Subversion Repositories SmartDukaan

<?php

/**

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @package       Cake.Utility

 * @since         CakePHP(tm) v 0.2.9

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

/**

 * Folder structure browser, lists folders and files.

 * Provides an Object interface for Common directory related tasks.

 *

 * @package       Cake.Utility

 */

class Folder {

/**

 * Default scheme for Folder::copy

 * Recursively merges subfolders with the same name

 *

 * @var string

 */

	const MERGE = 'merge';

/**

 * Overwrite scheme for Folder::copy

 * subfolders with the same name will be replaced

 *

 * @var string

 */

	const OVERWRITE = 'overwrite';

/**

 * Skip scheme for Folder::copy

 * if a subfolder with the same name exists it will be skipped

 *

 * @var string

 */

	const SKIP = 'skip';

/**

 * Path to Folder.

 *

 * @var string

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::$path

 */

	public $path = null;

/**

 * Sortedness. Whether or not list results

 * should be sorted by name.

 *

 * @var bool

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::$sort

 */

	public $sort = false;

/**

 * Mode to be used on create. Does nothing on Windows platforms.

 *

 * @var int

 * http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::$mode

 */

	public $mode = 0755;

/**

 * Holds messages from last method.

 *

 * @var array

 */

	protected $_messages = array();

/**

 * Holds errors from last method.

 *

 * @var array

 */

	protected $_errors = array();

/**

 * Holds array of complete directory paths.

 *

 * @var array

 */

	protected $_directories;

/**

 * Holds array of complete file paths.

 *

 * @var array

 */

	protected $_files;

/**

 * Constructor.

 *

 * @param string $path Path to folder

 * @param bool $create Create folder if not found

 * @param string|bool $mode Mode (CHMOD) to apply to created folder, false to ignore

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder

 */

	public function __construct($path = false, $create = false, $mode = false) {

		if (empty($path)) {

			$path = TMP;

		}

		if ($mode) {

			$this->mode = $mode;

		}

		if (!file_exists($path) && $create === true) {

			$this->create($path, $this->mode);

		}

		if (!Folder::isAbsolute($path)) {

			$path = realpath($path);

		}

		if (!empty($path)) {

			$this->cd($path);

		}

	}

/**

 * Return current path.

 *

 * @return string Current path

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::pwd

 */

	public function pwd() {

		return $this->path;

	}

/**

 * Change directory to $path.

 *

 * @param string $path Path to the directory to change to

 * @return string The new path. Returns false on failure

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::cd

 */

	public function cd($path) {

		$path = $this->realpath($path);

		if (is_dir($path)) {

			return $this->path = $path;

		}

		return false;

	}

/**

 * Returns an array of the contents of the current directory.

 * The returned array holds two arrays: One of directories and one of files.

 *

 * @param bool $sort Whether you want the results sorted, set this and the sort property

 *   to false to get unsorted results.

 * @param array|bool $exceptions Either an array or boolean true will not grab dot files

 * @param bool $fullPath True returns the full path

 * @return mixed Contents of current directory as an array, an empty array on failure

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::read

 */

	public function read($sort = true, $exceptions = false, $fullPath = false) {

		$dirs = $files = array();

		if (!$this->pwd()) {

			return array($dirs, $files);

		}

		if (is_array($exceptions)) {

			$exceptions = array_flip($exceptions);

		}

		$skipHidden = isset($exceptions['.']) || $exceptions === true;

		try {

			$iterator = new DirectoryIterator($this->path);

		} catch (Exception $e) {

			return array($dirs, $files);

		}

		foreach ($iterator as $item) {

			if ($item->isDot()) {

				continue;

			}

			$name = $item->getFileName();

			if ($skipHidden && $name[0] === '.' || isset($exceptions[$name])) {

				continue;

			}

			if ($fullPath) {

				$name = $item->getPathName();

			}

			if ($item->isDir()) {

				$dirs[] = $name;

			} else {

				$files[] = $name;

			}

		}

		if ($sort || $this->sort) {

			sort($dirs);

			sort($files);

		}

		return array($dirs, $files);

	}

/**

 * Returns an array of all matching files in current directory.

 *

 * @param string $regexpPattern Preg_match pattern (Defaults to: .*)

 * @param bool $sort Whether results should be sorted.

 * @return array Files that match given pattern

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::find

 */

	public function find($regexpPattern = '.*', $sort = false) {

		list(, $files) = $this->read($sort);

		return array_values(preg_grep('/^' . $regexpPattern . '$/i', $files));

	}

/**

 * Returns an array of all matching files in and below current directory.

