<?php
/**
 *	Filemanager PHP class
 *
 *	filemanager.class.php
 *	class for the filemanager.php connector
 *
 *	@license	MIT License
 *	@author		Riaan Los <mail (at) riaanlos (dot) nl>
 *	@author		Simon Georget <simon (at) linea21 (dot) com>
 *	@copyright	Authors
 */

require_once('./inc/intervention/vendor/autoload.php');
// import the Intervention Image Manager Class
use Intervention\Image\ImageManagerStatic as Image;

class Filemanager {

	protected $config = array();
	protected $language = array();
	protected $get = array();
	protected $post = array();
	protected $properties = array();
	protected $item = array();
	protected $languages = array();
	protected $allowed_actions = array();
	protected $root = '';				// Filemanager root folder
	protected $doc_root = '';		// root folder known by JS : $this->config['options']['fileRoot'] (filepath or '/') or $_SERVER['DOCUMENT_ROOT'] - overwritten by setFileRoot() method
	protected $dynamic_fileroot = ''; // Only set if setFileRoot() is called. Second part of the path : '/Filemanager/assets/' ( doc_root - $_SERVER['DOCUMENT_ROOT'])
	protected $path_to_files = ''; // path to FM userfiles folder - automatically computed by the PHP class, something like '/var/www/Filemanager/userfiles'
	protected $logger = false;
	protected $logfile = '';
	protected $cachefolder = '_thumbs/';
	protected $thumbnail_width = 64;
	protected $thumbnail_height = 64;
	protected $separator = 'userfiles'; // @todo fix keep it or not?

	public function __construct($extraConfig = '') {
		
		// getting default config file
		$content = file_get_contents("../../scripts/filemanager.config.default.json");
		$config_default = json_decode($content, true);
		
		// getting user config file
		if(isset($_REQUEST['config'])) {
			$this->getvar('config');
			if (file_exists("../../scripts/" . $_REQUEST['config'])) {
				$this->__log('Loading ' . basename($this->get['config']) . ' config file.');
				$content = file_get_contents("../../scripts/" . basename($this->get['config']));
			} else {
				$this->__log($this->get['config'] . ' config file does not exists.');
				$this->error("Given config file (".basename($this->get['config']).") does not exist !");
			}
		}	else {
			$content = file_get_contents("../../scripts/filemanager.config.json");
		}
		$config = json_decode($content, true);
		
		setlocale(LC_ALL, 'en_US.UTF-8'); // this would fix bug on encoding https://github.com/simogeo/Filemanager/issues/474#issuecomment-214781921 @todo make this dynamic with config json file
		
		// Prevent following bug https://github.com/simogeo/Filemanager/issues/398
		$config_default['security']['uploadRestrictions'] = array();
		
		if(!$config) {
			$this->error("Error parsing the settings file! Please check your JSON syntax.");
		}
		$this->config = array_replace_recursive ($config_default, $config);

		// override config options if needed
		if(!empty($extraConfig)) {
			$this->setup($extraConfig);
		}
		
		// set logfile path according to system if not set into config file
		if(!isset($this->config['options']['logfile']))
			$this->config['options']['logfile'] = sys_get_temp_dir(). '/filemanager.log';

		$this->root = dirname(dirname(dirname(__FILE__))).DIRECTORY_SEPARATOR;
		$this->properties = array(
				'Date Created'=>null,
				'Date Modified'=>null,
				'Height'=>null,
				'Width'=>null,
				'Size'=>null
		);

		// Log actions or not?
		if ($this->config['options']['logger'] == true ) {
			if(isset($this->config['options']['logfile'])) {
				$this->logfile = $this->config['options']['logfile'];
			}
			$this->enableLog();
		}

		// if fileRoot is set manually, $this->doc_root takes fileRoot value
		// for security check in is_valid_path() method
		// else it takes $_SERVER['DOCUMENT_ROOT'] default value
		if ($this->config['options']['fileRoot'] !== false ) {
			if($this->config['options']['serverRoot'] === true) {
				$this->doc_root = $_SERVER['DOCUMENT_ROOT'];
				$this->separator = basename($this->config['options']['fileRoot']);
				$this->path_to_files = $_SERVER['DOCUMENT_ROOT'] .'/' . $this->config['options']['fileRoot'];
			} else {
				$this->doc_root = $this->config['options']['fileRoot'];
				$this->separator = basename($this->config['options']['fileRoot']);
				$this->path_to_files = $this->config['options']['fileRoot'];
			}
		} else {
			$this->doc_root = $_SERVER['DOCUMENT_ROOT'];
			$this->path_to_files = $this->root . $this->separator .'/' ;
		}

		$this->__log(__METHOD__ . ' $this->root value ' . $this->root);
		$this->__log(__METHOD__ . ' $this->path_to_files ' . $this->path_to_files);
		$this->__log(__METHOD__ . ' $this->doc_root value ' . $this->doc_root);
		$this->__log(__METHOD__ . ' $this->separator value ' . $this->separator);

		$this->setParams();
		$this->setPermissions();
		$this->availableLanguages();
		$this->loadLanguageFile();
	}

	// $extraconfig should be formatted as json config array.
	public function setup($extraconfig) {

		// Prevent following bug https://github.com/simogeo/Filemanager/issues/398
		$config_default['security']['uploadRestrictions'] = array();
		
		$this->config = array_replace_recursive($this->config, $extraconfig);
			
	}

	// allow Filemanager to be used with dynamic folders
	public function setFileRoot($path, $mkdir = false) {

		// Paths are bit complex to handle - kind of nightmare actually ....
		// 3 parts are availables
		// [1] $this->doc_root. The first part of the path : '/var/www'
		// [2] $this->dynamic_fileroot. The second part of the path : '/Filemanager/assets/' ( doc_root - $_SERVER['DOCUMENT_ROOT'])
		// [3] $this->path_to_files or $this->doc_root. The full path : '/var/www/Filemanager/assets/'
		
		$path = rtrim($path, '/') . '/';
		if($this->config['options']['serverRoot'] === true) {
			$this->doc_root = $_SERVER['DOCUMENT_ROOT']. '/'.  $path; // i.e  '/var/www/'
		} else {
			$this->doc_root =  $path; // i.e  '/var/www/'
		}
		
		// necessary for retrieving path when set dynamically with $fm->setFileRoot() method
		// https://github.com/simogeo/Filemanager/issues/258 @todo to explore deeper
		$this->dynamic_fileroot = str_replace("//","/",str_replace($_SERVER['DOCUMENT_ROOT'], '', $this->doc_root));
		$this->path_to_files = $this->doc_root;
		$this->separator = basename($this->doc_root);
		
		// do we create folder ?
		if($mkdir && !file_exists($this->doc_root)) {
			mkdir($this->doc_root, 0755, true);
			$this->__log(__METHOD__ . ' creating  ' . $this->doc_root. ' folder through mkdir()');
		}
		
		$this->__log(__METHOD__ . ' $this->doc_root value overwritten : ' . $this->doc_root);
		$this->__log(__METHOD__ . ' $this->dynamic_fileroot value ' . $this->dynamic_fileroot);
		$this->__log(__METHOD__ . ' $this->path_to_files ' . $this->path_to_files);
		$this->__log(__METHOD__ . ' $this->separator value ' . $this->separator);
	}

	public function error($string,$textarea=false) {
		$array = array(
				'Error'=>$string,
				'Code'=>'-1',
				'Properties'=>$this->properties
		);

