index.php

<?php
/***************************************************************************
 *
 * Encode Explorer
 * The Bootstrap Version
 *
 * Author : Marek Rei (marek ät marekrei dot com)
 *        : Vino Rodrigues
 * Version : 6.4.2-BS3.3.6
 * Homepage : encode-explorer.siineiolekala.net
 *
 *
 * NB!:If you change anything, save with UTF-8! Otherwise you may
 *     encounter problems, especially when displaying images.
 *
 ***************************************************************************/

/***************************************************************************/
/*   HERE ARE THE SETTINGS FOR CONFIGURATION                               */
/***************************************************************************/

//
// Initialising variables. Don't change these.
//

$_CONFIG = array();
$_ERROR = "";
$_START_TIME = microtime(TRUE);

/*
 * GENERAL SETTINGS
 */

//
// Choose a language. See below in the language section for options.
// Default: $_CONFIG['lang'] = "en";
//
$_CONFIG['lang'] = "en";

//
// Display thumbnails when hovering over image entries in the list.
// Common image types are supported (jpeg, png, gif).
// Pdf files are also supported but require ImageMagick to be installed.
// Default: $_CONFIG['thumbnails'] = true;
//
$_CONFIG['thumbnails'] = true;

//
// Maximum sizes of the thumbnails.
// Default: $_CONFIG['thumbnails_width'] = 200;
// Default: $_CONFIG['thumbnails_height'] = 200;
//
$_CONFIG['thumbnails_width'] = 200;
$_CONFIG['thumbnails_height'] = 200;

/*
 * USER INTERFACE
 */

//
// Will the files be opened in a new window? true/false
// Default: $_CONFIG['open_in_new_window'] = false;
//
$_CONFIG['open_in_new_window'] = false;

//
// When clicking on files, will the files be downloaded rather than opened? true/false
// Default: $_CONFIG['force_download'] = false;
//
$_CONFIG['force_download'] = false;

//
// How deep in subfolders will the script search for files?
// Set it larger than 0 to display the total used space.
// Default: $_CONFIG['calculate_space_level'] = 0;
//
$_CONFIG['calculate_space_level'] = 0;

//
// Will the page header be displayed? 0=no, 1=yes.
// Default: $_CONFIG['show_top'] = true;
//
$_CONFIG['show_top'] = true;

//
// The title for the page
// Default: $_CONFIG['main_title'] = "Encode Explorer";
//
$_CONFIG['main_title'] = "Encode Explorer";

//
// The secondary page titles, randomly selected and displayed under the main header.
// For example: $_CONFIG['secondary_titles'] = array("Secondary title", "&ldquo;Secondary title with quotes&rdquo;");
// Default: $_CONFIG['secondary_titles'] = array();
//
$_CONFIG['secondary_titles'] = array();

//
// Display breadcrumbs (relative path of the location).
// Default: $_CONFIG['show_path'] = true;
//
$_CONFIG['show_path'] = true;

//
// Display the time it took to load the page.
// Default: $_CONFIG['show_load_time'] = true;
//
$_CONFIG['show_load_time'] = true;

//
// The time format for the "last changed" column.
// Default: $_CONFIG['time_format'] = "Y/m/d H:i";
//
$_CONFIG['time_format'] = "d/m/y H:i:s";

//
// Charset. Use the one that suits for you.
// Default: $_CONFIG['charset'] = "UTF-8";
//
$_CONFIG['charset'] = "UTF-8";

//
// Show a link to open directory
// Default: $_CONFIG['show_dir_link'] = false;
//
$_CONFIG['show_dir_link'] = true;

/*
* PERMISSIONS
*/

//
// The array of folder names that will be hidden from the list.
// Default: $_CONFIG['hidden_dirs'] = array();
//
$_CONFIG['hidden_dirs'] = array();

//
// Filenames that will be hidden from the list.
// Default: $_CONFIG['hidden_files'] = array("index.php", "index.json", "index.css", ".htaccess", ".htpasswd", ".ftpquota");
//
$_CONFIG['hidden_files'] = array("index.php", "index.json", "index.css", ".htaccess", ".htpasswd", ".ftpquota");

//
// Whether authentication is required to see the contents of the page.
// If set to false, the page is public.
// If set to true, you should specify some users as well (see below).
// Important: This only prevents people from seeing the list.
// They will still be able to access the files with a direct link.
// Default: $_CONFIG['require_login'] = false;
//
$_CONFIG['require_login'] = false;

//
// Usernames and passwords for restricting access to the page.
// The format is: array(username, password, status)
// Status can be either "user" or "admin". User can read the page, admin can upload and delete.
// For example: $_CONFIG['users'] = array(array("username1", "md5_hash_of_password1", "user"), array("username2", "md5_hash_of_password2", "admin"));
// You can also keep require_login=false and specify an admin.
// That way everyone can see the page but username and password are needed for uploading.
// For example: $_CONFIG['users'] = array(array("username", "md5_hash_of_password", "admin"));
// Passwords must be MD5 hashes (Never store clear text passwords!) - see: http://www.php.net/manual/en/function.md5.php
// Default: $_CONFIG['users'] = array();
//
$_CONFIG['users'] = array();

//
// Permissions for uploading, creating new directories and deleting.
// They only apply to admin accounts, regular users can never perform these operations.
// Default:
// $_CONFIG['upload_enable'] = true;
// $_CONFIG['newdir_enable'] = true;
// $_CONFIG['delete_enable'] = false;
//
$_CONFIG['upload_enable'] = true;
$_CONFIG['newdir_enable'] = true;
$_CONFIG['delete_enable'] = false;

/*
 * UPLOADING
 */

//
// List of directories where users are allowed to upload.
// For example: $_CONFIG['upload_dirs'] = array("./myuploaddir1/", "./mydir/upload2/");
// The path should be relative to the main directory, start with "./" and end with "/".
// All the directories below the marked ones are automatically included as well.
// If the list is empty (default), all directories are open for uploads, given that the password has been set.
// Default: $_CONFIG['upload_dirs'] = array();
//
$_CONFIG['upload_dirs'] = array();

//
// MIME type that are allowed to be uploaded.
// For example, to only allow uploading of common image types, you could use:
// $_CONFIG['upload_allow_type'] = array("image/png", "image/gif", "image/jpeg");
// Default: $_CONFIG['upload_allow_type'] = array();
//
$_CONFIG['upload_allow_type'] = array();

//
// File extensions that are not allowed for uploading.
// For example: $_CONFIG['upload_reject_extension'] = array("php", "html", "htm");
// Default: $_CONFIG['upload_reject_extension'] = array();
//
$_CONFIG['upload_reject_extension'] = array("php", "php2", "php3", "php4", "php5", "phtml");

//
// By default, apply 755 permissions to new directories
//
// The mode parameter consists of three octal number components specifying
// access restrictions for the owner, the user group in which the owner is
// in, and to everybody else in this order.
//
// See: https://php.net/manual/en/function.chmod.php
//
// Default: $_CONFIG['new_dir_mode'] = 755;
//
$_CONFIG['new_dir_mode'] = 755;

//
// By default, apply 644 permissions to uploaded files
//
// The mode parameter consists of three octal number components specifying
// access restrictions for the owner, the user group in which the owner is
// in, and to everybody else in this order.
//
// See: https://php.net/manual/en/function.chmod.php
//
// Default: $_CONFIG['upload_file_mode'] = 644;
//
$_CONFIG['upload_file_mode'] = 644;

/*
 * LOGGING
 */

//
// Upload notification e-mail.
// If set, an e-mail will be sent every time someone uploads a file or creates a new dirctory.
// Default: $_CONFIG['upload_email'] = "";
//
$_CONFIG['upload_email'] = "";

//
// Logfile name. If set, a log line will be written there whenever a directory or file is accessed.
// For example: $_CONFIG['log_file'] = ".log.txt";
// Default: $_CONFIG['log_file'] = "";
//
$_CONFIG['log_file'] = "";

/*
 * SYSTEM
 */

//
// The starting directory. Normally no need to change this.
// Use only relative subdirectories!
// For example: $_CONFIG['starting_dir'] = "./mysubdir/";
// Default: $_CONFIG['starting_dir'] = ".";
//
$_CONFIG['starting_dir'] = ".";

