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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bastien Ho <bastienho@urbancube.fr>
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Florin Peter <github@florin-peter.de>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Juan Pablo Villafáñez <jvillafanez@solidgear.es>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Qingping Hou <dave2008713@gmail.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Sjors van der Pluijm <sjors@desjors.nl>
* @author Steven Bühner <buehner@me.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Victor Dubiniuk <dubiniuk@owncloud.com>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\Files_Trashbin;
use OC\Files\Filesystem;
use OC\Files\View;
use OCA\Files_Trashbin\AppInfo\Application;
use OCA\Files_Trashbin\Command\Expire;
use OCP\Files\File;
use OCP\Files\Folder;
use OCP\Files\NotFoundException;
use OCP\User;
class Trashbin {
// unit: percentage; 50% of available disk space/quota
const DEFAULTMAXSIZE = 50;
/**
* Whether versions have already be rescanned during this PHP request
*
* @var bool
*/
private static $scannedVersions = false;
/**
* Ensure we don't need to scan the file during the move to trash
* by triggering the scan in the pre-hook
*
* @param array $params
*/
public static function ensureFileScannedHook($params) {
try {
self::getUidAndFilename($params['path']);
} catch (NotFoundException $e) {
// nothing to scan for non existing files
}
}
/**
* get the UID of the owner of the file and the path to the file relative to
* owners files folder
*
* @param string $filename
* @return array
* @throws \OC\User\NoUserException
*/
public static function getUidAndFilename($filename) {
$uid = Filesystem::getOwner($filename);
$userManager = \OC::$server->getUserManager();
// if the user with the UID doesn't exists, e.g. because the UID points
// to a remote user with a federated cloud ID we use the current logged-in
// user. We need a valid local user to move the file to the right trash bin
if (!$userManager->userExists($uid)) {
$uid = User::getUser();
}
if (!$uid) {
// no owner, usually because of share link from ext storage
return [null, null];
}
Filesystem::initMountPoints($uid);
if ($uid !== User::getUser()) {
$info = Filesystem::getFileInfo($filename);
$ownerView = new View('/' . $uid . '/files');
try {
$filename = $ownerView->getPath($info['fileid']);
} catch (NotFoundException $e) {
$filename = null;
}
}
return [$uid, $filename];
}
/**
* get original location of files for user
*
* @param string $user
* @return array (filename => array (timestamp => original location))
*/
public static function getLocations($user) {
$query = \OC_DB::prepare('SELECT `id`, `timestamp`, `location`'
. ' FROM `*PREFIX*files_trash` WHERE `user`=?');
$result = $query->execute(array($user));
$array = array();
while ($row = $result->fetchRow()) {
if (isset($array[$row['id']])) {
$array[$row['id']][$row['timestamp']] = $row['location'];
} else {
$array[$row['id']] = array($row['timestamp'] => $row['location']);
}
}
return $array;
}
/**
* get original location of file
*
* @param string $user
* @param string $filename
* @param string $timestamp
* @return string original location
*/
public static function getLocation($user, $filename, $timestamp) {
$query = \OC_DB::prepare('SELECT `location` FROM `*PREFIX*files_trash`'
. ' WHERE `user`=? AND `id`=? AND `timestamp`=?');
$result = $query->execute(array($user, $filename, $timestamp))->fetchAll();
if (isset($result[0]['location'])) {
return $result[0]['location'];
} else {
return false;
}
}
private static function setUpTrash($user) {
$view = new 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/keys')) {
$view->mkdir('files_trashbin/keys');
}
}
/**
* copy file to owners trash
*
* @param string $sourcePath
* @param string $owner
* @param string $targetPath
* @param $user
* @param integer $timestamp
*/
private static function copyFilesToUser($sourcePath, $owner, $targetPath, $user, $timestamp) {
self::setUpTrash($owner);
$targetFilename = basename($targetPath);
$targetLocation = dirname($targetPath);
$sourceFilename = basename($sourcePath);
$view = new View('/');
$target = $user . '/files_trashbin/files/' . $targetFilename . '.d' . $timestamp;
$source = $owner . '/files_trashbin/files/' . $sourceFilename . '.d' . $timestamp;
self::copy_recursive($source, $target, $view);
if ($view->file_exists($target)) {
$query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`user`) VALUES (?,?,?,?)");
