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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\Files_Trashbin;
+
+class Trashbin {
+ // how long do we keep files in the trash bin if no other value is defined in the config file (unit: days)
+
+ const DEFAULT_RETENTION_OBLIGATION = 30;
+
+ // unit: percentage; 50% of available disk space/quota
+ const DEFAULTMAXSIZE = 50;
+
+ public static function getUidAndFilename($filename) {
+ $uid = \OC\Files\Filesystem::getOwner($filename);
+ \OC\Files\Filesystem::initMountPoints($uid);
+ if ($uid != \OCP\User::getUser()) {
+ $info = \OC\Files\Filesystem::getFileInfo($filename);
+ $ownerView = new \OC\Files\View('/' . $uid . '/files');
+ $filename = $ownerView->getPath($info['fileid']);
+ }
+ return array($uid, $filename);
+ }
+
+ /**
+ * 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\Files\View('/' . $user);
+ if (!$view->is_dir('files_trashbin')) {
+ $view->mkdir('files_trashbin');
+ }
+ if (!$view->is_dir('files_trashbin/files')) {
+ $view->mkdir('files_trashbin/files');
+ }
+ if (!$view->is_dir('files_trashbin/versions')) {
+ $view->mkdir('files_trashbin/versions');
+ }
+ if (!$view->is_dir('files_trashbin/keyfiles')) {
+ $view->mkdir('files_trashbin/keyfiles');
+ }
+ if (!$view->is_dir('files_trashbin/share-keys')) {
+ $view->mkdir('files_trashbin/share-keys');
+ }
+ $path_parts = pathinfo($file_path);
+
+ $filename = $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';
+ }
+
+ $trashbinSize = self::getTrashbinSize($user);
+ if ($trashbinSize === false || $trashbinSize < 0) {
+ $trashbinSize = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
+ }
+
+ // disable proxy to prevent recursive calls
+ $proxyStatus = \OC_FileProxy::$enabled;
+ \OC_FileProxy::$enabled = false;
+ $sizeOfAddedFiles = self::copy_recursive($file_path, 'files_trashbin/files/' . $filename . '.d' . $timestamp, $view);
+ \OC_FileProxy::$enabled = $proxyStatus;
+
+ if ($view->file_exists('files_trashbin/files/' . $filename . '.d' . $timestamp)) {
+ $trashbinSize += $sizeOfAddedFiles;
+ $query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`type`,`mime`,`user`) VALUES (?,?,?,?,?,?)");
+ $result = $query->execute(array($filename, $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/files/' . $filename . '.d' . $timestamp);
+ \OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated', \OC_log::ERROR);
+ return;
+ }
+ \OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_moveToTrash', array('filePath' => \OC\Files\Filesystem::normalizePath($file_path),
+ 'trashPath' => \OC\Files\Filesystem::normalizePath($filename . '.d' . $timestamp)));
+
+ $trashbinSize += self::retainVersions($file_path, $filename, $timestamp);
+ $trashbinSize += self::retainEncryptionKeys($file_path, $filename, $timestamp);
+ } else {
+ \OC_Log::write('files_trashbin', 'Couldn\'t move ' . $file_path . ' to the trash bin', \OC_log::ERROR);
+ }
+
+ $trashbinSize -= self::expire($trashbinSize);
+
+ self::setTrashbinSize($user, $trashbinSize);
+ }
+
+ /**
+ * Move file versions to trash so that they can be restored later
+ *
+ * @param $file_path path to original file
+ * @param $filename of deleted file
+ * @param $timestamp when the file was deleted
+ *
+ * @return size of stored versions
+ */
+ private static function retainVersions($file_path, $filename, $timestamp) {
+ $size = 0;
+ if (\OCP\App::isEnabled('files_versions')) {
+
+ // disable proxy to prevent recursive calls
+ $proxyStatus = \OC_FileProxy::$enabled;
+ \OC_FileProxy::$enabled = false;
+
+ $user = \OCP\User::getUser();
+ $rootView = new \OC\Files\View('/');
+
+ list($owner, $ownerPath) = self::getUidAndFilename($file_path);
+
+ if ($rootView->is_dir($owner . '/files_versions/' . $ownerPath)) {