//
// Location in the server. Usually this does not have to be set manually.
// Default: $_CONFIG['basedir'] = "";
//
$_CONFIG['basedir'] = "";

//
// Big files. If you have some very big files (>4GB), enable this for correct
// file size calculation.
// Default: $_CONFIG['large_files'] = false;
//
$_CONFIG['large_files'] = false;

//
// The session name, which is used as a cookie name.
// Change this to something original if you have multiple copies in the same space
// and wish to keep their authentication separate.
// The value can contain only letters and numbers. For example: MYSESSION1
// More info at: http://www.php.net/manual/en/function.session-name.php
// Default: $_CONFIG['session_name'] = "";
//
$_CONFIG['session_name'] = "";

//
// Styleheet loaded, can be string or array() of strings.
//
$_CONFIG['stylesheet'] = "https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css";
$_CONFIG['javascript'] = array(
	"https://code.jquery.com/jquery-3.3.1.slim.min.js",
	"https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js",
	);


/***************************************************************************/
/*   TRANSLATIONS.                                                         */
/*                                                                         */
/*   NB!:Please refer to the original project for other translations       */
/*   https://github.com/marekrei/encode-explorer                           */
/***************************************************************************/

$_TRANSLATIONS = array();

// English
$_TRANSLATIONS["en"] = array(
	"file_name" => "File name",
	"size" => "Size",
	"last_changed" => "Last updated",
	"total_used_space" => "Total space used",
	"free_space" => "Free space",
	"password" => "Password",
	"upload" => "Upload",
	"failed_upload" => "Failed to upload the file!",
	"failed_move" => "Failed to move the file into the right directory!",
	"wrong_password" => "Wrong password",
	"make_directory" => "New directory",
	"new_dir_failed" => "Failed to create directory",
	"chmod_dir_failed" => "Failed to change directory rights",
	"unable_to_read_dir" => "Unable to read directory",
	"location" => "Location",
	"root" => "",
	"log_file_permission_error" => "The script does not have permissions to write the log file.",
	"upload_not_allowed" => "The script configuration does not allow uploading in this directory.",
	"upload_dir_not_writable" => "This directory does not have write permissions.",
	"mobile_version" => "Mobile view",
	"standard_version" => "Standard view",
	"page_load_time" => "Page loaded in %.2f ms",
	"wrong_pass" => "Wrong username or password",
	"username" => "Username",
	"log_in" => "Sign in",
	"upload_type_not_allowed" => "This file type is not allowed for uploading.",
	"del" => "Delete",
	"sure_del" => "Are you sure you want to delete",
	"log_out" => "Sign out"
);

/***************************************************************************/
/*   LOAD EXTERNAL CONFIG                                                  */
/***************************************************************************/

$config_file = basename(__FILE__, '.php').".json";
if (file_exists($config_file)) {
	$json = (array) json_decode( file_get_contents($config_file), true );
	if ($json == NULL) echo '<!-- JSON Error ' . json_last_error() . ': ' . json_last_error_msg() . ' -->';
	foreach ($json as $key => $value)
		if ($key != 'translation') $_CONFIG[$key] = $value;
	// TODO: Load translations from json file(?)
}

/***************************************************************************/
/*   CSS FOR TWEAKING THE DESIGN                                           */
/***************************************************************************/

function css()
{
	global $_CONFIG;
	if (is_array($_CONFIG["stylesheet"])) {
		foreach ($_CONFIG["stylesheet"] as $value)
			print "<link rel=\"stylesheet\" href=\"" . $value . "\">\n";
	} else
		print "<link rel=\"stylesheet\" href=\"" . $_CONFIG["stylesheet"] . "\">\n";
?>
<style type="text/css">

@media (min-width: 960px) {
	.container {
		max-width: 922px;
	}
}

/* General styles */

.alert {
	margin: 20px 0;
}

.label-text .glyphicon {
	margin-right: 0.33em;
}

/* Title area */

#top {
	text-align: center;
}

/* Info area */

#info {
	display: block;
	position: relative;
	margin: 0 auto;
	text-align: center;
        margin-top: 10px;
        padding-top: 4px;
        border-top: 1px dotted #EEE;
}

/* Upload area */

#login,
#upload {
	padding: 15px;
	margin-bottom: 15px;
	border: 1px solid transparent;
	border-radius: 4px;
	background-color: rgba(0,0,0,0.1);
}

#upload input.upload_file{
	font-size: small;
}

/* Thumbnail area */

#thumb {
	position: absolute;
	border: 1px solid #CDD2D6;
	background: #f8f9fa;
	display: none;
	padding: 3px;
}

#thumb img {
	display:block;
}

.dirlink:hover, .dirlink:active, .dirlink:focus { text-decoration: none; }

.del {
	text-align: center;
}

</style>

<?php
	$addon_css_file = basename(__FILE__, '.php').".css";
	if (file_exists($addon_css_file))
		echo "\n<link rel=\"stylesheet\" href=\"" . $addon_css_file . "\">";
}

/***************************************************************************/
/*   IMAGE CODES IN BASE64                                                 */
/*   You can generate your own with a converter                            */
/*   Like here: http://www.motobit.com/util/base64-decoder-encoder.asp     */
/*   Or here: http://www.greywyvern.com/code/php/binary2base64             */
/*   Or just use PHP base64_encode() function                              */
/***************************************************************************/


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$_IMAGES["gz"] = $_IMAGES["archive"];
$_IMAGES["gif"] = $_IMAGES["image"];
$_IMAGES["h"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["htm"] = $_IMAGES["webpage"];
$_IMAGES["html"] = $_IMAGES["webpage"];
$_IMAGES["iso"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["java"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["jpg"] = $_IMAGES["image"];
$_IMAGES["jpeg"] = $_IMAGES["image"];
$_IMAGES["js"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["mov"] = $_IMAGES["video"];
$_IMAGES["mp2"] = $_IMAGES["audio"];
$_IMAGES["mp3"] = $_IMAGES["audio"];
$_IMAGES["mp4"] = $_IMAGES["video"];
$_IMAGES["mp4a"] = $_IMAGES["audio"];
$_IMAGES["ogg"] = $_IMAGES["audio"];
$_IMAGES["flac"] = $_IMAGES["audio"];
$_IMAGES["mpeg"] = $_IMAGES["video"];
$_IMAGES["mpg"] = $_IMAGES["video"];
$_IMAGES["odg"] = $_IMAGES["vectorgraphics"];
$_IMAGES["odp"] = $_IMAGES["presentation"];
$_IMAGES["ods"] = $_IMAGES["spreadsheet"];
$_IMAGES["odt"] = $_IMAGES["textdocument"];
$_IMAGES["pdf"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["php"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["png"] = $_IMAGES["image"];
$_IMAGES["pps"] = $_IMAGES["presentation"];
$_IMAGES["ppsx"] = $_IMAGES["presentation"];
$_IMAGES["ppt"] = $_IMAGES["presentation"];
$_IMAGES["pptx"] = $_IMAGES["presentation"];
$_IMAGES["psd"] = $_IMAGES["graphics"];
$_IMAGES["svg"] = $_IMAGES["image"];
$_IMAGES["rar"] = $_IMAGES["archive"];
$_IMAGES["rb"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["sln"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["sql"] = $_IMAGES["database"];
$_IMAGES["tar"] = $_IMAGES["archive"];
$_IMAGES["tgz"] = $_IMAGES["archive"];
$_IMAGES["txt"] = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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$_IMAGES["wav"] = $_IMAGES["audio"];
$_IMAGES["wma"] = $_IMAGES["audio"];
$_IMAGES["wmv"] = $_IMAGES["video"];
$_IMAGES["xcf"] = $_IMAGES["graphics"];
$_IMAGES["xls"] = $_IMAGES["spreadsheet"];
$_IMAGES["xlsx"] = $_IMAGES["spreadsheet"];
$_IMAGES["xml"] = $_IMAGES["code"];
$_IMAGES["zip"] = $_IMAGES["archive"];

/***************************************************************************/
/*   HERE COMES THE CODE.                                                  */
/*   DON'T CHANGE UNLESS YOU KNOW WHAT YOU ARE DOING ;)                    */
/***************************************************************************/

