272 lines
10 KiB
TypeScript
272 lines
10 KiB
TypeScript
/// <reference lib="webworker" />
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import IntlMessageFormat from 'intl-messageformat';
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import 'intl-pluralrules';
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import unescape from 'lodash/unescape';
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import type {
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Account as AccountEntity,
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Notification as NotificationEntity,
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Status as StatusEntity,
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} from 'soapbox/types/entities';
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const locales = import.meta.compileTime('./web-push-locales.ts');
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/** Limit before we start grouping device notifications into a single notification. */
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const MAX_NOTIFICATIONS = 5;
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/** Tag for the grouped notification. */
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const GROUP_TAG = 'tag';
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// https://www.devextent.com/create-service-worker-typescript/
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declare const self: ServiceWorkerGlobalScope;
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/** Soapbox notification data from push event. */
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interface NotificationData {
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access_token?: string
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count?: number
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hiddenBody?: string
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hiddenImage?: string
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id?: string
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preferred_locale: string
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url: string
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}
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/** ServiceWorker Notification options with extra fields. */
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interface ExtendedNotificationOptions extends NotificationOptions {
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data: NotificationData
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title: string
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}
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/** Partial clone of ServiceWorker Notification with mutability. */
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interface ClonedNotification {
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actions?: NotificationAction[]
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body?: string
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data: NotificationData
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image?: string
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tag?: string
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title: string
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}
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/** Status entitiy from the API (kind of). */
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// HACK
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interface APIStatus extends Omit<StatusEntity, 'media_attachments'> {
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media_attachments: { preview_url: string }[]
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}
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/** Notification entity from the API (kind of). */
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// HACK
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interface APINotification extends Omit<NotificationEntity, 'account' | 'status'> {
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account: AccountEntity
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status?: APIStatus
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}
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/** Show the actual push notification on the device. */
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const notify = (options: ExtendedNotificationOptions): Promise<void> =>
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self.registration.getNotifications().then(notifications => {
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if (notifications.length >= MAX_NOTIFICATIONS) { // Reached the maximum number of notifications, proceed with grouping
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const group: ClonedNotification = {
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title: formatMessage('notifications.group', options.data.preferred_locale, { count: notifications.length + 1 }),
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body: notifications.map(notification => notification.title).join('\n'),
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tag: GROUP_TAG,
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data: {
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url: (new URL('/notifications', self.location.href)).href,
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count: notifications.length + 1,
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preferred_locale: options.data.preferred_locale,
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},
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};
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notifications.forEach(notification => notification.close());
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return self.registration.showNotification(group.title, group);
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} else if (notifications.length === 1 && notifications[0].tag === GROUP_TAG) { // Already grouped, proceed with appending the notification to the group
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const group = cloneNotification(notifications[0]);
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const count = (group.data.count || 0) + 1;
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group.title = formatMessage('notifications.group', options.data.preferred_locale, { count });
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group.body = `${options.title}\n${group.body}`;
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group.data = { ...group.data, count };
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return self.registration.showNotification(group.title, group);
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}
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return self.registration.showNotification(options.title, options);
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});
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/** Perform an API request to the backend. */
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const fetchFromApi = (path: string, method: string, accessToken: string): Promise<APINotification> => {
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const url = (new URL(path, self.location.href)).href;
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return fetch(url, {
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headers: {
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'Authorization': `Bearer ${accessToken}`,
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'Content-Type': 'application/json',
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},
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method: method,
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credentials: 'include',
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}).then(res => {
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if (res.ok) {
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return res;
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} else {
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throw new Error(String(res.status));
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}
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}).then(res => res.json());
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};
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/** Create a mutable object that loosely matches the Notification. */
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const cloneNotification = (notification: Notification): ClonedNotification => {
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const clone: any = {};
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let k: string;
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// Object.assign() does not work with notifications
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for (k in notification) {
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clone[k] = (notification as any)[k];
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}
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return clone as ClonedNotification;
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};
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/** Get translated message for the user's locale. */
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const formatMessage = (messageId: string, locale: string, values = {}): string =>
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(new IntlMessageFormat(locales[locale][messageId], locale)).format(values) as string;
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/** Strip HTML for display in a native notification. */
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const htmlToPlainText = (html: string): string =>
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unescape(html.replace(/<br\s*\/?>/g, '\n').replace(/<\/p><[^>]*>/g, '\n\n').replace(/<[^>]*>/g, ''));
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/** ServiceWorker `push` event callback. */
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const handlePush = (event: PushEvent) => {
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if (!event.data) {
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console.error('An empty web push event was received.', { event });
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return;
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}
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const { access_token, notification_id, preferred_locale, title, body, icon } = event.data.json();
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// Placeholder until more information can be loaded
