411 lines
15 KiB
PHP
411 lines
15 KiB
PHP
<?php
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/**
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* ownCloud - trash bin
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*
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* @author Bjoern Schiessle
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* @copyright 2013 Bjoern Schiessle schiessle@owncloud.com
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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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namespace OCA\Files_Trashbin;
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class Trashbin {
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const DEFAULT_RETENTION_OBLIGATION=180; // how long do we keep files in the trash bin if no other value is defined in the config file (unit: days)
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const DEFAULTMAXSIZE=50; // unit: percentage; 50% of available disk space/quota
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/**
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* move file to the trash bin
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*
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* @param $file_path path to the deleted file/directory relative to the files root directory
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*/
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public static function move2trash($file_path) {
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$user = \OCP\User::getUser();
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$view = new \OC_FilesystemView('/'. $user);
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if (!$view->is_dir('files_trashbin')) {
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$view->mkdir('files_trashbin');
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$view->mkdir("versions_trashbin");
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}
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$path_parts = pathinfo($file_path);
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$deleted = $path_parts['basename'];
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$location = $path_parts['dirname'];
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$timestamp = time();
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$mime = $view->getMimeType('files'.$file_path);
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if ( $view->is_dir('files'.$file_path) ) {
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$type = 'dir';
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} else {
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$type = 'file';
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}
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if ( ($trashbinSize = \OCP\Config::getAppValue('files_trashbin', 'size')) === null ) {
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$trashbinSize = self::calculateSize(new \OC_FilesystemView('/'. $user.'/files_trashbin'));
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$trashbinSize += self::calculateSize(new \OC_FilesystemView('/'. $user.'/versions_trashbin'));
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}
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$trashbinSize += self::copy_recursive($file_path, 'files_trashbin/'.$deleted.'.d'.$timestamp, $view);
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if ( $view->file_exists('files_trashbin/'.$deleted.'.d'.$timestamp) ) {
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$query = \OC_DB::prepare("INSERT INTO *PREFIX*files_trash (id,timestamp,location,type,mime,user) VALUES (?,?,?,?,?,?)");
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$result = $query->execute(array($deleted, $timestamp, $location, $type, $mime, $user));
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if ( !$result ) { // if file couldn't be added to the database than also don't store it in the trash bin.
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$view->deleteAll('files_trashbin/'.$deleted.'.d'.$timestamp);
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\OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated', \OC_log::ERROR);
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return;
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}
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if ( \OCP\App::isEnabled('files_versions') ) {
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if ( $view->is_dir('files_versions'.$file_path) ) {
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$trashbinSize += self::calculateSize(new \OC_FilesystemView('/'. $user.'/files_versions/'.$file_path));
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$view->rename('files_versions'.$file_path, 'versions_trashbin/'. $deleted.'.d'.$timestamp);
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} else if ( $versions = \OCA\Files_Versions\Storage::getVersions($file_path) ) {
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foreach ($versions as $v) {
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$trashbinSize += $view->filesize('files_versions'.$v['path'].'.v'.$v['version']);
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$view->rename('files_versions'.$v['path'].'.v'.$v['version'], 'versions_trashbin/'. $deleted.'.v'.$v['version'].'.d'.$timestamp);
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}
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}
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}
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} else {
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\OC_Log::write('files_trashbin', 'Couldn\'t move '.$file_path.' to the trash bin' , \OC_log::ERROR);
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}
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// get available disk space for user
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$quota = \OCP\Util::computerFileSize(\OC_Preferences::getValue($user, 'files', 'quota'));
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if ( $quota == null ) {
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$quota = \OCP\Util::computerFileSize(\OC_Appconfig::getValue('files', 'default_quota'));
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}
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if ( $quota == null ) {
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$quota = \OC\Files\Filesystem::free_space('/');
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}
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// calculate available space for trash bin
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$rootInfo = $view->getFileInfo('/files');
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$free = $quota-$rootInfo['size']; // remaining free space for user
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if ( $free > 0 ) {
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$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $trashbinSize; // how much space can be used for versions
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} else {
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$availableSpace = $free-$trashbinSize;
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}
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$trashbinSize -= self::expire($availableSpace);
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\OCP\Config::setAppValue('files_trashbin', 'size', $trashbinSize);
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}
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/**
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* restore files from trash bin
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* @param $file path to the deleted file
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* @param $filename name of the file
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* @param $timestamp time when the file was deleted
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*/