$result = $query->execute(array($targetFilename, $timestamp, $targetLocation, $user));
if (!$result) {
\OCP\Util::writeLog('files_trashbin', 'trash bin database couldn\'t be updated for the files owner', \OCP\Util::ERROR);
}
}
}
/**
* move file to the trash bin
*
* @param string $file_path path to the deleted file/directory relative to the files root directory
* @param bool $ownerOnly delete for owner only (if file gets moved out of a shared folder)
*
* @return bool
*/
public static function move2trash($file_path, $ownerOnly = false) {
// get the user for which the filesystem is setup
$root = Filesystem::getRoot();
list(, $user) = explode('/', $root);
list($owner, $ownerPath) = self::getUidAndFilename($file_path);
// if no owner found (ex: ext storage + share link), will use the current user's trashbin then
if (is_null($owner)) {
$owner = $user;
$ownerPath = $file_path;
}
$ownerView = new View('/' . $owner);
// file has been deleted in between
if (is_null($ownerPath) || $ownerPath === '' || !$ownerView->file_exists('/files/' . $ownerPath)) {
return true;
}
self::setUpTrash($user);
if ($owner !== $user) {
// also setup for owner
self::setUpTrash($owner);
}
$path_parts = pathinfo($ownerPath);
$filename = $path_parts['basename'];
$location = $path_parts['dirname'];
$timestamp = time();
// disable proxy to prevent recursive calls
$trashPath = '/files_trashbin/files/' . $filename . '.d' . $timestamp;
/** @var \OC\Files\Storage\Storage $trashStorage */
list($trashStorage, $trashInternalPath) = $ownerView->resolvePath($trashPath);
/** @var \OC\Files\Storage\Storage $sourceStorage */
list($sourceStorage, $sourceInternalPath) = $ownerView->resolvePath('/files/' . $ownerPath);
try {
$moveSuccessful = true;
if ($trashStorage->file_exists($trashInternalPath)) {
$trashStorage->unlink($trashInternalPath);
}
$trashStorage->moveFromStorage($sourceStorage, $sourceInternalPath, $trashInternalPath);
} catch (\OCA\Files_Trashbin\Exceptions\CopyRecursiveException $e) {
$moveSuccessful = false;
if ($trashStorage->file_exists($trashInternalPath)) {
$trashStorage->unlink($trashInternalPath);
}
\OCP\Util::writeLog('files_trashbin', 'Couldn\'t move ' . $file_path . ' to the trash bin', \OCP\Util::ERROR);
}
if ($sourceStorage->file_exists($sourceInternalPath)) { // failed to delete the original file, abort
if ($sourceStorage->is_dir($sourceInternalPath)) {
$sourceStorage->rmdir($sourceInternalPath);
} else {
$sourceStorage->unlink($sourceInternalPath);
}
return false;
}
$trashStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $trashInternalPath);
if ($moveSuccessful) {
$query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`user`) VALUES (?,?,?,?)");
$result = $query->execute(array($filename, $timestamp, $location, $owner));
if (!$result) {
\OCP\Util::writeLog('files_trashbin', 'trash bin database couldn\'t be updated', \OCP\Util::ERROR);
}
\OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_moveToTrash', array('filePath' => Filesystem::normalizePath($file_path),
'trashPath' => Filesystem::normalizePath($filename . '.d' . $timestamp)));
self::retainVersions($filename, $owner, $ownerPath, $timestamp);
// if owner !== user we need to also add a copy to the users trash
if ($user !== $owner && $ownerOnly === false) {
self::copyFilesToUser($ownerPath, $owner, $file_path, $user, $timestamp);
}
}
self::scheduleExpire($user);
// if owner !== user we also need to update the owners trash size
if ($owner !== $user) {
self::scheduleExpire($owner);
}
return $moveSuccessful;
}
/**
* Move file versions to trash so that they can be restored later
*
* @param string $filename of deleted file
* @param string $owner owner user id
* @param string $ownerPath path relative to the owner's home storage
* @param integer $timestamp when the file was deleted
*/
private static function retainVersions($filename, $owner, $ownerPath, $timestamp) {
if (\OCP\App::isEnabled('files_versions') && !empty($ownerPath)) {
$user = User::getUser();
$rootView = new View('/');
if ($rootView->is_dir($owner . '/files_versions/' . $ownerPath)) {
if ($owner !== $user) {
self::copy_recursive($owner . '/files_versions/' . $ownerPath, $owner . '/files_trashbin/versions/' . basename($ownerPath) . '.d' . $timestamp, $rootView);
}
self::move($rootView, $owner . '/files_versions/' . $ownerPath, $user . '/files_trashbin/versions/' . $filename . '.d' . $timestamp);
} else if ($versions = \OCA\Files_Versions\Storage::getVersions($owner, $ownerPath)) {
