<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @author Jakob Sack
* @copyright 2010 Frank Karlitschek karlitschek@kde.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* Collection of useful functions
*/
class OC_Helper {
/**
* @brief Creates an url
* @param $app app
* @param $file file
* @param $redirect_url redirect_url variable is appended to the URL
* @returns the url
*
* Returns a url to the given app and file.
*/
public static function linkTo( $app, $file, $redirect_url=NULL, $absolute=false ){
if( $app != '' ){
$app .= '/';
// Check if the app is in the app folder
if( file_exists( OC::$SERVERROOT . '/apps/'. $app.$file )){
$urlLinkTo = OC::$WEBROOT . '/apps/' . $app . $file;
}
else{
$urlLinkTo = OC::$WEBROOT . '/' . $app . $file;
}
}
else{
if( file_exists( OC::$SERVERROOT . '/core/'. $file )){
$urlLinkTo = OC::$WEBROOT . '/core/'.$file;
}
else{
$urlLinkTo = OC::$WEBROOT . '/'.$file;
}
}
if($absolute){
// Checking if the request was made through HTTPS. The last in line is for IIS
$protocol = isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS']) && ($_SERVER['HTTPS']!='off');
$urlLinkTo = ($protocol?'https':'http') . '://' . $_SERVER['HTTP_HOST'] . $urlLinkTo;
}
if($redirect_url)
return $urlLinkTo.'?redirect_url='.urlencode($_SERVER["REQUEST_URI"]);
else
return $urlLinkTo;
}
/**
* @brief Creates path to an image
* @param $app app
* @param $image image name
* @returns the url
*
* Returns the path to the image.
*/
public static function imagePath( $app, $image ){
// Check if the app is in the app folder
if( file_exists( OC::$SERVERROOT."/apps/$app/img/$image" )){
return OC::$WEBROOT."/apps/$app/img/$image";
}
elseif( !empty( $app )){
return OC::$WEBROOT."/$app/img/$image";
}
else{
return OC::$WEBROOT."/core/img/$image";
}
}
/**
* @brief get path to icon of file type
* @param $mimetype mimetype
* @returns the url
*
* Returns the path to the image of this file type.
*/
public static function mimetypeIcon( $mimetype ){
$alias=array('application/xml'=>'code/xml');
// echo $mimetype;
if(isset($alias[$mimetype])){
$mimetype=$alias[$mimetype];
// echo $mimetype;
}
// Replace slash with a minus
$mimetype = str_replace( "/", "-", $mimetype );
// Is it a dir?
if( $mimetype == "dir" ){
return OC::$WEBROOT."/core/img/filetypes/folder.png";
}
// Icon exists?
if( file_exists( OC::$SERVERROOT."/core/img/filetypes/$mimetype.png" )){
return OC::$WEBROOT."/core/img/filetypes/$mimetype.png";
}
//try only the first part of the filetype
$mimetype=substr($mimetype,0,strpos($mimetype,'-'));
if( file_exists( OC::$SERVERROOT."/core/img/filetypes/$mimetype.png" )){
return OC::$WEBROOT."/core/img/filetypes/$mimetype.png";
}
else{
return OC::$WEBROOT."/core/img/filetypes/file.png";
}
}
/**
* @brief Make a human file size
* @param $bytes file size in bytes
* @returns a human readable file size
*
* Makes 2048 to 2 kB.
*/
public static function humanFileSize( $bytes ){
if( $bytes < 1024 ){
return "$bytes B";
}
$bytes = round( $bytes / 1024, 1 );
if( $bytes < 1024 ){
return "$bytes kB";
}
$bytes = round( $bytes / 1024, 1 );
if( $bytes < 1024 ){
return "$bytes MB";
}
// Wow, heavy duty for owncloud
$bytes = round( $bytes / 1024, 1 );
return "$bytes GB";
}
/**
* @brief Make a computer file size
* @param $str file size in a fancy format
* @returns a file size in bytes
*
* Makes 2kB to 2048.