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public static function restore($file, $filename, $timestamp) {
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$user = \OCP\User::getUser();
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$view = new \OC_FilesystemView('/'.$user);
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if ( ($trashbinSize = \OCP\Config::getAppValue('files_trashbin', 'size')) === null ) {
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$trashbinSize = self::calculateSize(new \OC_FilesystemView('/'. $user.'/files_trashbin'));
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$trashbinSize += self::calculateSize(new \OC_FilesystemView('/'. $user.'/versions_trashbin'));
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}
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if ( $timestamp ) {
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$query = \OC_DB::prepare('SELECT location,type FROM *PREFIX*files_trash WHERE user=? AND id=? AND timestamp=?');
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$result = $query->execute(array($user,$filename,$timestamp))->fetchAll();
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if ( count($result) != 1 ) {
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\OC_Log::write('files_trashbin', 'trash bin database inconsistent!', \OC_Log::ERROR);
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return false;
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}
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// if location no longer exists, restore file in the root directory
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$location = $result[0]['location'];
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if ( $result[0]['location'] != '/' &&
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(!$view->is_dir('files'.$result[0]['location']) ||
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!$view->isUpdatable('files'.$result[0]['location'])) ) {
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$location = '';
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}
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} else {
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$path_parts = pathinfo($filename);
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$result[] = array(
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'location' => $path_parts['dirname'],
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'type' => $view->is_dir('/files_trashbin/'.$file) ? 'dir' : 'files',
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);
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$location = '';
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}
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$source = \OC_Filesystem::normalizePath('files_trashbin/'.$file);
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$target = \OC_Filesystem::normalizePath('files/'.$location.'/'.$filename);
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// we need a extension in case a file/dir with the same name already exists
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$ext = self::getUniqueExtension($location, $filename, $view);
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$mtime = $view->filemtime($source);
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if( $view->rename($source, $target.$ext) ) {
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$view->touch($target.$ext, $mtime);
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if ($view->is_dir($target.$ext)) {
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$trashbinSize -= self::calculateSize(new \OC_FilesystemView('/'.$user.'/'.$target.$ext));
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} else {
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$trashbinSize -= $view->filesize($target.$ext);
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}
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// if versioning app is enabled, copy versions from the trash bin back to the original location
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if ( \OCP\App::isEnabled('files_versions') ) {
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if ($timestamp ) {
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$versionedFile = $filename;
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} else {
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$versionedFile = $file;
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}
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if ( $result[0]['type'] == 'dir' ) {
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$trashbinSize -= self::calculateSize(new \OC_FilesystemView('/'.$user.'/'.'versions_trashbin/'. $file));
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$view->rename(\OC_Filesystem::normalizePath('versions_trashbin/'. $file), \OC_Filesystem::normalizePath('files_versions/'.$location.'/'.$filename.$ext));
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} else if ( $versions = self::getVersionsFromTrash($versionedFile, $timestamp) ) {
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foreach ($versions as $v) {
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if ($timestamp ) {
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$trashbinSize -= $view->filesize('versions_trashbin/'.$versionedFile.'.v'.$v.'.d'.$timestamp);
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$view->rename('versions_trashbin/'.$versionedFile.'.v'.$v.'.d'.$timestamp, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
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} else {
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$trashbinSize -= $view->filesize('versions_trashbin/'.$versionedFile.'.v'.$v);
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$view->rename('versions_trashbin/'.$versionedFile.'.v'.$v, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
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}
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}
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}
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}
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if ( $timestamp ) {
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$query = \OC_DB::prepare('DELETE FROM *PREFIX*files_trash WHERE user=? AND id=? AND timestamp=?');
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$query->execute(array($user,$filename,$timestamp));
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}
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\OCP\Config::setAppValue('files_trashbin', 'size', $trashbinSize);
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return true;
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} else {
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\OC_Log::write('files_trashbin', 'Couldn\'t restore file from trash bin, '.$filename , \OC_log::ERROR);
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}
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return false;
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}
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/**
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* delete file from trash bin permanently
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* @param $filename path to the file
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* @param $timestamp of deletion time
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* @return size of deleted files
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*/
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public static function delete($filename, $timestamp=null) {
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$user = \OCP\User::getUser();
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$view = new \OC_FilesystemView('/'.$user);
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$size = 0;
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if ( ($trashbinSize = \OCP\Config::getAppValue('files_trashbin', 'size')) === null ) {
