Change timelines to add new items to pending items when scrolled down (#11867)
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				@ -35,12 +35,12 @@ const notificationToMap = notification => ImmutableMap({
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});
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const normalizeNotification = (state, notification, usePendingItems) => {
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  if (usePendingItems) {
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  const top = state.get('top');
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  if (usePendingItems || !top || !state.get('pendingItems').isEmpty()) {
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    return state.update('pendingItems', list => list.unshift(notificationToMap(notification))).update('unread', unread => unread + 1);
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  }
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  const top = state.get('top');
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  if (!top) {
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    state = state.update('unread', unread => unread + 1);
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  }
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@ -63,6 +63,8 @@ const expandNormalizedNotifications = (state, notifications, next, usePendingIte
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  return state.withMutations(mutable => {
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    if (!items.isEmpty()) {
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      usePendingItems = usePendingItems || !mutable.get('top') || !mutable.get('pendingItems').isEmpty();
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      mutable.update(usePendingItems ? 'pendingItems' : 'items', list => {
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        const lastIndex = 1 + list.findLastIndex(
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          item => item !== null && (compareId(item.get('id'), items.last().get('id')) > 0 || item.get('id') === items.last().get('id'))
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@ -40,6 +40,7 @@ const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, is
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    if (timeline.endsWith(':pinned')) {
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      mMap.set('items', statuses.map(status => status.get('id')));
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    } else if (!statuses.isEmpty()) {
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      usePendingItems = usePendingItems || !mMap.get('top') || !mMap.get('pendingItems').isEmpty();
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      mMap.update(usePendingItems ? 'pendingItems' : 'items', ImmutableList(), oldIds => {
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        const newIds = statuses.map(status => status.get('id'));
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@ -60,7 +61,9 @@ const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, is
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};
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const updateTimeline = (state, timeline, status, usePendingItems) => {
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  if (usePendingItems) {
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  const top = state.getIn([timeline, 'top']);
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  if (usePendingItems || !top || !state.getIn([timeline, 'pendingItems']).isEmpty()) {
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    if (state.getIn([timeline, 'pendingItems'], ImmutableList()).includes(status.get('id')) || state.getIn([timeline, 'items'], ImmutableList()).includes(status.get('id'))) {
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      return state;
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    }
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@ -68,7 +71,6 @@ const updateTimeline = (state, timeline, status, usePendingItems) => {
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    return state.update(timeline, initialTimeline, map => map.update('pendingItems', list => list.unshift(status.get('id'))).update('unread', unread => unread + 1));
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  }
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  const top        = state.getIn([timeline, 'top']);
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  const ids        = state.getIn([timeline, 'items'], ImmutableList());
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  const includesId = ids.includes(status.get('id'));
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  const unread     = state.getIn([timeline, 'unread'], 0);
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