//
// The class that displays images (icons and thumbnails)
//
class ImageServer
{
	//
	// Checks if an image is requested and displays one if needed
	//
	public static function showImage()
	{
		global $_IMAGES;
		if(isset($_GET['img']))
		{
			$mtime = gmdate('r', filemtime($_SERVER['SCRIPT_FILENAME']));
			$etag = md5($mtime.$_SERVER['SCRIPT_FILENAME']);

			if ((isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $_SERVER['HTTP_IF_MODIFIED_SINCE'] == $mtime)
				|| (isset($_SERVER['HTTP_IF_NONE_MATCH']) && str_replace('"', '', stripslashes($_SERVER['HTTP_IF_NONE_MATCH'])) == $etag))
			{
				header('HTTP/1.1 304 Not Modified');
				return true;
			}
			else {
				header('ETag: "'.$etag.'"');
				header('Last-Modified: '.$mtime);
				header('Content-type: image/gif');
				if(is_scalar($_GET['img']) && strlen($_GET['img']) > 0 && isset($_IMAGES[$_GET['img']]))
					print base64_decode($_IMAGES[$_GET['img']]);
				else
					print base64_decode($_IMAGES["unknown"]);
			}
			return true;
		}
		else if(isset($_GET['thumb']))
		{
			if(is_scalar($_GET['thumb']) && strlen($_GET['thumb']) > 0 && EncodeExplorer::getConfig('thumbnails') == true)
			{
				ImageServer::showThumbnail($_GET['thumb']);
			}
			return true;
		}
		return false;
	}

	public static function isEnabledPdf()
	{
		if(class_exists("Imagick"))
			return true;
		return false;
	}

	public static function openPdf($file)
	{
		if(!ImageServer::isEnabledPdf())
			return null;

		$im = new Imagick($file.'[0]');
		$im->setImageFormat( "png" );
		$str = $im->getImageBlob();
		$im2 = imagecreatefromstring($str);
		return $im2;
	}

	//
	// Creates and returns a thumbnail image object from an image file
	//
	public static function createThumbnail($file)
	{
		if(is_int(EncodeExplorer::getConfig('thumbnails_width')))
			$max_width = EncodeExplorer::getConfig('thumbnails_width');
		else
			$max_width = 200;

		if(is_int(EncodeExplorer::getConfig('thumbnails_height')))
			$max_height = EncodeExplorer::getConfig('thumbnails_height');
		else
			$max_height = 200;

		if(File::isPdfFile($file))
			$image = ImageServer::openPdf($file);
		else
			$image = ImageServer::openImage($file);
		if($image == null)
			return;

		imagealphablending($image, true);
		imagesavealpha($image, true);

		$width = imagesx($image);
		$height = imagesy($image);

		$new_width = $max_width;
		$new_height = $max_height;
		if(($width/$height) > ($new_width/$new_height))
			$new_height = $new_width * ($height / $width);
		else
			$new_width = $new_height * ($width / $height);

		if($new_width >= $width && $new_height >= $height)
		{
			$new_width = $width;
			$new_height = $height;
		}

		$new_image = ImageCreateTrueColor($new_width, $new_height);
		imagealphablending($new_image, true);
		imagesavealpha($new_image, true);
		$trans_colour = imagecolorallocatealpha($new_image, 0, 0, 0, 127);
		imagefill($new_image, 0, 0, $trans_colour);

		imagecopyResampled ($new_image, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

		return $new_image;
	}

	//
	// Function for displaying the thumbnail.
	// Includes attempts at cacheing it so that generation is minimised.
	//
	public static function showThumbnail($file)
	{
		if(filemtime($file) < filemtime($_SERVER['SCRIPT_FILENAME']))
			$mtime = gmdate('r', filemtime($_SERVER['SCRIPT_FILENAME']));
		else
			$mtime = gmdate('r', filemtime($file));

		$etag = md5($mtime.$file);

		if ((isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $_SERVER['HTTP_IF_MODIFIED_SINCE'] == $mtime)
			|| (isset($_SERVER['HTTP_IF_NONE_MATCH']) && str_replace('"', '', stripslashes($_SERVER['HTTP_IF_NONE_MATCH'])) == $etag))
		{
			header('HTTP/1.1 304 Not Modified');
			return;
		}
		else
		{
			header('ETag: "'.$etag.'"');
			header('Last-Modified: '.$mtime);
			header('Content-Type: image/png');
			$image = ImageServer::createThumbnail($file);
			imagepng($image);
		}
	}

	//
	// A helping function for opening different types of image files
	//
	public static function openImage ($file)
	{
		$size = getimagesize($file);
		switch($size["mime"])
		{
			case "image/jpeg":
				$im = imagecreatefromjpeg($file);
			break;
			case "image/gif":
				$im = imagecreatefromgif($file);
			break;
			case "image/png":
				$im = imagecreatefrompng($file);
			break;
			default:
				$im=null;
			break;
		}
		return $im;
	}
}

//
// The class for logging user activity
//
class Logger
{
	public static function log($message)
	{
		global $encodeExplorer;
		if(strlen(EncodeExplorer::getConfig('log_file')) > 0)
		{
			if(Location::isFileWritable(EncodeExplorer::getConfig('log_file')))
			{
				$message = "[" . date("Y-m-d h:i:s", mktime()) . "] ".$message." (".$_SERVER["HTTP_USER_AGENT"].")\n";
				error_log($message, 3, EncodeExplorer::getConfig('log_file'));
			}
			else
				$encodeExplorer->setErrorString("log_file_permission_error");
		}
	}

	public static function logAccess($path, $isDir)
	{
		$message = $_SERVER['REMOTE_ADDR']." ".GateKeeper::getUserName()." accessed ";
		$message .= $isDir?"dir":"file";
		$message .= " ".$path;
		Logger::log($message);
	}

	public static function logQuery()
	{
		if(isset($_POST['log']) && strlen($_POST['log']) > 0)
		{
			Logger::logAccess($_POST['log'], false);
			return true;
		}
		else
			return false;
	}

	public static function logCreation($path, $isDir)
	{
		$message = $_SERVER['REMOTE_ADDR']." ".GateKeeper::getUserName()." created ";
		$message .= $isDir?"dir":"file";
		$message .= " ".$path;
		Logger::log($message);
	}

	public static function emailNotification($path, $isFile)
	{
		if(strlen(EncodeExplorer::getConfig('upload_email')) > 0)
		{
			$message = "This is a message to let you know that ".GateKeeper::getUserName()." ";
			$message .= ($isFile?"uploaded a new file":"created a new directory")." in Encode Explorer.\n\n";
			$message .= "Path : ".$path."\n";
			$message .= "IP : ".$_SERVER['REMOTE_ADDR']."\n";
			mail(EncodeExplorer::getConfig('upload_email'), "Upload notification", $message);
		}
	}
}

//
// The class controls logging in and authentication
//
class GateKeeper
{
	public static function init()
	{
		global $encodeExplorer;
		if(strlen(EncodeExplorer::getConfig("session_name")) > 0)
				session_name(EncodeExplorer::getConfig("session_name"));

		if(count(EncodeExplorer::getConfig("users")) > 0)
			@session_start();
		else
			return;

		if(isset($_GET['logout']))
		{
			$_SESSION['ee_user_name'] = null;
			$_SESSION['ee_user_pass'] = null;
		}

		if(isset($_POST['user_pass']) && strlen($_POST['user_pass']) > 0)
		{
			if(GateKeeper::isUser((isset($_POST['user_name'])?$_POST['user_name']:""), md5($_POST['user_pass'])))
			{
				$_SESSION['ee_user_name'] = isset($_POST['user_name'])?$_POST['user_name']:"";
				$_SESSION['ee_user_pass'] = md5($_POST['user_pass']);