 *

 * @param string $pattern Preg_match pattern (Defaults to: .*)

 * @param bool $sort Whether results should be sorted.

 * @return array Files matching $pattern

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::findRecursive

 */

	public function findRecursive($pattern = '.*', $sort = false) {

		if (!$this->pwd()) {

			return array();

		}

		$startsOn = $this->path;

		$out = $this->_findRecursive($pattern, $sort);

		$this->cd($startsOn);

		return $out;

	}

/**

 * Private helper function for findRecursive.

 *

 * @param string $pattern Pattern to match against

 * @param bool $sort Whether results should be sorted.

 * @return array Files matching pattern

 */

	protected function _findRecursive($pattern, $sort = false) {

		list($dirs, $files) = $this->read($sort);

		$found = array();

		foreach ($files as $file) {

			if (preg_match('/^' . $pattern . '$/i', $file)) {

				$found[] = Folder::addPathElement($this->path, $file);

			}

		}

		$start = $this->path;

		foreach ($dirs as $dir) {

			$this->cd(Folder::addPathElement($start, $dir));

			$found = array_merge($found, $this->findRecursive($pattern, $sort));

		}

		return $found;

	}

/**

 * Returns true if given $path is a Windows path.

 *

 * @param string $path Path to check

 * @return bool true if Windows path, false otherwise

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::isWindowsPath

 */

	public static function isWindowsPath($path) {

		return (preg_match('/^[A-Z]:\\\\/i', $path) || substr($path, 0, 2) === '\\\\');

	}

/**

 * Returns true if given $path is an absolute path.

 *

 * @param string $path Path to check

 * @return bool true if path is absolute.

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::isAbsolute

 */

	public static function isAbsolute($path) {

		if (empty($path)) {

			return false;

		}

		return $path[0] === '/' ||

			preg_match('/^[A-Z]:\\\\/i', $path) ||

			substr($path, 0, 2) === '\\\\' ||

			static::isRegisteredStreamWrapper($path);

	}

/**

 * Returns true if given $path is a registered stream wrapper.

 *

 * @param string $path Path to check

 * @return boo true If path is registered stream wrapper.

 */

	public static function isRegisteredStreamWrapper($path) {

		if (preg_match('/^[A-Z]+(?=:\/\/)/i', $path, $matches) &&

			in_array($matches[0], stream_get_wrappers())

		) {

			return true;

		}

		return false;

	}

/**

 * Returns a correct set of slashes for given $path. (\\ for Windows paths and / for other paths.)

 *

 * @param string $path Path to check

 * @return string Set of slashes ("\\" or "/")

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::normalizePath

 */

	public static function normalizePath($path) {

		return Folder::correctSlashFor($path);

	}

/**

 * Returns a correct set of slashes for given $path. (\\ for Windows paths and / for other paths.)

 *

 * @param string $path Path to check

 * @return string Set of slashes ("\\" or "/")

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::correctSlashFor

 */

	public static function correctSlashFor($path) {

		return (Folder::isWindowsPath($path)) ? '\\' : '/';

	}

/**

 * Returns $path with added terminating slash (corrected for Windows or other OS).

 *

 * @param string $path Path to check

 * @return string Path with ending slash

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::slashTerm

 */

	public static function slashTerm($path) {

		if (Folder::isSlashTerm($path)) {

			return $path;

		}

		return $path . Folder::correctSlashFor($path);

	}

/**

 * Returns $path with $element added, with correct slash in-between.

 *

 * @param string $path Path

 * @param string|array $element Element to add at end of path

 * @return string Combined path

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::addPathElement

 */

	public static function addPathElement($path, $element) {

		$element = (array)$element;

		array_unshift($element, rtrim($path, DS));

		return implode(DS, $element);

	}

/**

 * Returns true if the File is in a given CakePath.

 *

 * @param string $path The path to check.

 * @return bool

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::inCakePath

 */

	public function inCakePath($path = '') {

		$dir = substr(Folder::slashTerm(ROOT), 0, -1);

		$newdir = $dir . $path;

		return $this->inPath($newdir);

	}

/**

 * Returns true if the File is in given path.

 *

 * @param string $path The path to check that the current pwd() resides with in.

 * @param bool $reverse Reverse the search, check that pwd() resides within $path.

 * @return bool

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::inPath

 */

	public function inPath($path = '', $reverse = false) {

		$dir = Folder::slashTerm($path);

		$current = Folder::slashTerm($this->pwd());

		if (!$reverse) {

			$return = preg_match('/^(.*)' . preg_quote($dir, '/') . '(.*)/', $current);

		} else {

			$return = preg_match('/^(.*)' . preg_quote($current, '/') . '(.*)/', $dir);

		}

		return (bool)$return;

	}

/**

 * Change the mode on a directory structure recursively. This includes changing the mode on files as well.

