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53 lines
1.9 KiB
TypeScript
53 lines
1.9 KiB
TypeScript
1 month ago
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import { Observable } from '../Observable';
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import { Subscription } from '../Subscription';
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import { Scheduler } from '../Scheduler';
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import { TestMessage } from './TestMessage';
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import { SubscriptionLog } from './SubscriptionLog';
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import { SubscriptionLoggable } from './SubscriptionLoggable';
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import { applyMixins } from '../util/applyMixins';
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import { Subscriber } from '../Subscriber';
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import { observeNotification } from '../Notification';
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export class ColdObservable<T> extends Observable<T> implements SubscriptionLoggable {
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public subscriptions: SubscriptionLog[] = [];
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scheduler: Scheduler;
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// @ts-ignore: Property has no initializer and is not definitely assigned
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logSubscribedFrame: () => number;
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// @ts-ignore: Property has no initializer and is not definitely assigned
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logUnsubscribedFrame: (index: number) => void;
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constructor(public messages: TestMessage[], scheduler: Scheduler) {
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super(function (this: Observable<T>, subscriber: Subscriber<any>) {
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const observable: ColdObservable<T> = this as any;
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const index = observable.logSubscribedFrame();
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const subscription = new Subscription();
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subscription.add(
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new Subscription(() => {
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observable.logUnsubscribedFrame(index);
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})
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);
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observable.scheduleMessages(subscriber);
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return subscription;
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});
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this.scheduler = scheduler;
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}
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scheduleMessages(subscriber: Subscriber<any>) {
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const messagesLength = this.messages.length;
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for (let i = 0; i < messagesLength; i++) {
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const message = this.messages[i];
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subscriber.add(
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this.scheduler.schedule(
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(state) => {
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const { message: { notification }, subscriber: destination } = state!;
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observeNotification(notification, destination);
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},
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message.frame,
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{ message, subscriber }
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)
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);
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}
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}
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}
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applyMixins(ColdObservable, [SubscriptionLoggable]);
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