				$addr  = $_SERVER['PHP_SELF'];
				$param = '';

				if(isset($_GET['m']))
					$param .= (strlen($param) == 0 ? '?m' : '&m');

				if(isset($_GET['s']))
					$param .= (strlen($param) == 0 ? '?s' : '&s');

				if(isset($_GET['dir']) && strlen($_GET['dir']) > 0)
				{
					$param .= (strlen($param) == 0 ? '?dir=' : '&dir=');
					$param .= urlencode($_GET['dir']);
				}
				header( "Location: ".$addr.$param);
			}
			else
				$encodeExplorer->setErrorString("wrong_pass");
		}
	}

	public static function isUser($userName, $userPass)
	{
		foreach(EncodeExplorer::getConfig("users") as $user)
		{
			if($user[1] == $userPass)
			{
				if(strlen($userName) == 0 || $userName == $user[0])
				{
					return true;
				}
			}
		}
		return false;
	}

	public static function isLoginRequired()
	{
		if(EncodeExplorer::getConfig("require_login") == false){
			return false;
		}
		return true;
	}

	public static function isUserLoggedIn()
	{
		if(isset($_SESSION['ee_user_name'], $_SESSION['ee_user_pass']))
		{
			if(GateKeeper::isUser($_SESSION['ee_user_name'], $_SESSION['ee_user_pass']))
				return true;
		}
		return false;
	}

	public static function isAccessAllowed()
	{
		if(!GateKeeper::isLoginRequired() || GateKeeper::isUserLoggedIn())
			return true;
		return false;
	}

	public static function isUploadAllowed(){
		if(EncodeExplorer::getConfig("upload_enable") == true && GateKeeper::isUserLoggedIn() == true && GateKeeper::getUserStatus() == "admin")
			return true;
		return false;
	}

	public static function isNewdirAllowed(){
		if(EncodeExplorer::getConfig("newdir_enable") == true && GateKeeper::isUserLoggedIn() == true && GateKeeper::getUserStatus() == "admin")
			return true;
		return false;
	}

	public static function isDeleteAllowed(){
		if(EncodeExplorer::getConfig("delete_enable") == true && GateKeeper::isUserLoggedIn() == true && GateKeeper::getUserStatus() == "admin")
			return true;
		return false;
	}

	public static function getUserStatus(){
		if(GateKeeper::isUserLoggedIn() == true && EncodeExplorer::getConfig("users") != null && is_array(EncodeExplorer::getConfig("users"))){
			foreach(EncodeExplorer::getConfig("users") as $user){
				if($user[0] != null && $user[0] == $_SESSION['ee_user_name'])
					return $user[2];
			}
		}
		return null;
	}

	public static function getUserName()
	{
		if(GateKeeper::isUserLoggedIn() == true && isset($_SESSION['ee_user_name']) && strlen($_SESSION['ee_user_name']) > 0)
			return $_SESSION['ee_user_name'];
		if(isset($_SERVER["REMOTE_USER"]) && strlen($_SERVER["REMOTE_USER"]) > 0)
			return $_SERVER["REMOTE_USER"];
		if(isset($_SERVER['PHP_AUTH_USER']) && strlen($_SERVER['PHP_AUTH_USER']) > 0)
			return $_SERVER['PHP_AUTH_USER'];
		return "an anonymous user";
	}

	public static function showLoginBox(){
		if(!GateKeeper::isUserLoggedIn() && count(EncodeExplorer::getConfig("users")) > 0)
			return true;
		return false;
	}
}

//
// The class for any kind of file managing (new folder, upload, etc).
//
class FileManager
{
	function newFolder($location, $dirname)
	{
		global $encodeExplorer;
		if(strlen($dirname) > 0)
		{
			$forbidden = array(".", "/", "\\");
			for($i = 0; $i < count($forbidden); $i++)
			{
				$dirname = str_replace($forbidden[$i], "", $dirname);
			}

			if(!$location->uploadAllowed())
			{
				// The system configuration does not allow uploading here
				$encodeExplorer->setErrorString("upload_not_allowed");
			}
			else if(!$location->isWritable())
			{
				// The target directory is not writable
				$encodeExplorer->setErrorString("upload_dir_not_writable");
			}
			else if(!mkdir($location->getDir(true, false, false, 0).$dirname, EncodeExplorer::getConfig("new_dir_mode")))
			{
				// Error creating a new directory
				$encodeExplorer->setErrorString("new_dir_failed");
			}
			else if(!chmod($location->getDir(true, false, false, 0).$dirname, EncodeExplorer::getConfig("new_dir_mode")))
			{
				// Error applying chmod
				$encodeExplorer->setErrorString("chmod_dir_failed");
			}
			else
			{
				// Directory successfully created, sending e-mail notification
				Logger::logCreation($location->getDir(true, false, false, 0).$dirname, true);
				Logger::emailNotification($location->getDir(true, false, false, 0).$dirname, false);
			}
		}
	}

	function uploadFile($location, $userfile)
	{
		global $encodeExplorer;
		$name = basename($userfile['name']);

		$upload_dir = $location->getFullPath();
		$upload_file = $upload_dir . $name;

		if(function_exists("finfo_open") && function_exists("finfo_file"))
			$mime_type = File::getFileMime($userfile['tmp_name']);
		else
			$mime_type = $userfile['type'];

		$extension = File::getFileExtension($userfile['name']);

		if(!$location->uploadAllowed())
		{
			$encodeExplorer->setErrorString("upload_not_allowed");
		}
		else if(!$location->isWritable())
		{
			$encodeExplorer->setErrorString("upload_dir_not_writable");
		}
		else if(!is_uploaded_file($userfile['tmp_name']))
		{
			$encodeExplorer->setErrorString("failed_upload");
		}
		else if(is_array(EncodeExplorer::getConfig("upload_allow_type")) && count(EncodeExplorer::getConfig("upload_allow_type")) > 0 && !in_array($mime_type, EncodeExplorer::getConfig("upload_allow_type")))
		{
			$encodeExplorer->setErrorString("upload_type_not_allowed");
		}
		else if(is_array(EncodeExplorer::getConfig("upload_reject_extension")) && count(EncodeExplorer::getConfig("upload_reject_extension")) > 0 && in_array($extension, EncodeExplorer::getConfig("upload_reject_extension")))
		{
			$encodeExplorer->setErrorString("upload_type_not_allowed");
		}
		else if(!@move_uploaded_file($userfile['tmp_name'], $upload_file))
		{
			$encodeExplorer->setErrorString("failed_move");
		}
		else
		{
			chmod($upload_file, EncodeExplorer::getConfig("upload_file_mode"));
			Logger::logCreation($location->getDir(true, false, false, 0).$name, false);
			Logger::emailNotification($location->getDir(true, false, false, 0).$name, true);
		}
	}

	public static function delete_dir($dir) {
		if (is_dir($dir)) {
			$objects = scandir($dir);
			foreach ($objects as $object) {
				if ($object != "." && $object != "..") {
					if (filetype($dir."/".$object) == "dir")
						FileManager::delete_dir($dir."/".$object);
					else
						unlink($dir."/".$object);
				}
			}
			reset($objects);
			rmdir($dir);
		}
	}

	public static function delete_file($file){
		if(is_file($file)){
			unlink($file);
		}
	}

	//
	// The main function, checks if the user wants to perform any supported operations
	//
	function run($location)
	{
		if(isset($_POST['userdir']) && strlen($_POST['userdir']) > 0){
			if($location->uploadAllowed() && GateKeeper::isUserLoggedIn() && GateKeeper::isAccessAllowed() && GateKeeper::isNewdirAllowed()){
				$this->newFolder($location, $_POST['userdir']);
			}
		}

		if(isset($_FILES['userfile']['name']) && strlen($_FILES['userfile']['name']) > 0){
			if($location->uploadAllowed() && GateKeeper::isUserLoggedIn() && GateKeeper::isAccessAllowed() && GateKeeper::isUploadAllowed()){
				$this->uploadFile($location, $_FILES['userfile']);
			}
		}

		if(isset($_GET['del'])){
			if(GateKeeper::isUserLoggedIn() && GateKeeper::isAccessAllowed() && GateKeeper::isDeleteAllowed()){
				$split_path = Location::splitPath($_GET['del']);
				$path = "";
				for($i = 0; $i < count($split_path); $i++){
					$path .= $split_path[$i];
					if($i + 1 < count($split_path))
						$path .= "/";
				}
				if($path == "" || $path == "/" || $path == "\\" || $path == ".")
					return;

				if(is_dir($path))
					FileManager::delete_dir($path);
				else if(is_file($path))
					FileManager::delete_file($path);
			}
		}
	}
}

