app/javascript/mastodon/reducers/timelines.js

   1 import {
   2   TIMELINE_UPDATE,
   3   TIMELINE_DELETE,
   4   TIMELINE_CLEAR,
   5   TIMELINE_EXPAND_SUCCESS,
   6   TIMELINE_EXPAND_REQUEST,
   7   TIMELINE_EXPAND_FAIL,
   8   TIMELINE_SCROLL_TOP,
   9   TIMELINE_CONNECT,
  10   TIMELINE_DISCONNECT,
  11   TIMELINE_LOAD_PENDING,
  12 } from '../actions/timelines';
  13 import {
  14   ACCOUNT_BLOCK_SUCCESS,
  15   ACCOUNT_MUTE_SUCCESS,
  16   ACCOUNT_UNFOLLOW_SUCCESS,
  17 } from '../actions/accounts';
  18 import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
  19 import compareId from '../compare_id';
  20
  21 const initialState = ImmutableMap();
  22
  23 const initialTimeline = ImmutableMap({
  24   unread: 0,
  25   online: false,
  26   top: true,
  27   isLoading: false,
  28   hasMore: true,
  29   pendingItems: ImmutableList(),
  30   items: ImmutableList(),
  31 });
  32
  33 const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, isLoadingRecent, usePendingItems) => {
  34   return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
  35     mMap.set('isLoading', false);
  36     mMap.set('isPartial', isPartial);
  37
  38     if (!next && !isLoadingRecent) mMap.set('hasMore', false);
  39
  40     if (timeline.endsWith(':pinned')) {
  41       mMap.set('items', statuses.map(status => status.get('id')));
  42     } else if (!statuses.isEmpty()) {
  43       usePendingItems = isLoadingRecent && (usePendingItems || !mMap.get('top') || !mMap.get('pendingItems').isEmpty());
  44       mMap.update(usePendingItems ? 'pendingItems' : 'items', ImmutableList(), oldIds => {
  45         const newIds = statuses.map(status => status.get('id'));
  46
  47         const lastIndex = oldIds.findLastIndex(id => id !== null && compareId(id, newIds.last()) >= 0) + 1;
  48         const firstIndex = oldIds.take(lastIndex).findLastIndex(id => id !== null && compareId(id, newIds.first()) > 0);
  49
  50         if (firstIndex < 0) {
  51           return (isPartial ? newIds.unshift(null) : newIds).concat(oldIds.skip(lastIndex));
  52         }
  53
  54         return oldIds.take(firstIndex + 1).concat(
  55           isPartial && oldIds.get(firstIndex) !== null ? newIds.unshift(null) : newIds,
  56           oldIds.skip(lastIndex)
  57         );
  58       });
  59     }
  60   }));
  61 };
  62
  63 const updateTimeline = (state, timeline, status, usePendingItems) => {
  64   const top = state.getIn([timeline, 'top']);
  65
  66   if (usePendingItems || !top || !state.getIn([timeline, 'pendingItems']).isEmpty()) {
  67     if (state.getIn([timeline, 'pendingItems'], ImmutableList()).includes(status.get('id')) || state.getIn([timeline, 'items'], ImmutableList()).includes(status.get('id'))) {
  68       return state;
  69     }
  70
  71     return state.update(timeline, initialTimeline, map => map.update('pendingItems', list => list.unshift(status.get('id'))).update('unread', unread => unread + 1));
  72   }
  73
  74   const ids        = state.getIn([timeline, 'items'], ImmutableList());
  75   const includesId = ids.includes(status.get('id'));
  76   const unread     = state.getIn([timeline, 'unread'], 0);
  77
  78   if (includesId) {
  79     return state;
  80   }
  81
  82   let newIds = ids;
  83
  84   return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
  85     if (!top) mMap.set('unread', unread + 1);
  86     if (top && ids.size > 40) newIds = newIds.take(20);
  87     mMap.set('items', newIds.unshift(status.get('id')));
  88   }));
  89 };
  90
  91 const deleteStatus = (state, id, accountId, references, exclude_account = null) => {
  92   state.keySeq().forEach(timeline => {
