flavours/glitch/reducers/notifications.js

@@ -9,6 +9,7 @@ import {
   NOTIFICATIONS_FILTER_SET,
   NOTIFICATIONS_CLEAR,
   NOTIFICATIONS_SCROLL_TOP,
+  NOTIFICATIONS_LOAD_PENDING,
   NOTIFICATIONS_DELETE_MARKED_REQUEST,
   NOTIFICATIONS_DELETE_MARKED_SUCCESS,
   NOTIFICATION_MARK_FOR_DELETE,
@@ -25,6 +26,7 @@ import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
 import compareId from 'flavours/glitch/util/compare_id';
 
 const initialState = ImmutableMap({
+  pendingItems: ImmutableList(),
   items: ImmutableList(),
   hasMore: true,
   top: false,
@@ -46,7 +48,11 @@ const notificationToMap = (state, notification) => ImmutableMap({
   status: notification.status ? notification.status.id : null,
 });
 
-const normalizeNotification = (state, notification) => {
+const normalizeNotification = (state, notification, usePendingItems) => {
+  if (usePendingItems) {
+    return state.update('pendingItems', list => list.unshift(notificationToMap(state, notification)));
+  }
+
   const top = !shouldCountUnreadNotifications(state);
 
   if (top) {
@@ -64,7 +70,7 @@ const normalizeNotification = (state, notification) => {
   });
 };
 
-const expandNormalizedNotifications = (state, notifications, next) => {
+const expandNormalizedNotifications = (state, notifications, next, usePendingItems) => {
   const top = !(shouldCountUnreadNotifications(state));
   const lastReadId = state.get('lastReadId');
   let items = ImmutableList();
@@ -75,7 +81,7 @@ const expandNormalizedNotifications = (state, notifications, next) => {
 
   return state.withMutations(mutable => {
     if (!items.isEmpty()) {
-      mutable.update('items', list => {
+      mutable.update(usePendingItems ? 'pendingItems' : 'items', list => {
         const lastIndex = 1 + list.findLastIndex(
           item => item !== null && (compareId(item.get('id'), items.last().get('id')) > 0 || item.get('id') === items.last().get('id'))
         );
@@ -105,7 +111,8 @@ const expandNormalizedNotifications = (state, notifications, next) => {
 };
 
 const filterNotifications = (state, relationship) => {
-  return state.update('items', list => list.filterNot(item => item !== null && item.get('account') === relationship.id));
+  const helper = list => list.filterNot(item => item !== null && item.get('account') === relationship.id);
+  return state.update('items', helper).update('pendingItems', helper);
 };
 
 const clearUnread = (state) => {
@@ -131,7 +138,8 @@ const deleteByStatus = (state, statusId) => {
     const deletedUnread = state.get('items').filter(item => item !== null && item.get('status') === statusId && compareId(item.get('id'), lastReadId) > 0);
     state = state.update('unread', unread => unread - deletedUnread.size);
   }
-  return state.update('items', list => list.filterNot(item => item !== null && item.get('status') === statusId));
+  const helper = list => list.filterNot(item => item !== null && item.get('status') === statusId);
+  return state.update('items', helper).update('pendingItems', helper);
 };
 
