ColdObservable.js•1.44 kB
import { Observable } from '../Observable';
import { Subscription } from '../Subscription';
import { SubscriptionLoggable } from './SubscriptionLoggable';
import { applyMixins } from '../util/applyMixins';
import { observeNotification } from '../Notification';
export class ColdObservable extends Observable {
constructor(messages, scheduler) {
super(function (subscriber) {
const observable = this;
const index = observable.logSubscribedFrame();
const subscription = new Subscription();
subscription.add(new Subscription(() => {
observable.logUnsubscribedFrame(index);
}));
observable.scheduleMessages(subscriber);
return subscription;
});
this.messages = messages;
this.subscriptions = [];
this.scheduler = scheduler;
}
scheduleMessages(subscriber) {
const messagesLength = this.messages.length;
for (let i = 0; i < messagesLength; i++) {
const message = this.messages[i];
subscriber.add(this.scheduler.schedule((state) => {
const { message: { notification }, subscriber: destination } = state;
observeNotification(notification, destination);
}, message.frame, { message, subscriber }));
}
}
}
applyMixins(ColdObservable, [SubscriptionLoggable]);
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