foreach ($versions as $v) {
if ($owner !== $user) {
self::copy($rootView, $owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $owner . '/files_trashbin/versions/' . $v['name'] . '.v' . $v['version'] . '.d' . $timestamp);
}
self::move($rootView, $owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $user . '/files_trashbin/versions/' . $filename . '.v' . $v['version'] . '.d' . $timestamp);
}
}
}
}
/**
* Move a file or folder on storage level
*
* @param View $view
* @param string $source
* @param string $target
* @return bool
*/
private static function move(View $view, $source, $target) {
/** @var \OC\Files\Storage\Storage $sourceStorage */
list($sourceStorage, $sourceInternalPath) = $view->resolvePath($source);
/** @var \OC\Files\Storage\Storage $targetStorage */
list($targetStorage, $targetInternalPath) = $view->resolvePath($target);
/** @var \OC\Files\Storage\Storage $ownerTrashStorage */
$result = $targetStorage->moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
if ($result) {
$targetStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
}
return $result;
}
/**
* Copy a file or folder on storage level
*
* @param View $view
* @param string $source
* @param string $target
* @return bool
*/
private static function copy(View $view, $source, $target) {
/** @var \OC\Files\Storage\Storage $sourceStorage */
list($sourceStorage, $sourceInternalPath) = $view->resolvePath($source);
/** @var \OC\Files\Storage\Storage $targetStorage */
list($targetStorage, $targetInternalPath) = $view->resolvePath($target);
/** @var \OC\Files\Storage\Storage $ownerTrashStorage */
$result = $targetStorage->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
if ($result) {
$targetStorage->getUpdater()->update($targetInternalPath);
}
return $result;
}
/**
* Restore a file or folder from trash bin
*
* @param string $file path to the deleted file/folder relative to "files_trashbin/files/",
* including the timestamp suffix ".d12345678"
* @param string $filename name of the file/folder
* @param int $timestamp time when the file/folder was deleted
*
* @return bool true on success, false otherwise
*/
public static function restore($file, $filename, $timestamp) {
$user = User::getUser();
$view = new View('/' . $user);
$location = '';
if ($timestamp) {
$location = self::getLocation($user, $filename, $timestamp);
if ($location === false) {
\OCP\Util::writeLog('files_trashbin', 'trash bin database inconsistent! ($user: ' . $user . ' $filename: ' . $filename . ', $timestamp: ' . $timestamp . ')', \OCP\Util::ERROR);
} else {
// if location no longer exists, restore file in the root directory
if ($location !== '/' &&
(!$view->is_dir('files/' . $location) ||
!$view->isCreatable('files/' . $location))
) {
$location = '';
}
}
}
// we need a extension in case a file/dir with the same name already exists
$uniqueFilename = self::getUniqueFilename($location, $filename, $view);
$source = Filesystem::normalizePath('files_trashbin/files/' . $file);
$target = Filesystem::normalizePath('files/' . $location . '/' . $uniqueFilename);
if (!$view->file_exists($source)) {
return false;
}
$mtime = $view->filemtime($source);
// 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' => Filesystem::normalizePath('/' . $location . '/' . $uniqueFilename),
'trashPath' => Filesystem::normalizePath($file)));
self::restoreVersions($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));
}
return true;
}
return false;
}
/**
* restore versions from trash bin
*
* @param View $view file view
* @param string $file complete path to file
* @param string $filename name of file once it was deleted
* @param string $uniqueFilename new file name to restore the file without overwriting existing files
* @param string $location location if file
* @param int $timestamp deletion time
* @return false|null
*/
private static function restoreVersions(View $view, $file, $filename, $uniqueFilename, $location, $timestamp) {
if (\OCP\App::isEnabled('files_versions')) {
$user = User::getUser();
$rootView = new View('/');
$target = Filesystem::normalizePath('/' . $location . '/' . $uniqueFilename);
list($owner, $ownerPath) = self::getUidAndFilename($target);
// file has been deleted in between
if (empty($ownerPath)) {
return false;
}
if ($timestamp) {
$versionedFile = $filename;
} else {
$versionedFile = $file;
}
if ($view->is_dir('/files_trashbin/versions/' . $file)) {
