<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zend-eventmanager for the canonical source repository
 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   https://github.com/zendframework/zend-eventmanager/blob/master/LICENSE.md
 */

namespace Zend\EventManager;

/**
 * Interface for self-registering event listeners.
 *
 * Classes implementing this interface may be registered by name or instance
 * with an EventManager, without an event name. The {@link attach()} method will
 * then be called with the current EventManager instance, allowing the class to
 * wire up one or more listeners.
 */
interface ListenerAggregateInterface
{
    /**
     * Attach one or more listeners
     *
     * Implementors may add an optional $priority argument; the EventManager
     * implementation will pass this to the aggregate.
     *
     * @param EventManagerInterface $events
     * @param int                   $priority
     * @return void
     */
    public function attach(EventManagerInterface $events, $priority = 1);

    /**
     * Detach all previously attached listeners
     *
     * @param EventManagerInterface $events
     * @return void
     */
    public function detach(EventManagerInterface $events);
}