41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
|
import { Subject } from './Subject';
|
||
|
|
import { Subscription } from './Subscription';
|
||
|
|
export class AsyncSubject extends Subject {
|
||
|
|
constructor() {
|
||
|
|
super(...arguments);
|
||
|
|
this.value = null;
|
||
|
|
this.hasNext = false;
|
||
|
|
this.hasCompleted = false;
|
||
|
|
}
|
||
|
|
_subscribe(subscriber) {
|
||
|
|
if (this.hasError) {
|
||
|
|
subscriber.error(this.thrownError);
|
||
|
|
return Subscription.EMPTY;
|
||
|
|
}
|
||
|
|
else if (this.hasCompleted && this.hasNext) {
|
||
|
|
subscriber.next(this.value);
|
||
|
|
subscriber.complete();
|
||
|
|
return Subscription.EMPTY;
|
||
|
|
}
|
||
|
|
return super._subscribe(subscriber);
|
||
|
|
}
|
||
|
|
next(value) {
|
||
|
|
if (!this.hasCompleted) {
|
||
|
|
this.value = value;
|
||
|
|
this.hasNext = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
error(error) {
|
||
|
|
if (!this.hasCompleted) {
|
||
|
|
super.error(error);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
complete() {
|
||
|
|
this.hasCompleted = true;
|
||
|
|
if (this.hasNext) {
|
||
|
|
super.next(this.value);
|
||
|
|
}
|
||
|
|
super.complete();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=AsyncSubject.js.map
|