$rootView->rename(Filesystem::normalizePath($user . '/files_trashbin/versions/' . $file), Filesystem::normalizePath($owner . '/files_versions/' . $ownerPath));
} else if ($versions = self::getVersionsFromTrash($versionedFile, $timestamp, $user)) {
foreach ($versions as $v) {
if ($timestamp) {
$rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v . '.d' . $timestamp, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
} else {
$rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
}
}
}
}
}
/**
* delete all files from the trash
*/
public static function deleteAll() {
$user = User::getUser();
$userRoot = \OC::$server->getUserFolder($user)->getParent();
$view = new View('/' . $user);
$fileInfos = $view->getDirectoryContent('files_trashbin/files');
try {
$trash = $userRoot->get('files_trashbin');
} catch (NotFoundException $e) {
return false;
}
// Array to store the relative path in (after the file is deleted, the view won't be able to relativise the path anymore)
$filePaths = array();
foreach($fileInfos as $fileInfo){
$filePaths[] = $view->getRelativePath($fileInfo->getPath());
}
unset($fileInfos); // save memory
// Bulk PreDelete-Hook
\OC_Hook::emit('\OCP\Trashbin', 'preDeleteAll', array('paths' => $filePaths));
// Single-File Hooks
foreach($filePaths as $path){
self::emitTrashbinPreDelete($path);
}
// actual file deletion
$trash->delete();
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=?');
$query->execute(array($user));
// Bulk PostDelete-Hook
\OC_Hook::emit('\OCP\Trashbin', 'deleteAll', array('paths' => $filePaths));
// Single-File Hooks
foreach($filePaths as $path){
self::emitTrashbinPostDelete($path);
}
$trash = $userRoot->newFolder('files_trashbin');
$trash->newFolder('files');
return true;
}
/**
* wrapper function to emit the 'preDelete' hook of \OCP\Trashbin before a file is deleted
* @param string $path
*/
protected static function emitTrashbinPreDelete($path){
\OC_Hook::emit('\OCP\Trashbin', 'preDelete', array('path' => $path));
}
/**
* wrapper function to emit the 'delete' hook of \OCP\Trashbin after a file has been deleted
* @param string $path
*/
protected static function emitTrashbinPostDelete($path){
\OC_Hook::emit('\OCP\Trashbin', 'delete', array('path' => $path));
}
/**
* delete file from trash bin permanently
*
* @param string $filename path to the file
* @param string $user
* @param int $timestamp of deletion time
*
* @return int size of deleted files
*/
public static function delete($filename, $user, $timestamp = null) {
$userRoot = \OC::$server->getUserFolder($user)->getParent();
$view = new View('/' . $user);
$size = 0;
if ($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, $user);
try {
$node = $userRoot->get('/files_trashbin/files/' . $file);
} catch (NotFoundException $e) {
return $size;
}
if ($node instanceof Folder) {
$size += self::calculateSize(new View('/' . $user . '/files_trashbin/files/' . $file));
} else if ($node instanceof File) {
$size += $view->filesize('/files_trashbin/files/' . $file);
}
self::emitTrashbinPreDelete('/files_trashbin/files/' . $file);
$node->delete();
self::emitTrashbinPostDelete('/files_trashbin/files/' . $file);
return $size;
}
/**
* @param View $view
* @param string $file
* @param string $filename
* @param integer|null $timestamp
* @param string $user
* @return int
*/
private static function deleteVersions(View $view, $file, $filename, $timestamp, $user) {
$size = 0;
if (\OCP\App::isEnabled('files_versions')) {
if ($view->is_dir('files_trashbin/versions/' . $file)) {
$size += self::calculateSize(new View('/' . $user . '/files_trashbin/versions/' . $file));
$view->unlink('files_trashbin/versions/' . $file);
} else if ($versions = self::getVersionsFromTrash($filename, $timestamp, $user)) {
foreach ($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;
}
/**
* check to see whether a file exists in trashbin
*
* @param string $filename path to the file
* @param int $timestamp of deletion time
* @return bool true if file exists, otherwise false
*/
public static function file_exists($filename, $timestamp = null) {
$user = User::getUser();
$view = new View('/' . $user);
if ($timestamp) {
$filename = $filename . '.d' . $timestamp;
} else {
$filename = $filename;
}
$target = Filesystem::normalizePath('files_trashbin/files/' . $filename);
return $view->file_exists($target);
}
/**
* deletes used space for trash bin in db if user was deleted
*
* @param string $uid id of deleted user
* @return bool result of db delete operation
*/
public static function deleteUser($uid) {
