| import { Subscriber } from '../Subscriber'; |
| import { Observable } from '../Observable'; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| export function delayWhen(delayDurationSelector, subscriptionDelay) { |
| if (subscriptionDelay) { |
| return (source) => new SubscriptionDelayObservable(source, subscriptionDelay) |
| .lift(new DelayWhenOperator(delayDurationSelector)); |
| } |
| return (source) => source.lift(new DelayWhenOperator(delayDurationSelector)); |
| } |
| class DelayWhenOperator { |
| constructor(delayDurationSelector) { |
| this.delayDurationSelector = delayDurationSelector; |
| } |
| call(subscriber, source) { |
| return source.subscribe(new DelayWhenSubscriber(subscriber, this.delayDurationSelector)); |
| } |
| } |
| class DelayWhenSubscriber extends OuterSubscriber { |
| constructor(destination, delayDurationSelector) { |
| super(destination); |
| this.delayDurationSelector = delayDurationSelector; |
| this.completed = false; |
| this.delayNotifierSubscriptions = []; |
| this.index = 0; |
| } |
| notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) { |
| this.destination.next(outerValue); |
| this.removeSubscription(innerSub); |
| this.tryComplete(); |
| } |
| notifyError(error, innerSub) { |
| this._error(error); |
| } |
| notifyComplete(innerSub) { |
| const value = this.removeSubscription(innerSub); |
| if (value) { |
| this.destination.next(value); |
| } |
| this.tryComplete(); |
| } |
| _next(value) { |
| const index = this.index++; |
| try { |
| const delayNotifier = this.delayDurationSelector(value, index); |
| if (delayNotifier) { |
| this.tryDelay(delayNotifier, value); |
| } |
| } |
| catch (err) { |
| this.destination.error(err); |
| } |
| } |
| _complete() { |
| this.completed = true; |
| this.tryComplete(); |
| this.unsubscribe(); |
| } |
| removeSubscription(subscription) { |
| subscription.unsubscribe(); |
| const subscriptionIdx = this.delayNotifierSubscriptions.indexOf(subscription); |
| if (subscriptionIdx !== -1) { |
| this.delayNotifierSubscriptions.splice(subscriptionIdx, 1); |
| } |
| return subscription.outerValue; |
| } |
| tryDelay(delayNotifier, value) { |
| const notifierSubscription = subscribeToResult(this, delayNotifier, value); |
| if (notifierSubscription && !notifierSubscription.closed) { |
| const destination = this.destination; |
| destination.add(notifierSubscription); |
| this.delayNotifierSubscriptions.push(notifierSubscription); |
| } |
| } |
| tryComplete() { |
| if (this.completed && this.delayNotifierSubscriptions.length === 0) { |
| this.destination.complete(); |
| } |
| } |
| } |
| class SubscriptionDelayObservable extends Observable { |
| constructor(source, subscriptionDelay) { |
| super(); |
| this.source = source; |
| this.subscriptionDelay = subscriptionDelay; |
| } |
| _subscribe(subscriber) { |
| this.subscriptionDelay.subscribe(new SubscriptionDelaySubscriber(subscriber, this.source)); |
| } |
| } |
| class SubscriptionDelaySubscriber extends Subscriber { |
| constructor(parent, source) { |
| super(); |
| this.parent = parent; |
| this.source = source; |
| this.sourceSubscribed = false; |
| } |
| _next(unused) { |
| this.subscribeToSource(); |
| } |
| _error(err) { |
| this.unsubscribe(); |
| this.parent.error(err); |
| } |
| _complete() { |
| this.unsubscribe(); |
| this.subscribeToSource(); |
| } |
| subscribeToSource() { |
| if (!this.sourceSubscribed) { |
| this.sourceSubscribed = true; |
| this.unsubscribe(); |
| this.source.subscribe(this.parent); |
| } |
| } |
| } |
| //# sourceMappingURL=delayWhen.js.map |