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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_File_Rename implements Zend_Filter_Interface
 {
     /**
      * Internal array of array(source, target, overwrite)
      */
     protected $_files = array();
 
     /**
      * Class constructor
      *
      * Options argument may be either a string, a Zend_Config object, or an array.
      * If an array or Zend_Config object, it accepts the following keys:
      * 'source'    => Source filename or directory which will be renamed
      * 'target'    => Target filename or directory, the new name of the sourcefile
      * 'overwrite' => Shall existing files be overwritten ?
      *
      * @param  string|array $options Target file or directory to be renamed
      * @param  string $target Source filename or directory (deprecated)
      * @param  bool $overwrite Should existing files be overwritten (deprecated)
      * @return void
      */
     public function __construct($options)
     {
         if ($options instanceof Zend_Config) {
             $options = $options->toArray();
         } elseif (is_string($options)) {
             $options = array('target' => $options);
         } elseif (!is_array($options)) {
             // require_once 'Zend/Filter/Exception.php';
             throw new Zend_Filter_Exception('Invalid options argument provided to filter');
         }
 
         if (1 < func_num_args()) {
             $argv = func_get_args();
             array_shift($argv);
             $source    = array_shift($argv);
             $overwrite = false;
             if (!empty($argv)) {
                 $overwrite = array_shift($argv);
             }
             $options['source']    = $source;
             $options['overwrite'] = $overwrite;
         }
 
         $this->setFile($options);
     }
 
     /**
      * Returns the files to rename and their new name and location
      *
      * @return array
      */
     public function getFile()
     {
         return $this->_files;
     }
 
     /**
      * Sets a new file or directory as target, deleting existing ones
      *
      * Array accepts the following keys:
      * 'source'    => Source filename or directory which will be renamed
      * 'target'    => Target filename or directory, the new name of the sourcefile
      * 'overwrite' => Shall existing files be overwritten ?
      *
      * @param  string|array $options Old file or directory to be rewritten
      * @return Zend_Filter_File_Rename
      */
     public function setFile($options)
     {
         $this->_files = array();
         $this->addFile($options);
 
         return $this;
     }
 
     /**
      * Adds a new file or directory as target to the existing ones
      *
      * Array accepts the following keys:
      * 'source'    => Source filename or directory which will be renamed
      * 'target'    => Target filename or directory, the new name of the sourcefile
      * 'overwrite' => Shall existing files be overwritten ?
      *
      * @param  string|array $options Old file or directory to be rewritten
      * @return Zend_Filter_File_Rename
      */
     public function addFile($options)
     {
         if (is_string($options)) {
             $options = array('target' => $options);
         } elseif (!is_array($options)) {
             // require_once 'Zend/Filter/Exception.php';
             throw new Zend_Filter_Exception ('Invalid options to rename filter provided');
         }
 
         $this->_convertOptions($options);
 
         return $this;
     }
 
     /**
      * Returns only the new filename without moving it
      * But existing files will be erased when the overwrite option is true
      *
      * @param  string  $value  Full path of file to change
      * @param  boolean $source Return internal informations
      * @return string The new filename which has been set
      */
     public function getNewName($value, $source = false)
     {
         $file = $this->_getFileName($value);
         
         if (!is_array($file) || !array_key_exists('source', $file) || !array_key_exists('target', $file)) {
             return $value;
         }
         
         if ($file['source'] == $file['target']) {
             return $value;
         }
 
         if (!file_exists($file['source'])) {
             return $value;
         }
 
         if (($file['overwrite'] == true) && (file_exists($file['target']))) {
             unlink($file['target']);
         }
 
         if (file_exists($file['target'])) {
             // require_once 'Zend/Filter/Exception.php';
             throw new Zend_Filter_Exception(sprintf("File '%s' could not be renamed. It already exists.", $value));
         }
 
         if ($source) {
             return $file;
         }
 
         return $file['target'];
     }
 
     /**
      * Defined by Zend_Filter_Interface
      *
      * Renames the file $value to the new name set before
      * Returns the file $value, removing all but digit characters
      *
      * @param  string $value Full path of file to change
      * @throws Zend_Filter_Exception
      * @return string The new filename which has been set, or false when there were errors
      */
     public function filter($value)
     {
         $file   = $this->getNewName($value, true);
         if (is_string($file)) {
             return $file;
         }
 
         $result = rename($file['source'], $file['target']);
 
         if ($result === true) {
             return $file['target'];
         }
 
         // require_once 'Zend/Filter/Exception.php';
         throw new Zend_Filter_Exception(sprintf("File '%s' could not be renamed. An error occured while processing the file.", $value));
     }
 
     /**
      * Internal method for creating the file array
      * Supports single and nested arrays
      *
      * @param  array $options
      * @return array
      */
     protected function _convertOptions($options) {
         $files = array();
         foreach ($options as $key => $value) {
             if (is_array($value)) {
                 $this->_convertOptions($value);
                 continue;
             }
 
             switch ($key) {
                 case "source":
                     $files['source'] = (string) $value;
                     break;
 
                 case 'target' :
                     $files['target'] = (string) $value;
                     break;
 
                 case 'overwrite' :
                     $files['overwrite'] = (boolean) $value;
                     break;
 
                 default:
                     break;
             }
         }
 
         if (empty($files)) {
             return $this;
         }
 
         if (empty($files['source'])) {
             $files['source'] = '*';
         }
 
         if (empty($files['target'])) {
             $files['target'] = '*';
         }
 
         if (empty($files['overwrite'])) {
             $files['overwrite'] = false;
         }
 
         $found = false;
         foreach ($this->_files as $key => $value) {
             if ($value['source'] == $files['source']) {
                 $this->_files[$key] = $files;
                 $found              = true;
             }
         }
 
         if (!$found) {
             $count                = count($this->_files);
             $this->_files[$count] = $files;
         }
 
         return $this;
     }
 
     /**
      * Internal method to resolve the requested source
      * and return all other related parameters
      *
      * @param  string $file Filename to get the informations for
      * @return array
      */
     protected function _getFileName($file)
     {
         $rename = array();
         foreach ($this->_files as $value) {
             if ($value['source'] == '*') {
                 if (!isset($rename['source'])) {
                     $rename           = $value;
                     $rename['source'] = $file;
                 }
             }
 
             if ($value['source'] == $file) {
                 $rename = $value;
             }
         }
 
         if (!isset($rename['source'])) {
             return $file;
         }
 
         if (!isset($rename['target']) or ($rename['target'] == '*')) {
             $rename['target'] = $rename['source'];
         }
 
         if (is_dir($rename['target'])) {
             $name = basename($rename['source']);
             $last = $rename['target'][strlen($rename['target']) - 1];
             if (($last != '/') and ($last != '\\')) {
                 $rename['target'] .= DIRECTORY_SEPARATOR;
             }
 
             $rename['target'] .= $name;
         }
 
         return $rename;
     }
 }