 const markForDelete = (state, notificationId, yes) => {
@@ -192,6 +200,8 @@ export default function notifications(state = initialState, action) {
     return state.update('mounted', count => count - 1);
   case NOTIFICATIONS_SET_VISIBILITY:
     return updateVisibility(state, action.visibility);
+  case NOTIFICATIONS_LOAD_PENDING:
+    return state.update('items', list => state.get('pendingItems').concat(list.take(40))).set('pendingItems', ImmutableList()).set('unread', 0);
   case NOTIFICATIONS_EXPAND_REQUEST:
   case NOTIFICATIONS_DELETE_MARKED_REQUEST:
     return state.set('isLoading', true);
@@ -203,20 +213,20 @@ export default function notifications(state = initialState, action) {
   case NOTIFICATIONS_SCROLL_TOP:
     return updateTop(state, action.top);
   case NOTIFICATIONS_UPDATE:
-    return normalizeNotification(state, action.notification);
+    return normalizeNotification(state, action.notification, action.usePendingItems);
   case NOTIFICATIONS_EXPAND_SUCCESS:
-    return expandNormalizedNotifications(state, action.notifications, action.next);
+    return expandNormalizedNotifications(state, action.notifications, action.next, action.usePendingItems);
   case ACCOUNT_BLOCK_SUCCESS:
     return filterNotifications(state, action.relationship);
   case ACCOUNT_MUTE_SUCCESS:
     return action.relationship.muting_notifications ? filterNotifications(state, action.relationship) : state;
   case NOTIFICATIONS_CLEAR:
-    return state.set('items', ImmutableList()).set('hasMore', false);
+    return state.set('items', ImmutableList()).set('pendingItems', ImmutableList()).set('hasMore', false);
   case TIMELINE_DELETE:
     return deleteByStatus(state, action.id);
   case TIMELINE_DISCONNECT:
     return action.timeline === 'home' ?
-      state.update('items', items => items.first() ? items.unshift(null) : items) :
+      state.update(action.usePendingItems ? 'pendingItems' : 'items', items => items.first() ? items.unshift(null) : items) :
       state;
 
   case NOTIFICATION_MARK_FOR_DELETE:

app/javascript/flavours/glitch/reducers/timelines.js

@@ -8,6 +8,7 @@ import {
   TIMELINE_SCROLL_TOP,
   TIMELINE_CONNECT,
   TIMELINE_DISCONNECT,
+  TIMELINE_LOAD_PENDING,
 } from 'flavours/glitch/actions/timelines';
 import {
   ACCOUNT_BLOCK_SUCCESS,
@@ -25,10 +26,11 @@ const initialTimeline = ImmutableMap({
   top: true,
   isLoading: false,
   hasMore: true,
+  pendingItems: ImmutableList(),
   items: ImmutableList(),
 });
 
-const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, isLoadingRecent) => {
+const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, isLoadingRecent, usePendingItems) => {
   return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
     mMap.set('isLoading', false);
     mMap.set('isPartial', isPartial);
@@ -38,7 +40,7 @@ const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, is
     if (timeline.endsWith(':pinned')) {
       mMap.set('items', statuses.map(status => status.get('id')));
     } else if (!statuses.isEmpty()) {
-      mMap.update('items', ImmutableList(), oldIds => {
+      mMap.update(usePendingItems ? 'pendingItems' : 'items', ImmutableList(), oldIds => {
         const newIds = statuses.map(status => status.get('id'));
         const lastIndex = oldIds.findLastIndex(id => id !== null && compareId(id, newIds.last()) >= 0) + 1;
         const firstIndex = oldIds.take(lastIndex).findLastIndex(id => id !== null && compareId(id, newIds.first()) > 0);
@@ -56,7 +58,15 @@ const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, is
   }));
 };
 
-const updateTimeline = (state, timeline, status) => {
+const updateTimeline = (state, timeline, status, usePendingItems) => {
+  if (usePendingItems) {
+    if (state.getIn([timeline, 'pendingItems'], ImmutableList()).includes(status.get('id')) || state.getIn([timeline, 'items'], ImmutableList()).includes(status.get('id'))) {
+      return state;
+    }
+
+    return state.update(timeline, initialTimeline, map => map.update('pendingItems', list => list.unshift(status.get('id'))));
+  }
+
   const top        = state.getIn([timeline, 'top']);
   const ids        = state.getIn([timeline, 'items'], ImmutableList());
   const includesId = ids.includes(status.get('id'));
@@ -77,8 +87,10 @@ const updateTimeline = (state, timeline, status) => {
 
 const deleteStatus = (state, id, accountId, references, exclude_account = null) => {
   state.keySeq().forEach(timeline => {
-    if (exclude_account === null || (timeline !== `account:${exclude_account}` && !timeline.startsWith(`account:${exclude_account}:`)))
+    if (exclude_account === null || (timeline !== `account:${exclude_account}` && !timeline.startsWith(`account:${exclude_account}:`))) {
-      state = state.updateIn([timeline, 'items'], list => list.filterNot(item => item === id));
+      const helper = list => list.filterNot(item => item === id);
+      state = state.updateIn([timeline, 'items'], helper).updateIn([timeline, 'pendingItems'], helper);
+    }
   });
 
