import {Operator} from '../Operator';
import {Observable} from '../Observable';
import {Subscriber} from '../Subscriber';
import {Notification} from '../Notification';
/**
* Returns an Observable that represents all of the emissions and notifications
* from the source Observable into emissions marked with their original types
* within a `Notification` objects.
*
* <img src="./img/materialize.png" width="100%">
*
* @scheduler materialize does not operate by default on a particular Scheduler.
* @returns {Observable} an Observable that emits items that are the result of
* materializing the items and notifications of the source Observable.
*/
export function materialize<T>(): Observable<Notification<T>> {
return this.lift(new MaterializeOperator());
}
class MaterializeOperator<T> implements Operator<T, Notification<T>> {
call(subscriber: Subscriber<Notification<T>>): Subscriber<T> {
return new MaterializeSubscriber(subscriber);
}
}
class MaterializeSubscriber<T> extends Subscriber<T> {
constructor(destination: Subscriber<Notification<T>>) {
super(destination);
}
protected _next(value: T) {
this.destination.next(Notification.createNext(value));
}
protected _error(err: any) {
const destination = this.destination;
destination.next(Notification.createError(err));
destination.complete();
}
protected _complete() {
const destination = this.destination;
destination.next(Notification.createComplete());
destination.complete();
}
}
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