		$this->__log( __METHOD__ . ' - error message : ' . $string);

		if($textarea) {
			echo '<textarea>' . json_encode($array) . '</textarea>';
		} else {
			echo json_encode($array);
		}
		die();
	}

	public function lang($string) {
		if(isset($this->language[$string]) && $this->language[$string]!='') {
			return $this->language[$string];
		} else {
			return 'Language string error on ' . $string;
		}
	}

	public function getvar($var, $sanitize = true) {
		if(!isset($_GET[$var]) || $_GET[$var]=='') {
			$this->error(sprintf($this->lang('INVALID_VAR'),$var));
		} else {
			if($sanitize) {
				$this->get[$var] = $this->sanitize($_GET[$var]);
			} else {
				$this->get[$var] = $_GET[$var];
			}
			return true;
		}
	}
	public function postvar($var, $sanitize = true) {
		if(!isset($_POST[$var]) || ($var != 'content' && $_POST[$var]=='')) {
			$this->error(sprintf($this->lang('INVALID_VAR'),$var));
		} else {
			if($sanitize) {
				$this->post[$var] = $this->sanitize($_POST[$var]);
			} else {
				$this->post[$var] = $_POST[$var];
			}
			return true;
		}
	}

	public function getinfo() {
		$this->item = array();
		$this->item['properties'] = $this->properties;
		$this->get_file_info('', false);
		
		// handle path when set dynamically with $fm->setFileRoot() method
		if($this->dynamic_fileroot != '') {
			$path = $this->dynamic_fileroot. $this->get['path'];
			// $path = str_replace($_SERVER['DOCUMENT_ROOT'], '', $this->path_to_files) . $this->get['path']; // instruction could replace the line above
			$path = preg_replace('~/+~', '/', $path); // remove multiple slashes
		} else {
			$path = $this->get['path'];
		}
		
		$array = array(
				'Path'=> $path,
				'Filename'=>$this->item['filename'],
				'File Type'=>$this->item['filetype'],
				'Protected'=>$this->item['protected'],
				'Preview'=>$this->item['preview'],
				'Properties'=>$this->item['properties'],
				'Error'=>"",
				'Code'=>0
		);
		return $array;
	}

	public function getfolder() {
		$array = array();
		$filesDir = array();

		$current_path = $this->getFullPath();


		if(!$this->is_valid_path($current_path)) {
			$this->error("No way.");
		}
		
		if(!is_dir($current_path)) {
			$this->error(sprintf($this->lang('DIRECTORY_NOT_EXIST'),$this->get['path']));
		}
		
		// check if file is readable
		if(!$this->has_system_permission($current_path, array('r'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')));
		}
		
		if(!$handle = @opendir($current_path)) {
			$this->error(sprintf($this->lang('UNABLE_TO_OPEN_DIRECTORY'),$this->get['path']));
		} else {
			while (false !== ($file = readdir($handle))) {
				if($file != "." && $file != "..") {
					array_push($filesDir, $file);
				}
			}
			closedir($handle);
			
			// By default
			// Sorting files by name ('default' or 'NAME_DESC' cases from $this->config['options']['fileSorting']
			natcasesort($filesDir);

			foreach($filesDir as $file) {
				
				if(is_dir($current_path . $file)) {
					if(!in_array($file, $this->config['exclude']['unallowed_dirs']) && !preg_match( $this->config['exclude']['unallowed_dirs_REGEXP'], $file)) {
						
						// check if file is writable and readable
						if(!$this->has_system_permission($current_path . $file, array('w', 'r'))) {
							$protected = 1;
							$previewPath = $this->config['icons']['path'] . 'locked_' . $this->config['icons']['directory'];
						} else {
							$protected =0;
							$previewPath = $this->config['icons']['path'] . $this->config['icons']['directory'];
						}
						
						$array[$this->get['path'] . $file .'/'] = array(
								'Path'=> $this->get['path'] . $file .'/',
								'Filename'=>$file,
								'File Type'=>'dir',
								'Protected'=>$protected,
								'Preview'=> $previewPath,
								'Properties'=>array(
										'Date Created'=> date($this->config['options']['dateFormat'], filectime($this->getFullPath($this->get['path'] . $file .'/'))),
										'Date Modified'=> date($this->config['options']['dateFormat'], filemtime($this->getFullPath($this->get['path'] . $file .'/'))),
										'filemtime'=> filemtime($this->getFullPath($this->get['path'] . $file .'/')),
										'Height'=>null,
										'Width'=>null,
										'Size'=>null
								),
								'Error'=>"",
								'Code'=>0
						);
					}
				} else if (!in_array($file, $this->config['exclude']['unallowed_files'])  && !preg_match( $this->config['exclude']['unallowed_files_REGEXP'], $file)) {
					$this->item = array();
					$this->item['properties'] = $this->properties;
					$this->get_file_info($this->get['path'] . $file, true);
					

					if(!isset($this->params['type']) || (isset($this->params['type']) && strtolower($this->params['type'])=='images' && in_array(strtolower($this->item['filetype']),array_map('strtolower', $this->config['images']['imagesExt'])))) {
						if($this->config['upload']['imagesOnly']== false || ($this->config['upload']['imagesOnly']== true && in_array(strtolower($this->item['filetype']),array_map('strtolower', $this->config['images']['imagesExt'])))) {
							$array[$this->get['path'] . $file] = array(
									'Path'=>$this->get['path'] . $file,
									'Filename'=>$this->item['filename'],
									'File Type'=>$this->item['filetype'],
									'Protected'=>$this->item['protected'],
									'Preview'=>$this->item['preview'],
									'Properties'=>$this->item['properties'],
									'Error'=>"",
									'Code'=>0
							);
						}
					}
				}
			}
		}
		
		$array = $this->sortFiles($array);

		return $array;
	}
	
	
	public function editfile() {

		$current_path = $this->getFullPath();
		
		// prevent editing .htaccess file
		if(strpos($current_path, '.htaccess')  !== false) $this->error("No way.");
		
		// check if file is writable
		if(!$this->has_system_permission($current_path, array('w'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')));
		}
		
		if(!$this->has_permission('edit') || !$this->is_valid_path($current_path) || !$this->is_editable($current_path)) {
			$this->error("No way.");
		}

		$this->__log(__METHOD__ . ' - editing file '. $current_path);

		$content = file_get_contents($current_path);
		$content = htmlspecialchars($content);

		if($content === false) {
			$this->error(sprintf($this->lang('ERROR_OPENING_FILE')));
		}

		$array = array(
				'Error'=>"",
				'Code'=>0,
				'Path'=>$this->get['path'],
				'Content'=>$this->formatPath($content)
		);
		
		return $array;
	}

	public function savefile() {
	
		$current_path = $this->getFullPath($this->post['path']);
	
		if(!$this->has_permission('edit') || !$this->is_valid_path($current_path) || !$this->is_editable($current_path)) {
			$this->error("No way.");
		}
	
		if(!$this->has_system_permission($current_path, array('w'))) {
			$this->error(sprintf($this->lang('ERROR_WRITING_PERM')));
		}
		
		$this->__log(__METHOD__ . ' - saving file '. $current_path);
		
		$content =  htmlspecialchars_decode($this->post['content']);
		$r = file_put_contents($current_path, $content, LOCK_EX);

		if(!is_numeric($r)) {
			$this->error(sprintf($this->lang('ERROR_SAVING_FILE')));
		}
	
