import {Subject} from '../Subject';
import {Observer} from '../Observer';
import {Subscription} from '../Subscription';
export class SubjectSubscription extends Subscription {
isUnsubscribed: boolean = false;
constructor(public subject: Subject<any>, public observer: Observer<any>) {
super();
}
unsubscribe() {
Iif (this.isUnsubscribed) {
return;
}
this.isUnsubscribed = true;
const subject = this.subject;
const observers = subject.observers;
this.subject = null;
if (!observers || observers.length === 0 || subject.isUnsubscribed) {
return;
}
const subscriberIndex = observers.indexOf(this.observer);
Eif (subscriberIndex !== -1) {
observers.splice(subscriberIndex, 1);
}
}
}
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