diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Controller/Action/HelperBroker.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Controller/Action/HelperBroker.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,381 @@
+<?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
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: HelperBroker.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Controller_Action_HelperBroker_PriorityStack
+ */
+require_once 'Zend/Controller/Action/HelperBroker/PriorityStack.php';
+
+/**
+ * @see Zend_Loader
+ */
+require_once 'Zend/Loader.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Controller
+ * @subpackage Zend_Controller_Action
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Controller_Action_HelperBroker
+{
+    /**
+     * $_actionController - ActionController reference
+     *
+     * @var Zend_Controller_Action
+     */
+    protected $_actionController;
+
+    /**
+     * @var Zend_Loader_PluginLoader_Interface
+     */
+    protected static $_pluginLoader;
+
+    /**
+     * $_helpers - Helper array
+     *
+     * @var Zend_Controller_Action_HelperBroker_PriorityStack
+     */
+    protected static $_stack = null;
+
+    /**
+     * Set PluginLoader for use with broker
+     *
+     * @param  Zend_Loader_PluginLoader_Interface $loader
+     * @return void
+     */
+    public static function setPluginLoader($loader)
+    {
+        if ((null !== $loader) && (!$loader instanceof Zend_Loader_PluginLoader_Interface)) {
+            require_once 'Zend/Controller/Action/Exception.php';
+            throw new Zend_Controller_Action_Exception('Invalid plugin loader provided to HelperBroker');
+        }
+        self::$_pluginLoader = $loader;
+    }
+
+    /**
+     * Retrieve PluginLoader
+     *
+     * @return Zend_Loader_PluginLoader
+     */
+    public static function getPluginLoader()
+    {
+        if (null === self::$_pluginLoader) {
+            require_once 'Zend/Loader/PluginLoader.php';
+            self::$_pluginLoader = new Zend_Loader_PluginLoader(array(
+                'Zend_Controller_Action_Helper' => 'Zend/Controller/Action/Helper/',
+            ));
+        }
+        return self::$_pluginLoader;
+    }
+
+    /**
+     * addPrefix() - Add repository of helpers by prefix
+     *
+     * @param string $prefix
+     */
+    static public function addPrefix($prefix)
+    {
+        $prefix = rtrim($prefix, '_');
+        $path   = str_replace('_', DIRECTORY_SEPARATOR, $prefix);
+        self::getPluginLoader()->addPrefixPath($prefix, $path);
+    }
+
+    /**
+     * addPath() - Add path to repositories where Action_Helpers could be found.
+     *
+     * @param string $path
+     * @param string $prefix Optional; defaults to 'Zend_Controller_Action_Helper'
+     * @return void
+     */
+    static public function addPath($path, $prefix = 'Zend_Controller_Action_Helper')
+    {
+        self::getPluginLoader()->addPrefixPath($prefix, $path);
+    }
+
+    /**
+     * addHelper() - Add helper objects
+     *
+     * @param Zend_Controller_Action_Helper_Abstract $helper
+     * @return void
+     */
+    static public function addHelper(Zend_Controller_Action_Helper_Abstract $helper)
+    {
+        self::getStack()->push($helper);
+        return;
+    }
+
+    /**
+     * resetHelpers()
+     *
+     * @return void
+     */
+    static public function resetHelpers()
+    {
+        self::$_stack = null;
+        return;
+    }
+
+    /**
+     * Retrieve or initialize a helper statically
+     *
+     * Retrieves a helper object statically, loading on-demand if the helper
+     * does not already exist in the stack. Always returns a helper, unless
+     * the helper class cannot be found.
+     *
+     * @param  string $name
+     * @return Zend_Controller_Action_Helper_Abstract
+     */
+    public static function getStaticHelper($name)
+    {
+        $name  = self::_normalizeHelperName($name);
+        $stack = self::getStack();
+
+        if (!isset($stack->{$name})) {
+            self::_loadHelper($name);
+        }
+
+        return $stack->{$name};
+    }
+
+    /**
+     * getExistingHelper() - get helper by name
+     *
+     * Static method to retrieve helper object. Only retrieves helpers already
+     * initialized with the broker (either via addHelper() or on-demand loading
+     * via getHelper()).
+     *
+     * Throws an exception if the referenced helper does not exist in the
+     * stack; use {@link hasHelper()} to check if the helper is registered
+     * prior to retrieving it.
+     *
+     * @param  string $name
+     * @return Zend_Controller_Action_Helper_Abstract
+     * @throws Zend_Controller_Action_Exception
+     */
+    public static function getExistingHelper($name)
+    {
+        $name  = self::_normalizeHelperName($name);
+        $stack = self::getStack();
+
+        if (!isset($stack->{$name})) {
+            require_once 'Zend/Controller/Action/Exception.php';
+            throw new Zend_Controller_Action_Exception('Action helper "' . $name . '" has not been registered with the helper broker');
+        }
+
+        return $stack->{$name};
+    }
+
+    /**
+     * Return all registered helpers as helper => object pairs
+     *
+     * @return array
+     */
+    public static function getExistingHelpers()
+    {
+        return self::getStack()->getHelpersByName();
+    }
+
+    /**
+     * Is a particular helper loaded in the broker?