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=?');
return $query->execute(array($uid));
}
/**
* calculate remaining free space for trash bin
*
* @param integer $trashbinSize current size of the trash bin
* @param string $user
* @return int available free space for trash bin
*/
private static function calculateFreeSpace($trashbinSize, $user) {
$softQuota = true;
$userObject = \OC::$server->getUserManager()->get($user);
if(is_null($userObject)) {
return 0;
}
$quota = $userObject->getQuota();
if ($quota === null || $quota === 'none') {
$quota = Filesystem::free_space('/');
$softQuota = false;
// inf or unknown free space
if ($quota < 0) {
$quota = PHP_INT_MAX;
}
} 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) {
$userFolder = \OC::$server->getUserFolder($user);
if(is_null($userFolder)) {
return 0;
}
$free = $quota - $userFolder->getSize(); // remaining free space for user
if ($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;
}
/**
* resize trash bin if necessary after a new file was added to Nextcloud
*
* @param string $user user id
*/
public static function resizeTrash($user) {
$size = self::getTrashbinSize($user);
$freeSpace = self::calculateFreeSpace($size, $user);
if ($freeSpace < 0) {
self::scheduleExpire($user);
}
}
/**
* clean up the trash bin
*
* @param string $user
*/
public static function expire($user) {
$trashBinSize = self::getTrashbinSize($user);
$availableSpace = self::calculateFreeSpace($trashBinSize, $user);
$dirContent = Helper::getTrashFiles('/', $user, 'mtime');
// delete all files older then $retention_obligation
list($delSize, $count) = self::deleteExpiredFiles($dirContent, $user);
$availableSpace += $delSize;
// delete files from trash until we meet the trash bin size limit again
self::deleteFiles(array_slice($dirContent, $count), $user, $availableSpace);
}
/**
* @param string $user
*/
private static function scheduleExpire($user) {
// let the admin disable auto expire
$application = new Application();
$expiration = $application->getContainer()->query('Expiration');
if ($expiration->isEnabled()) {
\OC::$server->getCommandBus()->push(new Expire($user));
}
}
/**
* if the size limit for the trash bin is reached, we delete the oldest
* files in the trash bin until we meet the limit again
*
* @param array $files
* @param string $user
* @param int $availableSpace available disc space
* @return int size of deleted files
*/
protected static function deleteFiles($files, $user, $availableSpace) {
$application = new Application();
$expiration = $application->getContainer()->query('Expiration');
$size = 0;
if ($availableSpace < 0) {
foreach ($files as $file) {
if ($availableSpace < 0 && $expiration->isExpired($file['mtime'], true)) {
$tmp = self::delete($file['name'], $user, $file['mtime']);
\OCP\Util::writeLog('files_trashbin', 'remove "' . $file['name'] . '" (' . $tmp . 'B) to meet the limit of trash bin size (50% of available quota)', \OCP\Util::INFO);
$availableSpace += $tmp;
$size += $tmp;
} else {
break;
}
}
}
return $size;
}
/**
* delete files older then max storage time
*
* @param array $files list of files sorted by mtime
* @param string $user
* @return integer[] size of deleted files and number of deleted files
*/
public static function deleteExpiredFiles($files, $user) {
$application = new Application();
$expiration = $application->getContainer()->query('Expiration');
$size = 0;
$count = 0;
foreach ($files as $file) {
$timestamp = $file['mtime'];
$filename = $file['name'];
if ($expiration->isExpired($timestamp)) {
$count++;
$size += self::delete($filename, $user, $timestamp);
\OC::$server->getLogger()->info(
'Remove "' . $filename . '" from trashbin because it exceeds max retention obligation term.',
['app' => 'files_trashbin']
);
} else {
break;
}
}
return array($size, $count);
}
/**
* recursive copy to copy a whole directory
*
* @param string $source source path, relative to the users files directory
* @param string $destination destination path relative to the users root directoy
* @param View $view file view for the users root directory
* @return int
* @throws Exceptions\CopyRecursiveException
*/
private static function copy_recursive($source, $destination, View $view) {
$size = 0;
if ($view->is_dir($source)) {
$view->mkdir($destination);
$view->touch($destination, $view->filemtime($source));
foreach ($view->getDirectoryContent($source) as $i) {
$pathDir = $source . '/' . $i['name'];
if ($view->is_dir($pathDir)) {
