chinwagsocial/app/javascript/mastodon/reducers/notifications.js

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import {
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NOTIFICATIONS_UPDATE,
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,
} from '../actions/notifications';
import {
ACCOUNT_BLOCK_SUCCESS,
ACCOUNT_MUTE_SUCCESS,
FOLLOW_REQUEST_AUTHORIZE_SUCCESS,
FOLLOW_REQUEST_REJECT_SUCCESS,
} from '../actions/accounts';
import {
MARKERS_FETCH_SUCCESS,
} from '../actions/markers';
import {
APP_FOCUS,
APP_UNFOCUS,
} from '../actions/app';
import { DOMAIN_BLOCK_SUCCESS } from 'mastodon/actions/domain_blocks';
import { TIMELINE_DELETE, TIMELINE_DISCONNECT } from '../actions/timelines';
import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
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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: false,
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});
const notificationToMap = notification => ImmutableMap({
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id: notification.id,
type: notification.type,
account: notification.account.id,
created_at: notification.created_at,
status: notification.status ? notification.status.id : null,
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});
const normalizeNotification = (state, notification, usePendingItems) => {
const top = state.get('top');
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));
});
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};
const expandNormalizedNotifications = (state, notifications, next, isLoadingRecent, usePendingItems) => {
const lastReadId = state.get('lastReadId');
let items = ImmutableList();
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notifications.forEach((n, i) => {
items = items.set(i, notificationToMap(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.update('unread', unread => unread + items.count(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);
});
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};
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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 = 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) => {
const isTabVisible = state.get('isTabVisible');
const isOnTop = state.get('top');
const isMounted = state.get('mounted') > 0;
const lastReadId = state.get('lastReadId');
const lastItemReached = !state.get('hasMore') || lastReadId === '0' || (!state.get('items').isEmpty() && compareId(state.get('items').last().get('id'), lastReadId) <= 0);
return !(isTabVisible && 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 APP_FOCUS:
return updateVisibility(state, true);
case APP_UNFOCUS:
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.set('isLoading', true);
case NOTIFICATIONS_EXPAND_FAIL:
return state.set('isLoading', false);
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 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_MARK_AS_READ:
const lastNotification = state.get('items').find(item => item !== null);
return lastNotification ? recountUnread(state, lastNotification.get('id')) : state;
default:
return state;
}
};