		$array = array(
					'Error'=>"",
					'Code'=>0,
					'Path'=>$this->formatPath($this->post['path'])
			);
		
		return $array;
	}

	public function rename() {

		$suffix='';

		if(substr($this->get['old'],-1,1)=='/') {
			$this->get['old'] = substr($this->get['old'],0,(strlen($this->get['old'])-1));
			$suffix='/';
		}
		$tmp = explode('/',$this->get['old']);
		$filename = $tmp[(sizeof($tmp)-1)];

		$newPath = str_replace('/' . $filename, '', $this->get['old']);
		$newName = $this->cleanString($this->get['new'], array('.', '-'));

		$old_file = $this->getFullPath($this->get['old']) . $suffix;
		$new_file = $this->getFullPath($newPath . '/' . $newName). $suffix;

		if(!$this->has_permission('rename') || !$this->is_valid_path($old_file)) {
			$this->error("No way.");
		}
		
		// prevent renaming .htaccess file
		if(strpos($old_file, '.htaccess')  !== false) $this->error("No way.");
		
		// check if file is writable
		if(!$this->has_system_permission($old_file, array('w'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')));
		}
		
		// check if not requesting main FM userfiles folder
		if($this->is_root_folder($old_file)) {
			$this->error(sprintf($this->lang('NOT_ALLOWED')));
		}
		
		// For file only - we check if the new given extension is allowed regarding the security Policy settings
		if(is_file($old_file)) {
			if($this->config['security']['allowChangeExtensions'] == false && ($this->get_ext($old_file) !=  $this->get_ext($new_file))) $this->error(sprintf($this->lang('NOT_ALLOWED')));
			if(!$this->is_allowed_file_type($new_file)) $this->error(sprintf($this->lang('INVALID_FILE_TYPE')));
		}

		$this->__log(__METHOD__ . ' - renaming '. $old_file. ' to ' . $new_file);

		if(file_exists($new_file)) {
			if($suffix == '/' && is_dir($new_file)) {
				$this->error(sprintf($this->lang('DIRECTORY_ALREADY_EXISTS'), $newName));
			}
			if($suffix == '' && is_file($new_file)) {
				$this->error(sprintf($this->lang('FILE_ALREADY_EXISTS'), $newName));
			}
		}

		if(!rename($old_file,$new_file)) {
			if(is_dir($old_file)) {
				$this->error(sprintf($this->lang('ERROR_RENAMING_DIRECTORY'), $filename, $newName));
			} else {
				$this->error(sprintf($this->lang('ERROR_RENAMING_FILE'), $filename, $newName));
			}
        	} else {
            		// For image only - rename thumbnail if original image was successfully renamed
            		if(!is_dir($new_file) && $this->is_image($new_file)) {
                		$new_thumbnail = $this->get_thumbnail_path($new_file);
                		$old_thumbnail = $this->get_thumbnail_path($old_file);
                		if(file_exists($old_thumbnail)) {
                    			rename($old_thumbnail, $new_thumbnail);
                		}
            		}
        	}
        	
		$array = array(
			'Error' => "",
			'Code' => 0,
			'Old Path' => $this->formatPath($this->get['old'] . $suffix),
			'Old Name' => $filename,
			'New Path' => $this->formatPath($newPath . '/' . $newName . $suffix),
			'New Name' => $newName
		);
		return $array;
	}

	public function move() {
		
		// dynamic fileroot dir must be used when enabled
		if($this->dynamic_fileroot != '') {
			$rootDir = $this->dynamic_fileroot;
			//$rootDir = str_replace($_SERVER['DOCUMENT_ROOT'], '', $this->path_to_files); // instruction could replace the line above
		} else {
			$rootDir = $this->get['root'];
		}

		$rootDir = str_replace('//', '/', $rootDir);
		$oldPath = $this->getFullPath($this->get['old']);
		
		// check if file is writable
		if(!$this->has_system_permission($oldPath, array('w'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')),true);
		}
		
		
		// check if not requesting main FM userfiles folder
		if($this->is_root_folder($oldPath)) {
			$this->error(sprintf($this->lang('NOT_ALLOWED')),true);
		}

		// old path
		$tmp = explode('/',trim($this->get['old'], '/'));
		$fileName = array_pop($tmp); // file name or new dir name
		$path = '/' . implode('/', $tmp) . '/';

		// new path
		if (substr($this->get['new'], 0, 1) != "/") {
			// make path relative from old dir
			$newPath = $path . '/' . $this->get['new'] . '/';
		} else {
			$newPath = $rootDir . '/' . $this->get['new'] . '/';
		}

		$newPath = preg_replace('#/+#', '/', $newPath);
		$newPath = $this->expandPath($newPath, false);		

		$newRelativePath = str_replace('./', '',$newPath);
		$newPath = $this->getFullPath($newPath);
		
		if(!$this->has_permission('move') || !$this->is_valid_path($oldPath) || !$this->is_valid_path($newPath)) {
			$this->error("No way.");
		}
		
		// prevent moving .htaccess file
		if(strpos($oldPath, '.htaccess')  !== false) $this->error("No way.");

		// check if file already exists
		if (file_exists($newPath.$fileName)) {
			if(is_dir($newPath.$fileName)) {
				$this->error(sprintf($this->lang('DIRECTORY_ALREADY_EXISTS'),rtrim($this->get['new'], '/').'/'.$fileName));
			} else {
				$this->error(sprintf($this->lang('FILE_ALREADY_EXISTS'),rtrim($this->get['new'], '/').'/'.$fileName));
			}
		}

		// create dir if not exists
		if (!file_exists($newPath)) {
			if(!mkdir($newPath,0755, true)) {
				$this->error(sprintf($this->lang('UNABLE_TO_CREATE_DIRECTORY'),$newPath));
			}
		}

		// move
		$this->__log(__METHOD__ . ' - moving '. $oldPath. ' to directory ' . $newPath);

		if(!rename($oldPath,$newPath . $fileName)) {
			if(is_dir($oldPath)) {
				$this->error(sprintf($this->lang('ERROR_RENAMING_DIRECTORY'),$path,$this->get['new']));
			} else {
				$this->error(sprintf($this->lang('ERROR_RENAMING_FILE'),$path . $fileName,$this->get['new']));
			}
		}

		$array = array(
				'Error'=>"",
				'Code'=>0,
				'Old Path'=>$path,
				'Old Name'=>$fileName,
				'New Path'=>$this->formatPath($newRelativePath),
				'New Name'=>$fileName,
		);
		return $array;
	}

	public function delete() {

		$current_path = $this->getFullPath();
		$thumbnail_path = $this->get_thumbnail_path($current_path);
		
		
		if(!$this->has_permission('delete') || !$this->is_valid_path($current_path)) {
			$this->error("No way.");
		}
		
		// prevent deleting .htaccess file
		if(strpos($current_path, '.htaccess')  !== false) $this->error("No way.");
		
		// check if file is writable
		if(!$this->has_system_permission($current_path, array('w'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')));
		}
		
		// check if not requesting main FM userfiles folder
		if($this->is_root_folder($current_path)) {
			$this->error(sprintf($this->lang('NOT_ALLOWED')));
		}
			
		if(is_dir($current_path)) {
			
			$this->unlinkRecursive($current_path);
			
			// we remove thumbnails if needed
			$this->__log(__METHOD__ . ' - deleting thumbnails folder '. $thumbnail_path);
			$this->unlinkRecursive($thumbnail_path);
			
