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- import { Subject } from '../Subject';
- import { tryCatch } from '../util/tryCatch';
- import { errorObject } from '../util/errorObject';
- import { OuterSubscriber } from '../OuterSubscriber';
- import { subscribeToResult } from '../util/subscribeToResult';
- /**
- * Returns an Observable that mirrors the source Observable with the exception of a `complete`. If the source
- * Observable calls `complete`, this method will emit to the Observable returned from `notifier`. If that Observable
- * calls `complete` or `error`, then this method will call `complete` or `error` on the child subscription. Otherwise
- * this method will resubscribe to the source Observable.
- *
- * <img src="./img/repeatWhen.png" width="100%">
- *
- * @param {function(notifications: Observable): Observable} notifier - Receives an Observable of notifications with
- * which a user can `complete` or `error`, aborting the repetition.
- * @return {Observable} The source Observable modified with repeat logic.
- * @method repeatWhen
- * @owner Observable
- */
- export function repeatWhen(notifier) {
- return (source) => source.lift(new RepeatWhenOperator(notifier));
- }
- class RepeatWhenOperator {
- constructor(notifier) {
- this.notifier = notifier;
- }
- call(subscriber, source) {
- return source.subscribe(new RepeatWhenSubscriber(subscriber, this.notifier, source));
- }
- }
- /**
- * We need this JSDoc comment for affecting ESDoc.
- * @ignore
- * @extends {Ignored}
- */
- class RepeatWhenSubscriber extends OuterSubscriber {
- constructor(destination, notifier, source) {
- super(destination);
- this.notifier = notifier;
- this.source = source;
- this.sourceIsBeingSubscribedTo = true;
- }
- notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
- this.sourceIsBeingSubscribedTo = true;
- this.source.subscribe(this);
- }
- notifyComplete(innerSub) {
- if (this.sourceIsBeingSubscribedTo === false) {
- return super.complete();
- }
- }
- complete() {
- this.sourceIsBeingSubscribedTo = false;
- if (!this.isStopped) {
- if (!this.retries) {
- this.subscribeToRetries();
- }
- if (!this.retriesSubscription || this.retriesSubscription.closed) {
- return super.complete();
- }
- this._unsubscribeAndRecycle();
- this.notifications.next();
- }
- }
- /** @deprecated internal use only */ _unsubscribe() {
- const { notifications, retriesSubscription } = this;
- if (notifications) {
- notifications.unsubscribe();
- this.notifications = null;
- }
- if (retriesSubscription) {
- retriesSubscription.unsubscribe();
- this.retriesSubscription = null;
- }
- this.retries = null;
- }
- /** @deprecated internal use only */ _unsubscribeAndRecycle() {
- const { notifications, retries, retriesSubscription } = this;
- this.notifications = null;
- this.retries = null;
- this.retriesSubscription = null;
- super._unsubscribeAndRecycle();
- this.notifications = notifications;
- this.retries = retries;
- this.retriesSubscription = retriesSubscription;
- return this;
- }
- subscribeToRetries() {
- this.notifications = new Subject();
- const retries = tryCatch(this.notifier)(this.notifications);
- if (retries === errorObject) {
- return super.complete();
- }
- this.retries = retries;
- this.retriesSubscription = subscribeToResult(this, retries);
- }
- }
- //# sourceMappingURL=repeatWhen.js.map
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