77 lines
2.5 KiB
JavaScript
77 lines
2.5 KiB
JavaScript
import { OuterSubscriber } from '../OuterSubscriber';
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import { InnerSubscriber } from '../InnerSubscriber';
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import { subscribeToResult } from '../util/subscribeToResult';
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import { map } from './map';
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import { from } from '../observable/from';
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export function exhaustMap(project, resultSelector) {
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if (resultSelector) {
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return (source) => source.pipe(exhaustMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));
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}
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return (source) => source.lift(new ExhaustMapOperator(project));
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}
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class ExhaustMapOperator {
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constructor(project) {
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this.project = project;
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}
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call(subscriber, source) {
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return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));
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}
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}
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class ExhaustMapSubscriber extends OuterSubscriber {
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constructor(destination, project) {
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super(destination);
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this.project = project;
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this.hasSubscription = false;
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this.hasCompleted = false;
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this.index = 0;
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}
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_next(value) {
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if (!this.hasSubscription) {
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this.tryNext(value);
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}
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}
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tryNext(value) {
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let result;
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const index = this.index++;
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try {
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result = this.project(value, index);
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}
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catch (err) {
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this.destination.error(err);
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return;
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}
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this.hasSubscription = true;
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this._innerSub(result, value, index);
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}
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_innerSub(result, value, index) {
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const innerSubscriber = new InnerSubscriber(this, value, index);
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const destination = this.destination;
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destination.add(innerSubscriber);
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const innerSubscription = subscribeToResult(this, result, undefined, undefined, innerSubscriber);
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if (innerSubscription !== innerSubscriber) {
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destination.add(innerSubscription);
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}
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}
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_complete() {
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this.hasCompleted = true;
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if (!this.hasSubscription) {
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this.destination.complete();
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}
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this.unsubscribe();
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}
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notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
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this.destination.next(innerValue);
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}
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notifyError(err) {
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this.destination.error(err);
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}
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notifyComplete(innerSub) {
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const destination = this.destination;
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destination.remove(innerSub);
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this.hasSubscription = false;
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if (this.hasCompleted) {
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this.destination.complete();
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}
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}
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}
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//# sourceMappingURL=exhaustMap.js.map
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