382 Zeilen
10 KiB
PHP
382 Zeilen
10 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Controller
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* @subpackage Zend_Controller_Action
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* @see Zend_Controller_Action_HelperBroker_PriorityStack
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*/
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require_once 'Zend/Controller/Action/HelperBroker/PriorityStack.php';
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/**
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* @see Zend_Loader
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*/
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require_once 'Zend/Loader.php';
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/**
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* @category Zend
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* @package Zend_Controller
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* @subpackage Zend_Controller_Action
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Controller_Action_HelperBroker
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{
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/**
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* $_actionController - ActionController reference
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*
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* @var Zend_Controller_Action
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*/
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protected $_actionController;
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/**
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* @var Zend_Loader_PluginLoader_Interface
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*/
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protected static $_pluginLoader;
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/**
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* $_helpers - Helper array
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*
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* @var Zend_Controller_Action_HelperBroker_PriorityStack
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*/
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protected static $_stack = null;
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/**
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* Set PluginLoader for use with broker
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*
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* @param Zend_Loader_PluginLoader_Interface $loader
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* @return void
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*/
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public static function setPluginLoader($loader)
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{
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if ((null !== $loader) && (!$loader instanceof Zend_Loader_PluginLoader_Interface)) {
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require_once 'Zend/Controller/Action/Exception.php';
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throw new Zend_Controller_Action_Exception('Invalid plugin loader provided to HelperBroker');
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}
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self::$_pluginLoader = $loader;
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}
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/**
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* Retrieve PluginLoader
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*
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* @return Zend_Loader_PluginLoader
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*/
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public static function getPluginLoader()
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{
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if (null === self::$_pluginLoader) {
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require_once 'Zend/Loader/PluginLoader.php';
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self::$_pluginLoader = new Zend_Loader_PluginLoader(array(
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'Zend_Controller_Action_Helper' => 'Zend/Controller/Action/Helper/',
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));
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}
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return self::$_pluginLoader;
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}
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/**
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* addPrefix() - Add repository of helpers by prefix
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*
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* @param string $prefix
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*/
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static public function addPrefix($prefix)
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{
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$prefix = rtrim($prefix, '_');
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$path = str_replace('_', DIRECTORY_SEPARATOR, $prefix);
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self::getPluginLoader()->addPrefixPath($prefix, $path);
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}
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/**
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* addPath() - Add path to repositories where Action_Helpers could be found.
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*
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* @param string $path
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* @param string $prefix Optional; defaults to 'Zend_Controller_Action_Helper'
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* @return void
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*/
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static public function addPath($path, $prefix = 'Zend_Controller_Action_Helper')
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{
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self::getPluginLoader()->addPrefixPath($prefix, $path);
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}
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/**
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* addHelper() - Add helper objects
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*
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* @param Zend_Controller_Action_Helper_Abstract $helper
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* @return void
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*/
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static public function addHelper(Zend_Controller_Action_Helper_Abstract $helper)
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{
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self::getStack()->push($helper);
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return;
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}
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/**
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* resetHelpers()
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*
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* @return void
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*/
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static public function resetHelpers()
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{
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self::$_stack = null;
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return;
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}
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/**
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* Retrieve or initialize a helper statically
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*
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* Retrieves a helper object statically, loading on-demand if the helper
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* does not already exist in the stack. Always returns a helper, unless
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* the helper class cannot be found.
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*
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* @param string $name
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* @return Zend_Controller_Action_Helper_Abstract
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*/
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public static function getStaticHelper($name)
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{
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$name = self::_normalizeHelperName($name);
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$stack = self::getStack();
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if (!isset($stack->{$name})) {
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self::_loadHelper($name);
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}
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return $stack->{$name};
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}
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/**
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* getExistingHelper() - get helper by name
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*
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* Static method to retrieve helper object. Only retrieves helpers already
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* initialized with the broker (either via addHelper() or on-demand loading
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* via getHelper()).
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*
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* Throws an exception if the referenced helper does not exist in the
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* stack; use {@link hasHelper()} to check if the helper is registered
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* prior to retrieving it.
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*
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* @param string $name
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* @return Zend_Controller_Action_Helper_Abstract
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* @throws Zend_Controller_Action_Exception
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*/
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public static function getExistingHelper($name)
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{
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$name = self::_normalizeHelperName($name);
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$stack = self::getStack();
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if (!isset($stack->{$name})) {
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require_once 'Zend/Controller/Action/Exception.php';
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throw new Zend_Controller_Action_Exception('Action helper "' . $name . '" has not been registered with the helper broker');
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}
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return $stack->{$name};
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}
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/**
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* Return all registered helpers as helper => object pairs
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*
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* @return array
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*/
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public static function getExistingHelpers()
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{
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return self::getStack()->getHelpersByName();
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}
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/**
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* Is a particular helper loaded in the broker?