			$array = array(
					'Error'=>"",
					'Code'=>0,
					'Path'=>$this->formatPath($this->get['path'])
			);

			$this->__log(__METHOD__ . ' - deleting folder '. $current_path);
			return $array;

		} else if(file_exists($current_path)) {
			
			unlink($current_path);
			
			// delete thumbail if exists
			$this->__log(__METHOD__ . ' - deleting thumbnail file '. $thumbnail_path);
			if(file_exists($thumbnail_path)) unlink($thumbnail_path);
			
			$array = array(
					'Error'=>"",
					'Code'=>0,
					'Path'=>$this->formatPath($this->get['path'])
			);

			$this->__log(__METHOD__ . ' - deleting file '. $current_path);
			return $array;

		} else {
			$this->error(sprintf($this->lang('INVALID_DIRECTORY_OR_FILE')));
		}
	}
	
	public function replace() {
		
		$this->setParams();

		if(!isset($_FILES['fileR']) || !is_uploaded_file($_FILES['fileR']['tmp_name'])) {
			
			// if fileSize limit set by the user is greater than size allowed in php.ini file, we apply server restrictions
			// and log a warning into file
			if($this->config['upload']['fileSizeLimit'] > $this->getMaxUploadFileSize()) {
				$this->__log(__METHOD__ . ' [WARNING] : file size limit set by user is greater than size allowed in php.ini file : '. $this->config['upload']['fileSizeLimit']. $this->lang('mb') .' > '. $this->getMaxUploadFileSize(). $this->lang('mb'). '.');
				$this->config['upload']['fileSizeLimit'] = $this->getMaxUploadFileSize();
				$this->error(sprintf($this->lang('UPLOAD_FILES_SMALLER_THAN'),$this->config['upload']['fileSizeLimit'] . $this->lang('mb')),true);
			}
			
			$this->error(sprintf($this->lang('INVALID_FILE_UPLOAD') . ' '. sprintf($this->lang('UPLOAD_FILES_SMALLER_THAN'),$this->config['upload']['fileSizeLimit'] . $this->lang('mb'))),true);
		}
		// we determine max upload size if not set
		if($this->config['upload']['fileSizeLimit'] == 'auto') {
			$this->config['upload']['fileSizeLimit'] = $this->getMaxUploadFileSize();
		}

		if($_FILES['fileR']['size'] > ($this->config['upload']['fileSizeLimit'] * 1024 * 1024)) {
			$this->error(sprintf($this->lang('UPLOAD_FILES_SMALLER_THAN'),$this->config['upload']['fileSizeLimit'] . $this->lang('mb')),true);
		}
		
		// we check the given file has the same extension as the old one
		if(strtolower(pathinfo($_FILES['fileR']['name'], PATHINFO_EXTENSION)) != strtolower(pathinfo($this->post['newfilepath'], PATHINFO_EXTENSION))) {
			$this->error(sprintf($this->lang('ERROR_REPLACING_FILE') . ' '. pathinfo($this->post['newfilepath'], PATHINFO_EXTENSION)),true);
		}
		
		if(!$this->is_allowed_file_type($_FILES['fileR']['name'])) {
			$this->error(sprintf($this->lang('INVALID_FILE_TYPE')),true);
		}
		
		// we check if extension is allowed regarding the security Policy settings
		if(!$this->is_allowed_file_type($_FILES['fileR']['name'])) {
			$this->error(sprintf($this->lang('INVALID_FILE_TYPE')),true);
		}
		
		// we check if only images are allowed
		if($this->config['upload']['imagesOnly'] || (isset($this->params['type']) && strtolower($this->params['type'])=='images')) {
			if(!($size = @getimagesize($_FILES['fileR']['tmp_name']))){
				$this->error(sprintf($this->lang('UPLOAD_IMAGES_ONLY')),true);
			}
			if(!in_array($size[2], array(1, 2, 3, 7, 8))) {
				$this->error(sprintf($this->lang('UPLOAD_IMAGES_TYPE_JPEG_GIF_PNG')),true);
			}
		}

		$current_path = $this->getFullPath($this->post['newfilepath']);
		
		// check if file is writable
		if(!$this->has_system_permission($current_path, array('w'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')), true);
		}

		if(!$this->has_permission('replace') || !$this->is_valid_path($current_path)) {
			$this->error("No way.");
		}

		move_uploaded_file($_FILES['fileR']['tmp_name'], $current_path);
		
		// we delete thumbnail if file is image and thumbnail already
		if($this->is_image($current_path) && file_exists($this->get_thumbnail($current_path))) {
			unlink($this->get_thumbnail($current_path));
		}

		// automatically resize image if it's too big
		$imagePath = $current_path;
		if($this->is_image($imagePath) && $this->config['images']['resize']['enabled']) {
			if ($size = @getimagesize($imagePath)){
				if ($size[0] > $this->config['images']['resize']['maxWidth'] || $size[1] > $this->config['images']['resize']['maxHeight']) {
					
					// open an image file, crop / resize and save !
					// https://image.intervention.io/v2/api/fit
				    $resized = Image::make($imagePath)->resize($this->config['images']['resize']['maxWidth'], $this->config['images']['resize']['maxHeight'], function ($constraint) {
                        $constraint->aspectRatio();
                        $constraint->upsize();
                    });
					$resized->save($imagePath);
					
					$this->__log(__METHOD__ . ' - resizing image : '. $current_path);
				}
			}
		}

		chmod($current_path, 0644);

		$response = array(
				'Path'=>dirname($this->post['newfilepath']),
				'Name'=>basename($this->post['newfilepath']),
				'Error'=>"",
				'Code'=>0
		);

		$this->__log(__METHOD__ . ' - replacing file '. $current_path);

		echo '<textarea>' . json_encode($response) . '</textarea>';
		die();
	}

	public function add() {
			
		$this->setParams();

		if(!isset($_FILES['newfile']) || !is_uploaded_file($_FILES['newfile']['tmp_name'])) {
			
			// if fileSize limit set by the user is greater than size allowed in php.ini file, we apply server restrictions
			// and log a warning into file
			if($this->config['upload']['fileSizeLimit'] > $this->getMaxUploadFileSize()) {
				$this->__log(__METHOD__ . ' [WARNING] : file size limit set by user is greater than size allowed in php.ini file : '. $this->config['upload']['fileSizeLimit'] . 'Mb > '. $this->getMaxUploadFileSize() .'Mb.');
				$this->config['upload']['fileSizeLimit'] = $this->getMaxUploadFileSize();
				$this->error(sprintf($this->lang('UPLOAD_FILES_SMALLER_THAN'),$this->config['upload']['fileSizeLimit'] . $this->lang('mb')),true);
			}
			
			$this->error(sprintf($this->lang('INVALID_FILE_UPLOAD') . ' '. sprintf($this->lang('UPLOAD_FILES_SMALLER_THAN'),$this->config['upload']['fileSizeLimit'] . $this->lang('mb'))),true);
		}
		// we determine max upload size if not set
		if($this->config['upload']['fileSizeLimit'] == 'auto') {
			$this->config['upload']['fileSizeLimit'] = $this->getMaxUploadFileSize();
		}

		if($_FILES['newfile']['size'] > ($this->config['upload']['fileSizeLimit'] * 1024 * 1024)) {
			$this->error(sprintf($this->lang('UPLOAD_FILES_SMALLER_THAN'),$this->config['upload']['fileSizeLimit'] . $this->lang('mb')),true);
		}
		
