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