+ $size += self::calculateSize(new \OC\Files\View('/' . $owner . '/files_versions/' . $ownerPath));
+ $rootView->rename($owner . '/files_versions/' . $ownerPath, $user . '/files_trashbin/versions/' . $filename . '.d' . $timestamp);
+ } else if ($versions = \OCA\Files_Versions\Storage::getVersions($owner, $ownerPath)) {
+ foreach ($versions as $v) {
+ $size += $rootView->filesize($owner . '/files_versions' . $v['path'] . '.v' . $v['version']);
+ $rootView->rename($owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $user . '/files_trashbin/versions/' . $filename . '.v' . $v['version'] . '.d' . $timestamp);
+ }
+ }
+
+ // enable proxy
+ \OC_FileProxy::$enabled = $proxyStatus;
+ }
+
+ return $size;
+ }
+
+ /**
+ * Move encryption keys to trash so that they can be restored later
+ *
+ * @param $file_path path to original file
+ * @param $filename of deleted file
+ * @param $timestamp when the file was deleted
+ *
+ * @return size of encryption keys
+ */
+ private static function retainEncryptionKeys($file_path, $filename, $timestamp) {
+ $size = 0;
+
+ if (\OCP\App::isEnabled('files_encryption')) {
+
+ $user = \OCP\User::getUser();
+ $rootView = new \OC\Files\View('/');
+
+ list($owner, $ownerPath) = self::getUidAndFilename($file_path);
+
+ $util = new \OCA\Encryption\Util(new \OC_FilesystemView('/'), $user);
+
+ // disable proxy to prevent recursive calls
+ $proxyStatus = \OC_FileProxy::$enabled;
+ \OC_FileProxy::$enabled = false;
+
+ if ($util->isSystemWideMountPoint($ownerPath)) {
+ $baseDir = '/files_encryption/';
+ } else {
+ $baseDir = $owner . '/files_encryption/';
+ }
+
+ $keyfile = \OC\Files\Filesystem::normalizePath($baseDir . '/keyfiles/' . $ownerPath);
+
+ if ($rootView->is_dir($keyfile) || $rootView->file_exists($keyfile . '.key')) {
+ // move keyfiles
+ if ($rootView->is_dir($keyfile)) {
+ $size += self::calculateSize(new \OC\Files\View($keyfile));
+ $rootView->rename($keyfile, $user . '/files_trashbin/keyfiles/' . $filename . '.d' . $timestamp);
+ } else {
+ $size += $rootView->filesize($keyfile . '.key');
+ $rootView->rename($keyfile . '.key', $user . '/files_trashbin/keyfiles/' . $filename . '.key.d' . $timestamp);
+ }
+ }
+
+ // retain share keys
+ $sharekeys = \OC\Files\Filesystem::normalizePath($baseDir . '/share-keys/' . $ownerPath);
+
+ if ($rootView->is_dir($sharekeys)) {
+ $size += self::calculateSize(new \OC\Files\View($sharekeys));
+ $rootView->rename($sharekeys, $user . '/files_trashbin/share-keys/' . $filename . '.d' . $timestamp);
+ } else {
+ // get local path to share-keys
+ $localShareKeysPath = $rootView->getLocalFile($sharekeys);
+ $escapedLocalShareKeysPath = preg_replace('/(\*|\?|\[)/', '[$1]', $localShareKeysPath);
+
+ // handle share-keys
+ $matches = glob($escapedLocalShareKeysPath . '*.shareKey');
+ foreach ($matches as $src) {
+ // get source file parts
+ $pathinfo = pathinfo($src);
+
+ // we only want to keep the owners key so we can access the private key
+ $ownerShareKey = $filename . '.' . $user . '.shareKey';
+
+ // if we found the share-key for the owner, we need to move it to files_trashbin
+ if ($pathinfo['basename'] == $ownerShareKey) {
+
+ // calculate size
+ $size += $rootView->filesize($sharekeys . '.' . $user . '.shareKey');
+
+ // move file
+ $rootView->rename($sharekeys . '.' . $user . '.shareKey', $user . '/files_trashbin/share-keys/' . $ownerShareKey . '.d' . $timestamp);
+ } else {
+
+ // calculate size
+ $size += filesize($src);
+
+ // don't keep other share-keys
+ unlink($src);
+ }
+ }
+ }
+
+ // enable proxy
+ \OC_FileProxy::$enabled = $proxyStatus;
+ }
+ return $size;
+ }
+
+ /**
+ * restore files from trash bin
+ * @param $file path to the deleted file
+ * @param $filename name of the file
+ * @param $timestamp time when the file was deleted
