<?php

/**

 * Class to operate the file system

 * 

 * Unix only

 * 

 * @todo Add windows system support

 * @author V team

 * @category Components

 * @package vbilling.core.components

 * @subpackage core

 * @version 0.0.2

 */

 

namespace VLibrary\Core;



use \Exception;



class FileSystem 

{

	

	/**

	 * @var переменная будет содержать в массиве другие переменные необходимые для передачи 

	 * */

	private $_localStorage = array();



	/**

	 * scan directory and return array 

	 * ('files' => $files, 'dirs' => $dirs)

	 * 

	 * @todo recursive

	 * 

	 * @access 		public

	 * @param 		string 		directory path

	 * @return 		array 		see header 	

	 * */

	public function scanDir($dirPath)

	{

		$path = realpath($dirPath);

		$path = $path;

		$files = array();

		$filesInfo = array();

		$directory = array();

			

		if ($fp = @opendir($path))

		{

			while (FALSE !== ($file = readdir($fp)))

			{

				

				if (is_dir($path.DIRECTORY_SEPARATOR.$file) && strncmp($file, '.', 1) !== 0)

				{

					$directory[] = $file;

				}

				elseif (strncmp($file, '.', 1) !== 0)

				{

					$files[] = $file;

					$filesInfo[$file] = $this -> getFileInfo($path.DIRECTORY_SEPARATOR.$file);

				}

			}

			return array('files' => $files,'dirs' => $directory,'filesinfo' => $filesInfo);

		}

		else

		{

			return FALSE;

		}

	

	}



	/**

	 * give a file info 

	 * 

	 * @access public 

	 * @param 	string		path to file

	 * @param	array 		return file param array

	 * @return	array 		file info array

	 * */	

	public function getFileInfo($filePath, $returned_values = array('name', 'server_path', 'size', 'date'))

	{



		if ( ! file_exists($filePath))

			throw new Exception("file '$filePath' not found ");
		if (is_string($returned_values))

			$returned_values = explode(',', $returned_values);

		foreach ($returned_values as $key)

		{

			switch ($key)

			{

				case 'name':

					$fileinfo['name'] = substr(strrchr($filePath, DIRECTORY_SEPARATOR), 1);

					break;

				case 'server_path':

					$fileinfo['server_path'] = $filePath;

					break;

				case 'size':

					$fileinfo['size'] = filesize($filePath);

					break;

				case 'date':

					$fileinfo['date'] = filemtime($filePath);

					break;

				case 'readable':

					$fileinfo['readable'] = is_readable($filePath);

					break;

				case 'writable':

					// There are known problems using is_weritable on IIS.  It may not be reliable - consider fileperms()

					$fileinfo['writable'] = is_writable($filePath);

					break;

				case 'executable':

					$fileinfo['executable'] = is_executable($filePath);

					break;

				case 'fileperms':

					$fileinfo['fileperms'] = fileperms($filePath);

					break;

			}

		}

		return $fileinfo;

	}

	

	/**

	 * Convert byte to round byte system

	 * 

	 * @access public

	 * @param 	string 	bytes

	 * @param   int		precision

	 * @return  string		true or false

	 * */

	function roundFileSize($bytes, $precision = 2) {

	    $units = array('B', 'KB', 'MB', 'GB', 'TB');

	    $bytes = max($bytes, 0);

	    $pow = floor(($bytes?log($bytes):0)/log(1024));

	    $pow = min($pow, count($units)-1);

	    $bytes /= pow(1024, $pow);

	    return round($bytes, $precision).' '.$units[$pow];

	}



	/**

	 * Return extension of a file name

	 * 

	 * @access public

	 * @param 	string 	file name

	 * @return  bool 	true or false

	 * */

	public function getFileExtension($fileName)

	{

		$_filename_array = explode('.', $filename);

		if (count($_filename_array)>1)

			return end($_filename_array);

		else

			return '';

	}

	

	

	/**

	 * Checks Correctly file name

	 * 

	 * @access public

	 * @param 	string 	file name

	 * @return  bool 	true or false

	 * */

	public function chackFileName($fileName)

	{

		if (preg_match("/(^[a-zA-Z0-9]+([a-zA-Z\_0-9\.-]*))$/" , $fileName) AND strlen($fileName) < 255)

			return TRUE;

		else

			return FALSE;

	}

	

}