+     *
+     * @param  string $name
+     * @return boolean
+     */
+    public static function hasHelper($name)
+    {
+        $name = self::_normalizeHelperName($name);
+        return isset(self::getStack()->{$name});
+    }
+
+    /**
+     * Remove a particular helper from the broker
+     *
+     * @param  string $name
+     * @return boolean
+     */
+    public static function removeHelper($name)
+    {
+        $name = self::_normalizeHelperName($name);
+        $stack = self::getStack();
+        if (isset($stack->{$name})) {
+            unset($stack->{$name});
+        }
+
+        return false;
+    }
+
+    /**
+     * Lazy load the priority stack and return it
+     *
+     * @return Zend_Controller_Action_HelperBroker_PriorityStack
+     */
+    public static function getStack()
+    {
+        if (self::$_stack == null) {
+            self::$_stack = new Zend_Controller_Action_HelperBroker_PriorityStack();
+        }
+
+        return self::$_stack;
+    }
+
+    /**
+     * Constructor
+     *
+     * @param Zend_Controller_Action $actionController
+     * @return void
+     */
+    public function __construct(Zend_Controller_Action $actionController)
+    {
+        $this->_actionController = $actionController;
+        foreach (self::getStack() as $helper) {
+            $helper->setActionController($actionController);
+            $helper->init();
+        }
+    }
+
+    /**
+     * notifyPreDispatch() - called by action controller dispatch method
+     *
+     * @return void
+     */
+    public function notifyPreDispatch()
+    {
+        foreach (self::getStack() as $helper) {
+            $helper->preDispatch();
+        }
+    }
+
+    /**
+     * notifyPostDispatch() - called by action controller dispatch method
+     *
+     * @return void
+     */
+    public function notifyPostDispatch()
+    {
+        foreach (self::getStack() as $helper) {
+            $helper->postDispatch();
+        }
+    }
+
+    /**
+     * getHelper() - get helper by name
+     *
+     * @param  string $name
+     * @return Zend_Controller_Action_Helper_Abstract
+     */
+    public function getHelper($name)
+    {
+        $name  = self::_normalizeHelperName($name);
+        $stack = self::getStack();
+
+        if (!isset($stack->{$name})) {
+            self::_loadHelper($name);
+        }
+
+        $helper = $stack->{$name};
+
+        $initialize = false;
+        if (null === ($actionController = $helper->getActionController())) {
+            $initialize = true;
+        } elseif ($actionController !== $this->_actionController) {
+            $initialize = true;
+        }
+
+        if ($initialize) {
+            $helper->setActionController($this->_actionController)
+                   ->init();
+        }
+
+        return $helper;
+    }
+
+    /**
+     * Method overloading
+     *
+     * @param  string $method
+     * @param  array $args
+     * @return mixed
+     * @throws Zend_Controller_Action_Exception if helper does not have a direct() method
+     */
+    public function __call($method, $args)
+    {
+        $helper = $this->getHelper($method);
+        if (!method_exists($helper, 'direct')) {
+            require_once 'Zend/Controller/Action/Exception.php';
+            throw new Zend_Controller_Action_Exception('Helper "' . $method . '" does not support overloading via direct()');
+        }
+        return call_user_func_array(array($helper, 'direct'), $args);
+    }
+
+    /**
+     * Retrieve helper by name as object property
+     *
+     * @param  string $name
+     * @return Zend_Controller_Action_Helper_Abstract
+     */
+    public function __get($name)
+    {
+        return $this->getHelper($name);
+    }
+
+    /**
+     * Normalize helper name for lookups
+     *
+     * @param  string $name
+     * @return string
+     */
+    protected static function _normalizeHelperName($name)
+    {
+        if (strpos($name, '_') !== false) {
+            $name = str_replace(' ', '', ucwords(str_replace('_', ' ', $name)));
+        }
+
+        return ucfirst($name);
+    }
+
+    /**
+     * Load a helper
+     *
+     * @param  string $name
+     * @return void
+     */
+    protected static function _loadHelper($name)
+    {
+        try {
+            $class = self::getPluginLoader()->load($name);
+        } catch (Zend_Loader_PluginLoader_Exception $e) {
+            require_once 'Zend/Controller/Action/Exception.php';
+            throw new Zend_Controller_Action_Exception('Action Helper by name ' . $name . ' not found', 0, $e);
+        }
+
+        $helper = new $class();
+
+        if (!$helper instanceof Zend_Controller_Action_Helper_Abstract) {
+            require_once 'Zend/Controller/Action/Exception.php';
+            throw new Zend_Controller_Action_Exception('Helper name ' . $name . ' -> class ' . $class . ' is not of type Zend_Controller_Action_Helper_Abstract');
+        }
+
+        self::getStack()->push($helper);
+    }
+}