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