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_CLEAR,
NOTIFICATIONS_SCROLL_TOP,
} from '../actions/notifications';
import {
ACCOUNT_BLOCK_SUCCESS,
ACCOUNT_MUTE_SUCCESS,
} from '../actions/accounts';
import { TIMELINE_DELETE, TIMELINE_DISCONNECT } from '../actions/timelines';
import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
const initialState = ImmutableMap({
items: ImmutableList(),
hasMore: true,
top: true,
unread: 0,
isLoading: false,
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});
const notificationToMap = notification => ImmutableMap({
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id: notification.id,
type: notification.type,
account: notification.account.id,
status: notification.status ? notification.status.id : null,
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});
const normalizeNotification = (state, notification) => {
const top = state.get('top');
if (!top) {
state = state.update('unread', unread => unread + 1);
}
return state.update('items', list => {
if (top && list.size > 40) {
list = list.take(20);
}
return list.unshift(notificationToMap(notification));
});
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};
const newer = (m, n) => {
const mId = m.get('id');
const nId = n.get('id');
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return mId.length === nId.length ? mId > nId : mId.length > nId.length;
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};
const expandNormalizedNotifications = (state, notifications, next) => {
let items = ImmutableList();
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notifications.forEach((n, i) => {
items = items.set(i, notificationToMap(n));
});
return state.withMutations(mutable => {
if (!items.isEmpty()) {
mutable.update('items', list => {
const lastIndex = 1 + list.findLastIndex(
item => item !== null && (newer(item, items.last()) || item.get('id') === items.last().get('id'))
);
const firstIndex = 1 + list.take(lastIndex).findLastIndex(
item => item !== null && newer(item, items.first())
);
return list.take(firstIndex).concat(items, list.skip(lastIndex));
});
}
if (!next) {
mutable.set('hasMore', true);
}
mutable.set('isLoading', false);
});
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};
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const filterNotifications = (state, relationship) => {
return state.update('items', list => list.filterNot(item => item.get('account') === relationship.id));
};
const updateTop = (state, top) => {
if (top) {
state = state.set('unread', 0);
}
return state.set('top', top);
};
const deleteByStatus = (state, statusId) => {
return state.update('items', list => list.filterNot(item => item.get('status') === statusId));
};
export default function notifications(state = initialState, action) {
switch(action.type) {
case NOTIFICATIONS_EXPAND_REQUEST:
return state.set('isLoading', true);
case NOTIFICATIONS_EXPAND_FAIL:
return state.set('isLoading', false);
case NOTIFICATIONS_SCROLL_TOP:
return updateTop(state, action.top);
case NOTIFICATIONS_UPDATE:
return normalizeNotification(state, action.notification);
case NOTIFICATIONS_EXPAND_SUCCESS:
return expandNormalizedNotifications(state, action.notifications, action.next);
case ACCOUNT_BLOCK_SUCCESS:
case ACCOUNT_MUTE_SUCCESS:
return filterNotifications(state, action.relationship);
case NOTIFICATIONS_CLEAR:
return state.set('items', ImmutableList()).set('hasMore', false);
case TIMELINE_DELETE:
return deleteByStatus(state, action.id);
case TIMELINE_DISCONNECT:
return action.timeline === 'home' ?
state.update('items', items => items.first() ? items.unshift(null) : items) :
state;
default:
return state;
}
};