+ *
+ * @return bool
+ */
+ public static function restore($file, $filename, $timestamp) {
+
+ $user = \OCP\User::getUser();
+ $view = new \OC\Files\View('/' . $user);
+
+ $trashbinSize = self::getTrashbinSize($user);
+ if ($trashbinSize === false || $trashbinSize < 0) {
+ $trashbinSize = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
+ }
+ if ($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 {
+ $path_parts = pathinfo($file);
+ $result[] = array(
+ 'location' => $path_parts['dirname'],
+ 'type' => $view->is_dir('/files_trashbin/files/' . $file) ? 'dir' : 'files',
+ );
+ $location = '';
+ }
+
+ // we need a extension in case a file/dir with the same name already exists
+ $uniqueFilename = self::getUniqueFilename($location, $filename, $view);
+
+ $source = \OC\Files\Filesystem::normalizePath('files_trashbin/files/' . $file);
+ $target = \OC\Files\Filesystem::normalizePath('files/' . $location . '/' . $uniqueFilename);
+ $mtime = $view->filemtime($source);
+
+ // disable proxy to prevent recursive calls
+ $proxyStatus = \OC_FileProxy::$enabled;
+ \OC_FileProxy::$enabled = false;
+
+ // restore file
+ $restoreResult = $view->rename($source, $target);
+
+ // handle the restore result
+ if ($restoreResult) {
+ $fakeRoot = $view->getRoot();
+ $view->chroot('/' . $user . '/files');
+ $view->touch('/' . $location . '/' . $uniqueFilename, $mtime);
+ $view->chroot($fakeRoot);
+ \OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_restore', array('filePath' => \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $uniqueFilename),
+ 'trashPath' => \OC\Files\Filesystem::normalizePath($file)));
+ if ($view->is_dir($target)) {
+ $trashbinSize -= self::calculateSize(new \OC\Files\View('/' . $user . '/' . $target));
+ } else {
+ $trashbinSize -= $view->filesize($target);
+ }
+
+ $trashbinSize -= self::restoreVersions($view, $file, $filename, $uniqueFilename, $location, $timestamp);
+ $trashbinSize -= self::restoreEncryptionKeys($view, $file, $filename, $uniqueFilename, $location, $timestamp);
+
+ if ($timestamp) {
+ $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=? AND `id`=? AND `timestamp`=?');
+ $query->execute(array($user, $filename, $timestamp));
+ }
+
+ self::setTrashbinSize($user, $trashbinSize);
+
+ // enable proxy
+ \OC_FileProxy::$enabled = $proxyStatus;
+
+ return true;
+ }
+
+ // enable proxy
+ \OC_FileProxy::$enabled = $proxyStatus;
+
+ return false;
+ }
+
+ /**
+ * @brief restore versions from trash bin
+ *
+ * @param \OC\Files\View $view file view
+ * @param $file complete path to file
+ * @param $filename name of file once it was deleted
+ * @param $uniqueFilename new file name to restore the file without overwriting existing files
+ * @param $location location if file
+ * @param $timestamp deleteion time
+ *
+ * @return size of restored versions
+ */
+ private static function restoreVersions($view, $file, $filename, $uniqueFilename, $location, $timestamp) {
+ $size = 0;
+
+ if (\OCP\App::isEnabled('files_versions')) {
+ // disable proxy to prevent recursive calls
+ $proxyStatus = \OC_FileProxy::$enabled;
+ \OC_FileProxy::$enabled = false;
+
+ $user = \OCP\User::getUser();
+ $rootView = new \OC\Files\View('/');
+
+ $target = \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $uniqueFilename);
+
+ list($owner, $ownerPath) = self::getUidAndFilename($target);
+
+ if ($timestamp) {
+ $versionedFile = $filename;
+ } else {
+ $versionedFile = $file;
+ }
+
+ if ($view->is_dir('/files_trashbin/versions/' . $file)) {
+ $size += self::calculateSize(new \OC\Files\View('/' . $user . '/' . 'files_trashbin/versions/' . $file));
+ $rootView->rename(\OC\Files\Filesystem::normalizePath($user . '/files_trashbin/versions/' . $file), \OC\Files\Filesystem::normalizePath($owner . '/files_versions/' . $ownerPath));
