import { fromJS, Map as ImmutableMap, List as ImmutableList } from 'immutable'; import { blockDomainSuccess } from 'mastodon/actions/domain_blocks'; import { authorizeFollowRequestSuccess, blockAccountSuccess, muteAccountSuccess, rejectFollowRequestSuccess, } from '../actions/accounts'; import { focusApp, unfocusApp, } from '../actions/app'; import { MARKERS_FETCH_SUCCESS, } from '../actions/markers'; import { notificationsUpdate, NOTIFICATIONS_EXPAND_SUCCESS, NOTIFICATIONS_EXPAND_REQUEST, NOTIFICATIONS_EXPAND_FAIL, NOTIFICATIONS_FILTER_SET, NOTIFICATIONS_CLEAR, NOTIFICATIONS_SCROLL_TOP, NOTIFICATIONS_LOAD_PENDING, NOTIFICATIONS_MOUNT, NOTIFICATIONS_UNMOUNT, NOTIFICATIONS_MARK_AS_READ, NOTIFICATIONS_SET_BROWSER_SUPPORT, NOTIFICATIONS_SET_BROWSER_PERMISSION, } from '../actions/notifications'; import { TIMELINE_DELETE, TIMELINE_DISCONNECT } from '../actions/timelines'; import { compareId } from '../compare_id'; const initialState = ImmutableMap({ pendingItems: ImmutableList(), items: ImmutableList(), hasMore: true, top: false, mounted: 0, unread: 0, lastReadId: '0', readMarkerId: '0', isTabVisible: true, isLoading: 0, browserSupport: false, browserPermission: 'default', }); const notificationToMap = notification => ImmutableMap({ id: notification.id, type: notification.type, account: notification.account.id, created_at: notification.created_at, status: notification.status ? notification.status.id : null, report: notification.report ? fromJS(notification.report) : null, }); const normalizeNotification = (state, notification, usePendingItems) => { const top = state.get('top'); // Under currently unknown conditions, the client may receive duplicates from the server if (state.get('pendingItems').some((item) => item?.get('id') === notification.id) || state.get('items').some((item) => item?.get('id') === notification.id)) { return state; } if (usePendingItems || !state.get('pendingItems').isEmpty()) { return state.update('pendingItems', list => list.unshift(notificationToMap(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(notification)); }); }; const expandNormalizedNotifications = (state, notifications, next, isLoadingMore, isLoadingRecent, usePendingItems) => { // This method is pretty tricky because: // - existing notifications might be out of order // - the existing notifications may have gaps, most often explicitly noted with a `null` item // - ideally, we don't want it to reorder existing items // - `notifications` may include items that are already included // - this function can be called either to fill in a gap, or load newer items const lastReadId = state.get('lastReadId'); const newItems = ImmutableList(notifications.map(notificationToMap)); return state.withMutations(mutable => { if (!newItems.isEmpty()) { usePendingItems = isLoadingRecent && (usePendingItems || !mutable.get('pendingItems').isEmpty()); mutable.update(usePendingItems ? 'pendingItems' : 'items', oldItems => { // If called to poll *new* notifications, we just need to add them on top without duplicates if (isLoadingRecent) { const idsToCheck = oldItems.map(item => item?.get('id')).toSet(); const insertedItems = newItems.filterNot(item => idsToCheck.includes(item.get('id'))); return insertedItems.concat(oldItems); } // If called to expand more (presumably older than any known to the WebUI), we just have to // add them to the bottom without duplicates if (isLoadingMore) { const idsToCheck = oldItems.map(item => item?.get('id')).toSet(); const insertedItems = newItems.filterNot(item => idsToCheck.includes(item.get('id'))); return oldItems.concat(insertedItems); } // Now this gets tricky, as we don't necessarily know for sure where the gap to fill is, // and some items in the timeline may not be properly ordered. // However, we know that `newItems.last()` is the oldest item that was requested and that // there is no “hole” between `newItems.last()` and `newItems.first()`. // First, find the furthest (if properly sorted, oldest) item in the notifications that is // newer than the oldest fetched one, as it's most likely that it delimits the gap. // Start the gap *after* that item. const lastIndex = oldItems.findLastIndex(item => item !== null && compareId(item.get('id'), newItems.last().get('id')) >= 0) + 1; // Then, try to find the furthest (if properly sorted, oldest) item in the notifications that // is newer than the most recent fetched one, as it delimits a section comprised of only // items older or within `newItems` (or that were deleted from the server, so should be removed // anyway). // Stop the gap *after* that item. const firstIndex = oldItems.take(lastIndex).findLastIndex(item => item !== null && compareId(item.get('id'), newItems.first().get('id')) > 0) + 1; // At this point: // - no `oldItems` after `firstIndex` is newer than any of the `newItems` // - all `oldItems` after `lastIndex` are older than every of the `newItems` // - it is possible for items in the replaced slice to be older than every `newItems` // - it is possible for items before `firstIndex` to be in the `newItems` range // Therefore: // - to avoid losing items, items from the replaced slice that are older than `newItems` // should be added in the back. // - to avoid duplicates, `newItems` should be checked the first `firstIndex` items of // `oldItems` const idsToCheck = oldItems.take(firstIndex).map(item => item?.get('id')).toSet(); const insertedItems = newItems.filterNot(item => idsToCheck.includes(item.get('id'))); const olderItems = oldItems.slice(firstIndex, lastIndex).filter(item => item !== null && compareId(item.get('id'), newItems.last().get('id')) < 0); return oldItems.take(firstIndex).concat( insertedItems, olderItems, oldItems.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 = newItems.find(item => item !== null); if (mostRecent && compareId(lastReadId, mostRecent.get('id')) < 0) { mutable.set('lastReadId', mostRecent.get('id')); } } mutable.update('isLoading', (nbLoading) => nbLoading - 1); }); }; 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 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) { 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 focusApp.type: return updateVisibility(state, true); case unfocusApp.type: return updateVisibility(state, false); 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: return state.update('isLoading', (nbLoading) => nbLoading + 1); case NOTIFICATIONS_EXPAND_FAIL: return state.update('isLoading', (nbLoading) => nbLoading - 1); case NOTIFICATIONS_FILTER_SET: return state.set('items', ImmutableList()).set('pendingItems', ImmutableList()).set('hasMore', true); case NOTIFICATIONS_SCROLL_TOP: return updateTop(state, action.top); case notificationsUpdate.type: return normalizeNotification(state, action.payload.notification, action.payload.usePendingItems); case NOTIFICATIONS_EXPAND_SUCCESS: return expandNormalizedNotifications(state, action.notifications, action.next, action.isLoadingMore, action.isLoadingRecent, action.usePendingItems); case blockAccountSuccess.type: return filterNotifications(state, [action.payload.relationship.id]); case muteAccountSuccess.type: return action.relationship.muting_notifications ? filterNotifications(state, [action.payload.relationship.id]) : state; case blockDomainSuccess.type: return filterNotifications(state, action.payload.accounts); case authorizeFollowRequestSuccess.type: case rejectFollowRequestSuccess.type: return filterNotifications(state, [action.payload.id], 'follow_request'); 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_MARK_AS_READ: const lastNotification = state.get('items').find(item => item !== null); return lastNotification ? recountUnread(state, lastNotification.get('id')) : state; case NOTIFICATIONS_SET_BROWSER_SUPPORT: return state.set('browserSupport', action.value); case NOTIFICATIONS_SET_BROWSER_PERMISSION: return state.set('browserPermission', action.value); default: return state; } }