		// we check if extension is allowed regarding the security Policy settings
		if(!$this->is_allowed_file_type($_FILES['newfile']['name'])) {
			$this->error(sprintf($this->lang('INVALID_FILE_TYPE')),true);
		}
		
		// we check if only images are allowed
		if($this->config['upload']['imagesOnly'] || (isset($this->params['type']) && strtolower($this->params['type'])=='images')) {
			if(!($size = @getimagesize($_FILES['newfile']['tmp_name']))){
				$this->error(sprintf($this->lang('UPLOAD_IMAGES_ONLY')),true);
			}
			if(!in_array($size[2], array(1, 2, 3, 7, 8))) {
				$this->error(sprintf($this->lang('UPLOAD_IMAGES_TYPE_JPEG_GIF_PNG')),true);
			}
		}
		$_FILES['newfile']['name'] = $this->cleanString($_FILES['newfile']['name'],array('.','-'));

		$current_path = $this->getFullPath($this->post['currentpath']);

		if(!$this->is_valid_path($current_path)) {
			$this->error("No way.");
		}

		if(!$this->config['upload']['overwrite']) {
			$_FILES['newfile']['name'] = $this->checkFilename($current_path,$_FILES['newfile']['name']);
		}
		move_uploaded_file($_FILES['newfile']['tmp_name'], $current_path . $_FILES['newfile']['name']);

		// automatically resize image if it's too big
		$imagePath = $current_path . $_FILES['newfile']['name'];
		if($this->is_image($imagePath) && $this->config['images']['resize']['enabled']) {
			if ($size = @getimagesize($imagePath)){
				if ($size[0] > $this->config['images']['resize']['maxWidth'] || $size[1] > $this->config['images']['resize']['maxHeight']) {

				    // open an image file, crop / resize and save !
				    // https://image.intervention.io/v2/api/fit
				    $resized = Image::make($imagePath)->resize($this->config['images']['resize']['maxWidth'], $this->config['images']['resize']['maxHeight'], function ($constraint) {
                        $constraint->aspectRatio();
                        $constraint->upsize();
                    });
				    $resized->save($imagePath);
					
					$this->__log(__METHOD__ . ' - resizing image : '. $_FILES['newfile']['name']. ' into '. $current_path);
				}
			}
		}

		chmod($current_path . $_FILES['newfile']['name'], 0644);

		$response = array(
				'Path'=>$this->post['currentpath'],
				'Name'=>$_FILES['newfile']['name'],
				'Error'=>"",
				'Code'=>0
		);

		$this->__log(__METHOD__ . ' - adding file '. $_FILES['newfile']['name']. ' into '. $current_path);

		echo '<textarea>' . json_encode($response) . '</textarea>';
		die();
	}

	public function addfolder() {
			
		$current_path = $this->getFullPath();
			
		if(!$this->is_valid_path($current_path)) {
			$this->error("No way.");
		}
		if(is_dir($current_path . $this->get['name'])) {
			$this->error(sprintf($this->lang('DIRECTORY_ALREADY_EXISTS'),$this->get['name']));

		}
		$newdir = $this->cleanString($this->get['name']);
		if(!mkdir($current_path . $newdir,0755)) {
			$this->error(sprintf($this->lang('UNABLE_TO_CREATE_DIRECTORY'),$newdir));
		}
		$array = array(
				'Parent'=>$this->get['path'],
				'Name'=>$this->get['name'],
				'Error'=>"",
				'Code'=>0
		);
		$this->__log(__METHOD__ . ' - adding folder '. $current_path . $newdir);

		return $array;
	}
	
	/**
	 * function zipFile.  Creates a zip file from source to destination
	 *
	 * @param  string $source Source path for zip
	 * @param  string $destination Destination path for zip
	 * @param  string|boolean $flag OPTIONAL If true includes the folder also
	 * @return boolean
	 * @link 	 http://stackoverflow.com/questions/17584869/zip-main-folder-with-sub-folder-inside
	 */
	public function zipFile($source, $destination, $flag = '')
	{
		if (!extension_loaded('zip') || !file_exists($source)) {
			return false;
		}
	
		$zip = new ZipArchive();
		if (!$zip->open($destination, ZIPARCHIVE::CREATE)) {
			return false;
		}
	
		$source = str_replace('\\', '/', realpath($source));
		if($flag)
		{
			$flag = basename($source) . '/';
			//$zip->addEmptyDir(basename($source) . '/');
		}
	
		if (is_dir($source) === true)
		{
			// add file to prevent empty archive error on download
			$zip->addFromString('fm', "This archive has been generated by simogeo's Filemanager : https://github.com/simogeo/Filemanager/");
			
			$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);
			foreach ($files as $file)
			{
				$file = str_replace('\\', '/', realpath($file));
	
				if (is_dir($file) === true)
				{
					$zip->addEmptyDir(str_replace($source . '/', '', $flag.$file . '/'));
				}
				else if (is_file($file) === true)
				{
					$zip->addFromString(str_replace($source . '/', '', $flag.$file), file_get_contents($file));
				}
			}
		}
		else if (is_file($source) === true)
		{
			$zip->addFromString($flag.basename($source), file_get_contents($source));
		}
	
		return $zip->close();
	}

	public function download() {
			
		$current_path = $this->getFullPath();
		
		if(!$this->has_permission('download') || !$this->is_valid_path($current_path)) {
			$this->error("No way.");
		}
		
		// prevent downloading .htaccess file
		if(strpos($current_path, '.htaccess')  !== false) $this->error("No way.");
		
		// check if file is writable
		if(!$this->has_system_permission($current_path, array('w'))) {
			$this->error(sprintf($this->lang('NOT_ALLOWED_SYSTEM')),true);
		}
		
		// we check if extension is allowed regarding the security Policy settings
		if(is_file($current_path)) {
			if(!$this->is_allowed_file_type(basename($current_path))) {
				$this->error(sprintf($this->lang('INVALID_FILE_TYPE')),true);
			}
			
		} else {
			
			// check if permission is granted
			if(is_dir($current_path) && $this->config['security']['allowFolderDownload'] == false ) {
				$this->error(sprintf($this->lang('NOT_ALLOWED')),true);
			}
			
			// check if not requesting main FM userfiles folder
			if($this->is_root_folder($current_path)) {
				$this->error(sprintf($this->lang('NOT_ALLOWED')),true);
			}
			
			$destination_path = sys_get_temp_dir().'/'.uniqid().'.zip';
			
			// if Zip archive is created
			if($this->zipFile($current_path, $destination_path, true)) {
				$current_path = $destination_path;
			} else {
				$this->error($this->lang('ERROR_CREATING_ZIP'));
			}
			
