/**
 * Event Subscriber
 *
 *  Copyright (C) 2010-2019 R-T Specialty, LLC.
 *
 *  This file is part of liza.
 *
 *  liza is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Subscribe to events
 */

import { EventEmitter } from "events";

export class EventSubscriber extends EventEmitter
{
    /**
     * Initialize subscriber
     *
     * @param _emitter - the event emitter
     */
    constructor(
        private readonly _emitter: EventEmitter
    ) {
        super();
    }


    subscribe( event_id: string, callback: ( arg: any ) => void ): void
    {
        this._emitter.on( event_id, callback );
    }
}