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+<?php
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Ardinis <Ardinis@users.noreply.github.com>
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ * @author Bart Visscher <bartv@thisnet.nl>
+ * @author Björn Schießle <bjoern@schiessle.org>
+ * @author Christoph Wurst <christoph@winzerhof-wurst.at>
+ * @author Clark Tomlinson <fallen013@gmail.com>
+ * @author Daniel Kesselberg <mail@danielkesselberg.de>
+ * @author Felix Moeller <mail@felixmoeller.de>
+ * @author Jakob Sack <mail@jakobsack.de>
+ * @author Jan-Christoph Borchardt <hey@jancborchardt.net>
+ * @author Joas Schilling <coding@schilljs.com>
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Julius Härtl <jus@bitgrid.net>
+ * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Olivier Paroz <github@oparoz.com>
+ * @author Pellaeon Lin <nfsmwlin@gmail.com>
+ * @author RealRancor <fisch.666@gmx.de>
+ * @author Robin Appelman <robin@icewind.nl>
+ * @author Robin McCorkell <robin@mccorkell.me.uk>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ * @author Simon Könnecke <simonkoennecke@gmail.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Thomas Tanghus <thomas@tanghus.net>
+ * @author Vincent Petry <pvince81@owncloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+use OCP\IUser;
+use Symfony\Component\Process\ExecutableFinder;
+
+/**
+ * Collection of useful functions
+ */
+class OC_Helper {
+ private static $templateManager;
+
+ /**
+ * Make a human file size
+ * @param int $bytes file size in bytes
+ * @return string a human readable file size
+ *
+ * Makes 2048 to 2 kB.
+ */
+ public static function humanFileSize($bytes) {
+ if ($bytes < 0) {
+ return "?";
+ }
+ if ($bytes < 1024) {
+ return "$bytes B";
+ }
+ $bytes = round($bytes / 1024, 0);
+ if ($bytes < 1024) {
+ return "$bytes KB";
+ }
+ $bytes = round($bytes / 1024, 1);
+ if ($bytes < 1024) {
+ return "$bytes MB";
+ }
+ $bytes = round($bytes / 1024, 1);
+ if ($bytes < 1024) {
+ return "$bytes GB";
+ }
+ $bytes = round($bytes / 1024, 1);
+ if ($bytes < 1024) {
+ return "$bytes TB";
+ }
+
+ $bytes = round($bytes / 1024, 1);
+ return "$bytes PB";
+ }
+
+ /**
+ * Make a computer file size
+ * @param string $str file size in human readable format
+ * @return float|bool a file size in bytes
+ *
+ * Makes 2kB to 2048.
+ *
+ * Inspired by: http://www.php.net/manual/en/function.filesize.php#92418
+ */
+ public static function computerFileSize($str) {
+ $str = strtolower($str);
+ if (is_numeric($str)) {
+ return (float)$str;
+ }
+
+ $bytes_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,
+ ];
+
+ $bytes = (float)$str;
+
+ if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) {
+ $bytes *= $bytes_array[$matches[1]];
+ } else {
+ return false;
+ }
+
+ $bytes = round($bytes);
+
+ return $bytes;
+ }
+
+ /**
+ * Recursive 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) && !\OC\Files\Filesystem::isFileBlacklisted($src)) {
+ copy($src, $dest);
+ }
+ }
+
+ /**
+ * Recursive deletion of folders
+ * @param string $dir path to the folder
+ * @param bool $deleteSelf if set to false only the content of the folder will be deleted
+ * @return bool
+ */
+ static function rmdirr($dir, $deleteSelf = true) {
+ if (is_dir($dir)) {
+ $files = new RecursiveIteratorIterator(
+ new RecursiveDirectoryIterator($dir, RecursiveDirectoryIterator::SKIP_DOTS),
+ RecursiveIteratorIterator::CHILD_FIRST
+ );
+
+ foreach ($files as $fileInfo) {
+ /** @var SplFileInfo $fileInfo */
+ if ($fileInfo->isLink()) {
+ unlink($fileInfo->getPathname());
+ } else if ($fileInfo->isDir()) {
+ rmdir($fileInfo->getRealPath());
+ } else {
+ unlink($fileInfo->getRealPath());
+ }
+ }
+ if ($deleteSelf) {
+ rmdir($dir);
+ }
+ } elseif (file_exists($dir)) {