//
// Dir class holds the information about one directory in the list
//
class Dir
{
	var $name;
	var $location;
	var $modTime;

	//
	// Constructor
	//
	function __construct($name, $location)
	{
		$this->name = $name;
		$this->location = $location;

		$this->modTime = filemtime($this->location->getDir(true, false, false, 0).$this->getName());
	}

	function getName()
	{
		return $this->name;
	}

	function getNameHtml()
	{
		return htmlspecialchars($this->name);
	}

	function getNameEncoded()
	{
		return rawurlencode($this->name);
	}

	function getModTime()
	{
		return $this->modTime;
	}

	//
	// Debugging output
	//
	function debug()
	{
		print("Dir name (htmlspecialchars): ".$this->getName()."\n");
		print("Dir location: ".$this->location->getDir(true, false, false, 0)."\n");
		print("Dir modTime: ".$this->modTime."\n");
	}
}

//
// File class holds the information about one file in the list
//
class File
{
	var $name;
	var $location;
	var $size;
	//var $extension;
	var $type;
	var $modTime;

	//
	// Constructor
	//
	function __construct($name, $location)
	{
		$this->name = $name;
		$this->location = $location;

		$this->type = File::getFileType($this->location->getDir(true, false, false, 0).$this->getName());
		$this->size = File::getFileSize($this->location->getDir(true, false, false, 0).$this->getName());
		$this->modTime = filemtime($this->location->getDir(true, false, false, 0).$this->getName());
	}

	function getName()
	{
		return $this->name;
	}

	function getNameEncoded()
	{
		return rawurlencode($this->name);
	}

	function getNameHtml()
	{
		return htmlspecialchars($this->name);
	}

	function getSize()
	{
		return $this->size;
	}

	function getType()
	{
		return $this->type;
	}

	function getModTime()
	{
		return $this->modTime;
	}

	//
	// Determine the size of a file
	//
	public static function getFileSize($file)
	{
		$sizeInBytes = filesize($file);

		// If filesize() fails (with larger files), try to get the size from unix command line.
		if (EncodeExplorer::getConfig("large_files") == true || !$sizeInBytes || $sizeInBytes < 0) {
			$sizeInBytes=exec("ls -l '$file' | awk '{print $5}'");
		}
		return $sizeInBytes;
	}

	public static function getFileType($filepath)
	{
		/*
		 * This extracts the information from the file contents.
		 * Unfortunately it doesn't properly detect the difference between text-based file types.
		 *
		$mime_type = File::getMimeType($filepath);
		$mime_type_chunks = explode("/", $mime_type, 2);
		$type = $mime_type_chunks[1];
		*/
		return File::getFileExtension($filepath);
	}

	public static function getFileMime($filepath)
	{
		$fhandle = finfo_open(FILEINFO_MIME);
		$mime_type = finfo_file($fhandle, $filepath);
		$mime_type_chunks = preg_split('/\s+/', $mime_type);
		$mime_type = $mime_type_chunks[0];
		$mime_type_chunks = explode(";", $mime_type);
		$mime_type = $mime_type_chunks[0];
		return $mime_type;
	}

	public static function getFileExtension($filepath)
	{
		return strtolower(pathinfo($filepath, PATHINFO_EXTENSION));
	}

	//
	// Debugging output
	//
	function debug()
	{
		print("File name: ".$this->getName()."\n");
		print("File location: ".$this->location->getDir(true, false, false, 0)."\n");
		print("File size: ".$this->size."\n");
		print("File modTime: ".$this->modTime."\n");
	}

	function isImage()
	{
		$type = $this->getType();
		if($type == "png" || $type == "jpg" || $type == "gif" || $type == "jpeg")
			return true;
		return false;
	}

	function isPdf()
	{
		if(strtolower($this->getType()) == "pdf")
			return true;
		return false;
	}

	public static function isPdfFile($file)
	{
		if(File::getFileType($file) == "pdf")
			return true;
		return false;
	}

	function isValidForThumb()
	{
		if($this->isImage() || ($this->isPdf() && ImageServer::isEnabledPdf()))
			return true;
		return false;
	}
}

class Location
{
	var $path;

	//
	// Split a file path into array elements
	//
	public static function splitPath($dir)
	{
		$dir = stripslashes($dir);
		$path1 = preg_split("/[\\\\\/]+/", $dir);
		$path2 = array();
		for($i = 0; $i < count($path1); $i++)
		{
			if($path1[$i] == ".." || $path1[$i] == "." || $path1[$i] == "")
				continue;
			$path2[] = $path1[$i];
		}
		return $path2;
	}

	//
	// Get the current directory.
	// Options: Include the prefix ("./"); URL-encode the string; HTML-encode the string; return directory n-levels up
	//
	function getDir($prefix, $encoded, $html, $up)
	{
		$dir = "";
		if($prefix == true)
			$dir .= "./";
		for($i = 0; $i < ((count($this->path) >= $up && $up > 0)?count($this->path)-$up:count($this->path)); $i++)
		{
			$temp = $this->path[$i];
			if($encoded)
				$temp = rawurlencode($temp);
			if($html)
				$temp = htmlspecialchars($temp);
			$dir .= $temp."/";
		}
		return $dir;
	}

	function getPathLink($i, $html)
	{
		if($html)
			return htmlspecialchars($this->path[$i]);
		else
			return $this->path[$i];
	}

	function getFullPath()
	{
		return (strlen(EncodeExplorer::getConfig('basedir')) > 0?EncodeExplorer::getConfig('basedir'):dirname($_SERVER['SCRIPT_FILENAME']))."/".$this->getDir(true, false, false, 0);
	}

	//
	// Debugging output
	//
	function debug()
	{
		print_r($this->path);
		print("Dir with prefix: ".$this->getDir(true, false, false, 0)."\n");
		print("Dir without prefix: ".$this->getDir(false, false, false, 0)."\n");
		print("Upper dir with prefix: ".$this->getDir(true, false, false, 1)."\n");
		print("Upper dir without prefix: ".$this->getDir(false, false, false, 1)."\n");
	}


	//
	// Set the current directory
	//
	function init()
	{
		if(!isset($_GET['dir']) || !is_scalar($_GET['dir']) || strlen($_GET['dir']) == 0)
		{
			$this->path = $this->splitPath(EncodeExplorer::getConfig('starting_dir'));
		}
		else
		{
			$this->path = $this->splitPath($_GET['dir']);
		}
	}

	//
	// Checks if the current directory is below the input path
	//
	function isSubDir($checkPath)
	{
		for($i = 0; $i < count($this->path); $i++)
		{
			if(strcmp($this->getDir(true, false, false, $i), $checkPath) == 0)
				return true;
		}
		return false;
	}

	//
	// Check if uploading is allowed into the current directory, based on the configuration
	//
	function uploadAllowed()
	{
		if(EncodeExplorer::getConfig('upload_enable') != true)
			return false;
		if(EncodeExplorer::getConfig('upload_dirs') == null || count(EncodeExplorer::getConfig('upload_dirs')) == 0)
			return true;

		$upload_dirs = EncodeExplorer::getConfig('upload_dirs');
		for($i = 0; $i < count($upload_dirs); $i++)
		{
			if($this->isSubDir($upload_dirs[$i]))
				return true;
		}
		return false;
	}

	function isWritable()
	{
		return is_writable($this->getDir(true, false, false, 0));
	}

	public static function isDirWritable($dir)
	{
		return is_writable($dir);
	}

	public static function isFileWritable($file)
	{
		if(file_exists($file))
		{
			if(is_writable($file))
				return true;
			else
				return false;
		}
		else if(Location::isDirWritable(dirname($file)))
			return true;
		else
			return false;
	}
}

class EncodeExplorer
{
	var $location;
	var $dirs;
	var $files;
	var $sort_by;
	var $sort_as;
	var $logging;
	var $spaceUsed;
	var $lang;
	var $mobile;

	//
	// Determine sorting, calculate space.
	//
	function init()
	{
		global $_TRANSLATIONS;