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*
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* @param string $name
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* @return boolean
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*/
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public static function hasHelper($name)
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{
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$name = self::_normalizeHelperName($name);
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return isset(self::getStack()->{$name});
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}
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/**
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* Remove a particular helper from the broker
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*
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* @param string $name
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* @return boolean
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*/
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public static function removeHelper($name)
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{
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$name = self::_normalizeHelperName($name);
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$stack = self::getStack();
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if (isset($stack->{$name})) {
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unset($stack->{$name});
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}
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return false;
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}
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/**
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* Lazy load the priority stack and return it
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*
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* @return Zend_Controller_Action_HelperBroker_PriorityStack
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*/
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public static function getStack()
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{
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if (self::$_stack == null) {
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self::$_stack = new Zend_Controller_Action_HelperBroker_PriorityStack();
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}
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return self::$_stack;
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}
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/**
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* Constructor
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*
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* @param Zend_Controller_Action $actionController
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* @return void
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*/
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public function __construct(Zend_Controller_Action $actionController)
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{
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$this->_actionController = $actionController;
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foreach (self::getStack() as $helper) {
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$helper->setActionController($actionController);
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$helper->init();
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}
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}
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/**
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* notifyPreDispatch() - called by action controller dispatch method
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*
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* @return void
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*/
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public function notifyPreDispatch()
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{
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foreach (self::getStack() as $helper) {
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$helper->preDispatch();
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}
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}
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/**
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* notifyPostDispatch() - called by action controller dispatch method
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*
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* @return void
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*/
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public function notifyPostDispatch()
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{
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foreach (self::getStack() as $helper) {
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$helper->postDispatch();
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}
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}
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/**
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* getHelper() - get helper by name
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*
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* @param string $name
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* @return Zend_Controller_Action_Helper_Abstract
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*/
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public function getHelper($name)
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{
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$name = self::_normalizeHelperName($name);
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$stack = self::getStack();
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if (!isset($stack->{$name})) {
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self::_loadHelper($name);
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}
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$helper = $stack->{$name};
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$initialize = false;
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if (null === ($actionController = $helper->getActionController())) {
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$initialize = true;
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} elseif ($actionController !== $this->_actionController) {
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$initialize = true;
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}
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if ($initialize) {
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$helper->setActionController($this->_actionController)
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->init();
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}
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return $helper;
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}
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/**
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* Method overloading
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*
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* @param string $method
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* @param array $args
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* @return mixed
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* @throws Zend_Controller_Action_Exception if helper does not have a direct() method
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*/
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public function __call($method, $args)
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{
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$helper = $this->getHelper($method);
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if (!method_exists($helper, 'direct')) {
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require_once 'Zend/Controller/Action/Exception.php';
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throw new Zend_Controller_Action_Exception('Helper "' . $method . '" does not support overloading via direct()');
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}
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return call_user_func_array(array($helper, 'direct'), $args);
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}
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/**
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* Retrieve helper by name as object property
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*
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* @param string $name
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* @return Zend_Controller_Action_Helper_Abstract
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*/
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public function __get($name)
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{
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return $this->getHelper($name);
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}
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/**
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* Normalize helper name for lookups
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*
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* @param string $name
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* @return string
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*/
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protected static function _normalizeHelperName($name)
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{
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if (strpos($name, '_') !== false) {
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$name = str_replace(' ', '', ucwords(str_replace('_', ' ', $name)));
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}
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return ucfirst($name);
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}
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/**
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* Load a helper
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*
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||
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* @param string $name
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* @return void
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*/
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protected static function _loadHelper($name)
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{
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try {
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$class = self::getPluginLoader()->load($name);
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} catch (Zend_Loader_PluginLoader_Exception $e) {
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require_once 'Zend/Controller/Action/Exception.php';
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throw new Zend_Controller_Action_Exception('Action Helper by name ' . $name . ' not found', 0, $e);
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}
|
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$helper = new $class();
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if (!$helper instanceof Zend_Controller_Action_Helper_Abstract) {
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require_once 'Zend/Controller/Action/Exception.php';
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throw new Zend_Controller_Action_Exception('Helper name ' . $name . ' -> class ' . $class . ' is not of type Zend_Controller_Action_Helper_Abstract');
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}
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self::getStack()->push($helper);
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}
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}
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