+ } else if ($versions = self::getVersionsFromTrash($versionedFile, $timestamp)) {
+ foreach ($versions as $v) {
+ if ($timestamp) {
+ $size += $view->filesize('files_trashbin/versions/' . $versionedFile . '.v' . $v . '.d' . $timestamp);
+ $rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v . '.d' . $timestamp, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
+ } else {
+ $size += $view->filesize('files_trashbin/versions/' . $versionedFile . '.v' . $v);
+ $rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
+ }
+ }
+ }
+
+ // enable proxy
+ \OC_FileProxy::$enabled = $proxyStatus;
+ }
+ return $size;
+ }
+
+ /**
+ * @brief restore encryption keys from trash bin
+ *
+ * @param \OC\Files\View $view
+ * @param $file complete path to file
+ * @param $filename name of file
+ * @param $uniqueFilename new file name to restore the file without overwriting existing files
+ * @param $location location of file
+ * @param $timestamp deleteion time
+ *
+ * @return size of restored encrypted file
+ */
+ private static function restoreEncryptionKeys($view, $file, $filename, $uniqueFilename, $location, $timestamp) {
+ // Take care of encryption keys TODO! Get '.key' in file between file name and delete date (also for permanent delete!)
+ $size = 0;
+ if (\OCP\App::isEnabled('files_encryption')) {
+ $user = \OCP\User::getUser();
+ $rootView = new \OC\Files\View('/');
+
+ $target = \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $uniqueFilename);
+
+ list($owner, $ownerPath) = self::getUidAndFilename($target);
+
+ $util = new \OCA\Encryption\Util(new \OC_FilesystemView('/'), $user);
+
+ if ($util->isSystemWideMountPoint($ownerPath)) {
+ $baseDir = '/files_encryption/';
+ } else {
+ $baseDir = $owner . '/files_encryption/';
+ }
+
+ $path_parts = pathinfo($file);
+ $source_location = $path_parts['dirname'];
+
+ if ($view->is_dir('/files_trashbin/keyfiles/' . $file)) {
+ if ($source_location != '.') {
+ $keyfile = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/keyfiles/' . $source_location . '/' . $filename);
+ $sharekey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $source_location . '/' . $filename);
+ } else {
+ $keyfile = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/keyfiles/' . $filename);
+ $sharekey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $filename);
+ }
+ } else {
+ $keyfile = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/keyfiles/' . $source_location . '/' . $filename . '.key');
+ }
+
+ if ($timestamp) {
+ $keyfile .= '.d' . $timestamp;
+ }
+
+ // disable proxy to prevent recursive calls
+ $proxyStatus = \OC_FileProxy::$enabled;
+ \OC_FileProxy::$enabled = false;
+
+ if ($rootView->file_exists($keyfile)) {
+ // handle directory
+ if ($rootView->is_dir($keyfile)) {
+
+ // handle keyfiles
+ $size += self::calculateSize(new \OC\Files\View($keyfile));
+ $rootView->rename($keyfile, $baseDir . '/keyfiles/' . $ownerPath);
+
+ // handle share-keys
+ if ($timestamp) {
+ $sharekey .= '.d' . $timestamp;
+ }
+ $size += self::calculateSize(new \OC\Files\View($sharekey));
+ $rootView->rename($sharekey, $baseDir . '/share-keys/' . $ownerPath);
+ } else {
+ // handle keyfiles
+ $size += $rootView->filesize($keyfile);
+ $rootView->rename($keyfile, $baseDir . '/keyfiles/' . $ownerPath . '.key');
+
+ // handle share-keys
+ $ownerShareKey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $source_location . '/' . $filename . '.' . $user . '.shareKey');
+ if ($timestamp) {
+ $ownerShareKey .= '.d' . $timestamp;
+ }
+
+ $size += $rootView->filesize($ownerShareKey);
+
+ // move only owners key
+ $rootView->rename($ownerShareKey, $baseDir . '/share-keys/' . $ownerPath . '.' . $user . '.shareKey');
+