   // Remove reblogs of deleted status
@@ -108,11 +120,10 @@ const filterTimelines = (state, relationship, statuses) => {
   return state;
 };
 
-const filterTimeline = (timeline, state, relationship, statuses) =>
+const filterTimeline = (timeline, state, relationship, statuses) => {
-  state.updateIn([timeline, 'items'], ImmutableList(), list =>
+  const helper = list => list.filterNot(statusId => statuses.getIn([statusId, 'account']) === relationship.id);
-    list.filterNot(statusId =>
+  return state.updateIn([timeline, 'items'], ImmutableList(), helper).updateIn([timeline, 'pendingItems'], ImmutableList(), helper);
-      statuses.getIn([statusId, 'account']) === relationship.id
+};
-    ));
 
 const updateTop = (state, timeline, top) => {
   return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
@@ -123,14 +134,17 @@ const updateTop = (state, timeline, top) => {
 
 export default function timelines(state = initialState, action) {
   switch(action.type) {
+  case TIMELINE_LOAD_PENDING:
+    return state.update(action.timeline, initialTimeline, map =>
+      map.update('items', list => map.get('pendingItems').concat(list.take(40))).set('pendingItems', ImmutableList()).set('unread', 0));
   case TIMELINE_EXPAND_REQUEST:
     return state.update(action.timeline, initialTimeline, map => map.set('isLoading', true));
   case TIMELINE_EXPAND_FAIL:
     return state.update(action.timeline, initialTimeline, map => map.set('isLoading', false));
   case TIMELINE_EXPAND_SUCCESS:
-    return expandNormalizedTimeline(state, action.timeline, fromJS(action.statuses), action.next, action.partial, action.isLoadingRecent);
+    return expandNormalizedTimeline(state, action.timeline, fromJS(action.statuses), action.next, action.partial, action.isLoadingRecent, action.usePendingItems);
   case TIMELINE_UPDATE:
-    return updateTimeline(state, action.timeline, fromJS(action.status));
+    return updateTimeline(state, action.timeline, fromJS(action.status), action.usePendingItems);
   case TIMELINE_DELETE:
     return deleteStatus(state, action.id, action.accountId, action.references, action.reblogOf);
   case TIMELINE_CLEAR:
@@ -148,7 +162,7 @@ export default function timelines(state = initialState, action) {
     return state.update(
       action.timeline,
       initialTimeline,
-      map => map.set('online', false).update('items', items => items.first() ? items.unshift(null) : items)
+      map => map.set('online', false).update(action.usePendingItems ? 'pendingItems' : 'items', items => items.first() ? items.unshift(null) : items)
     );
   default:
     return state;

app/javascript/flavours/glitch/util/compare_id.js

@@ -2,9 +2,10 @@ export default function compareId(id1, id2) {
   if (id1 === id2) {
     return 0;
   }
+
   if (id1.length === id2.length) {
     return id1 > id2 ? 1 : -1;
   } else {
     return id1.length > id2.length ? 1 : -1;
   }
-}
+};

app/javascript/flavours/glitch/util/initial_state.js

@@ -30,5 +30,6 @@ export const isStaff = getMeta('is_staff');
 export const defaultContentType = getMeta('default_content_type');
 export const forceSingleColumn = getMeta('advanced_layout') === false;
 export const useBlurhash = getMeta('use_blurhash');
+export const usePendingItems = getMeta('use_pending_items');
 
 export default initialState;