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$trashbinSize = self::calculateSize(new \OC_FilesystemView('/'. $user.'/files_trashbin'));
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$trashbinSize += self::calculateSize(new \OC_FilesystemView('/'. $user.'/versions_trashbin'));
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}
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if ( $timestamp ) {
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$query = \OC_DB::prepare('DELETE FROM *PREFIX*files_trash WHERE user=? AND id=? AND timestamp=?');
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$query->execute(array($user,$filename,$timestamp));
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$file = $filename.'.d'.$timestamp;
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} else {
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$file = $filename;
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}
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if ( \OCP\App::isEnabled('files_versions') ) {
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if ($view->is_dir('versions_trashbin/'.$file)) {
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$size += self::calculateSize(new \OC_Filesystemview('/'.$user.'/versions_trashbin/'.$file));
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$view->unlink('versions_trashbin/'.$file);
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} else if ( $versions = self::getVersionsFromTrash($filename, $timestamp) ) {
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foreach ($versions as $v) {
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if ($timestamp ) {
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$size += $view->filesize('/versions_trashbin/'.$filename.'.v'.$v.'.d'.$timestamp);
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$view->unlink('/versions_trashbin/'.$filename.'.v'.$v.'.d'.$timestamp);
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} else {
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$size += $view->filesize('/versions_trashbin/'.$filename.'.v'.$v);
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$view->unlink('/versions_trashbin/'.$filename.'.v'.$v);
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}
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}
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}
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}
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if ($view->is_dir('/files_trashbin/'.$file)) {
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$size += self::calculateSize(new \OC_Filesystemview('/'.$user.'/files_trashbin/'.$file));
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} else {
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$size += $view->filesize('/files_trashbin/'.$file);
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}
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$view->unlink('/files_trashbin/'.$file);
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$trashbinSize -= $size;
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\OCP\Config::setAppValue('files_trashbin', 'size', $trashbinSize);
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return $size;
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}
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/**
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* clean up the trash bin
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* @param max. available disk space for trashbin
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*/
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private static function expire($availableSpace) {
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$user = \OCP\User::getUser();
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$view = new \OC_FilesystemView('/'.$user);
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$size = 0;
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$query = \OC_DB::prepare('SELECT location,type,id,timestamp FROM *PREFIX*files_trash WHERE user=?');
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$result = $query->execute(array($user))->fetchAll();
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$retention_obligation = \OC_Config::getValue('trashbin_retention_obligation', self::DEFAULT_RETENTION_OBLIGATION);
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$limit = time() - ($retention_obligation * 86400);
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foreach ( $result as $r ) {
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$timestamp = $r['timestamp'];
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$filename = $r['id'];
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if ( $r['timestamp'] < $limit ) {
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if ($view->is_dir('files_trashbin/'.$filename.'.d'.$timestamp)) {
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$size += self::calculateSize(new \OC_FilesystemView('/'.$user.'/files_trashbin/'.$filename.'.d'.$timestamp));
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} else {
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$size += $view->filesize('files_trashbin/'.$filename.'.d'.$timestamp);
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}
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$view->unlink('files_trashbin/'.$filename.'.d'.$timestamp);
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if ($r['type'] == 'dir') {
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$size += self::calculateSize(new \OC_FilesystemView('/'.$user.'/versions_trashbin/'.$filename.'.d'.$timestamp));
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$view->unlink('versions_trashbin/'.$filename.'.d'.$timestamp);
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} else if ( $versions = self::getVersionsFromTrash($filename, $timestamp) ) {
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foreach ($versions as $v) {
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$size += $view->filesize('versions_trashbin/'.$filename.'.v'.$v.'.d'.$timestamp);
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$view->unlink('versions_trashbin/'.$filename.'.v'.$v.'.d'.$timestamp);
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}
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}
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}
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}
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$query = \OC_DB::prepare('DELETE FROM *PREFIX*files_trash WHERE user=? AND timestamp<?');
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$query->execute(array($user,$limit));
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$availableSpace = $availableSpace + $size;
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// if size limit for trash bin reached, delete oldest files in trash bin
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if ($availableSpace < 0) {
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$query = \OC_DB::prepare('SELECT location,type,id,timestamp FROM *PREFIX*files_trash WHERE user=? ORDER BY timestamp ASC');
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$result = $query->execute(array($user))->fetchAll();
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$length = count($result);
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$i = 0;
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while ( $i < $length && $availableSpace < 0 ) {
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$tmp = self::delete($result[$i]['id'], $result[$i]['timestamp']);
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$availableSpace += $tmp;
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$size += $tmp;
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$i++;
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}
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}
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return $size;