*
* Inspired by: http://www.php.net/manual/en/function.filesize.php#92418
*/
public static function computerFileSize( $str ){
$bytes = 0;
$str=strtolower($str);
$bytes_array = array(
'b' => 1,
'k' => 1024,
'kb' => 1024,
'mb' => 1024 * 1024,
'm' => 1024 * 1024,
'gb' => 1024 * 1024 * 1024,
'g' => 1024 * 1024 * 1024,
'tb' => 1024 * 1024 * 1024 * 1024,
't' => 1024 * 1024 * 1024 * 1024,
'pb' => 1024 * 1024 * 1024 * 1024 * 1024,
'p' => 1024 * 1024 * 1024 * 1024 * 1024,
);
$bytes = floatval($str);
if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) {
$bytes *= $bytes_array[$matches[1]];
}
$bytes = intval(round($bytes, 2));
return $bytes;
}
/**
* @brief Recusive editing of file permissions
* @param $path path to file or folder
* @param $filemode unix style file permissions as integer
*
*/
static function chmodr($path, $filemode) {
if (!is_dir($path))
return chmod($path, $filemode);
$dh = opendir($path);
while (($file = readdir($dh)) !== false) {
if($file != '.' && $file != '..') {
$fullpath = $path.'/'.$file;
if(is_link($fullpath))
return FALSE;
elseif(!is_dir($fullpath) && !chmod($fullpath, $filemode))
return FALSE;
elseif(!self::chmodr($fullpath, $filemode))
return FALSE;
}
}
closedir($dh);
if(@chmod($path, $filemode))
return TRUE;
else
return FALSE;
}
/**
* @brief Recusive copying of folders
* @param string $src source folder
* @param string $dest target folder
*
*/
static function copyr($src, $dest) {
if(is_dir($src)){
if(!is_dir($dest)){
mkdir($dest);
}
$files = scandir($src);
foreach ($files as $file){
if ($file != "." && $file != ".."){
self::copyr("$src/$file", "$dest/$file");
}
}
}elseif(file_exists($src)){
copy($src, $dest);
}
}
/**
* @brief Recusive deletion of folders
* @param string $dir path to the folder
*
*/
static function rmdirr($dir) {
if(is_dir($dir)) {
$files=scandir($dir);
foreach($files as $file){
if ($file != "." && $file != ".."){
self::rmdirr("$dir/$file");
}
}
rmdir($dir);
}elseif(file_exists($dir)){
unlink($dir);
}
}
/**
* @brief Checks $_REQUEST contains a var for the $s key. If so, returns the html-escaped value of this var; otherwise returns the default value provided by $d.
* @param $s name of the var to escape, if set.
* @param $d default value.
* @returns the print-safe value.
*
*/
//FIXME: should also check for value validation (i.e. the email is an email).
public static function init_var($s, $d="") {
$r = $d;
if(isset($_REQUEST[$s]) && !empty($_REQUEST[$s]))
$r = stripslashes(htmlspecialchars($_REQUEST[$s]));
return $r;
}
/**
* returns "checked"-attribut if request contains selected radio element OR if radio element is the default one -- maybe?
* @param string $s Name of radio-button element name
* @param string $v Value of current radio-button element
* @param string $d Value of default radio-button element
*/
public static function init_radio($s, $v, $d) {
if((isset($_REQUEST[$s]) && $_REQUEST[$s]==$v) || (!isset($_REQUEST[$s]) && $v == $d))
print "checked=\"checked\" ";
}
/**
* detect if a given program is found in the search PATH
*
* @param string program name
* @param string optional search path, defaults to $PATH
* @return bool true if executable program found in path
*/
public static function canExecute($name, $path = false){
// path defaults to PATH from environment if not set
if ($path === false) {
$path = getenv("PATH");
}
// check method depends on operating system
if (!strncmp(PHP_OS, "WIN", 3)) {
// on Windows an appropriate COM or EXE file needs to exist
$exts = array(".exe", ".com");
$check_fn = "file_exists";
} else {
// anywhere else we look for an executable file of that name
$exts = array("");
$check_fn = "is_executable";
}
// Default check will be done with $path directories :
$dirs = explode(PATH_SEPARATOR, $path);
// WARNING : We have to check if open_basedir is enabled :
$obd = ini_get('open_basedir');
if($obd != "none")
$obd_values = explode(PATH_SEPARATOR, $obd);
if(count($obd_values) > 0 and $obd_values[0])
{
// open_basedir is in effect !
// We need to check if the program is in one of these dirs :
$dirs = $obd_values;
}
foreach($dirs as $dir)
{
foreach($exts as $ext)
{
if($check_fn("$dir/$name".$ext))
return true;
}
}
return false;
}
}