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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_Filter
  * @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_Filter_Interface
  */
 // require_once 'Zend/Filter/Interface.php';
 
 /**
  * @category   Zend
  * @package    Zend_Filter
  * @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_Filter implements Zend_Filter_Interface
 {
 
     const CHAIN_APPEND  = 'append';
     const CHAIN_PREPEND = 'prepend';
 
     /**
      * Filter chain
      *
      * @var array
      */
     protected $_filters = array();
 
     /**
      * Default Namespaces
      *
      * @var array
      */
     protected static $_defaultNamespaces = array();
 
     /**
      * Adds a filter to the chain
      *
      * @param  Zend_Filter_Interface $filter
      * @param  string $placement
      * @return Zend_Filter Provides a fluent interface
      */
     public function addFilter(Zend_Filter_Interface $filter, $placement = self::CHAIN_APPEND)
     {
         if ($placement == self::CHAIN_PREPEND) {
             array_unshift($this->_filters, $filter);
         } else {
             $this->_filters[] = $filter;
         }
         return $this;
     }
 
     /**
      * Add a filter to the end of the chain
      *
      * @param  Zend_Filter_Interface $filter
      * @return Zend_Filter Provides a fluent interface
      */
     public function appendFilter(Zend_Filter_Interface $filter)
     {
         return $this->addFilter($filter, self::CHAIN_APPEND);
     }
 
     /**
      * Add a filter to the start of the chain
      *
      * @param  Zend_Filter_Interface $filter
      * @return Zend_Filter Provides a fluent interface
      */
     public function prependFilter(Zend_Filter_Interface $filter)
     {
         return $this->addFilter($filter, self::CHAIN_PREPEND);
     }
 
     /**
      * Get all the filters
      *
      * @return array
      */
     public function getFilters()
     {
         return $this->_filters;
     }
 
     /**
      * Returns $value filtered through each filter in the chain
      *
      * Filters are run in the order in which they were added to the chain (FIFO)
      *
      * @param  mixed $value
      * @return mixed
      */
     public function filter($value)
     {
         $valueFiltered = $value;
         foreach ($this->_filters as $filter) {
             $valueFiltered = $filter->filter($valueFiltered);
         }
         return $valueFiltered;
     }
 
     /**
      * Returns the set default namespaces
      *
      * @return array
      */
     public static function getDefaultNamespaces()
     {
         return self::$_defaultNamespaces;
     }
 
     /**
      * Sets new default namespaces
      *
      * @param array|string $namespace
      * @return null
      */
     public static function setDefaultNamespaces($namespace)
     {
         if (!is_array($namespace)) {
             $namespace = array((string) $namespace);
         }
 
         self::$_defaultNamespaces = $namespace;
     }
 
     /**
      * Adds a new default namespace
      *
      * @param array|string $namespace
      * @return null
      */
     public static function addDefaultNamespaces($namespace)
     {
         if (!is_array($namespace)) {
             $namespace = array((string) $namespace);
         }
 
         self::$_defaultNamespaces = array_unique(array_merge(self::$_defaultNamespaces, $namespace));
     }
 
     /**
      * Returns true when defaultNamespaces are set
      *
      * @return boolean
      */
     public static function hasDefaultNamespaces()
     {
         return (!empty(self::$_defaultNamespaces));
     }
 
     /**
      * @deprecated
      * @see Zend_Filter::filterStatic()
      *
      * @param  mixed        $value
      * @param  string       $classBaseName
      * @param  array        $args          OPTIONAL
      * @param  array|string $namespaces    OPTIONAL
      * @return mixed
      * @throws Zend_Filter_Exception
      */
     public static function get($value, $classBaseName, array $args = array(), $namespaces = array())
     {
         trigger_error(
             'Zend_Filter::get() is deprecated as of 1.9.0; please update your code to utilize Zend_Filter::filterStatic()',
             E_USER_NOTICE
         );
 
         return self::filterStatic($value, $classBaseName, $args, $namespaces);
     }
 
     /**
      * Returns a value filtered through a specified filter class, without requiring separate
      * instantiation of the filter object.
      *
      * The first argument of this method is a data input value, that you would have filtered.
      * The second argument is a string, which corresponds to the basename of the filter class,
      * relative to the Zend_Filter namespace. This method automatically loads the class,
      * creates an instance, and applies the filter() method to the data input. You can also pass
      * an array of constructor arguments, if they are needed for the filter class.
      *
      * @param  mixed        $value
      * @param  string       $classBaseName
      * @param  array        $args          OPTIONAL
      * @param  array|string $namespaces    OPTIONAL
      * @return mixed
      * @throws Zend_Filter_Exception
      */
     public static function filterStatic($value, $classBaseName, array $args = array(), $namespaces = array())
     {
         // require_once 'Zend/Loader.php';
         $namespaces = array_merge((array) $namespaces, self::$_defaultNamespaces, array('Zend_Filter'));
         foreach ($namespaces as $namespace) {
             $className = $namespace . '_' . ucfirst($classBaseName);
             if (!class_exists($className, false)) {
                 try {
                     $file = str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
                     if (Zend_Loader::isReadable($file)) {
                         Zend_Loader::loadClass($className);
                     } else {
                         continue;
                     }
                 } catch (Zend_Exception $ze) {
                     continue;
                 }
             }
 
             $class = new ReflectionClass($className);
             if ($class->implementsInterface('Zend_Filter_Interface')) {
                 if ($class->hasMethod('__construct')) {
                     $object = $class->newInstanceArgs($args);
                 } else {
                     $object = $class->newInstance();
                 }
                 return $object->filter($value);
             }
         }
         // require_once 'Zend/Filter/Exception.php';
         throw new Zend_Filter_Exception("Filter class not found from basename '$classBaseName'");
     }
 }