1 import { OuterSubscriber } from '../OuterSubscriber';
2 import { InnerSubscriber } from '../InnerSubscriber';
3 import { subscribeToResult } from '../util/subscribeToResult';
4 import { map } from './map';
5 import { from } from '../observable/from';
6 export function exhaustMap(project, resultSelector) {
8 return (source) => source.pipe(exhaustMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));
10 return (source) => source.lift(new ExhaustMapOperator(project));
12 class ExhaustMapOperator {
13 constructor(project) {
14 this.project = project;
16 call(subscriber, source) {
17 return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));
20 class ExhaustMapSubscriber extends OuterSubscriber {
21 constructor(destination, project) {
23 this.project = project;
24 this.hasSubscription = false;
25 this.hasCompleted = false;
29 if (!this.hasSubscription) {
35 const index = this.index++;
37 result = this.project(value, index);
40 this.destination.error(err);
43 this.hasSubscription = true;
44 this._innerSub(result, value, index);
46 _innerSub(result, value, index) {
47 const innerSubscriber = new InnerSubscriber(this, value, index);
48 const destination = this.destination;
49 destination.add(innerSubscriber);
50 const innerSubscription = subscribeToResult(this, result, undefined, undefined, innerSubscriber);
51 if (innerSubscription !== innerSubscriber) {
52 destination.add(innerSubscription);
56 this.hasCompleted = true;
57 if (!this.hasSubscription) {
58 this.destination.complete();
62 notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
63 this.destination.next(innerValue);
66 this.destination.error(err);
68 notifyComplete(innerSub) {
69 const destination = this.destination;
70 destination.remove(innerSub);
71 this.hasSubscription = false;
72 if (this.hasCompleted) {
73 this.destination.complete();
77 //# sourceMappingURL=exhaustMap.js.map