1 files changed, 318 insertions, 0 deletions
diff --git a/app/javascript/flavours/glitch/reducers/notifications.js b/app/javascript/flavours/glitch/reducers/notifications.js
new file mode 100644
index 000000000..859a8b3a1
--- /dev/null
+++ b/app/javascript/flavours/glitch/reducers/notifications.js
@@ -0,0 +1,318 @@
+import {
+  NOTIFICATIONS_MOUNT,
+  NOTIFICATIONS_UNMOUNT,
+  NOTIFICATIONS_SET_VISIBILITY,
+  NOTIFICATIONS_UPDATE,
+  NOTIFICATIONS_EXPAND_SUCCESS,
+  NOTIFICATIONS_EXPAND_REQUEST,
+  NOTIFICATIONS_EXPAND_FAIL,
+  NOTIFICATIONS_FILTER_SET,
+  NOTIFICATIONS_CLEAR,
+  NOTIFICATIONS_SCROLL_TOP,
+  NOTIFICATIONS_LOAD_PENDING,
+  NOTIFICATIONS_DELETE_MARKED_REQUEST,
+  NOTIFICATIONS_DELETE_MARKED_SUCCESS,
+  NOTIFICATION_MARK_FOR_DELETE,
+  NOTIFICATIONS_DELETE_MARKED_FAIL,
+  NOTIFICATIONS_ENTER_CLEARING_MODE,
+  NOTIFICATIONS_MARK_ALL_FOR_DELETE,
+  NOTIFICATIONS_MARK_AS_READ,
+  NOTIFICATIONS_SET_BROWSER_SUPPORT,
+  NOTIFICATIONS_SET_BROWSER_PERMISSION,
+} from 'flavours/glitch/actions/notifications';
+import {
+  ACCOUNT_BLOCK_SUCCESS,
+  ACCOUNT_MUTE_SUCCESS,
+  FOLLOW_REQUEST_AUTHORIZE_SUCCESS,
+  FOLLOW_REQUEST_REJECT_SUCCESS,
+} from 'flavours/glitch/actions/accounts';
+import {
+  MARKERS_FETCH_SUCCESS,
+} from 'flavours/glitch/actions/markers';
+import { DOMAIN_BLOCK_SUCCESS } from 'flavours/glitch/actions/domain_blocks';
+import { TIMELINE_DELETE, TIMELINE_DISCONNECT } from 'flavours/glitch/actions/timelines';
+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,
+  mounted: 0,
+  unread: 0,
+  lastReadId: '0',
+  readMarkerId: '0',
+  isLoading: false,
+  cleaningMode: false,
+  isTabVisible: true,
+  browserSupport: false,
+  browserPermission: 'default',
+  // notification removal mark of new notifs loaded whilst cleaningMode is true.
+  markNewForDelete: false,
+});
+
+const notificationToMap = (state, notification) => ImmutableMap({
+  id: notification.id,
+  type: notification.type,
+  account: notification.account.id,
+  markedForDelete: state.get('markNewForDelete'),
+  status: notification.status ? notification.status.id : null,
+});
+
+const normalizeNotification = (state, notification, usePendingItems) => {
+  const top = state.get('top');
+
+  if (usePendingItems || !state.get('pendingItems').isEmpty()) {
+    return state.update('pendingItems', list => list.unshift(notificationToMap(state, notification))).update('unread', unread => unread + 1);
+  }
+
+  if (shouldCountUnreadNotifications(state)) {
+    state = state.update('unread', unread => unread + 1);
+  } else {
+    state = state.set('lastReadId', notification.id);
+  }
+
+  return state.update('items', list => {
+    if (top && list.size > 40) {
+      list = list.take(20);
+    }
+
+    return list.unshift(notificationToMap(state, notification));
+  });
+};
+
+const expandNormalizedNotifications = (state, notifications, next, isLoadingRecent, usePendingItems) => {
+  const lastReadId = state.get('lastReadId');
+  let items = ImmutableList();
+
+  notifications.forEach((n, i) => {
+    items = items.set(i, notificationToMap(state, n));
+  });
+
+  return state.withMutations(mutable => {
+    if (!items.isEmpty()) {
+      usePendingItems = isLoadingRecent && (usePendingItems || !mutable.get('pendingItems').isEmpty());
+
+      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')),
+        );
+
+        const firstIndex = 1 + list.take(lastIndex).findLastIndex(
+          item => item !== null && compareId(item.get('id'), items.first().get('id')) > 0,
+        );
+
+        return list.take(firstIndex).concat(items, list.skip(lastIndex));
+      });
+    }
+