+ // try to re-share if file is shared
+ $filesystemView = new \OC_FilesystemView('/');
+ $session = new \OCA\Encryption\Session($filesystemView);
+ $util = new \OCA\Encryption\Util($filesystemView, $user);
+
+ // fix the file size
+ $absolutePath = \OC\Files\Filesystem::normalizePath('/' . $owner . '/files/' . $ownerPath);
+ $util->fixFileSize($absolutePath);
+
+ // get current sharing state
+ $sharingEnabled = \OCP\Share::isEnabled();
+
+ // get users sharing this file
+ $usersSharing = $util->getSharingUsersArray($sharingEnabled, $target, $user);
+
+ // Attempt to set shareKey
+ $util->setSharedFileKeyfiles($session, $usersSharing, $target);
+ }
+ }
+
+ // enable proxy
+ \OC_FileProxy::$enabled = $proxyStatus;
+ }
+ return $size;
+ }
+
+ /**
+ * @brief delete file from trash bin permanently
+ *
+ * @param $filename path to the file
+ * @param $timestamp of deletion time
+ *
+ * @return size of deleted files
+ */
+ public static function delete($filename, $timestamp = null) {
+ $user = \OCP\User::getUser();
+ $view = new \OC\Files\View('/' . $user);
+ $size = 0;
+
+ $trashbinSize = self::getTrashbinSize($user);
+ if ($trashbinSize === false || $trashbinSize < 0) {
+ $trashbinSize = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
+ }
+
+ if ($timestamp) {
+ $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=? AND `id`=? AND `timestamp`=?');
+ $query->execute(array($user, $filename, $timestamp));
+ $file = $filename . '.d' . $timestamp;
+ } else {
+ $file = $filename;
+ }
+
+ $size += self::deleteVersions($view, $file, $filename, $timestamp);
+ $size += self::deleteEncryptionKeys($view, $file, $filename, $timestamp);
+
+ if ($view->is_dir('/files_trashbin/files/' . $file)) {
+ $size += self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin/files/' . $file));
+ } else {
+ $size += $view->filesize('/files_trashbin/files/' . $file);
+ }
+ $view->unlink('/files_trashbin/files/' . $file);
+ $trashbinSize -= $size;
+ self::setTrashbinSize($user, $trashbinSize);
+
+ return $size;
+ }
+
+ private static function deleteVersions($view, $file, $filename, $timestamp) {
+ $size = 0;
+ if (\OCP\App::isEnabled('files_versions')) {
+ $user = \OCP\User::getUser();
+ if ($view->is_dir('files_trashbin/versions/' . $file)) {
+ $size += self::calculateSize(new \OC\Files\view('/' . $user . '/files_trashbin/versions/' . $file));
+ $view->unlink('files_trashbin/versions/' . $file);
+ } else if ($versions = self::getVersionsFromTrash($filename, $timestamp)) {
+ foreach ($versions as $v) {
+ if ($timestamp) {
+ $size += $view->filesize('/files_trashbin/versions/' . $filename . '.v' . $v . '.d' . $timestamp);
+ $view->unlink('/files_trashbin/versions/' . $filename . '.v' . $v . '.d' . $timestamp);
+ } else {
+ $size += $view->filesize('/files_trashbin/versions/' . $filename . '.v' . $v);
+ $view->unlink('/files_trashbin/versions/' . $filename . '.v' . $v);
+ }
+ }
+ }
+ }
+ return $size;
+ }
+
+ private static function deleteEncryptionKeys($view, $file, $filename, $timestamp) {
+ $size = 0;
+ if (\OCP\App::isEnabled('files_encryption')) {
+ $user = \OCP\User::getUser();
+
+ if ($view->is_dir('/files_trashbin/files/' . $file)) {
+ $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/' . $filename);
+ $sharekeys = \OC\Files\Filesystem::normalizePath('files_trashbin/share-keys/' . $filename);
+ } else {
+ $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/' . $filename . '.key');
+ $sharekeys = \OC\Files\Filesystem::normalizePath('files_trashbin/share-keys/' . $filename . '.' . $user . '.shareKey');
+ }
+ if ($timestamp) {
+ $keyfile .= '.d' . $timestamp;
+ $sharekeys .= '.d' . $timestamp;
+ }
+ if ($view->file_exists($keyfile)) {
+ if ($view->is_dir($keyfile)) {