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}
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/**
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* recursive copy to copy a whole directory
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*
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* @param $source source path, relative to the users files directory
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* @param $destination destination path relative to the users root directoy
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* @param $view file view for the users root directory
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*/
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private static function copy_recursive( $source, $destination, $view ) {
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$size = 0;
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if ( $view->is_dir( 'files'.$source ) ) {
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$view->mkdir( $destination );
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$view->touch($destination, $view->filemtime('files'.$source));
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foreach ( \OC_Files::getDirectoryContent($source) as $i ) {
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$pathDir = $source.'/'.$i['name'];
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if ( $view->is_dir('files'.$pathDir) ) {
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$size += self::copy_recursive($pathDir, $destination.'/'.$i['name'], $view);
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} else {
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$size += $view->filesize('files'.$pathDir);
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$view->copy( 'files'.$pathDir, $destination . '/' . $i['name'] );
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$view->touch($destination . '/' . $i['name'], $view->filemtime('files'.$pathDir));
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}
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}
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} else {
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$size += $view->filesize('files'.$source);
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$view->copy( 'files'.$source, $destination );
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$view->touch($destination, $view->filemtime('files'.$source));
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}
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return $size;
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}
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/**
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* find all versions which belong to the file we want to restore
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* @param $filename name of the file which should be restored
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* @param $timestamp timestamp when the file was deleted
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*/
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private static function getVersionsFromTrash($filename, $timestamp) {
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$view = new \OC_FilesystemView('/'.\OCP\User::getUser().'/versions_trashbin');
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$versionsName = \OCP\Config::getSystemValue('datadirectory').$view->getAbsolutePath($filename);
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$versions = array();
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if ($timestamp ) {
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// fetch for old versions
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$matches = glob( $versionsName.'.v*.d'.$timestamp );
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$offset = -strlen($timestamp)-2;
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} else {
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$matches = glob( $versionsName.'.v*' );
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}
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foreach( $matches as $ma ) {
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if ( $timestamp ) {
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$parts = explode( '.v', substr($ma, 0, $offset) );
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$versions[] = ( end( $parts ) );
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} else {
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$parts = explode( '.v', $ma );
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$versions[] = ( end( $parts ) );
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}
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}
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return $versions;
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}
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/**
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* find unique extension for restored file if a file with the same name already exists
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* @param $location where the file should be restored
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* @param $filename name of the file
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* @param $view filesystem view relative to users root directory
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* @return string with unique extension
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*/
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private static function getUniqueExtension($location, $filename, $view) {
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$ext = '';
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if ( $view->file_exists('files'.$location.'/'.$filename) ) {
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$tmpext = '.restored';
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$ext = $tmpext;
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$i = 1;
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while ( $view->file_exists('files'.$location.'/'.$filename.$ext) ) {
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$ext = $tmpext.$i;
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$i++;
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}
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}
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return $ext;
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}
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/**
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* @brief get the size from a given root folder
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* @param $view file view on the root folder
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* @return size of the folder
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*/
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private static function calculateSize($view) {
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$root = \OCP\Config::getSystemValue('datadirectory').$view->getAbsolutePath('');
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$iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($root), \RecursiveIteratorIterator::CHILD_FIRST);
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$size = 0;
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foreach ($iterator as $path) {
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$relpath = substr($path, strlen($root)-1);
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if ( !$view->is_dir($relpath) ) {
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$size += $view->filesize($relpath);
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}
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}
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return $size;
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}
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}
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