import { Topic } from './topic';
import { Subscriber } from './subscriber';
import { SubscribeOption } from './publisher.model';
/**
 * @author Harsh A. Mistry
 *
 * Publisher class to publish new topics and emit values
 */
export declare class Publisher {
    private static _topicMap;
    /**
     * Creates new topic for given topic name
     * @param {string} topicName Name for topic to be created
     *
     * @returns {Topic} New created topic
     */
    static createTopic(topicName: string): Topic;
    /**
     * Subscribe to a particular topic by providing option and a callback function.
     * @param {SubscribeOption} option
     * @param {Function} callback
     * @throws {Topic name cannot be empty or null while subscribing} Error if topic name passed is null or empty
     * @throws {'Cannot find topic with name: ' ${topic_name} '. Please create one and then subscribe.'} If given topic name does not exist
     *
     * @returns {Subscriber}
     */
    static subscribeTopic(option: SubscribeOption, callback: (...args: any[]) => void): Subscriber | undefined;
    /**
     * Unsubscribe any topic for given subscriber
     * @param {string} topicName
     * @throws {'Cannot find topic with name: '  ${topicName}} Thrown when given topic name is not found
     * @param {Subscriber} subscriber Subscriber of this topic
     */
    static unsubscribeTopic(subscriber: Subscriber): void;
}