Method requestSubscription

packages/service-worker/src/push.ts:227–251

* Subscribes to Web Push Notifications, * after requesting and receiving user permission. * * @param options An object containing the `serverPublicKey` string. * @returns A Promise that resolves to the new subscription object.

(options: {serverPublicKey: string})

   * @returns A Promise that resolves to the new subscription object.
   */
  requestSubscription(options: {serverPublicKey: string}): Promise<PushSubscription> {
    if (!this.sw.isEnabled || this.pushManager === null) {
      return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));
    }
    const pushOptions: PushSubscriptionOptionsInit = {userVisibleOnly: true};
    let key = this.decodeBase64(options.serverPublicKey.replace(/_/g, '/').replace(/-/g, '+'));
    let applicationServerKey = new Uint8Array(new ArrayBuffer(key.length));
    for (let i = 0; i < key.length; i++) {
      applicationServerKey[i] = key.charCodeAt(i);
    }
    pushOptions.applicationServerKey = applicationServerKey;

    return new Promise((resolve, reject) => {
      this.pushManager!.pipe(
        switchMap((pm) => pm.subscribe(pushOptions)),
        take(1),
      ).subscribe({
        next: (sub) => {
          this.subscriptionChanges.next(sub);
          resolve(sub);
        },
        error: reject,
      });
    });
  }

  /**
   * Unsubscribes from Service Worker push notifications.