+ if ($deleteSelf) {
+ unlink($dir);
+ }
+ }
+ if (!$deleteSelf) {
+ return true;
+ }
+
+ return !file_exists($dir);
+ }
+
+ /**
+ * @deprecated 18.0.0
+ * @return \OC\Files\Type\TemplateManager
+ */
+ static public function getFileTemplateManager() {
+ if (!self::$templateManager) {
+ self::$templateManager = new \OC\Files\Type\TemplateManager();
+ }
+ return self::$templateManager;
+ }
+
+ /**
+ * detect if a given program is found in the search PATH
+ *
+ * @param string $name
+ * @param bool $path
+ * @internal param string $program name
+ * @internal 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");
+ }
+ // we look for an executable file of that name
+ $exts = [""];
+ $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 :
+ $obd = OC::$server->getIniWrapper()->getString('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;
+ }
+
+ /**
+ * copy the contents of one stream to another
+ *
+ * @param resource $source
+ * @param resource $target
+ * @return array the number of bytes copied and result
+ */
+ public static function streamCopy($source, $target) {
+ if (!$source or !$target) {
+ return [0, false];
+ }
+ $bufSize = 8192;
+ $result = true;
+ $count = 0;
+ while (!feof($source)) {
+ $buf = fread($source, $bufSize);
+ $bytesWritten = fwrite($target, $buf);
+ if ($bytesWritten !== false) {
+ $count += $bytesWritten;
+ }
+ // note: strlen is expensive so only use it when necessary,
+ // on the last block
+ if ($bytesWritten === false
+ || ($bytesWritten < $bufSize && $bytesWritten < strlen($buf))
+ ) {
+ // write error, could be disk full ?
+ $result = false;
+ break;
+ }
+ }
+ return [$count, $result];
+ }
+
+ /**
+ * Adds a suffix to the name in case the file exists
+ *
+ * @param string $path
+ * @param string $filename
+ * @return string
+ */
+ public static function buildNotExistingFileName($path, $filename) {
+ $view = \OC\Files\Filesystem::getView();
+ return self::buildNotExistingFileNameForView($path, $filename, $view);
+ }
+
+ /**
+ * Adds a suffix to the name in case the file exists
+ *
+ * @param string $path
+ * @param string $filename
+ * @return string
+ */
+ public static function buildNotExistingFileNameForView($path, $filename, \OC\Files\View $view) {
+ if ($path === '/') {
+ $path = '';
+ }
+ if ($pos = strrpos($filename, '.')) {
+ $name = substr($filename, 0, $pos);
+ $ext = substr($filename, $pos);
+ } else {
+ $name = $filename;
+ $ext = '';
+ }
+
+ $newpath = $path . '/' . $filename;
+ if ($view->file_exists($newpath)) {
+ if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
+ //Replace the last "(number)" with "(number+1)"
+ $last_match = count($matches[0]) - 1;
+ $counter = $matches[1][$last_match][0] + 1;
+ $offset = $matches[0][$last_match][1];
+ $match_length = strlen($matches[0][$last_match][0]);
+ } else {
+ $counter = 2;
+ $match_length = 0;
+ $offset = false;
+ }
+ do {
+ if ($offset) {
+ //Replace the last "(number)" with "(number+1)"
+ $newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length);
+ } else {
+ $newname = $name . ' (' . $counter . ')';
+ }
+ $newpath = $path . '/' . $newname . $ext;
+ $counter++;
+ } while ($view->file_exists($newpath));
+ }
+
+ return $newpath;
+ }
+
+ /**
+ * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
+ *
+ * @param array $input The array to work on
+ * @param int $case Either MB_CASE_UPPER or MB_CASE_LOWER (default)
+ * @param string $encoding The encoding parameter is the character encoding. Defaults to UTF-8
+ * @return array
+ *
+ * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
+ * based on http://www.php.net/manual/en/function.array-change-key-case.php#107715
+ *
+ */
+ public static function mb_array_change_key_case($input, $case = MB_CASE_LOWER, $encoding = 'UTF-8') {
