import {Operator} from '../Operator';
import {Subscriber} from '../Subscriber';
import {Scheduler} from '../Scheduler';
import {asap} from '../scheduler/asap';
import {Subscription} from '../Subscription';
import {Observable} from '../Observable';
import {isDate} from '../util/isDate';
import {OuterSubscriber} from '../OuterSubscriber';
import {subscribeToResult} from '../util/subscribeToResult';
export function timeoutWith<T, R>(due: number | Date,
withObservable: Observable<R>,
Ischeduler: Scheduler = asap): Observable<T | R> {
let absoluteTimeout = isDate(due);
let waitFor = absoluteTimeout ? (+due - scheduler.now()) : Math.abs(<number>due);
return this.lift(new TimeoutWithOperator(waitFor, absoluteTimeout, withObservable, scheduler));
}
class TimeoutWithOperator<T> implements Operator<T, T> {
constructor(private waitFor: number,
private absoluteTimeout: boolean,
private withObservable: Observable<any>,
private scheduler: Scheduler) {
}
call(subscriber: Subscriber<T>) {
return new TimeoutWithSubscriber(
subscriber, this.absoluteTimeout, this.waitFor, this.withObservable, this.scheduler
);
}
}
class TimeoutWithSubscriber<T, R> extends OuterSubscriber<T, R> {
private timeoutSubscription: Subscription = undefined;
private index: number = 0;
private _previousIndex: number = 0;
get previousIndex(): number {
return this._previousIndex;
}
private _hasCompleted: boolean = false;
get hasCompleted(): boolean {
return this._hasCompleted;
}
constructor(public destination: Subscriber<T>,
private absoluteTimeout: boolean,
private waitFor: number,
private withObservable: Observable<any>,
private scheduler: Scheduler) {
super();
destination.add(this);
this.scheduleTimeout();
}
private static dispatchTimeout(state: any): void {
const source = state.subscriber;
const currentIndex = state.index;
if (!source.hasCompleted && source.previousIndex === currentIndex) {
source.handleTimeout();
}
}
private scheduleTimeout(): void {
let currentIndex = this.index;
const timeoutState = { subscriber: this, index: currentIndex };
this.scheduler.schedule(TimeoutWithSubscriber.dispatchTimeout, this.waitFor, timeoutState);
this.index++;
this._previousIndex = currentIndex;
}
protected _next(value: T) {
this.destination.next(value);
if (!this.absoluteTimeout) {
this.scheduleTimeout();
}
}
protected _error(err: any) {
this.destination.error(err);
this._hasCompleted = true;
}
protected _complete() {
this.destination.complete();
this._hasCompleted = true;
}
handleTimeout(): void {
if (!this.isUnsubscribed) {
const withObservable = this.withObservable;
this.unsubscribe();
this.destination.add(this.timeoutSubscription = subscribeToResult(this, withObservable));
}
}
}
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