| 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(); |
| } |
| else if (this.retriesSubscription.closed) { |
| return super.complete(); |
| } |
| this._unsubscribeAndRecycle(); |
| this.notifications.next(); |
| } |
| } |
| _unsubscribe() { |
| const { notifications, retriesSubscription } = this; |
| if (notifications) { |
| notifications.unsubscribe(); |
| this.notifications = null; |
| } |
| if (retriesSubscription) { |
| retriesSubscription.unsubscribe(); |
| this.retriesSubscription = null; |
| } |
| this.retries = null; |
| } |
| _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 |