		}

		if(isset($this->get['path']) && file_exists($current_path)) {
			header("Content-type: application/force-download");
			header('Content-Disposition: inline; filename="' . basename($current_path) . '"');
			header("Content-Transfer-Encoding: Binary");
			header("Content-length: ".filesize($current_path));
			header('Content-Type: application/octet-stream');
			header('Content-Disposition: attachment; filename="' . basename($current_path) . '"');
			readfile($current_path);
			$this->__log(__METHOD__ . ' - downloading '. $current_path);
			exit();
		} else {
			$this->error(sprintf($this->lang('FILE_DOES_NOT_EXIST'),$current_path));
		}
	}

	public function preview($thumbnail) {
			
		$current_path = $this->getFullPath();
		
		if(!$this->is_valid_path($current_path)) $this->error("No way.");
		
			
		if(isset($this->get['path']) && file_exists($current_path)) {
			
			// if $thumbnail is set to true we return the thumbnail
			if($this->config['options']['generateThumbnails'] == true && $thumbnail == true) {
				// get thumbnail (and create it if needed)
				$returned_path = $this->get_thumbnail($current_path);
			} else {
				$returned_path = $current_path;
			}
			
			header("Content-type: image/" . strtolower(pathinfo($returned_path, PATHINFO_EXTENSION)));
			header("Content-Transfer-Encoding: Binary");
			header("Content-length: ".filesize($returned_path));
			header('Content-Disposition: inline; filename="' . basename($returned_path) . '"');
			readfile($returned_path);
			
			exit();
			
		} else {
			$this->error(sprintf($this->lang('FILE_DOES_NOT_EXIST'),$current_path));
		}
	}

	public function getMaxUploadFileSize() {
			
		$max_upload = (int) ini_get('upload_max_filesize');
		$max_post = (int) ini_get('post_max_size');
		$memory_limit = (int) ini_get('memory_limit');

		$upload_mb = min($max_upload, $max_post, $memory_limit);

		$this->__log(__METHOD__ . ' - max upload file size is '. $upload_mb. 'Mb');

		return $upload_mb;
	}

	private function setParams() {
		$tmp = (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/');
		$tmp = explode('?',$tmp);
		$params = array();
		if(isset($tmp[1]) && $tmp[1]!='') {
			$params_tmp = explode('&',$tmp[1]);
			if(is_array($params_tmp)) {
				foreach($params_tmp as $value) {
					$tmp = explode('=',$value);
					if(isset($tmp[0]) && $tmp[0]!='' && isset($tmp[1]) && $tmp[1]!='') {
						$params[$tmp[0]] = $tmp[1];
					}
				}
			}
		}
		$this->params = $params;
	}
	
	private function setPermissions() {
		
		$this->allowed_actions = $this->config['options']['capabilities'];
		
		if($this->config['edit']['enabled']) array_push($this->allowed_actions, 'edit');
		
	}
	
	// check if system permission is granted
	private function has_system_permission($filepath, $perms) {
		
		if(in_array('r', $perms)) {
			if(!is_readable($filepath)) return false;
		}
		if(in_array('w', $perms)) {
			if(!is_writable($filepath)) return false;
		}
		
		return true;

	}


	private function get_file_info($path='', $thumbnail = false) {
			
		// DO NOT  rawurlencode() since $current_path it
		// is used for displaying name file
		if($path=='') {
			$current_path = $this->get['path'];
		} else {
			$current_path = $path;
		}
		$tmp = explode('/',$current_path);
		$this->item['filename'] = $tmp[(sizeof($tmp)-1)];

		$tmp = explode('.',$this->item['filename']);
		$this->item['filetype'] = $tmp[(sizeof($tmp)-1)];
		$this->item['filemtime'] = filemtime($this->getFullPath($current_path));
		$this->item['filectime'] = filectime($this->getFullPath($current_path));
		
		// check if file is writable and readable
		if(!$this->has_system_permission($this->getFullPath($current_path), array('w', 'r'))) {
			$this->item['protected'] = 1;
			$this->item['preview'] = $this->config['icons']['path'] . 'locked_' . $this->config['icons']['default'];
			// prevent Internal Server Error HTTP_CODE 500 on non readable files/folders
			// without returning errors
			return;
			
		}	else {
			$this->item['protected'] = 0;
			$this->item['preview'] = $this->config['icons']['path'] . $this->config['icons']['default'];
		}
		
		if(is_dir($current_path)) {

			$this->item['preview'] = $this->config['icons']['path'] . $this->config['icons']['directory'];

		} else if(in_array(strtolower($this->item['filetype']),array_map('strtolower', $this->config['images']['imagesExt']))) {
			
			// svg should not be previewed as raster formats images
			if($this->item['filetype'] == 'svg') {
				$this->item['preview'] = $current_path;
			} else {
				$this->item['preview'] = 'connectors/php/filemanager.php?mode=preview&path='. rawurlencode($current_path).'&'. time();
				if($thumbnail) $this->item['preview'] .= '&thumbnail=true';
			}
			//if(isset($get['getsize']) && $get['getsize']=='true') {
			$this->item['properties']['Size'] = filesize($this->getFullPath($current_path));
			if ($this->item['properties']['Size']) {
				list($width, $height, $type, $attr) = getimagesize($this->getFullPath($current_path));
			} else {
				$this->item['properties']['Size'] = 0;
				list($width, $height) = array(0, 0);
			}
			$this->item['properties']['Height'] = $height;
			$this->item['properties']['Width'] = $width;
			$this->item['properties']['Size'] = filesize($this->getFullPath($current_path));
			//}

	} else if(file_exists($this->root . $this->config['icons']['path'] . strtolower($this->item['filetype']) . '.png')) {

		$this->item['preview'] = $this->config['icons']['path'] . strtolower($this->item['filetype']) . '.png';
		$this->item['properties']['Size'] = filesize($this->getFullPath($current_path));
		if (!$this->item['properties']['Size']) $this->item['properties']['Size'] = 0;

	}

	$this->item['properties']['Date Modified'] = date($this->config['options']['dateFormat'], $this->item['filemtime']);
	$this->item['properties']['filemtime'] = filemtime($this->getFullPath($current_path));
	//$return['properties']['Date Created'] = $this->config['options']['dateFormat'], $return['filectime']); // PHP cannot get create timestamp
}

private function getFullPath($path = '') {
		
	if($path == '') {
		if(isset($this->get['path'])) $path = $this->get['path'];
	}
	
	if($this->config['options']['fileRoot'] !== false) {
		$full_path = $this->doc_root . rawurldecode(str_replace ( $this->doc_root , '' , $path));
		if($this->dynamic_fileroot != '') {
			$full_path = $this->doc_root . rawurldecode(str_replace ( $this->dynamic_fileroot , '' , $path));
			// $dynPart = str_replace($_SERVER['DOCUMENT_ROOT'], '', $this->path_to_files); // instruction could replace the line above
			// $full_path = $this->path_to_files . rawurldecode(str_replace ( $dynPart , '' , $path)); // instruction could replace the line above
		}
	} else {
		$full_path = $this->doc_root . rawurldecode($path);
	}
		
	$full_path = str_replace("//", "/", $full_path);
		
	// $this->__log("getFullPath() returned path : " . $full_path);
		
	return $full_path;
		
}

/**
 * format path regarding the initial configuration
 * @param string $path
 */
private function formatPath($path) {
	
	if($this->dynamic_fileroot != '') {
		
		$a = explode($this->separator, $path);
		return end($a);
		
	} else {
		
		return $path;
		
	}

}

private function sortFiles($array) {

	// handle 'NAME_ASC'
	if($this->config['options']['fileSorting'] == 'NAME_ASC') {
		$array = array_reverse($array);
	}

	// handle 'TYPE_ASC' and 'TYPE_DESC'
	if(strpos($this->config['options']['fileSorting'], 'TYPE_') !== false || $this->config['options']['fileSorting'] == 'default') {
		