		// Here we filter the comparison function (sort by) and comparison order (sort as) chosen by user
		$this->sort_by = (isset($_GET['sort_by']) && in_array($_GET['sort_by'], array('name', 'size', 'mod'))) ? $_GET['sort_by'] : 'name';
		$this->sort_as = (isset($_GET['sort_as']) && in_array($_GET['sort_as'], array('asc', 'desc'))) ? $_GET['sort_as'] : 'asc';

		// Mitigate date.timezone warning
		if(function_exists('date_default_timezone_get') && function_exists('date_default_timezone_set'))
		{
			@date_default_timezone_set(date_default_timezone_get());
		}

		if(isset($_GET['lang']) && is_scalar($_GET['lang']) && isset($_TRANSLATIONS[$_GET['lang']]))
			$this->lang = $_GET['lang'];
		else
			$this->lang = EncodeExplorer::getConfig("lang");

		$this->mobile = false;
		if(EncodeExplorer::getConfig("mobile_enabled") == true)
		{
			if((EncodeExplorer::getConfig("mobile_default") == true || isset($_GET['m'])) && !isset($_GET['s']))
				$this->mobile = true;
		}

		$this->logging = false;
		if(EncodeExplorer::getConfig("log_file") != null && strlen(EncodeExplorer::getConfig("log_file")) > 0)
			$this->logging = true;
	}

	//
	// Read the file list from the directory
	//
	function readDir()
	{
		global $encodeExplorer;
		//
		// Reading the data of files and directories
		//
		if($open_dir = @opendir($this->location->getFullPath()))
		{
			$this->dirs = array();
			$this->files = array();
			while (false !== ($object = readdir($open_dir)))
			{
				if($object != "." && $object != "..")
				{
					if(is_dir($this->location->getDir(true, false, false, 0)."/".$object))
					{
						if(!in_array($object, EncodeExplorer::getConfig('hidden_dirs')))
							$this->dirs[] = new Dir($object, $this->location);
					}
					else if(!in_array($object, EncodeExplorer::getConfig('hidden_files')))
						$this->files[] = new File($object, $this->location);
				}
			}
			closedir($open_dir);
		}
		else
		{
			$encodeExplorer->setErrorString("unable_to_read_dir");;
		}
	}

	//
	// A recursive function for calculating the total used space
	//
	function sum_dir($start_dir, $ignore_files, $levels = 1)
	{
		if ($dir = opendir($start_dir))
		{
			$total = 0;
			while (false !== ($file = readdir($dir)))
			{
				if (!in_array($file, $ignore_files))
				{
					if ((is_dir($start_dir . '/' . $file)) && ($levels - 1 >= 0))
					{
						$total += $this->sum_dir($start_dir . '/' . $file, $ignore_files, $levels-1);
					}
					elseif (is_file($start_dir . '/' . $file))
					{
						$total += File::getFileSize($start_dir . '/' . $file) / 1024;
					}
				}
			}

			closedir($dir);
			return $total;
		}
	}

	function calculateSpace()
	{
		if(EncodeExplorer::getConfig('calculate_space_level') <= 0)
			return;
		$ignore_files = array('..', '.');
		$start_dir = getcwd();
		$spaceUsed = $this->sum_dir($start_dir, $ignore_files, EncodeExplorer::getConfig('calculate_space_level'));
		$this->spaceUsed = round($spaceUsed/1024, 3);
	}

	function sort()
	{
		// Here we filter the comparison functions supported by our directory object
		$sort_by = in_array($this->sort_by, array('name', 'mod')) ? $this->sort_by : 'name';

		if(is_array($this->dirs)) {
			usort($this->dirs, array('EncodeExplorer', 'cmp_'.$sort_by));
			if($this->sort_as == "desc") {
				$this->dirs = array_reverse($this->dirs);
			}
		}

		// Here we filter the comparison functions supported by our file object
		$sort_by = in_array($this->sort_by, array('name', 'size', 'mod')) ? $this->sort_by : 'name';

		if(is_array($this->files)) {
			usort($this->files, array('EncodeExplorer', 'cmp_'.$sort_by));
			if($this->sort_as == "desc") {
				$this->files = array_reverse($this->files);
			}
		}
	}

	function makeArrow($sort_by)
	{
		// Ability to reverse the 'sort as' selected for the current field
		// And propagate the current selected 'sort as' to the other fields
		$sort_as = ($this->sort_as == "asc") ? "desc" : "asc";
		$sort_as = ($this->sort_by == $sort_by) ? $sort_as : $this->sort_as;

		// Only show image for the currently selected 'sort as' field
		$img = ($this->sort_as == "asc") ? "arrow_up" : "arrow_down";
		$img = ($this->sort_by == $sort_by) ? "<img style=\"border:0;\" alt=\"".$sort_as."\" src=\"?img=".$img."\">" : "&nbsp;";

		if($sort_by == "name")
			$text = $this->getString("file_name");
		else if($sort_by == "size")
			$text = $this->getString("size");
		else if($sort_by == "mod")
			$text = $this->getString("last_changed");

		return "<a href=\"".$this->makeLink(false, false, $sort_by, $sort_as, null, $this->location->getDir(false, true, false, 0))."\">{$text}{$img}</a>";
	}

	function makeLink($switchVersion, $logout, $sort_by, $sort_as, $delete, $dir)
	{
		$link = "?";
		if($switchVersion == true && EncodeExplorer::getConfig("mobile_enabled") == true)
		{
			if($this->mobile == false)
				$link .= "m&amp;";
			else
				$link .= "s&amp;";
		}
		else if($this->mobile == true && EncodeExplorer::getConfig("mobile_enabled") == true && EncodeExplorer::getConfig("mobile_default") == false)
			$link .= "m&amp;";
		else if($this->mobile == false && EncodeExplorer::getConfig("mobile_enabled") == true && EncodeExplorer::getConfig("mobile_default") == true)
			$link .= "s&amp;";

		if($logout == true)
		{
			$link .= "logout";
			return $link;
		}

		if(isset($this->lang) && $this->lang != EncodeExplorer::getConfig("lang"))
			$link .= "lang=".$this->lang."&amp;";

		if($sort_by != null && strlen($sort_by) > 0)
			$link .= "sort_by=".$sort_by."&amp;";

		if($sort_as != null && strlen($sort_as) > 0)
			$link .= "sort_as=".$sort_as."&amp;";

		$link .= "dir=".$dir;
		if($delete != null)
			$link .= "&amp;del=".$delete;
		return $link;
	}

	function makeIcon($l)
	{
		$l = strtolower($l);
		return "?img=".$l;
	}

	function formatModTime($time)
	{
		$timeformat = "d/m/y H:i:s";
		if(EncodeExplorer::getConfig("time_format") != null && strlen(EncodeExplorer::getConfig("time_format")) > 0)
			$timeformat = EncodeExplorer::getConfig("time_format");
		return date($timeformat, $time);
	}

	function formatSize($size)
	{
		$sizes = array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB');
		$y = $sizes[0];
		for ($i = 1; (($i < count($sizes)) && ($size >= 1024)); $i++)
		{
			$size = $size / 1024;
			$y  = $sizes[$i];
		}
		return round($size, 2)." ".$y;
	}

	//
	// Debugging output
	//
	function debug()
	{
		print("Explorer location: ".$this->location->getDir(true, false, false, 0)."\n");
		for($i = 0; $i < count($this->dirs); $i++)
			$this->dirs[$i]->output();
		for($i = 0; $i < count($this->files); $i++)
			$this->files[$i]->output();
	}

	//
	// Comparison functions for sorting.
	//

	public static function cmp_name($a, $b)
	{
		return strnatcasecmp($a->name, $b->name);
	}

	public static function cmp_size($a, $b)
	{
		return ($a->size - $b->size);
	}

	public static function cmp_mod($a, $b)
	{
		return ($a->modTime - $b->modTime);
	}

	//
	// The function for getting a translated string.
	// Falls back to english if the correct language is missing something.
	//
	public static function getLangString($stringName, $lang)
	{
		global $_TRANSLATIONS;
		if(isset($_TRANSLATIONS[$lang]) && is_array($_TRANSLATIONS[$lang])
			&& isset($_TRANSLATIONS[$lang][$stringName]))
			return $_TRANSLATIONS[$lang][$stringName];
		else if(isset($_TRANSLATIONS["en"]))// && is_array($_TRANSLATIONS["en"])
			//&& isset($_TRANSLATIONS["en"][$stringName]))
			return $_TRANSLATIONS["en"][$stringName];
		else
			return "Translation error";
	}

	function getString($stringName)
	{
		return EncodeExplorer::getLangString($stringName, $this->lang);
	}

