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