nextcloud/apps/files_trashbin/lib/trashbin.php

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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/>.
*
*/
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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 = 30;
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// unit: percentage; 50% of available disk space/quota
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const DEFAULTMAXSIZE = 50;
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public static function getUidAndFilename($filename) {
$uid = \OC\Files\Filesystem::getOwner($filename);
\OC\Files\Filesystem::initMountPoints($uid);
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if ($uid != \OCP\User::getUser()) {
$info = \OC\Files\Filesystem::getFileInfo($filename);
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$ownerView = new \OC\Files\View('/' . $uid . '/files');
$filename = $ownerView->getPath($info['fileid']);
}
return array($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 $result[0]['location'];
} else {
return false;
}
}
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private static function setUpTrash($user) {
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$view = new \OC\Files\View('/' . $user);
if (!$view->is_dir('files_trashbin')) {
$view->mkdir('files_trashbin');
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}
if (!$view->is_dir('files_trashbin/files')) {
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$view->mkdir('files_trashbin/files');
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}
if (!$view->is_dir('files_trashbin/versions')) {
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$view->mkdir('files_trashbin/versions');
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}
if (!$view->is_dir('files_trashbin/keyfiles')) {
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$view->mkdir('files_trashbin/keyfiles');
}
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if (!$view->is_dir('files_trashbin/share-keys')) {
$view->mkdir('files_trashbin/share-keys');
}
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}
/**
* copy file to owners trash
* @param string $sourcePath
* @param string $owner
* @param string $ownerPath
* @param integer $timestamp
*/
private static function copyFilesToOwner($sourcePath, $owner, $ownerPath, $timestamp) {
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self::setUpTrash($owner);
$ownerFilename = basename($ownerPath);
$ownerLocation = dirname($ownerPath);
$sourceFilename = basename($sourcePath);
$view = new \OC\Files\View('/');
$source = \OCP\User::getUser() . '/files_trashbin/files/' . $sourceFilename . '.d' . $timestamp;
$target = $owner . '/files_trashbin/files/' . $ownerFilename . '.d' . $timestamp;
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self::copy_recursive($source, $target, $view);
if ($view->file_exists($target)) {
$query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`user`) VALUES (?,?,?,?)");
$result = $query->execute(array($ownerFilename, $timestamp, $ownerLocation, $owner));
if (!$result) {
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\OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated for the files owner', \OC_log::ERROR);
}
}
}
/**
* move file to the trash bin
*
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* @param string $file_path path to the deleted file/directory relative to the files root directory
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*/
public static function move2trash($file_path) {
$user = \OCP\User::getUser();
$size = 0;
list($owner, $ownerPath) = self::getUidAndFilename($file_path);
// file has been deleted in between
if (empty($ownerPath)) {
return false;
}
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self::setUpTrash($user);
$view = new \OC\Files\View('/' . $user);
$path_parts = pathinfo($file_path);
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$filename = $path_parts['basename'];
$location = $path_parts['dirname'];
$timestamp = time();
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$userTrashSize = self::getTrashbinSize($user);
// disable proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
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$trashPath = '/files_trashbin/files/' . $filename . '.d' . $timestamp;
try {
$sizeOfAddedFiles = self::copy_recursive('/files/'.$file_path, $trashPath, $view);
} catch (\OCA\Files_Trashbin\Exceptions\CopyRecursiveException $e) {
$sizeOfAddedFiles = false;
if ($view->file_exists($trashPath)) {
$view->deleteAll($trashPath);
}
\OC_Log::write('files_trashbin', 'Couldn\'t move ' . $file_path . ' to the trash bin', \OC_log::ERROR);
}
\OC_FileProxy::$enabled = $proxyStatus;
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if ($sizeOfAddedFiles !== false) {
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$size = $sizeOfAddedFiles;
$query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`user`) VALUES (?,?,?,?)");
$result = $query->execute(array($filename, $timestamp, $location, $user));
if (!$result) {
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\OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated', \OC_log::ERROR);
}
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\OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_moveToTrash', array('filePath' => \OC\Files\Filesystem::normalizePath($file_path),
'trashPath' => \OC\Files\Filesystem::normalizePath($filename . '.d' . $timestamp)));
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$size += self::retainVersions($file_path, $filename, $timestamp);
$size += self::retainEncryptionKeys($file_path, $filename, $timestamp);
// if owner !== user we need to also add a copy to the owners trash
if ($user !== $owner) {
self::copyFilesToOwner($file_path, $owner, $ownerPath, $timestamp);
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}
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}
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$userTrashSize += $size;
$userTrashSize -= self::expire($userTrashSize, $user);
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// if owner !== user we also need to update the owners trash size
if ($owner !== $user) {
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$ownerTrashSize = self::getTrashbinSize($owner);
$ownerTrashSize += $size;
$ownerTrashSize -= self::expire($ownerTrashSize, $owner);
}
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}
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/**
* Move file versions to trash so that they can be restored later
*
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* @param string $file_path path to original file
* @param string $filename of deleted file
* @param integer $timestamp when the file was deleted
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*
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* @return int size of stored versions
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*/
private static function retainVersions($file_path, $filename, $timestamp) {
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$size = 0;
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if (\OCP\App::isEnabled('files_versions')) {
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// disable proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
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$user = \OCP\User::getUser();
