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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Controller
  * @subpackage Zend_Controller_Action_Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Controller_Action_Helper_Abstract
  */
 // require_once 'Zend/Controller/Action/Helper/Abstract.php';
 
 /**
  * Add to action stack
  *
  * @uses       Zend_Controller_Action_Helper_Abstract
  * @category   Zend
  * @package    Zend_Controller
  * @subpackage Zend_Controller_Action_Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Controller_Action_Helper_ActionStack extends Zend_Controller_Action_Helper_Abstract
 {
     /**
      * @var Zend_Controller_Plugin_ActionStack
      */
     protected $_actionStack;
 
     /**
      * Constructor
      *
      * Register action stack plugin
      *
      * @return void
      */
     public function __construct()
     {
         $front = Zend_Controller_Front::getInstance();
         if (!$front->hasPlugin('Zend_Controller_Plugin_ActionStack')) {
             /**
              * @see Zend_Controller_Plugin_ActionStack
              */
             // require_once 'Zend/Controller/Plugin/ActionStack.php';
             $this->_actionStack = new Zend_Controller_Plugin_ActionStack();
             $front->registerPlugin($this->_actionStack, 97);
         } else {
             $this->_actionStack = $front->getPlugin('Zend_Controller_Plugin_ActionStack');
         }
     }
 
     /**
      * Push onto the stack
      *
      * @param  Zend_Controller_Request_Abstract $next
      * @return Zend_Controller_Action_Helper_ActionStack Provides a fluent interface
      */
     public function pushStack(Zend_Controller_Request_Abstract $next)
     {
         $this->_actionStack->pushStack($next);
         return $this;
     }
 
     /**
      * Push a new action onto the stack
      *
      * @param  string $action
      * @param  string $controller
      * @param  string $module
      * @param  array  $params
      * @throws Zend_Controller_Action_Exception
      * @return Zend_Controller_Action_Helper_ActionStack
      */
     public function actionToStack($action, $controller = null, $module = null, array $params = array())
     {
         if ($action instanceof Zend_Controller_Request_Abstract) {
             return $this->pushStack($action);
         } elseif (!is_string($action)) {
             /**
              * @see Zend_Controller_Action_Exception
              */
             // require_once 'Zend/Controller/Action/Exception.php';
             throw new Zend_Controller_Action_Exception('ActionStack requires either a request object or minimally a string action');
         }
 
         $request = $this->getRequest();
 
         if ($request instanceof Zend_Controller_Request_Abstract === false){
             /**
              * @see Zend_Controller_Action_Exception
              */
             // require_once 'Zend/Controller/Action/Exception.php';
             throw new Zend_Controller_Action_Exception('Request object not set yet');
         }
 
         $controller = (null === $controller) ? $request->getControllerName() : $controller;
         $module = (null === $module) ? $request->getModuleName() : $module;
 
         /**
          * @see Zend_Controller_Request_Simple
          */
         // require_once 'Zend/Controller/Request/Simple.php';
         $newRequest = new Zend_Controller_Request_Simple($action, $controller, $module, $params);
 
         return $this->pushStack($newRequest);
     }
 
     /**
      * Perform helper when called as $this->_helper->actionStack() from an action controller
      *
      * Proxies to {@link simple()}
      *
      * @param  string $action
      * @param  string $controller
      * @param  string $module
      * @param  array $params
      * @return boolean
      */
     public function direct($action, $controller = null, $module = null, array $params = array())
     {
         return $this->actionToStack($action, $controller, $module, $params);
     }
 }