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event.waitUntil(
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fetchFromApi(`/api/v1/notifications/${notification_id}`, 'get', access_token).then(notification => {
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const options: ExtendedNotificationOptions = {
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title: formatMessage(`notification.${notification.type}`, preferred_locale, { name: notification.account.display_name.length > 0 ? notification.account.display_name : notification.account.username }),
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body: notification.status && htmlToPlainText(notification.status.content),
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icon: notification.account.avatar_static,
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timestamp: notification.created_at && Number(new Date(notification.created_at)),
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tag: notification.id,
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image: notification.status?.media_attachments[0]?.preview_url,
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data: { access_token, preferred_locale, id: notification.status ? notification.status.id : notification.account.id, url: notification.status ? `/@${notification.account.acct}/posts/${notification.status.id}` : `/@${notification.account.acct}` },
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};
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if (notification.status?.spoiler_text || notification.status?.sensitive) {
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options.data.hiddenBody = htmlToPlainText(notification.status?.content);
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options.data.hiddenImage = notification.status?.media_attachments[0]?.preview_url;
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if (notification.status?.spoiler_text) {
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options.body = notification.status.spoiler_text;
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}
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options.image = undefined;
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options.actions = [actionExpand(preferred_locale)];
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} else if (notification.type === 'mention') {
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options.actions = [actionReblog(preferred_locale), actionFavourite(preferred_locale)];
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}
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return notify(options);
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}).catch(() => {
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return notify({
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title,
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body,
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icon,
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tag: notification_id,
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timestamp: Number(new Date()),
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data: { access_token, preferred_locale, url: '/notifications' },
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});
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}),
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);
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};
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/** Native action to open a status on the device. */
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const actionExpand = (preferred_locale: string) => ({
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action: 'expand',
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icon: `/${require('../../assets/images/web-push/web-push-icon_expand.png')}`,
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title: formatMessage('status.show_more', preferred_locale),
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});
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/** Native action to repost status. */
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const actionReblog = (preferred_locale: string) => ({
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action: 'reblog',
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icon: `/${require('../../assets/images/web-push/web-push-icon_reblog.png')}`,
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title: formatMessage('status.reblog', preferred_locale),
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});
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/** Native action to like status. */
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const actionFavourite = (preferred_locale: string) => ({
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action: 'favourite',
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icon: `/${require('../../assets/images/web-push/web-push-icon_favourite.png')}`,
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title: formatMessage('status.favourite', preferred_locale),
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});
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/** Get the active tab if possible, or any open tab. */
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const findBestClient = (clients: readonly WindowClient[]): WindowClient => {
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const focusedClient = clients.find(client => client.focused);
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const visibleClient = clients.find(client => client.visibilityState === 'visible');
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return focusedClient || visibleClient || clients[0];
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};
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/** Update a notification with CW to display the full status. */
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const expandNotification = (notification: Notification) => {
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const newNotification = cloneNotification(notification);
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newNotification.body = newNotification.data.hiddenBody;
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newNotification.image = newNotification.data.hiddenImage;
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newNotification.actions = [actionReblog(notification.data.preferred_locale), actionFavourite(notification.data.preferred_locale)];
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return self.registration.showNotification(newNotification.title, newNotification);
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};
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/** Update the native notification, but delete the action (because it was performed). */
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const removeActionFromNotification = (notification: Notification, action: string) => {
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const newNotification = cloneNotification(notification);
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newNotification.actions = newNotification.actions?.filter(item => item.action !== action);
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return self.registration.showNotification(newNotification.title, newNotification);
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};
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/** Open a URL on the device. */
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const openUrl = (url: string) =>
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self.clients.matchAll({ type: 'window' }).then(clientList => {
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if (clientList.length === 0) {
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return self.clients.openWindow(url);
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} else {
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const client = findBestClient(clientList);
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return client.navigate(url).then(client => client?.focus());
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}
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});
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/** Callback when a native notification is clicked/touched on the device. */
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const handleNotificationClick = (event: NotificationEvent) => {
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const reactToNotificationClick = new Promise((resolve, reject) => {
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if (event.action) {
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if (event.action === 'expand') {
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resolve(expandNotification(event.notification));
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} else if (event.action === 'reblog') {
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const { data } = event.notification;
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resolve(fetchFromApi(`/api/v1/statuses/${data.id}/reblog`, 'post', data.access_token).then(() => removeActionFromNotification(event.notification, 'reblog')));
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} else if (event.action === 'favourite') {
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const { data } = event.notification;
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resolve(fetchFromApi(`/api/v1/statuses/${data.id}/favourite`, 'post', data.access_token).then(() => removeActionFromNotification(event.notification, 'favourite')));
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} else {
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reject(`Unknown action: ${event.action}`);
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}
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} else {
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event.notification.close();
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resolve(openUrl(event.notification.data.url));
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}
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});
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event.waitUntil(reactToNotificationClick);
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};
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// ServiceWorker event listeners
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self.addEventListener('push', handlePush);
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self.addEventListener('notificationclick', handleNotificationClick);
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