+ $case = ($case != MB_CASE_UPPER) ? MB_CASE_LOWER : MB_CASE_UPPER;
+ $ret = [];
+ foreach ($input as $k => $v) {
+ $ret[mb_convert_case($k, $case, $encoding)] = $v;
+ }
+ return $ret;
+ }
+
+ /**
+ * performs a search in a nested array
+ * @param array $haystack the array to be searched
+ * @param string $needle the search string
+ * @param mixed $index optional, only search this key name
+ * @return mixed the key of the matching field, otherwise false
+ *
+ * performs a search in a nested array
+ *
+ * taken from http://www.php.net/manual/en/function.array-search.php#97645
+ */
+ public static function recursiveArraySearch($haystack, $needle, $index = null) {
+ $aIt = new RecursiveArrayIterator($haystack);
+ $it = new RecursiveIteratorIterator($aIt);
+
+ while ($it->valid()) {
+ if (((isset($index) AND ($it->key() == $index)) OR !isset($index)) AND ($it->current() == $needle)) {
+ return $aIt->key();
+ }
+
+ $it->next();
+ }
+
+ return false;
+ }
+
+ /**
+ * calculates the maximum upload size respecting system settings, free space and user quota
+ *
+ * @param string $dir the current folder where the user currently operates
+ * @param int $freeSpace the number of bytes free on the storage holding $dir, if not set this will be received from the storage directly
+ * @return int number of bytes representing
+ */
+ public static function maxUploadFilesize($dir, $freeSpace = null) {
+ if (is_null($freeSpace) || $freeSpace < 0){
+ $freeSpace = self::freeSpace($dir);
+ }
+ return min($freeSpace, self::uploadLimit());
+ }
+
+ /**
+ * Calculate free space left within user quota
+ *
+ * @param string $dir the current folder where the user currently operates
+ * @return int number of bytes representing
+ */
+ public static function freeSpace($dir) {
+ $freeSpace = \OC\Files\Filesystem::free_space($dir);
+ if ($freeSpace < \OCP\Files\FileInfo::SPACE_UNLIMITED) {
+ $freeSpace = max($freeSpace, 0);
+ return $freeSpace;
+ } else {
+ return (INF > 0)? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188
+ }
+ }
+
+ /**
+ * Calculate PHP upload limit
+ *
+ * @return int PHP upload file size limit
+ */
+ public static function uploadLimit() {
+ $ini = \OC::$server->getIniWrapper();
+ $upload_max_filesize = OCP\Util::computerFileSize($ini->get('upload_max_filesize'));
+ $post_max_size = OCP\Util::computerFileSize($ini->get('post_max_size'));
+ if ((int)$upload_max_filesize === 0 and (int)$post_max_size === 0) {
+ return INF;
+ } elseif ((int)$upload_max_filesize === 0 or (int)$post_max_size === 0) {
+ return max($upload_max_filesize, $post_max_size); //only the non 0 value counts
+ } else {
+ return min($upload_max_filesize, $post_max_size);
+ }
+ }
+
+ /**
+ * Checks if a function is available
+ *
+ * @param string $function_name
+ * @return bool
+ */
+ public static function is_function_enabled($function_name) {
+ if (!function_exists($function_name)) {
+ return false;
+ }
+ $ini = \OC::$server->getIniWrapper();
+ $disabled = explode(',', $ini->get('disable_functions') ?: '');
+ $disabled = array_map('trim', $disabled);
+ if (in_array($function_name, $disabled)) {
+ return false;
+ }
+ $disabled = explode(',', $ini->get('suhosin.executor.func.blacklist') ?: '');
+ $disabled = array_map('trim', $disabled);
+ if (in_array($function_name, $disabled)) {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Try to find a program
+ *
+ * @param string $program
+ * @return null|string
+ */
+ public static function findBinaryPath($program) {
+ $memcache = \OC::$server->getMemCacheFactory()->createDistributed('findBinaryPath');
+ if ($memcache->hasKey($program)) {
+ return $memcache->get($program);
+ }
+ $result = null;
+ if (self::is_function_enabled('exec')) {
+ $exeSniffer = new ExecutableFinder();
+ // Returns null if nothing is found
