<?php
  
  namespace Guzzle\Common;
  
  use Symfony\Component\EventDispatcher\EventDispatcher;
  use Symfony\Component\EventDispatcher\EventDispatcherInterface;
  use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  
  /**
   * Class that holds an event dispatcher
   */
  class AbstractHasDispatcher implements HasDispatcherInterface
  {
      /** @var EventDispatcherInterface */
      protected $eventDispatcher;
  
      public static function getAllEvents()
      {
          return array();
      }
  
      public function setEventDispatcher(EventDispatcherInterface $eventDispatcher)
      {
          $this->eventDispatcher = $eventDispatcher;
  
          return $this;
      }
  
      public function getEventDispatcher()
      {
          if (!$this->eventDispatcher) {
              $this->eventDispatcher = new EventDispatcher();
          }
  
          return $this->eventDispatcher;
      }
  
      public function dispatch($eventName, array $context = array())
      {
          return $this->getEventDispatcher()->dispatch($eventName, new Event($context));
      }
  
      public function addSubscriber(EventSubscriberInterface $subscriber)
      {
          $this->getEventDispatcher()->addSubscriber($subscriber);
  
          return $this;
      }
  }