import { Observable } from '../Observable';
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import { multicast } from './multicast';
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import { refCount } from './refCount';
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import { Subject } from '../Subject';
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import { MonoTypeOperatorFunction } from '../types';
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function shareSubjectFactory() {
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return new Subject();
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}
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/**
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* Returns a new Observable that multicasts (shares) the original Observable. As long as there is at least one
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* Subscriber this Observable will be subscribed and emitting data. When all subscribers have unsubscribed it will
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* unsubscribe from the source Observable. Because the Observable is multicasting it makes the stream `hot`.
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* This is an alias for `multicast(() => new Subject()), refCount()`.
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*
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* 
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*
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* @return {Observable<T>} An Observable that upon connection causes the source Observable to emit items to its Observers.
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* @method share
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* @owner Observable
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*/
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export function share<T>(): MonoTypeOperatorFunction<T> {
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return (source: Observable<T>) => refCount()(multicast(shareSubjectFactory)(source)) as Observable<T>;
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}
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