518 lines
19 KiB
PHP
518 lines
19 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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// 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 DEFAULT_RETENTION_OBLIGATION=180;
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// unit: percentage; 50% of available disk space/quota
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const DEFAULTMAXSIZE=50;
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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\Files\View('/'. $user);
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if (!$view->is_dir('files_trashbin')) {
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$view->mkdir('files_trashbin');
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$view->mkdir("files_trashbin/files");
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$view->mkdir("files_trashbin/versions");
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$view->mkdir("files_trashbin/keyfiles");
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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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$trashbinSize = self::getTrashbinSize($user);
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if ( $trashbinSize === false || $trashbinSize < 0 ) {
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$trashbinSize = self::calculateSize(new \OC\Files\View('/'. $user.'/files_trashbin'));
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}
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$trashbinSize += self::copy_recursive($file_path, 'files_trashbin/files/'.$deleted.'.d'.$timestamp, $view);
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if ( $view->file_exists('files_trashbin/files/'.$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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$view->deleteAll('files_trashbin/files/'.$deleted.'.d'.$timestamp);
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\OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated', \OC_log::ERROR);
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return;
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}
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\OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_moveToTrash',
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array('filePath' => \OC\Files\Filesystem::normalizePath($file_path),
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'trashPath' => \OC\Files\Filesystem::normalizePath($deleted.'.d'.$timestamp)));
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// Take care of file versions
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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\Files\View('/'. $user.'/files_versions/'.$file_path));
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$view->rename('files_versions/'.$file_path, 'files_trashbin/versions'. $deleted.'.d'.$timestamp);
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} else if ( $versions = \OCA\Files_Versions\Storage::getVersions($user, $file_path) ) {
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foreach ($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'], 'files_trashbin/versions/'. $deleted.'.v'.$v['version'].'.d'.$timestamp);
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}
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}
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}
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// Take care of encryption keys
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$keyfile = \OC\Files\Filesystem::normalizePath('files_encryption/keyfiles/'.$file_path);
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if ( \OCP\App::isEnabled('files_encryption') && $view->file_exists($keyfile.'.key') ) {
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if ( $view->is_dir('files'.$file_path) ) {
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$trashbinSize += self::calculateSize(new \OC\Files\View('/'.$user.'/'.$keyfile));
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$view->rename($keyfile, 'files_trashbin/keyfiles/'. $deleted.'.d'.$timestamp);
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} else {
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$trashbinSize += $view->filesize($keyfile.'.key');
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$view->rename($keyfile.'.key', 'files_trashbin/keyfiles/'. $deleted.'.key.d'.$timestamp);
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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 = \OC_Preferences::getValue($user, 'files', 'quota');
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if ( $quota === null || $quota === 'default') {
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$quota = \OC_Appconfig::getValue('files', 'default_quota');
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}
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if ( $quota === null || $quota === 'none' ) {
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$quota = \OC\Files\Filesystem::free_space('/') / count(\OCP\User::getUsers());
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} else {
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$quota = \OCP\Util::computerFileSize($quota);
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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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self::setTrashbinSize($user, $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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$view = new \OC\Files\View('/'.$user);
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$trashbinSize = self::getTrashbinSize($user);
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if ( $trashbinSize === false || $trashbinSize < 0 ) {
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$trashbinSize = self::calculateSize(new \OC\Files\View('/'. $user.'/files_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`'
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.' 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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$path_parts = pathinfo($file);
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$result[] = array(
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'location' => $path_parts['dirname'],
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'type' => $view->is_dir('/files_trashbin/files/'.$file) ? 'dir' : 'files',
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);
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$location = '';
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}
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$source = \OC\Files\Filesystem::normalizePath('files_trashbin/files/'.$file);
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$target = \OC\Files\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, $mtime);
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\OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_restore',
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array('filePath' => \OC\Files\Filesystem::normalizePath('/'.$location.'/'.$filename.$ext),
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'trashPath' => \OC\Files\Filesystem::normalizePath($file)));
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if ($view->is_dir($target.$ext)) {
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$trashbinSize -= self::calculateSize(new \OC\Files\View('/'.$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\Files\View('/'.$user.'/'.'files_trashbin/versions/'. $file));
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$view->rename(\OC\Files\Filesystem::normalizePath('files_trashbin/versions/'. $file), \OC\Files\Filesystem::normalizePath('files_versions/'.$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 -= $view->filesize('files_trashbin/versions/'.$versionedFile.'.v'.$v.'.d'.$timestamp);
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$view->rename('files_trashbin/versions/'.$versionedFile.'.v'.$v.'.d'.$timestamp, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
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} else {
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$trashbinSize -= $view->filesize('files_trashbin/versions/'.$versionedFile.'.v'.$v);
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$view->rename('files_trashbin/versions/'.$versionedFile.'.v'.$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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// Take care of encryption keys TODO! Get '.key' in file between file name and delete date (also for permanent delete!)