 *

 * @param string $path The path to chmod.

 * @param int $mode Octal value, e.g. 0755.

 * @param bool $recursive Chmod recursively, set to false to only change the current directory.

 * @param array $exceptions Array of files, directories to skip.

 * @return bool Success.

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::chmod

 */

	public function chmod($path, $mode = false, $recursive = true, $exceptions = array()) {

		if (!$mode) {

			$mode = $this->mode;

		}

		if ($recursive === false && is_dir($path)) {

			//@codingStandardsIgnoreStart

			if (@chmod($path, intval($mode, 8))) {

				//@codingStandardsIgnoreEnd

				$this->_messages[] = __d('cake_dev', '%s changed to %s', $path, $mode);

				return true;

			}

			$this->_errors[] = __d('cake_dev', '%s NOT changed to %s', $path, $mode);

			return false;

		}

		if (is_dir($path)) {

			$paths = $this->tree($path);

			foreach ($paths as $type) {

				foreach ($type as $fullpath) {

					$check = explode(DS, $fullpath);

					$count = count($check);

					if (in_array($check[$count - 1], $exceptions)) {

						continue;

					}

					//@codingStandardsIgnoreStart

					if (@chmod($fullpath, intval($mode, 8))) {

						//@codingStandardsIgnoreEnd

						$this->_messages[] = __d('cake_dev', '%s changed to %s', $fullpath, $mode);

					} else {

						$this->_errors[] = __d('cake_dev', '%s NOT changed to %s', $fullpath, $mode);

					}

				}

			}

			if (empty($this->_errors)) {

				return true;

			}

		}

		return false;

	}

/**

 * Returns an array of nested directories and files in each directory

 *

 * @param string $path the directory path to build the tree from

 * @param array|bool $exceptions Either an array of files/folder to exclude

 *   or boolean true to not grab dot files/folders

 * @param string $type either 'file' or 'dir'. null returns both files and directories

 * @return mixed array of nested directories and files in each directory

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::tree

 */

	public function tree($path = null, $exceptions = false, $type = null) {

		if (!$path) {

			$path = $this->path;

		}

		$files = array();

		$directories = array($path);

		if (is_array($exceptions)) {

			$exceptions = array_flip($exceptions);

		}

		$skipHidden = false;

		if ($exceptions === true) {

			$skipHidden = true;

		} elseif (isset($exceptions['.'])) {

			$skipHidden = true;

			unset($exceptions['.']);

		}

		try {

			$directory = new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::KEY_AS_PATHNAME | RecursiveDirectoryIterator::CURRENT_AS_SELF);

			$iterator = new RecursiveIteratorIterator($directory, RecursiveIteratorIterator::SELF_FIRST);

		} catch (Exception $e) {

			if ($type === null) {

				return array(array(), array());

			}

			return array();

		}

		foreach ($iterator as $itemPath => $fsIterator) {

			if ($skipHidden) {

				$subPathName = $fsIterator->getSubPathname();

				if ($subPathName{0} === '.' || strpos($subPathName, DS . '.') !== false) {

					continue;

				}

			}

			$item = $fsIterator->current();

			if (!empty($exceptions) && isset($exceptions[$item->getFilename()])) {

				continue;

			}

			if ($item->isFile()) {

				$files[] = $itemPath;

			} elseif ($item->isDir() && !$item->isDot()) {

				$directories[] = $itemPath;

			}

		}

		if ($type === null) {

			return array($directories, $files);

		}

		if ($type === 'dir') {

			return $directories;

		}

		return $files;

	}

/**

 * Create a directory structure recursively.

 *

 * Can be used to create deep path structures like `/foo/bar/baz/shoe/horn`

 *

 * @param string $pathname The directory structure to create. Either an absolute or relative

 *   path. If the path is relative and exists in the process' cwd it will not be created.

 *   Otherwise relative paths will be prefixed with the current pwd().

 * @param int $mode octal value 0755

 * @return bool Returns TRUE on success, FALSE on failure

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::create

 */

	public function create($pathname, $mode = false) {

		if (is_dir($pathname) || empty($pathname)) {

			return true;

		}

		if (!static::isAbsolute($pathname)) {

			$pathname = static::addPathElement($this->pwd(), $pathname);

		}

		if (!$mode) {

			$mode = $this->mode;

		}

		if (is_file($pathname)) {

			$this->_errors[] = __d('cake_dev', '%s is a file', $pathname);

			return false;

		}

		$pathname = rtrim($pathname, DS);

		$nextPathname = substr($pathname, 0, strrpos($pathname, DS));

		if ($this->create($nextPathname, $mode)) {

			if (!file_exists($pathname)) {

				$old = umask(0);

				if (mkdir($pathname, $mode)) {

					umask($old);

					$this->_messages[] = __d('cake_dev', '%s created', $pathname);

					return true;

				}

				umask($old);

				$this->_errors[] = __d('cake_dev', '%s NOT created', $pathname);

				return false;

			}

		}

		return false;

	}

/**

 * Returns the size in bytes of this Folder and its contents.

