JezK

Edit File: HotObservable.ts

import { Subject } from '../Subject';
import { Subscriber } from '../Subscriber';
import { Subscription } from '../Subscription';
import { Scheduler } from '../Scheduler';
import { TestMessage } from './TestMessage';
import { SubscriptionLog } from './SubscriptionLog';
import { SubscriptionLoggable } from './SubscriptionLoggable';
import { applyMixins } from '../util/applyMixins';
import { observeNotification } from '../Notification';

export class HotObservable<T> extends Subject<T> implements SubscriptionLoggable {
  public subscriptions: SubscriptionLog[] = [];
  scheduler: Scheduler;
  // @ts-ignore: Property has no initializer and is not definitely assigned
  logSubscribedFrame: () => number;
  // @ts-ignore: Property has no initializer and is not definitely assigned
  logUnsubscribedFrame: (index: number) => void;

constructor(public messages: TestMessage[], scheduler: Scheduler) {
    super();
    this.scheduler = scheduler;
  }

/** @internal */
  protected _subscribe(subscriber: Subscriber<any>): Subscription {
    const subject: HotObservable<T> = this;
    const index = subject.logSubscribedFrame();
    const subscription = new Subscription();
    subscription.add(
      new Subscription(() => {
        subject.logUnsubscribedFrame(index);
      })
    );
    subscription.add(super._subscribe(subscriber));
    return subscription;
  }

setup() {
    const subject = this;
    const messagesLength = subject.messages.length;
    /* tslint:disable:no-var-keyword */
    for (let i = 0; i < messagesLength; i++) {
      (() => {
        const { notification, frame } = subject.messages[i];
        /* tslint:enable */
        subject.scheduler.schedule(() => {
          observeNotification(notification, subject);
        }, frame);
      })();
    }
  }
}
applyMixins(HotObservable, [SubscriptionLoggable]);

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