		$a = array();
		$b = array();
		
		foreach ($array as $key=>$item){
			if(strcmp($item["File Type"], "dir") == 0) {
				$a[$key]=$item;
			}else{
				$b[$key]=$item;
			}
		}

		if($this->config['options']['fileSorting'] == 'TYPE_ASC') {
			$array = array_merge($a, $b);
		}

		if($this->config['options']['fileSorting'] == 'TYPE_DESC' || $this->config['options']['fileSorting'] == 'default') {
			$array = array_merge($b, $a);
		}
	}

	// handle 'MODIFIED_ASC' and 'MODIFIED_DESC'
	if(strpos($this->config['options']['fileSorting'], 'MODIFIED_') !== false) {

		$modified_order_array = array();  // new array as a column to sort collector

		foreach ($array as $item) {
			$modified_order_array[] = $item['Properties']['filemtime'];
		}

		if($this->config['options']['fileSorting'] == 'MODIFIED_ASC') {
			array_multisort($modified_order_array, SORT_ASC, $array);
		}
		if($this->config['options']['fileSorting'] == 'MODIFIED_DESC') {
			array_multisort($modified_order_array, SORT_DESC, $array);
		}
		return $array;

	}
	
	return $array;


}

// @todo to remove
// private function startsWith($haystack, $needle) {
//     // search backwards starting from haystack length characters from the end
//     return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== FALSE;
// }

private function is_valid_path($path) {
	
	//  @todo to remove
  // if(!$this->startsWith(realpath($path), realpath($this->path_to_files))) return false;
  // @see https://github.com/simogeo/Filemanager/issues/332
  // @see http://stackoverflow.com/questions/5642785/php-a-good-way-to-universalize-paths-across-oss-slash-directions
  
	// $givenpath = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $path);
	// $rootpath = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->path_to_files);
	// $this->__log('substr doc_root : ' . substr(realpath($path) . DIRECTORY_SEPARATOR, 0, strlen($this->doc_root)));
	// $this->__log('doc_root : ' . realpath($this->doc_root) . DIRECTORY_SEPARATOR);
	
	// return $this->startsWith($givenpath, $rootpath);
	
	// handle better symlinks & network path
	$patt = array('/\\\\+/','/\/+/');
	$repl = array('\\\\','/');

	$substrpath = substr(realpath($path) . DIRECTORY_SEPARATOR, 0, strlen($this->path_to_files)) . DIRECTORY_SEPARATOR;
	$substrpath = preg_replace($patt,$repl,$substrpath); // removing double slash

	$rpath = realpath($this->path_to_files)  . DIRECTORY_SEPARATOR;
	$rpath = preg_replace($patt,$repl,$rpath); // removing double slash

	$this->__log('substr path : ' . $substrpath);
	$this->__log('real path : ' . $rpath);

  return ($substrpath == $rpath);
	
	
}

private function unlinkRecursive($dir,$deleteRootToo=true) {
	if(!$dh = @opendir($dir)) {
		return;
	}
	while (false !== ($obj = readdir($dh))) {
		if($obj == '.' || $obj == '..') {
			continue;
		}

		if (!@unlink($dir . '/' . $obj)) {
			$this->unlinkRecursive($dir.'/'.$obj, true);
		}
	}

	closedir($dh);

	if ($deleteRootToo) {
		@rmdir($dir);
	}

	return;
}

/**
 * get_ext()
 * get extension file
 * @param string $file
 */
private function get_ext($file) {
	return pathinfo($file, PATHINFO_EXTENSION);
}

/**
 * is_allowed_file_type()
 * check if extension is allowed regarding the security Policy / Restrictions settings
 * @param string $file
 */
private function is_allowed_file_type($file) {
	
	$path_parts = pathinfo($file);
			
	// if there is no extension
	if (! isset ( $path_parts ['extension'] )) {
		// we check if no extension file are allowed
		return (bool) $this->config['security']['allowNoExtension'];
	}
	
	$exts = array_map('strtolower', $this->config['security']['uploadRestrictions']);
	
	if($this->config['security']['uploadPolicy'] == 'DISALLOW_ALL') {
			
		if(!in_array(strtolower($path_parts['extension']), $exts))
			return false;
	}
	if($this->config['security']['uploadPolicy'] == 'ALLOW_ALL') {
	
		if(in_array(strtolower($path_parts['extension']), $exts))
			return false;
	}
	
	return true;
	
}

private function cleanString($string, $allowed = array()) {
	$allow = null;

	if (!empty($allowed)) {
		foreach ($allowed as $value) {
			$allow .= "\\$value";
		}
	}

	$mapping = array(
			'Š'=>'S', 'š'=>'s', 'Đ'=>'Dj', 'đ'=>'dj', 'Ž'=>'Z', 'ž'=>'z', 'Č'=>'C', 'č'=>'c', 'Ć'=>'C', 'ć'=>'c',
			'À'=>'A', 'Á'=>'A', 'Â'=>'A', 'Ã'=>'A', 'Ä'=>'A', 'Å'=>'A', 'Æ'=>'A', 'Ç'=>'C', 'È'=>'E', 'É'=>'E',
			'Ê'=>'E', 'Ë'=>'E', 'Ì'=>'I', 'Í'=>'I', 'Î'=>'I', 'Ï'=>'I', 'Ñ'=>'N', 'Ò'=>'O', 'Ó'=>'O', 'Ô'=>'O',
			'Õ'=>'O', 'Ö'=>'O', 'Ő'=>'O', 'Ø'=>'O', 'Ù'=>'U', 'Ú'=>'U', 'Û'=>'U', 'Ü'=>'U', 'Ű'=>'U', 'Ý'=>'Y',
			'Þ'=>'B', 'ß'=>'Ss','à'=>'a', 'á'=>'a', 'â'=>'a', 'ã'=>'a', 'ä'=>'a', 'å'=>'a', 'æ'=>'a', 'ç'=>'c',
			'è'=>'e', 'é'=>'e', 'ê'=>'e', 'ë'=>'e', 'ì'=>'i', 'í'=>'i', 'î'=>'i', 'ï'=>'i', 'ð'=>'o', 'ñ'=>'n',
			'ò'=>'o', 'ó'=>'o', 'ô'=>'o', 'õ'=>'o', 'ö'=>'o', 'ő'=>'o', 'ø'=>'o', 'ù'=>'u', 'ú'=>'u', 'ű'=>'u',
			'û'=>'u', 'ü'=>'u', 'ý'=>'y', 'ý'=>'y', 'þ'=>'b', 'ÿ'=>'y', 'Ŕ'=>'R', 'ŕ'=>'r', ' '=>'_', "'"=>'_', '/'=>''
	);

	if (is_array($string)) {

		$cleaned = array();

		foreach ($string as $key => $clean) {
			$clean = strtr($clean, $mapping);

			if($this->config['options']['chars_only_latin'] == true) {
				$clean = preg_replace("/[^{$allow}_a-zA-Z0-9]/u", '', $clean);
				// $clean = preg_replace("/[^{$allow}_a-zA-Z0-9\x{0430}-\x{044F}\x{0410}-\x{042F}]/u", '', $clean); // allow only latin alphabet with cyrillic
			}
			$cleaned[$key] = preg_replace('/[_]+/', '_', $clean); // remove double underscore
		}
	} else {
		$clean = strtr($string, $mapping);
		if($this->config['options']['chars_only_latin'] == true) {
			$clean = preg_replace("/[^{$allow}_a-zA-Z0-9]/u", '', $clean);
			// $clean = preg_replace("/[^{$allow}_a-zA-Z0-9\x{0430}-\x{044F}\x{0410}-\x{042F}]/u", '', $string); // allow only latin alphabet with cyrillic
		}
		$cleaned = preg_replace('/[_]+/', '_', $clean); // remove double underscore
		