+ $result = $exeSniffer->find($program, null, ['/usr/local/sbin', '/usr/local/bin', '/usr/sbin', '/usr/bin', '/sbin', '/bin', '/opt/bin']);
+ }
+ // store the value for 5 minutes
+ $memcache->set($program, $result, 300);
+ return $result;
+ }
+
+ /**
+ * Calculate the disc space for the given path
+ *
+ * @param string $path
+ * @param \OCP\Files\FileInfo $rootInfo (optional)
+ * @return array
+ * @throws \OCP\Files\NotFoundException
+ */
+ public static function getStorageInfo($path, $rootInfo = null) {
+ // return storage info without adding mount points
+ $includeExtStorage = \OC::$server->getSystemConfig()->getValue('quota_include_external_storage', false);
+
+ if (!$rootInfo) {
+ $rootInfo = \OC\Files\Filesystem::getFileInfo($path, $includeExtStorage ? 'ext' : false);
+ }
+ if (!$rootInfo instanceof \OCP\Files\FileInfo) {
+ throw new \OCP\Files\NotFoundException();
+ }
+ $used = $rootInfo->getSize();
+ if ($used < 0) {
+ $used = 0;
+ }
+ $quota = \OCP\Files\FileInfo::SPACE_UNLIMITED;
+ $storage = $rootInfo->getStorage();
+ $sourceStorage = $storage;
+ if ($storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) {
+ $includeExtStorage = false;
+ $sourceStorage = $storage->getSourceStorage();
+ }
+ if ($includeExtStorage) {
+ if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
+ || $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
+ ) {
+ /** @var \OC\Files\Storage\Home $storage */
+ $user = $storage->getUser();
+ } else {
+ $user = \OC::$server->getUserSession()->getUser();
+ }
+ $quota = OC_Util::getUserQuota($user);
+ if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) {
+ // always get free space / total space from root + mount points
+ return self::getGlobalStorageInfo($quota);
+ }
+ }
+
+ // TODO: need a better way to get total space from storage
+ if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) {
+ /** @var \OC\Files\Storage\Wrapper\Quota $storage */
+ $quota = $sourceStorage->getQuota();
+ }
+ $free = $sourceStorage->free_space($rootInfo->getInternalPath());
+ if ($free >= 0) {
+ $total = $free + $used;
+ } else {
+ $total = $free; //either unknown or unlimited
+ }
+ if ($total > 0) {
+ if ($quota > 0 && $total > $quota) {
+ $total = $quota;
+ }
+ // prevent division by zero or error codes (negative values)
+ $relative = round(($used / $total) * 10000) / 100;
+ } else {
+ $relative = 0;
+ }
+
+ $ownerId = $storage->getOwner($path);
+ $ownerDisplayName = '';
+ $owner = \OC::$server->getUserManager()->get($ownerId);
+ if($owner) {
+ $ownerDisplayName = $owner->getDisplayName();
+ }
+
+ return [
+ 'free' => $free,
+ 'used' => $used,
+ 'quota' => $quota,
+ 'total' => $total,
+ 'relative' => $relative,
+ 'owner' => $ownerId,
+ 'ownerDisplayName' => $ownerDisplayName,
+ ];
+ }
+
+ /**
+ * Get storage info including all mount points and quota
+ *
+ * @param int $quota
+ * @return array
+ */
+ private static function getGlobalStorageInfo($quota) {
+ $rootInfo = \OC\Files\Filesystem::getFileInfo('', 'ext');
+ $used = $rootInfo['size'];
+ if ($used < 0) {
+ $used = 0;
+ }
+
+ $total = $quota;
+ $free = $quota - $used;
+
+ if ($total > 0) {
+ if ($quota > 0 && $total > $quota) {
+ $total = $quota;
+ }
+ // prevent division by zero or error codes (negative values)
+ $relative = round(($used / $total) * 10000) / 100;
+ } else {
+ $relative = 0;
+ }
+
+ return [
+ 'free' => $free,
+ 'used' => $used,
+ 'total' => $total,
+ 'relative' => $relative,
+ 'quota' => $quota
+ ];
+ }
+
+ /**
+ * Returns whether the config file is set manually to read-only
+ * @return bool
+ */
+ public static function isReadOnlyConfigEnabled() {
+ return \OC::$server->getConfig()->getSystemValue('config_is_read_only', false);
+ }
+}
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