import { MessageBusHandle, IMessageBusCallback } from './message-bus-handle';
export interface IMessageBusService {
    id: string;
    publish(topic: string, title: string, data?: any): void;
    subscribe(topic: string, callback: IMessageBusCallback): MessageBusHandle;
    unsubscribe(handle: MessageBusHandle): any;
}
/**
 * Simple message bus service, used for subscribing and unsubsubscribing to topics.
 * @see {@link https://gist.github.com/floatingmonkey/3384419}
 */
export declare class MessageBusService implements IMessageBusService {
    private cache;
    private confirms;
    id: string;
    constructor();
    /**
     * Publish to a topic
     */
    publish(topic: string, title: string, data?: any): void;
    /**
     * Subscribe to a topic
     * @param {string} topic The desired topic of the message.
     * @param {IMessageBusCallback} callback The callback to call.
     */
    subscribe(topic: string, callback: IMessageBusCallback): MessageBusHandle;
    /**
     * Unsubscribe to a topic by providing its handle
     */
    unsubscribe(handle: MessageBusHandle): void;
}