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<?php
/**
* ownCloud - trash bin
*
* @author Bjoern Schiessle
* @copyright 2013 Bjoern Schiessle schiessle@owncloud.com
*
* 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/>.
*
*/
namespace OCA_Trash;
class Trashbin {
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)
/**
* move file to the trash bin
*
* @param $file_path path to the deleted file/directory relative to the files root directory
*/
public static function move2trash($file_path) {
$user = \OCP\User::getUser();
$view = new \OC_FilesystemView('/'. $user);
if (!$view->is_dir('files_trashbin')) {
$view->mkdir('files_trashbin');
$view->mkdir("versions_trashbin");
}
$path_parts = pathinfo($file_path);
$deleted = $path_parts['basename'];
$location = $path_parts['dirname'];
$timestamp = time();
$mime = $view->getMimeType('files'.$file_path);
if ( $view->is_dir('files'.$file_path) ) {
$type = 'dir';
} else {
$type = 'file';
}
self::copy_recursive($file_path, 'files_trashbin/'.$deleted.'.d'.$timestamp, $view);
if ( $view->file_exists('files_trashbin/'.$deleted.'.d'.$timestamp) ) {
$query = \OC_DB::prepare("INSERT INTO *PREFIX*files_trash (id,timestamp,location,type,mime,user) VALUES (?,?,?,?,?,?)");
$result = $query->execute(array($deleted, $timestamp, $location, $type, $mime, $user));
if ( !$result ) { // if file couldn't be added to the database than also don't store it in the trash bin.
$view->deleteAll('files_trashbin/'.$deleted.'.d'.$timestamp);
\OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated', \OC_log::ERROR);
return;
}
if ( \OCP\App::isEnabled('files_versions') ) {
if ( $view->is_dir('files_versions'.$file_path) ) {
$view->rename('files_versions'.$file_path, 'versions_trashbin/'. $deleted.'.d'.$timestamp);
} else if ( $versions = \OCA_Versions\Storage::getVersions($file_path) ) {
foreach ($versions as $v) {
$view->rename('files_versions'.$v['path'].'.v'.$v['version'], 'versions_trashbin/'. $deleted.'.v'.$v['version'].'.d'.$timestamp);
}
}
}
} else {
\OC_Log::write('files_trashbin', 'Couldn\'t move '.$file_path.' to the trash bin' , \OC_log::ERROR);
}
self::expire();
}
/**
* restore files from trash bin
* @param $file path to the deleted file
* @param $filename name of the file
* @param $timestamp time when the file was deleted
*/
public static function restore($file, $filename, $timestamp) {
$user = \OCP\User::getUser();
$view = new \OC_FilesystemView('/'.$user);
if ( $timestamp ) {
$query = \OC_DB::prepare('SELECT location,type FROM *PREFIX*files_trash WHERE user=? AND id=? AND timestamp=?');
$result = $query->execute(array($user,$filename,$timestamp))->fetchAll();
if ( count($result) != 1 ) {
\OC_Log::write('files_trashbin', 'trash bin database inconsistent!', \OC_Log::ERROR);
return false;
}
// if location no longer exists, restore file in the root directory
$location = $result[0]['location'];
if ( $result[0]['location'] != '/' &&
(!$view->is_dir('files'.$result[0]['location']) ||
!$view->isUpdatable('files'.$result[0]['location'])) ) {
$location = '';
}
} else {
$path_parts = pathinfo($filename);
$result[] = array(
'location' => $path_parts['dirname'],
'type' => $view->is_dir('/files_trashbin/'.$file) ? 'dir' : 'files',
);
$location = '';
}
$source = \OC_Filesystem::normalizePath('files_trashbin/'.$file);
$target = \OC_Filesystem::normalizePath('files/'.$location.'/'.$filename);
// we need a extension in case a file/dir with the same name already exists
$ext = self::getUniqueExtension($location, $filename, $view);
$mtime = $view->filemtime($source);
if( $view->rename($source, $target.$ext) ) {
$view->touch($target.$ext, $mtime);
// if versioning app is enabled, copy versions from the trash bin back to the original location
if ( \OCP\App::isEnabled('files_versions') ) {
if ( $result[0]['type'] == 'dir' ) {
$view->rename(\OC_Filesystem::normalizePath('versions_trashbin/'. $file), \OC_Filesystem::normalizePath('files_versions/'.$location.'/'.$filename.$ext));
} else if ( $versions = self::getVersionsFromTrash($file, $timestamp) ) {
foreach ($versions as $v) {
if ($timestamp ) {