+    if (!next) {
+      mutable.set('hasMore', false);
+    }
+
+    if (shouldCountUnreadNotifications(state)) {
+      mutable.set('unread', mutable.get('pendingItems').count(item => item !== null) + mutable.get('items').count(item => item && compareId(item.get('id'), lastReadId) > 0));
+    } else {
+      const mostRecent = items.find(item => item !== null);
+      if (mostRecent && compareId(lastReadId, mostRecent.get('id')) < 0) {
+        mutable.set('lastReadId', mostRecent.get('id'));
+      }
+    }
+
+    mutable.set('isLoading', false);
+  });
+};
+
+const filterNotifications = (state, accountIds, type) => {
+  const helper = list => list.filterNot(item => item !== null && accountIds.includes(item.get('account')) && (type === undefined || type === item.get('type')));
+  return state.update('items', helper).update('pendingItems', helper);
+};
+
+const clearUnread = (state) => {
+  state = state.set('unread', state.get('pendingItems').size);
+  const lastNotification = state.get('items').find(item => item !== null);
+  return state.set('lastReadId', lastNotification ? lastNotification.get('id') : '0');
+};
+
+const updateTop = (state, top) => {
+  state = state.set('top', top);
+
+  if (!shouldCountUnreadNotifications(state)) {
+    state = clearUnread(state);
+  }
+
+  return state;
+};
+
+const deleteByStatus = (state, statusId) => {
+  const lastReadId = state.get('lastReadId');
+
+  if (shouldCountUnreadNotifications(state)) {
+    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);
+  }
+
+  const helper = list => list.filterNot(item => item !== null && item.get('status') === statusId);
+  const deletedUnread = state.get('pendingItems').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', helper).update('pendingItems', helper);
+};
+
+const markForDelete = (state, notificationId, yes) => {
+  return state.update('items', list => list.map(item => {
+    if(item.get('id') === notificationId) {
+      return item.set('markedForDelete', yes);
+    } else {
+      return item;
+    }
+  }));
+};
+
+const markAllForDelete = (state, yes) => {
+  return state.update('items', list => list.map(item => {
+    if(yes !== null) {
+      return item.set('markedForDelete', yes);
+    } else {
+      return item.set('markedForDelete', !item.get('markedForDelete'));
+    }
+  }));
+};
+
+const unmarkAllForDelete = (state) => {
+  return state.update('items', list => list.map(item => item.set('markedForDelete', false)));
+};
+
+const deleteMarkedNotifs = (state) => {
+  return state.update('items', list => list.filterNot(item => item.get('markedForDelete')));
+};
+
+const updateMounted = (state) => {
+  state = state.update('mounted', count => count + 1);
+  if (!shouldCountUnreadNotifications(state, state.get('mounted') === 1)) {
+    state = state.set('readMarkerId', state.get('lastReadId'));
+    state = clearUnread(state);
+  }
+  return state;
+};
+
+const updateVisibility = (state, visibility) => {
+  state = state.set('isTabVisible', visibility);
+  if (!shouldCountUnreadNotifications(state)) {
+    state = state.set('readMarkerId', state.get('lastReadId'));
+    state = clearUnread(state);
+  }
+  return state;
+};
+
+const shouldCountUnreadNotifications = (state, ignoreScroll = false) => {
+  const isTabVisible   = state.get('isTabVisible');
+  const isOnTop        = state.get('top');
+  const isMounted      = state.get('mounted') > 0;
+  const lastReadId     = state.get('lastReadId');
+  const lastItem       = state.get('items').findLast(item => item !== null);
+  const lastItemReached = !state.get('hasMore') || lastReadId === '0' || (lastItem && compareId(lastItem.get('id'), lastReadId) <= 0);