	}
	
	// prevent bug https://github.com/simogeo/Filemanager/issues/474
	$path_parts = pathinfo($cleaned);
	if(empty($path_parts['filename'])) {
		$path_parts['filename'] = "unsupportedCharsReplacement";
		$cleaned = $path_parts['filename'] . '.' . $path_parts['extension'] ;
	}
	return $cleaned;
}

/**
 * Checking if permission is set or not for a given action
 * @param string $action
 * @return boolean
 */
private function has_permission($action) {
	return in_array($action, $this->allowed_actions);
}

/**
 * Return Thumbnail path from given path
 * works for both file and dir path
 * @param string $path
 */
private function get_thumbnail_path($path) {
	
	$pos = strrpos($path, $this->separator);
	$a[0] = substr($path,0,$pos);
	$a[1] = substr($path,$pos+strlen($this->separator));

	$path_parts = pathinfo($path);

	$thumbnail_path = $a[0].$this->separator.'/'.$this->cachefolder.dirname(end($a)).'/';
	if(!is_dir($path)) $thumbnail_name = $path_parts['filename'] . '_' . $this->thumbnail_width . 'x' . $this->thumbnail_height . 'px.' . $path_parts['extension'];
	
	if(is_dir($path)) {
		$thumbnail_fullpath = $thumbnail_path;
	} else {
		$thumbnail_fullpath = $thumbnail_path.$thumbnail_name;
	}

	return $thumbnail_fullpath;

}

/**
 * For debugging just call
 * the direct URL http://localhost/Filemanager/connectors/php/filemanager.php?mode=preview&path=%2FFilemanager%2Fuserfiles%2FMy%20folder3%2Fblanches_neiges.jPg&thumbnail=true
 * and echo vars below
 * @param string $path
 */
private function get_thumbnail($path) {
	
	$thumbnail_fullpath = $this->get_thumbnail_path($path);
	
	// echo $thumbnail_fullpath.'<br>';
	
	// if thumbnail does not exist we generate it or cacheThumbnail is set to false
	if(!file_exists($thumbnail_fullpath) || $this->config['options']['cacheThumbnails'] == false) {
		
		// create folder if it does not exist
		if(!file_exists(dirname($thumbnail_fullpath))) {
			mkdir(dirname($thumbnail_fullpath), 0755, true);
		}
		// open an image file, crop / resize and save !
		// https://image.intervention.io/v2/api/fit
		$resized = Image::make($path)->fit($this->thumbnail_width, $this->thumbnail_height);
		$resized->save($thumbnail_fullpath);

		$this->__log(__METHOD__ . ' - generating thumbnail :  '. $thumbnail_fullpath);
		
	}
	
	return $thumbnail_fullpath;
}

private function sanitize($var) {
	
	$sanitized = strip_tags($var);
	$sanitized = str_replace('http://', '', $sanitized);
	$sanitized = str_replace('https://', '', $sanitized);
	$sanitized = str_replace('../', '', $sanitized);

	return $sanitized;
}

private function checkFilename($path,$filename,$i='') {
	if(!file_exists($path . $filename)) {
		return $filename;
	} else {
		$_i = $i;
		$tmp = explode(/*$this->config['upload']['suffix'] . */$i . '.',$filename);
		if($i=='') {
			$i=1;
		} else {
			$i++;
		}
		$filename = str_replace($_i . '.' . $tmp[(sizeof($tmp)-1)],$i . '.' . $tmp[(sizeof($tmp)-1)],$filename);
		return $this->checkFilename($path,$filename,$i);
	}
}

private function loadLanguageFile() {

	// we load langCode var passed into URL if present and if exists
	// else, we use default configuration var
	$lang = $this->config['options']['culture'];
	if(isset($this->params['langCode']) && in_array($this->params['langCode'], $this->languages)) $lang = $this->params['langCode'];

	if(file_exists($this->root. 'scripts/languages/'.$lang.'.js')) {
		$stream =file_get_contents($this->root. 'scripts/languages/'.$lang.'.js');
		$this->language = json_decode($stream, true);
	} else {
		$l = substr($lang,0,2); // we try with 2 chars language file
		if(file_exists($this->root. 'scripts/languages/'.$l.'.js')) {
			$stream =file_get_contents($this->root. 'scripts/languages/'.$l.'.js');
			$this->language = json_decode($stream, true);
		} else {
			// we include default language file
			$stream =file_get_contents($this->root. 'scripts/languages/'.$this->config['options']['culture'].'.js');
			$this->language = json_decode($stream, true);
		}
		
	}
}

private function availableLanguages() {

	if ($handle = opendir($this->root.'/scripts/languages/')) {
		while (false !== ($file = readdir($handle))) {
			if ($file != "." && $file != "..") {
				array_push($this->languages, pathinfo($file, PATHINFO_FILENAME));
			}
		}
		closedir($handle);
	}
}

private function is_image($path) {
	
	$a = getimagesize($path);
	$image_type = $a[2];

	return in_array($image_type , array(IMAGETYPE_GIF , IMAGETYPE_JPEG ,IMAGETYPE_PNG , IMAGETYPE_BMP));
}

private function is_root_folder($path) {
	return rtrim($this->path_to_files,"/") == rtrim($path,"/");
}

private function is_editable($file) {

	$path_parts = pathinfo($file);
	
	$exts = array_map('strtolower', $this->config['edit']['editExt']);
	
	return in_array($path_parts['extension'], $exts);
}


private function get_user_ip()
{
	$client  = @$_SERVER['HTTP_CLIENT_IP'];
	$forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
	$remote  = $_SERVER['REMOTE_ADDR'];

	if(filter_var($client, FILTER_VALIDATE_IP))
	{
		$ip = $client;
	}
	elseif(filter_var($forward, FILTER_VALIDATE_IP))
	{
		$ip = $forward;
	}
	else
	{
		$ip = $remote;
	}

	return $ip;
}


private function __log($msg) {
		
	if($this->logger == true) {

		$fp = fopen($this->logfile, "a");
		$str = "[" . date("d/m/Y h:i:s", time()) . "]#".  $this->get_user_ip() . "#" . $msg;
		fwrite($fp, $str . PHP_EOL);
		fclose($fp);
	}
		
}

public function enableLog($logfile = '') {
		
	$this->logger = true;
		
	if($logfile != '') {
		$this->logfile = $logfile;
	}
		
	$this->__log(__METHOD__ . ' - Log enabled (in '. $this->logfile. ' file)');
		
}

public function disableLog() {

	$this->logger = false;

	$this->__log(__METHOD__ . ' - Log disabled');
}

/**
 * Remove "../" from path
 *
 * @param string path to be converted
 * @param bool if dir names should be cleaned
 * @return string or false in case of error (as exception are not used here)
 */
public function expandPath($path, $clean = false)
{
	$todo  = explode('/', $path);
	$fullPath = array();

	foreach ($todo as $dir) {
		if ($dir == '..') {
			$element = array_pop($fullPath);
			if (is_null($element)) {
				return false;
			}
		} else {
			if ($clean) {
				$dir = $this->cleanString($dir);
			}
			array_push($fullPath, $dir);
		}
	}
	return implode('/', $fullPath);
}
}
?>