+ $size += self::calculateSize(new \OC\Files\View('/' . $user . '/' . $keyfile));
+ $size += self::calculateSize(new \OC\Files\View('/' . $user . '/' . $sharekeys));
+ } else {
+ $size += $view->filesize($keyfile);
+ $size += $view->filesize($sharekeys);
+ }
+ $view->unlink($keyfile);
+ $view->unlink($sharekeys);
+ }
+ }
+ return $size;
+ }
+
+ /**
+ * check to see whether a file exists in trashbin
+ * @param $filename path to the file
+ * @param $timestamp of deletion time
+ * @return true if file exists, otherwise false
+ */
+ public static function file_exists($filename, $timestamp = null) {
+ $user = \OCP\User::getUser();
+ $view = new \OC\Files\View('/' . $user);
+
+ if ($timestamp) {
+ $filename = $filename . '.d' . $timestamp;
+ } else {
+ $filename = $filename;
+ }
+
+ $target = \OC\Files\Filesystem::normalizePath('files_trashbin/files/' . $filename);
+ return $view->file_exists($target);
+ }
+
+ /**
+ * @brief deletes used space for trash bin in db if user was deleted
+ *
+ * @param type $uid id of deleted user
+ * @return result of db delete operation
+ */
+ public static function deleteUser($uid) {
+ $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=?');
+ $result = $query->execute(array($uid));
+ if ($result) {
+ $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trashsize` WHERE `user`=?');
+ return $query->execute(array($uid));
+ }
+ return false;
+ }
+
+ /**
+ * calculate remaining free space for trash bin
+ *
+ * @param $trashbinSize current size of the trash bin
+ * @return available free space for trash bin
+ */
+ private static function calculateFreeSpace($trashbinSize) {
+ $softQuota = true;
+ $user = \OCP\User::getUser();
+ $quota = \OC_Preferences::getValue($user, 'files', 'quota');
+ $view = new \OC\Files\View('/' . $user);
+ if ($quota === null || $quota === 'default') {
+ $quota = \OC_Appconfig::getValue('files', 'default_quota');
+ }
+ if ($quota === null || $quota === 'none') {
+ $quota = \OC\Files\Filesystem::free_space('/');
+ $softQuota = false;
+ } else {
+ $quota = \OCP\Util::computerFileSize($quota);
+ }
+
+ // calculate available space for trash bin
+ // subtract size of files and current trash bin size from quota
+ if ($softQuota) {
+ $rootInfo = $view->getFileInfo('/files/');
+ $free = $quota - $rootInfo['size']; // remaining free space for user
+ if ($free > 0) {
+ $availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $trashbinSize; // how much space can be used for versions
+ } else {
+ $availableSpace = $free - $trashbinSize;
+ }
+ } else {
+ $availableSpace = $quota;
+ }
+
+ return $availableSpace;
+ }
+
+ /**
+ * @brief resize trash bin if necessary after a new file was added to ownCloud
+ * @param string $user user id
+ */
+ public static function resizeTrash($user) {
+
+ $size = self::getTrashbinSize($user);
+
+ if ($size === false || $size < 0) {
+ $size = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
+ }
+
+ $freeSpace = self::calculateFreeSpace($size);
+
+ if ($freeSpace < 0) {
+ $newSize = $size - self::expire($size);
+ if ($newSize !== $size) {
+ self::setTrashbinSize($user, $newSize);
+ }
+ }
+ }
+
+ /**
+ * clean up the trash bin
+ * @param current size of the trash bin
+ * @return size of expired files
+ */
+ private static function expire($trashbinSize) {
+
+ $user = \OCP\User::getUser();
+ $view = new \OC\Files\View('/' . $user);
+ $availableSpace = self::calculateFreeSpace($trashbinSize);
+ $size = 0;
+
+ $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) {
+ $size += self::delete($filename, $timestamp);
+ \OC_Log::write('files_trashbin', 'remove "' . $filename . '" fom trash bin because it is older than ' . $retention_obligation, \OC_log::INFO);
+ }
+ }
+ $availableSpace += $size;
+ // if size limit for trash bin reached, delete oldest files in trash bin