  93     if (exclude_account === null || (timeline !== `account:${exclude_account}` && !timeline.startsWith(`account:${exclude_account}:`))) {
  94       const helper = list => list.filterNot(item => item === id);
  95       state = state.updateIn([timeline, 'items'], helper).updateIn([timeline, 'pendingItems'], helper);
  96     }
  97   });
  98
  99   // Remove reblogs of deleted status
 100   references.forEach(ref => {
 101     state = deleteStatus(state, ref[0], ref[1], [], exclude_account);
 102   });
 103
 104   return state;
 105 };
 106
 107 const clearTimeline = (state, timeline) => {
 108   return state.set(timeline, initialTimeline);
 109 };
 110
 111 const filterTimelines = (state, relationship, statuses) => {
 112   let references;
 113
 114   statuses.forEach(status => {
 115     if (status.get('account') !== relationship.id) {
 116       return;
 117     }
 118
 119     references = statuses.filter(item => item.get('reblog') === status.get('id')).map(item => [item.get('id'), item.get('account')]);
 120     state      = deleteStatus(state, status.get('id'), status.get('account'), references, relationship.id);
 121   });
 122
 123   return state;
 124 };
 125
 126 const filterTimeline = (timeline, state, relationship, statuses) => {
 127   const helper = list => list.filterNot(statusId => statuses.getIn([statusId, 'account']) === relationship.id);
 128   return state.updateIn([timeline, 'items'], ImmutableList(), helper).updateIn([timeline, 'pendingItems'], ImmutableList(), helper);
 129 };
 130
 131 const updateTop = (state, timeline, top) => {
 132   return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
 133     if (top) mMap.set('unread', mMap.get('pendingItems').size);
 134     mMap.set('top', top);
 135   }));
 136 };
 137
 138 export default function timelines(state = initialState, action) {
 139   switch(action.type) {
 140   case TIMELINE_LOAD_PENDING:
 141     return state.update(action.timeline, initialTimeline, map =>
 142       map.update('items', list => map.get('pendingItems').concat(list.take(40))).set('pendingItems', ImmutableList()).set('unread', 0));
 143   case TIMELINE_EXPAND_REQUEST:
 144     return state.update(action.timeline, initialTimeline, map => map.set('isLoading', true));
 145   case TIMELINE_EXPAND_FAIL:
 146     return state.update(action.timeline, initialTimeline, map => map.set('isLoading', false));
 147   case TIMELINE_EXPAND_SUCCESS:
 148     return expandNormalizedTimeline(state, action.timeline, fromJS(action.statuses), action.next, action.partial, action.isLoadingRecent, action.usePendingItems);
 149   case TIMELINE_UPDATE:
 150     return updateTimeline(state, action.timeline, fromJS(action.status), action.usePendingItems);
 151   case TIMELINE_DELETE:
 152     return deleteStatus(state, action.id, action.accountId, action.references, action.reblogOf);
 153   case TIMELINE_CLEAR:
 154     return clearTimeline(state, action.timeline);
 155   case ACCOUNT_BLOCK_SUCCESS:
 156   case ACCOUNT_MUTE_SUCCESS:
 157     return filterTimelines(state, action.relationship, action.statuses);
 158   case ACCOUNT_UNFOLLOW_SUCCESS:
 159     return filterTimeline('home', state, action.relationship, action.statuses);
 160   case TIMELINE_SCROLL_TOP:
 161     return updateTop(state, action.timeline, action.top);
 162   case TIMELINE_CONNECT:
 163     return state.update(action.timeline, initialTimeline, map => map.set('online', true));
 164   case TIMELINE_DISCONNECT:
 165     return state.update(
 166       action.timeline,
 167       initialTimeline,
 168       map => map.set('online', false).update(action.usePendingItems ? 'pendingItems' : 'items', items => items.first() ? items.unshift(null) : items)
 169     );
 170   default:
 171     return state;
 172   }
 173 };