$size += self::copy_recursive($pathDir, $destination . '/' . $i['name'], $view);
} else {
$size += $view->filesize($pathDir);
$result = $view->copy($pathDir, $destination . '/' . $i['name']);
if (!$result) {
throw new \OCA\Files_Trashbin\Exceptions\CopyRecursiveException();
}
$view->touch($destination . '/' . $i['name'], $view->filemtime($pathDir));
}
}
} else {
$size += $view->filesize($source);
$result = $view->copy($source, $destination);
if (!$result) {
throw new \OCA\Files_Trashbin\Exceptions\CopyRecursiveException();
}
$view->touch($destination, $view->filemtime($source));
}
return $size;
}
/**
* find all versions which belong to the file we want to restore
*
* @param string $filename name of the file which should be restored
* @param int $timestamp timestamp when the file was deleted
* @return array
*/
private static function getVersionsFromTrash($filename, $timestamp, $user) {
$view = new View('/' . $user . '/files_trashbin/versions');
$versions = array();
//force rescan of versions, local storage may not have updated the cache
if (!self::$scannedVersions) {
/** @var \OC\Files\Storage\Storage $storage */
list($storage,) = $view->resolvePath('/');
$storage->getScanner()->scan('files_trashbin/versions');
self::$scannedVersions = true;
}
if ($timestamp) {
// fetch for old versions
$matches = $view->searchRaw($filename . '.v%.d' . $timestamp);
$offset = -strlen($timestamp) - 2;
} else {
$matches = $view->searchRaw($filename . '.v%');
}
if (is_array($matches)) {
foreach ($matches as $ma) {
if ($timestamp) {
$parts = explode('.v', substr($ma['path'], 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 string $location where the file should be restored
* @param string $filename name of the file
* @param View $view filesystem view relative to users root directory
* @return string with unique extension
*/
private static function getUniqueFilename($location, $filename, View $view) {
$ext = pathinfo($filename, PATHINFO_EXTENSION);
$name = pathinfo($filename, PATHINFO_FILENAME);
$l = \OC::$server->getL10N('files_trashbin');
$location = '/' . trim($location, '/');
// 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;
}
/**
* get the size from a given root folder
*
* @param View $view file view on the root folder
* @return integer size of the folder
*/
private static function calculateSize($view) {
$root = \OC::$server->getConfig()->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data') . $view->getAbsolutePath('');
if (!file_exists($root)) {
return 0;
}
$iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($root), \RecursiveIteratorIterator::CHILD_FIRST);
$size = 0;
/**
* RecursiveDirectoryIterator on an NFS path isn't iterable with foreach
* This bug is fixed in PHP 5.5.9 or before
* See #8376
*/
$iterator->rewind();
while ($iterator->valid()) {
$path = $iterator->current();
$relpath = substr($path, strlen($root) - 1);
if (!$view->is_dir($relpath)) {
$size += $view->filesize($relpath);
}
$iterator->next();
}
return $size;
}
/**
* get current size of trash bin from a given user
*
* @param string $user user who owns the trash bin
* @return integer trash bin size
*/
private static function getTrashbinSize($user) {
$view = new View('/' . $user);
$fileInfo = $view->getFileInfo('/files_trashbin');
return isset($fileInfo['size']) ? $fileInfo['size'] : 0;
}
/**
* register hooks
*/
public static function registerHooks() {
// create storage wrapper on setup
\OCP\Util::connectHook('OC_Filesystem', 'preSetup', 'OCA\Files_Trashbin\Storage', 'setupStorage');
//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');
// pre and post-rename, disable trash logic for the copy+unlink case
\OCP\Util::connectHook('OC_Filesystem', 'delete', 'OCA\Files_Trashbin\Trashbin', 'ensureFileScannedHook');
\OCP\Util::connectHook('OC_Filesystem', 'rename', 'OCA\Files_Trashbin\Storage', 'preRenameHook');
\OCP\Util::connectHook('OC_Filesystem', 'post_rename', 'OCA\Files_Trashbin\Storage', 'postRenameHook');
}
/**
* check if trash bin is empty for a given user
*
* @param string $user
* @return bool
*/
public static function isEmpty($user) {
$view = new View('/' . $user . '/files_trashbin');
if ($view->is_dir('/files') && $dh = $view->opendir('/files')) {
while ($file = readdir($dh)) {
if (!Filesystem::isIgnoredDir($file)) {
return false;
}
}
}
return true;
}
/**
* @param $path
* @return string
*/
public static function preview_icon($path) {
return \OCP\Util::linkToRoute('core_ajax_trashbin_preview', array('x' => 32, 'y' => 32, 'file' => $path));
}
}