 *

 * @return int size in bytes of current folder

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::dirsize

 */

	public function dirsize() {

		$size = 0;

		$directory = Folder::slashTerm($this->path);

		$stack = array($directory);

		$count = count($stack);

		for ($i = 0, $j = $count; $i < $j; ++$i) {

			if (is_file($stack[$i])) {

				$size += filesize($stack[$i]);

			} elseif (is_dir($stack[$i])) {

				$dir = dir($stack[$i]);

				if ($dir) {

					while (false !== ($entry = $dir->read())) {

						if ($entry === '.' || $entry === '..') {

							continue;

						}

						$add = $stack[$i] . $entry;

						if (is_dir($stack[$i] . $entry)) {

							$add = Folder::slashTerm($add);

						}

						$stack[] = $add;

					}

					$dir->close();

				}

			}

			$j = count($stack);

		}

		return $size;

	}

/**

 * Recursively Remove directories if the system allows.

 *

 * @param string $path Path of directory to delete

 * @return bool Success

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::delete

 */

	public function delete($path = null) {

		if (!$path) {

			$path = $this->pwd();

		}

		if (!$path) {

			return false;

		}

		$path = Folder::slashTerm($path);

		if (is_dir($path)) {

			try {

				$directory = new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::CURRENT_AS_SELF);

				$iterator = new RecursiveIteratorIterator($directory, RecursiveIteratorIterator::CHILD_FIRST);

			} catch (Exception $e) {

				return false;

			}

			foreach ($iterator as $item) {

				$filePath = $item->getPathname();

				if ($item->isFile() || $item->isLink()) {

					//@codingStandardsIgnoreStart

					if (@unlink($filePath)) {

						//@codingStandardsIgnoreEnd

						$this->_messages[] = __d('cake_dev', '%s removed', $filePath);

					} else {

						$this->_errors[] = __d('cake_dev', '%s NOT removed', $filePath);

					}

				} elseif ($item->isDir() && !$item->isDot()) {

					//@codingStandardsIgnoreStart

					if (@rmdir($filePath)) {

						//@codingStandardsIgnoreEnd

						$this->_messages[] = __d('cake_dev', '%s removed', $filePath);

					} else {

						$this->_errors[] = __d('cake_dev', '%s NOT removed', $filePath);

						return false;

					}

				}

			}

			$path = rtrim($path, DS);

			//@codingStandardsIgnoreStart

			if (@rmdir($path)) {

				//@codingStandardsIgnoreEnd

				$this->_messages[] = __d('cake_dev', '%s removed', $path);

			} else {

				$this->_errors[] = __d('cake_dev', '%s NOT removed', $path);

				return false;

			}

		}

		return true;

	}

/**

 * Recursive directory copy.

 *

 * ### Options

 *

 * - `to` The directory to copy to.

 * - `from` The directory to copy from, this will cause a cd() to occur, changing the results of pwd().

 * - `mode` The mode to copy the files/directories with as integer, e.g. 0775.

 * - `skip` Files/directories to skip.

 * - `scheme` Folder::MERGE, Folder::OVERWRITE, Folder::SKIP

 *

 * @param array|string $options Either an array of options (see above) or a string of the destination directory.

 * @return bool Success.

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::copy

 */

	public function copy($options) {

		if (!$this->pwd()) {

			return false;

		}

		$to = null;

		if (is_string($options)) {

			$to = $options;

			$options = array();

		}

		$options += array(

			'to' => $to,

			'from' => $this->path,

			'mode' => $this->mode,

			'skip' => array(),

			'scheme' => Folder::MERGE

		);

		$fromDir = $options['from'];

		$toDir = $options['to'];

		$mode = $options['mode'];

		if (!$this->cd($fromDir)) {

			$this->_errors[] = __d('cake_dev', '%s not found', $fromDir);

			return false;

		}

		if (!is_dir($toDir)) {

			$this->create($toDir, $mode);

		}

		if (!is_writable($toDir)) {

			$this->_errors[] = __d('cake_dev', '%s not writable', $toDir);

			return false;