	//
	// The function for getting configuration values
	//
	public static function getConfig($name)
	{
		global $_CONFIG;
		if(isset($_CONFIG, $_CONFIG[$name]))
			return $_CONFIG[$name];
		return null;
	}

	public static function setError($message)
	{
		global $_ERROR;
		if(isset($_ERROR) && strlen($_ERROR) > 0)
			;// keep the first error and discard the rest
		else
			$_ERROR = $message;
	}

	function setErrorString($stringName)
	{
		EncodeExplorer::setError($this->getString($stringName));
	}

	//
	// Main function, activating tasks
	//
	function run($location)
	{
		$this->location = $location;
		$this->calculateSpace();
		$this->readDir();
		$this->sort();
		$this->outputHtml();
	}

	public function printLoginBox()
	{
		?>
		<div id="login">
		<form enctype="multipart/form-data" action="<?php print $this->makeLink(false, false, null, null, null, ""); ?>" method="post" class="form-horizontal" role="form">
		<?php
		if(GateKeeper::isLoginRequired())
		{
			$require_username = false;
			foreach(EncodeExplorer::getConfig("users") as $user){
				if($user[0] != null && strlen($user[0]) > 0){
					$require_username = true;
					break;
				}
			}
			if($require_username)
			{
			?>
			<div class="form-group"><label for="user_name" class="col-sm-2 control-label"><?php print $this->getString("username"); ?></label>
                        <div class="col-sm-8"><input type="text" name="user_name" value="" id="user_name" class="form-control" required></div></div>
			<?php
			}
			?>
			<div class="form-group"><label for="user_pass" class="col-sm-2 control-label"><?php print $this->getString("password"); ?></label>
                        <div class="col-sm-8"><input type="password" name="user_pass" id="user_pass" class="form-control" required></div></div>
                        <div class="form-group"><div class="col-sm-offset-2 col-sm-8">
			<button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-log-in"></span> <?php print $this->getString("log_in"); ?></button>
			</div></div>
		</form>
		</div>
	<?php
		}
	}

	//
	// Printing the actual page
	//
	function outputHtml()
	{
		global $_ERROR;
		global $_START_TIME;
		global $_CONFIG;
?>
<!DOCTYPE HTML>
<html lang="<?php print $this->getConfig('lang'); ?>">
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=<?php print $this->getConfig('charset'); ?>">
<?php css(); ?>
<meta charset="<?php print $this->getConfig('charset'); ?>">
<?php
if(($this->getConfig('log_file') != null && strlen($this->getConfig('log_file')) > 0)
	|| ($this->getConfig('thumbnails') != null && $this->getConfig('thumbnails') == true)
	|| (GateKeeper::isDeleteAllowed()))
{

if (is_array($_CONFIG["javascript"])) {
	foreach ($_CONFIG["javascript"] as $value)
		print "<script type=\"text/javascript\" src=\"" . $value . "\"></script>\n";
} else
	print "<script type=\"text/javascript\" src=\"" . $_CONFIG["javascript"] . "\"></script>\n";
?>
<script type="text/javascript">
//<![CDATA[
$(document).ready(function() {
<?php
	if(GateKeeper::isDeleteAllowed()){
?>
	$('td.del a').click(function(){
		var answer = confirm('<?php print $this->getString("sure_del"); ?>: \'' + $(this).attr("data-name") + "\' ?");
		return answer;
	});
<?php
	}
	if($this->logging == true)
	{
?>
		function logFileClick(path)
		{
			 $.ajax({
					async: false,
					type: "POST",
					data: {log: path},
					contentType: "application/x-www-form-urlencoded; charset=UTF-8",
					cache: false
				});
		}

		$("a.file").click(function(){
			logFileClick("<?php print $this->location->getDir(true, true, false, 0);?>" + $(this).html());
			return true;
		});
<?php
	}
	if(EncodeExplorer::getConfig("thumbnails") == true && $this->mobile == false)
	{
?>
		function positionThumbnail(e) {
			xOffset = 30;
			yOffset = 10;
			$("#thumb").css("left",(e.clientX + xOffset) + "px");

			diff = 0;
			if(e.clientY + $("#thumb").height() > $(window).height())
				diff = e.clientY + $("#thumb").height() - $(window).height();

			$("#thumb").css("top",(e.pageY - yOffset - diff) + "px");
		}

		$("a.thumb").hover(function(e){
			$("#thumb").remove();
			$("body").append("<div id=\"thumb\"><img src=\"?thumb="+ $(this).attr("href") +"\" alt=\"Preview\"><\/div>");
			positionThumbnail(e);
			$("#thumb").fadeIn("medium");
		},
		function(){
			$("#thumb").remove();
		});

		$("a.thumb").mousemove(function(e){
			positionThumbnail(e);
			});

		$("a.thumb").click(function(e){$("#thumb").remove(); return true;});
<?php
	}
?>
	});
//]]>
</script>
<?php
}
?>
<title><?php if(EncodeExplorer::getConfig('main_title') != null) print strip_tags(EncodeExplorer::getConfig('main_title')); ?></title>
</head>
<body>
<div class="container"><div class="row"><div class="col-sm-12">
<?php
//
// Print the error (if there is something to print)
//
if(isset($_ERROR) && strlen($_ERROR) > 0)
{
	print "<div id=\"error\" class=\"alert alert-danger\"><span class=\"glyphicon glyphicon-exclamation-sign\"></span> ".$_ERROR."</div>";
}
?>

<div id="frame">
<?php
if(EncodeExplorer::getConfig('show_top') == true)
{
?>
<h1 id="top">
    <a href="<?php print $this->makeLink(false, false, null, null, null, ""); ?>"><?php if(EncodeExplorer::getConfig('main_title') != null) print EncodeExplorer::getConfig('main_title'); ?></a>
<?php
if(EncodeExplorer::getConfig("secondary_titles") != null && is_array(EncodeExplorer::getConfig("secondary_titles")) && count(EncodeExplorer::getConfig("secondary_titles")) > 0)
{
	$secondary_titles = EncodeExplorer::getConfig("secondary_titles");
	print "<br><small>".$secondary_titles[array_rand($secondary_titles)]."</small>\n";
}
?>
</h1>
<?php
}

// Checking if the user is allowed to access the page, otherwise showing the login box
if(!GateKeeper::isAccessAllowed())
{
	$this->printLoginBox();
}
else
{
if(EncodeExplorer::getConfig("show_path") == true)
{
?>
<ol class="breadcrumb">
<?php $cnt = count($this->location->path);
$root = $this->getString("root");
$root = "<span class=\"glyphicon glyphicon-home\"></span> ".$root;
if($cnt != 0) $root = "<a href=\"?dir=\">".$root."</a>";
?>
<li<?php if($cnt == 0) print " class=\"active\""; ?>><?php print $root ?></li>

<?php
	for($i = 0; $i < $cnt; $i++)
	{
		print "<li";
                if($i == ($cnt-1)) {
                    print " class=\"active\">" . $this->location->getPathLink($i, true);
                } else {
                    print "><a href=\"".$this->makeLink(false, false, null, null, null, $this->location->getDir(false, true, false, $cnt - $i - 1))."\">";
                    print $this->location->getPathLink($i, true);
                    print "</a>";
                }
                print "</li>";
	}
?>
</ol>
<?php
}
?>

