d442b6855f
This service worker is a conceptual derivative of the existing @angular/service-worker maintained at github.com/angular/mobile-toolkit, but has been rewritten to support use across a much wider variety of applications. Entrypoints include: @angular/service-worker: a library for use within Angular client apps to communicate with the service worker. @angular/service-worker/gen: a library for generating ngsw.json files from glob-based SW config files. @angular/service-worker/ngsw-worker.js: the bundled service worker script itself. @angular/service-worker/ngsw-cli.js: a CLI tool for generating ngsw.json files from glob-based SW config files.
82 lines
3.1 KiB
TypeScript
82 lines
3.1 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Observable} from 'rxjs/Observable';
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import {Subject} from 'rxjs/Subject';
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import {merge as obs_merge} from 'rxjs/observable/merge';
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import {map as op_map} from 'rxjs/operator/map';
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import {switchMap as op_switchMap} from 'rxjs/operator/switchMap';
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import {take as op_take} from 'rxjs/operator/take';
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import {toPromise as op_toPromise} from 'rxjs/operator/toPromise';
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import {NgswCommChannel} from './low_level';
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/**
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* Subscribe and listen to push notifications from the Service Worker.
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*
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* @experimental
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*/
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export class SwPush {
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readonly messages: Observable<object>;
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readonly subscription: Observable<PushSubscription|null>;
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private pushManager: Observable<PushManager>;
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private subscriptionChanges: Subject<PushSubscription|null> =
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new Subject<PushSubscription|null>();
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constructor(private sw: NgswCommChannel) {
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this.messages =
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op_map.call(this.sw.eventsOfType('PUSH'), (message: {data: object}) => message.data);
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this.pushManager = <Observable<PushManager>>(op_map.call(
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this.sw.registration,
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(registration: ServiceWorkerRegistration) => { return registration.pushManager; }));
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const workerDrivenSubscriptions = <Observable<PushSubscription|null>>(op_switchMap.call(
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this.pushManager, (pm: PushManager) => pm.getSubscription().then(sub => { return sub; })));
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this.subscription = obs_merge.call(workerDrivenSubscriptions, this.subscriptionChanges);
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}
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requestSubscription(options: {serverPublicKey: string}): Promise<PushSubscription> {
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const pushOptions: PushSubscriptionOptionsInit = {userVisibleOnly: true};
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let key = atob(options.serverPublicKey.replace(/_/g, '/').replace(/-/g, '+'));
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let applicationServerKey = new Uint8Array(new ArrayBuffer(key.length));
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for (let i = 0; i < key.length; i++) {
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applicationServerKey[i] = key.charCodeAt(i);
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}
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pushOptions.applicationServerKey = applicationServerKey;
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const subscribe = <Observable<PushSubscription>>(
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op_switchMap.call(this.pushManager, (pm: PushManager) => pm.subscribe(pushOptions)));
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const subscribeOnce = op_take.call(subscribe, 1);
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return (op_toPromise.call(subscribeOnce) as Promise<PushSubscription>).then(sub => {
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this.subscriptionChanges.next(sub);
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return sub;
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});
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}
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unsubscribe(): Promise<void> {
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const unsubscribe = op_switchMap.call(this.subscription, (sub: PushSubscription | null) => {
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if (sub !== null) {
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return sub.unsubscribe().then(success => {
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if (success) {
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this.subscriptionChanges.next(null);
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return undefined;
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} else {
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throw new Error('Unsubscribe failed!');
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}
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});
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} else {
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throw new Error('Not subscribed to push notifications.');
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}
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});
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const unsubscribeOnce = op_take.call(unsubscribe, 1);
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return op_toPromise.call(unsubscribeOnce) as Promise<void>;
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}
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} |