		}

		$exceptions = array_merge(array('.', '..', '.svn'), $options['skip']);

		//@codingStandardsIgnoreStart

		if ($handle = @opendir($fromDir)) {

			//@codingStandardsIgnoreEnd

			while (($item = readdir($handle)) !== false) {

				$to = Folder::addPathElement($toDir, $item);

				if (($options['scheme'] != Folder::SKIP || !is_dir($to)) && !in_array($item, $exceptions)) {

					$from = Folder::addPathElement($fromDir, $item);

					if (is_file($from) && (!is_file($to) || $options['scheme'] != Folder::SKIP)) {

						if (copy($from, $to)) {

							chmod($to, intval($mode, 8));

							touch($to, filemtime($from));

							$this->_messages[] = __d('cake_dev', '%s copied to %s', $from, $to);

						} else {

							$this->_errors[] = __d('cake_dev', '%s NOT copied to %s', $from, $to);

						}

					}

					if (is_dir($from) && file_exists($to) && $options['scheme'] === Folder::OVERWRITE) {

						$this->delete($to);

					}

					if (is_dir($from) && !file_exists($to)) {

						$old = umask(0);

						if (mkdir($to, $mode)) {

							umask($old);

							$old = umask(0);

							chmod($to, $mode);

							umask($old);

							$this->_messages[] = __d('cake_dev', '%s created', $to);

							$options = array('to' => $to, 'from' => $from) + $options;

							$this->copy($options);

						} else {

							$this->_errors[] = __d('cake_dev', '%s not created', $to);

						}

					} elseif (is_dir($from) && $options['scheme'] === Folder::MERGE) {

						$options = array('to' => $to, 'from' => $from) + $options;

						$this->copy($options);

					}

				}

			}

			closedir($handle);

		} else {

			return false;

		}

		if (!empty($this->_errors)) {

			return false;

		}

		return true;

	}

/**

 * Recursive directory move.

 *

 * ### Options

 *

 * - `to` The directory to copy to.

 * - `from` The directory to copy from, this will cause a cd() to occur, changing the results of pwd().

 * - `chmod` The mode to copy the files/directories with.

 * - `skip` Files/directories to skip.

 * - `scheme` Folder::MERGE, Folder::OVERWRITE, Folder::SKIP

 *

 * @param array $options (to, from, chmod, skip, scheme)

 * @return bool Success

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::move

 */

	public function move($options) {

		$to = null;

		if (is_string($options)) {

			$to = $options;

			$options = (array)$options;

		}

		$options += array('to' => $to, 'from' => $this->path, 'mode' => $this->mode, 'skip' => array());

		if ($this->copy($options)) {

			if ($this->delete($options['from'])) {

				return (bool)$this->cd($options['to']);

			}

		}

		return false;

	}

/**

 * get messages from latest method

 *

 * @param bool $reset Reset message stack after reading

 * @return array

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::messages

 */

	public function messages($reset = true) {

		$messages = $this->_messages;

		if ($reset) {

			$this->_messages = array();

		}

		return $messages;

	}

/**

 * get error from latest method

 *

 * @param bool $reset Reset error stack after reading

 * @return array

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::errors

 */

	public function errors($reset = true) {

		$errors = $this->_errors;

		if ($reset) {

			$this->_errors = array();

		}

		return $errors;

	}

/**

 * Get the real path (taking ".." and such into account)

 *

 * @param string $path Path to resolve

 * @return string The resolved path

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::realpath

 */

	public function realpath($path) {

		$path = str_replace('/', DS, trim($path));

		if (strpos($path, '..') === false) {

			if (!Folder::isAbsolute($path)) {

				$path = Folder::addPathElement($this->path, $path);

			}

			return $path;

		}

		$parts = explode(DS, $path);

		$newparts = array();

		$newpath = '';

		if ($path[0] === DS) {

			$newpath = DS;

		}

		while (($part = array_shift($parts)) !== null) {

			if ($part === '.' || $part === '') {

				continue;

			}

			if ($part === '..') {

				if (!empty($newparts)) {

					array_pop($newparts);

					continue;

				}

				return false;

			}

			$newparts[] = $part;

		}

		$newpath .= implode(DS, $newparts);

		return Folder::slashTerm($newpath);

	}

/**

 * Returns true if given $path ends in a slash (i.e. is slash-terminated).

 *

 * @param string $path Path to check

 * @return bool true if path ends with slash, false otherwise

 * @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::isSlashTerm

 */

	public static function isSlashTerm($path) {

		$lastChar = $path[strlen($path) - 1];

		return $lastChar === '/' || $lastChar === '\\';

	}

}