<!-- START: List table -->
<table class="table table-striped">
<thead>
	<tr class="row header">
		<th class="icon" width="5%"></th>
		<th class="name" width="<?php print GateKeeper::isDeleteAllowed()?55:60; ?>%"><?php print $this->makeArrow("name");?></th>
		<th class="size" width="15%"><?php print $this->makeArrow("size"); ?></th>
		<th class="changed" width="20%"><?php print $this->makeArrow("mod"); ?></th>
<?php if(GateKeeper::isDeleteAllowed()){?>
		<th class="del text-danger" width="5%"><?php print EncodeExplorer::getString("del"); ?></th>
<?php } ?>
	</tr>
</thead>
<tbody>
<?php
$row = empty($this->location->path);
/* Skip showing [..] for root */
if (!$row) {  ?>
<tr class="row two">
	<?php $url = $this->makeLink(false, false, null, null, null, $this->location->getDir(false, true, false, 1)); ?>
	<th class="icon"><a class="item" href="<?php print $url; ?>"><img alt="dir" src="?img=directory"></a></th>
	<td colspan="<?php print ((GateKeeper::isDeleteAllowed()?4:3)); ?>" class="long">
		<a class="item" href="<?php print $url; ?>">..</a>
	</td>
</tr>
<?php
}
//
// Ready to display folders and files.
//

//
// Folders first
//
if($this->dirs)
{
	foreach ($this->dirs as $dir)
	{
		$row_style = ($row ? "one" : "two");
		$url = $this->makeLink(false, false, null, null, null, $this->location->getDir(false, true, false, 0).$dir->getNameEncoded());
		print "\t<tr class=\"row ".$row_style."\">\n";
		print "\t\t<th class=\"icon\">";
		print "<a href=\"".$url."\" class=\"item dir\">";
		print "<img alt=\"dir\" src=\"?img=directory\">";
		print "</a>";
		print "</th>\n";
		print "\t\t<td class=\"name\" colspan=\"2\">";
		print "<a href=\"".$url."\" class=\"item dir\">";
		print $dir->getNameHtml();
		print "</a>";
		if(EncodeExplorer::getConfig('show_dir_link') == true) {
			print "\t\t<a href=\"".$this->location->getDir(false, true, false, 0).$dir->getNameEncoded()."\" class=\"item dirlink pull-right\"><span class=\"label label-info label-text\"><span class=\"glyphicon glyphicon-folder-open\"></span> " . $dir->getNameHtml() . "</span></a>";
		}
		print "</td>\n";

		print "\t\t<td class=\"changed\">".$this->formatModTime($dir->getModTime())."</td>\n";

		if(GateKeeper::isDeleteAllowed()){
			print "<td class=\"del\"><a data-name=\"".htmlentities($dir->getName())."\" href=\"".$this->makeLink(false, false, null, null, $this->location->getDir(false, true, false, 0).$dir->getNameEncoded(), $this->location->getDir(false, true, false, 0))."\" class=\"btn btn-xs btn-danger\">"
					. "<span class=\"glyphicon glyphicon-trash\"></span>"
					. "</a></td>";
		}
		print "\t</tr>\n";
		$row =! $row;
	}
}

//
// Now the files
//
if($this->files)
{
	$count = 0;
	foreach ($this->files as $file)
	{
		$row_style = ($row ? "one" : "two");
		$url = $this->location->getDir(false, true, false, 0).$file->getNameEncoded();
		print "\t<tr class=\"row ".$row_style.(++$count == count($this->files)?" last":"")."\">\n";
		print "\t\t<th class=\"icon\">";
		print "<a href=\"".$url."\">";
		print "<img alt=\"".$file->getType()."\" src=\"".$this->makeIcon($file->getType())."\">";
		print "</a>";
		print "</th>\n";
		print "\t\t<td class=\"name\">";
		print "<a href=\"".$url."\"";
		if(EncodeExplorer::getConfig('open_in_new_window') == true)
			print " target=\"_blank\"";
		print " class=\"item file";
		if($file->isValidForThumb())
			print " thumb";
		print "\"";
		if(EncodeExplorer::getConfig('force_download') == true)
			print " download";
		print ">";
		print $file->getNameHtml();
		print "</a>";
		print "</td>\n";
                print "\t\t<td class=\"size\">".$this->formatSize($file->getSize())."</td>\n";
		print "\t\t<td class=\"changed\">".$this->formatModTime($file->getModTime())."</td>\n";
		if(GateKeeper::isDeleteAllowed()){
			print "\t\t<td class=\"del\">" .
				"<a data-name=\"".htmlentities($file->getName())."\" href=\"".$this->makeLink(false, false, null, null, $this->location->getDir(false, true, false, 0).$file->getNameEncoded(), $this->location->getDir(false, true, false, 0))."\" class=\"btn btn-xs btn-danger\">" .
				"<span class=\"glyphicon glyphicon-trash\"></span>" .
				"</a></td>";
		}
		print "\t</tr>\n";
		$row =! $row;
	}
}


//
// The files and folders have been displayed
//
?>
</tbody>
</table>
<!-- END: List table -->
<?php
}
?>
</div>

<?php
if(GateKeeper::isAccessAllowed() && GateKeeper::showLoginBox()){
?>
<!-- START: Login area -->
<div id="login">
<form enctype="multipart/form-data" method="post" class="form-inline" role="form">
	<div class="form-group">
	  <label class="sr-only" for="user_name"><?php print $this->getString("username"); ?></label>
          <input type="text" class="form-control" name="user_name" value="" id="user_name" placeholder="<?php print $this->getString("username"); ?>" required>
        </div>
        <div class="form-group">
	  <label class="sr-only" for="user_pass"><?php print $this->getString("password"); ?></label>
          <input type="password" class="form-control" name="user_pass" id="user_pass" placeholder="<?php print $this->getString("password"); ?>" required>
        </div>
	<button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-log-in"></span> <?php print $this->getString("log_in"); ?></button>
</form>
</div>
<!-- END: Login area -->
<?php
}

if(GateKeeper::isAccessAllowed() && $this->location->uploadAllowed() && (GateKeeper::isUploadAllowed() || GateKeeper::isNewdirAllowed()))
{
?>
<!-- START: Upload area -->
<div id="upload">
	<?php
	if(GateKeeper::isNewdirAllowed()){
	?>
	<form method="post" class="form-inline" role="form">
		<div id="newdir_container form-group">
			<div class="form-group"><input name="userdir" type="text" class="upload_dirname form-control" required></div>
			<button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-folder-close"></span> <?php print $this->getString("make_directory"); ?></button>
		</div>
        </form>
	<?php
	}
        if(GateKeeper::isNewdirAllowed() && GateKeeper::isUploadAllowed()){
            print "<br>";
        }
	if(GateKeeper::isUploadAllowed()){
	?>
	<form enctype="multipart/form-data" method="post" class="form-inline" role="form">
		<div id="upload_container">
			<div class="form-group"><input name="userfile" type="file" class="upload_file" required></div>
			<button type="submit" class="upload_sumbit btn btn-default"><span class="glyphicon glyphicon-upload"></span> <?php print $this->getString("upload"); ?></button>
		</div>
	</form>
	<?php
	}
	?>
</div>
<!-- END: Upload area -->
<?php
}

?>
<!-- START: Info area -->
<small id="info" class="text-muted">
<?php
if(GateKeeper::isUserLoggedIn())
	print "<a href=\"".$this->makeLink(false, true, null, null, null, "")."\"><span class=\"glyphicon glyphicon-log-out\"></span> ".$this->getString("log_out")."</a> &squf; ";

if(GateKeeper::isAccessAllowed() && $this->getConfig("calculate_space_level") > 0)
{
	print $this->getString("total_used_space").": ".$this->spaceUsed." MB &squf; ";
}
if($this->getConfig("show_load_time") == true)
{
	printf($this->getString("page_load_time")." &squf; ", (microtime(TRUE) - $_START_TIME)*1000);
}
?>
<a href="https://github.com/vinorodrigues/encode-explorer">Encode Explorer</a> (BS3)
</small>
<!-- END: Info area -->
</div></div></div>
</body>
</html>

<?php
	}
}

//
// This is where the system is activated.
// We check if the user wants an image and show it. If not, we show the explorer.
//
$encodeExplorer = new EncodeExplorer();
$encodeExplorer->init();

GateKeeper::init();

if(!ImageServer::showImage() && !Logger::logQuery())
{
	$location = new Location();
	$location->init();
	if(GateKeeper::isAccessAllowed())
	{
		Logger::logAccess($location->getDir(true, false, false, 0), true);
		$fileManager = new FileManager();
		$fileManager->run($location);
	}
	$encodeExplorer->run($location);
}
?>