74 lines
No EOL
2.3 KiB
JavaScript
74 lines
No EOL
2.3 KiB
JavaScript
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 ExhaustMapOperator(project));
|
|
}
|
|
class ExhaustMapOperator {
|
|
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
|