+ if ($availableSpace < 0) {
+ $query = \OC_DB::prepare('SELECT `location`,`type`,`id`,`timestamp` FROM `*PREFIX*files_trash`'
+ . ' WHERE `user`=? ORDER BY `timestamp` ASC');
+ $result = $query->execute(array($user))->fetchAll();
+ $length = count($result);
+ $i = 0;
+ while ($i < $length && $availableSpace < 0) {
+ $tmp = self::delete($result[$i]['id'], $result[$i]['timestamp']);
+ \OC_Log::write('files_trashbin', 'remove "' . $result[$i]['id'] . '" (' . $tmp . 'B) to meet the limit of trash bin size (50% of available quota)', \OC_log::INFO);
+ $availableSpace += $tmp;
+ $size += $tmp;
+ $i++;
+ }
+ }
+
+ return $size;
+ }
+
+ /**
+ * 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) {
+ $size = 0;
+ if ($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)) {
+ $size += self::copy_recursive($pathDir, $destination . '/' . $i['name'], $view);
+ } else {
+ $size += $view->filesize('files' . $pathDir);
+ $view->copy('files' . $pathDir, $destination . '/' . $i['name']);
+ $view->touch($destination . '/' . $i['name'], $view->filemtime('files' . $pathDir));
+ }
+ }
+ } else {
+ $size += $view->filesize('files' . $source);
+ $view->copy('files' . $source, $destination);
+ $view->touch($destination, $view->filemtime('files' . $source));
+ }
+ return $size;
+ }
+
+ /**
+ * 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\Files\View('/' . \OCP\User::getUser() . '/files_trashbin/versions');
+ $versionsName = $view->getLocalFile($filename) . '.v';
+ $escapedVersionsName = preg_replace('/(\*|\?|\[)/', '[$1]', $versionsName);
+ $versions = array();
+ if ($timestamp) {
+ // fetch for old versions
+ $matches = glob($escapedVersionsName . '*.d' . $timestamp);
+ $offset = -strlen($timestamp) - 2;
+ } else {
+ $matches = glob($escapedVersionsName . '*');
+ }
+
+ 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 $view filesystem view relative to users root directory
+ * @return string with unique extension
+ */
+ private static function getUniqueFilename($location, $filename, $view) {
+ $ext = pathinfo($filename, PATHINFO_EXTENSION);
+ $name = pathinfo($filename, PATHINFO_FILENAME);
+ $l = \OC_L10N::get('files_trashbin');
+
+ // if extension is not empty we set a dot in front of it
+ if ($ext !== '') {
+ $ext = '.' . $ext;
+ }
+
+ if ($view->file_exists('files' . $location . '/' . $filename)) {
+ $i = 2;
+ $uniqueName = $name . " (".$l->t("restored").")". $ext;
+ while ($view->file_exists('files' . $location . '/' . $uniqueName)) {
+ $uniqueName = $name . " (".$l->t("restored") . " " . $i . ")" . $ext;
+ $i++;
+ }
+
+ return $uniqueName;
+ }
+
+ return $filename;
+ }
+
+ /**
+ * @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 ($result) {
+ return (int)$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));
+ }
+
+ /**
+ * register hooks
+ */
+ public static function registerHooks() {
+ //Listen to delete file signal
+ \OCP\Util::connectHook('OC_Filesystem', 'delete', "OCA\Files_Trashbin\Hooks", "remove_hook");
+ //Listen to delete user signal
+ \OCP\Util::connectHook('OC_User', 'pre_deleteUser', "OCA\Files_Trashbin\Hooks", "deleteUser_hook");
+ //Listen to post write hook
+ \OCP\Util::connectHook('OC_Filesystem', 'post_write', "OCA\Files_Trashbin\Hooks", "post_write_hook");
+ }
+
+ /**
+ * @brief check if trash bin is empty for a given user
+ * @param string $user
+ */
+ public static function isEmpty($user) {
+
+ $view = new \OC\Files\View('/' . $user . '/files_trashbin');
+ $content = $view->getDirectoryContent('/files');
+
+ if ($content) {
+ return false;
+ }
+
+ return true;
+ }
+
+ public static function preview_icon($path) {
+ return \OC_Helper::linkToRoute( 'core_ajax_trashbin_preview', array('x' => 36, 'y' => 36, 'file' => urlencode($path) ));
+ }
+}