$view->rename('versions_trashbin/'.$filename.'.v'.$v.'.d'.$timestamp, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
} else {
$view->rename('versions_trashbin/'.$file.'.v'.$v, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
}
}
}
}
if ( $timestamp ) {
$query = \OC_DB::prepare('DELETE FROM *PREFIX*files_trash WHERE user=? AND id=? AND timestamp=?');
$query->execute(array($user,$filename,$timestamp));
}
return true;
} else {
\OC_Log::write('files_trashbin', 'Couldn\'t restore file from trash bin, '.$filename , \OC_log::ERROR);
}
return false;
}
/**
* clean up the trash bin
*/
private static function expire() {
$view = new \OC_FilesystemView('/'.\OCP\User::getUser());
$user = \OCP\User::getUser();
$query = \OC_DB::prepare('SELECT location,type,id,timestamp FROM *PREFIX*files_trash WHERE user=?');
$result = $query->execute(array($user))->fetchAll();
$retention_obligation = \OC_Config::getValue('trashbin_retention_obligation', self::DEFAULT_RETENTION_OBLIGATION);
$limit = time() - ($retention_obligation * 86400);
foreach ( $result as $r ) {
$timestamp = $r['timestamp'];
$filename = $r['id'];
if ( $r['timestamp'] < $limit ) {
$view->unlink('files_trashbin/'.$filename.'.d'.$timestamp);
if ($r['type'] == 'dir') {
$view->unlink('versions_trashbin/'.$filename.'.d'.$timestamp);
} else if ( $versions = self::getVersionsFromTrash($filename, $timestamp) ) {
foreach ($versions as $v) {
$view->unlink('versions_trashbin/'.$filename.'.v'.$v.'.d'.$timestamp);
}
}
}
}
$query = \OC_DB::prepare('DELETE FROM *PREFIX*files_trash WHERE user=? AND timestamp<?');
$query->execute(array($user,$limit));
}
/**
* recursive copy to copy a whole directory
*
* @param $source source path, relative to the users files directory
* @param $destination destination path relative to the users root directoy
* @param $view file view for the users root directory
*/
private static function copy_recursive( $source, $destination, $view ) {
if ( $view->is_dir( 'files'.$source ) ) {
$view->mkdir( $destination );
$view->touch($destination, $view->filemtime('files'.$source));
foreach ( \OC_Files::getDirectoryContent($source) as $i ) {
$pathDir = $source.'/'.$i['name'];
if ( $view->is_dir('files'.$pathDir) ) {
self::copy_recursive($pathDir, $destination.'/'.$i['name'], $view);
} else {
$view->copy( 'files'.$pathDir, $destination . '/' . $i['name'] );
$view->touch($destination . '/' . $i['name'], $view->filemtime('files'.$pathDir));
}
}
} else {
$view->copy( 'files'.$source, $destination );
$view->touch($destination, $view->filemtime('files'.$source));
}
}
/**
* find all versions which belong to the file we want to restore
* @param $filename name of the file which should be restored
* @param $timestamp timestamp when the file was deleted
*/
private static function getVersionsFromTrash($filename, $timestamp) {
$view = new \OC_FilesystemView('/'.\OCP\User::getUser().'/versions_trashbin');
$versionsName = \OCP\Config::getSystemValue('datadirectory').$view->getAbsolutePath($filename);
$versions = array();
if ($timestamp ) {
// fetch for old versions
$matches = glob( $versionsName.'.v*.d'.$timestamp );
$offset = -strlen($timestamp)-2;
} else {
$matches = glob( $versionsName.'.v*' );
}
foreach( $matches as $ma ) {
if ( $timestamp ) {
$parts = explode( '.v', substr($ma, 0, $offset) );
$versions[] = ( end( $parts ) );
} else {
$parts = explode( '.v', $ma );
$versions[] = ( end( $parts ) );
}
}
return $versions;
}
/**
* find unique extension for restored file if a file with the same name already exists
* @param $location where the file should be restored
* @param $filename name of the file
* @param $view filesystem view relative to users root directory
* @return string with unique extension
*/
private static function getUniqueExtension($location, $filename, $view) {
$ext = '';
if ( $view->file_exists('files'.$location.'/'.$filename) ) {
$tmpext = '.restored';
$ext = $tmpext;
$i = 1;
while ( $view->file_exists('files'.$location.'/'.$filename.$ext) ) {
$ext = $tmpext.$i;
$i++;
}
}
return $ext;
}
}
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