+
+  return !(isTabVisible && (ignoreScroll || isOnTop) && isMounted && lastItemReached);
+};
+
+const recountUnread = (state, last_read_id) => {
+  return state.withMutations(mutable => {
+    if (compareId(last_read_id, mutable.get('lastReadId')) > 0) {
+      mutable.set('lastReadId', last_read_id);
+    }
+
+    if (compareId(last_read_id, mutable.get('readMarkerId')) > 0) {
+      mutable.set('readMarkerId', last_read_id);
+    }
+
+    if (state.get('unread') > 0 || shouldCountUnreadNotifications(state)) {
+      mutable.set('unread', mutable.get('pendingItems').count(item => item !== null) + mutable.get('items').count(item => item && compareId(item.get('id'), last_read_id) > 0));
+    }
+  });
+};
+
+export default function notifications(state = initialState, action) {
+  let st;
+
+  switch(action.type) {
+  case MARKERS_FETCH_SUCCESS:
+    return action.markers.notifications ? recountUnread(state, action.markers.notifications.last_read_id) : state;
+  case NOTIFICATIONS_MOUNT:
+    return updateMounted(state);
+  case NOTIFICATIONS_UNMOUNT:
+    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);
+  case NOTIFICATIONS_DELETE_MARKED_FAIL:
+  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:
+    return normalizeNotification(state, action.notification, action.usePendingItems);
+  case NOTIFICATIONS_EXPAND_SUCCESS:
+    return expandNormalizedNotifications(state, action.notifications, action.next, action.isLoadingRecent, action.usePendingItems);
+  case ACCOUNT_BLOCK_SUCCESS:
+    return filterNotifications(state, [action.relationship.id]);
+  case ACCOUNT_MUTE_SUCCESS:
+    return action.relationship.muting_notifications ? filterNotifications(state, [action.relationship.id]) : state;
+  case DOMAIN_BLOCK_SUCCESS:
+    return filterNotifications(state, action.accounts);
+  case FOLLOW_REQUEST_AUTHORIZE_SUCCESS:
+  case FOLLOW_REQUEST_REJECT_SUCCESS:
+    return filterNotifications(state, [action.id], 'follow_request');
+  case ACCOUNT_MUTE_SUCCESS:
+    return action.relationship.muting_notifications ? filterNotifications(state, [action.relationship.id]) : state;
+  case NOTIFICATIONS_CLEAR:
+    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(action.usePendingItems ? 'pendingItems' : 'items', items => items.first() ? items.unshift(null) : items) :
+      state;
+  case NOTIFICATIONS_SET_BROWSER_SUPPORT:
+    return state.set('browserSupport', action.value);
+  case NOTIFICATIONS_SET_BROWSER_PERMISSION:
+    return state.set('browserPermission', action.value);
+
+  case NOTIFICATION_MARK_FOR_DELETE:
+    return markForDelete(state, action.id, action.yes);
+
+  case NOTIFICATIONS_DELETE_MARKED_SUCCESS:
+    return deleteMarkedNotifs(state).set('isLoading', false);
+
+  case NOTIFICATIONS_ENTER_CLEARING_MODE:
+    st = state.set('cleaningMode', action.yes);
+    if (!action.yes) {
+      return unmarkAllForDelete(st).set('markNewForDelete', false);
+    } else {
+      return st;
+    }
+
+  case NOTIFICATIONS_MARK_ALL_FOR_DELETE:
+    st = state;
+    if (action.yes === null) {
+      // Toggle - this is a bit confusing, as it toggles the all-none mode
+      //st = st.set('markNewForDelete', !st.get('markNewForDelete'));
+    } else {
+      st = st.set('markNewForDelete', action.yes);
+    }
+    return markAllForDelete(st, action.yes);
+
+  case NOTIFICATIONS_MARK_AS_READ:
+    const lastNotification = state.get('items').find(item => item !== null);
+    return lastNotification ? recountUnread(state, lastNotification.get('id')) : state;
+
+  default:
+    return state;
+  }
+};