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$parts = pathinfo($file);
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if ( $result[0]['type'] === 'dir' ) {
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$keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$parts['dirname'].'/'.$filename);
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} else {
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$keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$parts['dirname'].'/'.$filename.'.key');
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}
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if ($timestamp) {
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$keyfile .= '.d'.$timestamp;
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}
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if ( \OCP\App::isEnabled('files_encryption') && $view->file_exists($keyfile) ) {
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if ( $result[0]['type'] === 'dir' ) {
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$trashbinSize -= self::calculateSize(new \OC\Files\View('/'.$user.'/'.$keyfile));
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$view->rename($keyfile, 'files_encryption/keyfiles/'. $location.'/'.$filename);
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} else {
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$trashbinSize -= $view->filesize($keyfile);
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$view->rename($keyfile, 'files_encryption/keyfiles/'. $location.'/'.$filename.'.key');
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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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self::setTrashbinSize($user, $trashbinSize);
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return true;
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} else {
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\OC_Log::write('files_trashbin', 'Couldn\'t restore file from trash bin, '.$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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$view = new \OC\Files\View('/'.$user);
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$size = 0;
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$trashbinSize = self::getTrashbinSize($user);
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if ( $trashbinSize === false || $trashbinSize < 0 ) {
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$trashbinSize = self::calculateSize(new \OC\Files\View('/'. $user.'/files_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('files_trashbin/versions/'.$file)) {
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$size += self::calculateSize(new \OC\Files\view('/'.$user.'/files_trashbin/versions/'.$file));
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$view->unlink('files_trashbin/versions/'.$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 += $view->filesize('/files_trashbin/versions/'.$filename.'.v'.$v.'.d'.$timestamp);
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$view->unlink('/files_trashbin/versions/'.$filename.'.v'.$v.'.d'.$timestamp);
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} else {
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$size += $view->filesize('/files_trashbin/versions/'.$filename.'.v'.$v);
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$view->unlink('/files_trashbin/versions/'.$filename.'.v'.$v);
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}
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}
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}
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}
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// Take care of encryption keys
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$parts = pathinfo($file);
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if ( $view->is_dir('/files_trashbin/files/'.$file) ) {
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$keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$filename);
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} else {
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$keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$filename.'.key');
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}
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if ($timestamp) {
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$keyfile .= '.d'.$timestamp;
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}
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if ( \OCP\App::isEnabled('files_encryption') && $view->file_exists($keyfile) ) {
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if ( $view->is_dir($keyfile) ) {
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$size += self::calculateSize(new \OC\Files\View('/'.$user.'/'.$keyfile));
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} else {
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$size += $view->filesize($keyfile);
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}
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$view->unlink($keyfile);
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}
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if ($view->is_dir('/files_trashbin/files/'.$file)) {
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$size += self::calculateSize(new \OC\Files\View('/'.$user.'/files_trashbin/files/'.$file));
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} else {
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$size += $view->filesize('/files_trashbin/files/'.$file);
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}
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$view->unlink('/files_trashbin/files/'.$file);
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$trashbinSize -= $size;
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self::setTrashbinSize($user, $trashbinSize);
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return $size;
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}
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/**
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* check to see whether a file exists in trashbin
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* @param $filename path to the file
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* @param $timestamp of deletion time
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* @return true if file exists, otherwise false
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*/
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public static function file_exists($filename, $timestamp=null) {
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$user = \OCP\User::getUser();
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$view = new \OC\Files\View('/'.$user);
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if ($timestamp) {
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$filename = $filename.'.d'.$timestamp;
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} else {
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$filename = $filename;
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}
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$target = \OC\Files\Filesystem::normalizePath('files_trashbin/files/'.$filename);
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return $view->file_exists($target);
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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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$view = new \OC\Files\View('/'.$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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$retention_obligation = \OC_Config::getValue('trashbin_retention_obligation',
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self::DEFAULT_RETENTION_OBLIGATION);
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$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'] < $limit ) {
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$size += self::delete($filename, $timestamp);
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}
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}
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$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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$query = \OC_DB::prepare('SELECT `location`,`type`,`id`,`timestamp` FROM `*PREFIX*files_trash`'
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.' WHERE `user`=? ORDER BY `timestamp` ASC');
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$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\Files\View('/'.\OCP\User::getUser().'/files_trashbin/versions');
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$versionsName = $view->getLocalFile($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 );
|
|
$offset = -strlen($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;
|
|
}
|
|
|
|
/**
|
|
* @brief get the size from a given root folder
|
|
* @param $view file view on the root folder
|
|
* @return size of the folder
|
|
*/
|
|
private static function calculateSize($view) {
|
|
$root = \OCP\Config::getSystemValue('datadirectory').$view->getAbsolutePath('');
|
|
if (!file_exists($root)) {
|
|
return 0;
|
|
}
|
|
$iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($root),
|
|
\RecursiveIteratorIterator::CHILD_FIRST);
|
|
$size = 0;
|
|
|
|
foreach ($iterator as $path) {
|
|
$relpath = substr($path, strlen($root)-1);
|
|
if ( !$view->is_dir($relpath) ) {
|
|
$size += $view->filesize($relpath);
|
|
}
|
|
}
|
|
return $size;
|
|
}
|
|
|
|
/**
|
|
* get current size of trash bin from a given user
|
|
*
|
|
* @param $user user who owns the trash bin
|
|
* @return mixed trash bin size or false if no trash bin size is stored
|
|
*/
|
|
private static function getTrashbinSize($user) {
|
|
$query = \OC_DB::prepare('SELECT `size` FROM `*PREFIX*files_trashsize` WHERE `user`=?');
|
|
$result = $query->execute(array($user))->fetchAll();
|
|
|
|
if ($result) {
|
|
return $result[0]['size'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* write to the database how much space is in use for the trash bin
|
|
*
|
|
* @param $user owner of the trash bin
|
|
* @param $size size of the trash bin
|
|
*/
|
|
private static function setTrashbinSize($user, $size) {
|
|
if ( self::getTrashbinSize($user) === false) {
|
|
$query = \OC_DB::prepare('INSERT INTO `*PREFIX*files_trashsize` (`size`, `user`) VALUES (?, ?)');
|
|
}else {
|
|
$query = \OC_DB::prepare('UPDATE `*PREFIX*files_trashsize` SET `size`=? WHERE `user`=?');
|
|
}
|
|
$query->execute(array($size, $user));
|
|
}
|
|
|
|
}
|