source: trip-planner-front/node_modules/rxjs/src/internal/operators/finalize.ts

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1import { Operator } from '../Operator';
2import { Subscriber } from '../Subscriber';
3import { Subscription } from '../Subscription';
4import { Observable } from '../Observable';
5import { MonoTypeOperatorFunction, TeardownLogic } from '../types';
6
7/**
8 * Returns an Observable that mirrors the source Observable, but will call a specified function when
9 * the source terminates on complete or error.
10 * @param {function} callback Function to be called when source terminates.
11 * @return {Observable} An Observable that mirrors the source, but will call the specified function on termination.
12 * @method finally
13 * @owner Observable
14 */
15export function finalize<T>(callback: () => void): MonoTypeOperatorFunction<T> {
16 return (source: Observable<T>) => source.lift(new FinallyOperator(callback));
17}
18
19class FinallyOperator<T> implements Operator<T, T> {
20 constructor(private callback: () => void) {
21 }
22
23 call(subscriber: Subscriber<T>, source: any): TeardownLogic {
24 return source.subscribe(new FinallySubscriber(subscriber, this.callback));
25 }
26}
27
28/**
29 * We need this JSDoc comment for affecting ESDoc.
30 * @ignore
31 * @extends {Ignored}
32 */
33class FinallySubscriber<T> extends Subscriber<T> {
34 constructor(destination: Subscriber<T>, callback: () => void) {
35 super(destination);
36 this.add(new Subscription(callback));
37 }
38}
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