$rootView = new \OC\Files\View('/');
list($owner, $ownerPath) = self::getUidAndFilename($file_path);
// file has been deleted in between
if (empty($ownerPath)) {
return 0;
}
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if ($rootView->is_dir($owner . '/files_versions/' . $ownerPath)) {
$size += self::calculateSize(new \OC\Files\View('/' . $owner . '/files_versions/' . $ownerPath));
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if ($owner !== $user) {
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self::copy_recursive($owner . '/files_versions/' . $ownerPath, $owner . '/files_trashbin/versions/' . basename($ownerPath) . '.d' . $timestamp, $rootView);
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}
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$rootView->rename($owner . '/files_versions/' . $ownerPath, $user . '/files_trashbin/versions/' . $filename . '.d' . $timestamp);
} else if ($versions = \OCA\Files_Versions\Storage::getVersions($owner, $ownerPath)) {
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foreach ($versions as $v) {
$size += $rootView->filesize($owner . '/files_versions' . $v['path'] . '.v' . $v['version']);
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if ($owner !== $user) {
$rootView->copy($owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $owner . '/files_trashbin/versions/' . $v['name'] . '.v' . $v['version'] . '.d' . $timestamp);
}
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$rootView->rename($owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $user . '/files_trashbin/versions/' . $filename . '.v' . $v['version'] . '.d' . $timestamp);
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}
}
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// enable proxy
\OC_FileProxy::$enabled = $proxyStatus;
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}
return $size;
}
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/**
* Move encryption keys to trash so that they can be restored later
*
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* @param string $file_path path to original file
* @param string $filename of deleted file
* @param integer $timestamp when the file was deleted
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*
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* @return int size of encryption keys
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*/
private static function retainEncryptionKeys($file_path, $filename, $timestamp) {
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$size = 0;
if (\OCP\App::isEnabled('files_encryption')) {
$user = \OCP\User::getUser();
$rootView = new \OC\Files\View('/');
list($owner, $ownerPath) = self::getUidAndFilename($file_path);
// file has been deleted in between
if (empty($ownerPath)) {
return 0;
}
$util = new \OCA\Encryption\Util(new \OC\Files\View('/'), $user);
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// disable proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
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if ($util->isSystemWideMountPoint($ownerPath)) {
$baseDir = '/files_encryption/';
} else {
$baseDir = $owner . '/files_encryption/';
}
$keyfile = \OC\Files\Filesystem::normalizePath($baseDir . '/keyfiles/' . $ownerPath);
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if ($rootView->is_dir($keyfile) || $rootView->file_exists($keyfile . '.key')) {
// move keyfiles
if ($rootView->is_dir($keyfile)) {
$size += self::calculateSize(new \OC\Files\View($keyfile));
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if ($owner !== $user) {
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self::copy_recursive($keyfile, $owner . '/files_trashbin/keyfiles/' . basename($ownerPath) . '.d' . $timestamp, $rootView);
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}
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$rootView->rename($keyfile, $user . '/files_trashbin/keyfiles/' . $filename . '.d' . $timestamp);
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} else {
$size += $rootView->filesize($keyfile . '.key');
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if ($owner !== $user) {
$rootView->copy($keyfile . '.key', $owner . '/files_trashbin/keyfiles/' . basename($ownerPath) . '.key.d' . $timestamp);
}
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$rootView->rename($keyfile . '.key', $user . '/files_trashbin/keyfiles/' . $filename . '.key.d' . $timestamp);
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}
}
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// 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));
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if ($owner !== $user) {
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self::copy_recursive($sharekeys, $owner . '/files_trashbin/share-keys/' . basename($ownerPath) . '.d' . $timestamp, $rootView);
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}
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$rootView->rename($sharekeys, $user . '/files_trashbin/share-keys/' . $filename . '.d' . $timestamp);
} else {
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// handle share-keys
$matches = \OCA\Encryption\Helper::findShareKeys($ownerPath, $sharekeys, $rootView);
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foreach ($matches as $src) {
// get source file parts
$pathinfo = pathinfo($src);
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// we only want to keep the users key so we can access the private key
$userShareKey = $filename . '.' . $user . '.shareKey';
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// if we found the share-key for the owner, we need to move it to files_trashbin
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if ($pathinfo['basename'] == $userShareKey) {
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// calculate size
$size += $rootView->filesize($sharekeys . '.' . $user . '.shareKey');
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// move file
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$rootView->rename($sharekeys . '.' . $user . '.shareKey', $user . '/files_trashbin/share-keys/' . $userShareKey . '.d' . $timestamp);
} elseif ($owner !== $user) {
$ownerShareKey = basename($ownerPath) . '.' . $owner . '.shareKey';
if ($pathinfo['basename'] == $ownerShareKey) {
$rootView->rename($sharekeys . '.' . $owner . '.shareKey', $owner . '/files_trashbin/share-keys/' . $ownerShareKey . '.d' . $timestamp);
}
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} else {
// don't keep other share-keys
unlink($src);
}
}
}
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// enable proxy
\OC_FileProxy::$enabled = $proxyStatus;
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}
return $size;
}
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/**
* restore files from trash bin
*
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* @param string $file path to the deleted file
* @param string $filename name of the file
* @param int $timestamp time when the file was deleted
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*
* @return bool
*/
public static function restore($file, $filename, $timestamp) {
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$user = \OCP\User::getUser();
$view = new \OC\Files\View('/' . $user);
$location = '';
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if ($timestamp) {
$location = self::getLocation($user, $filename, $timestamp);
if ($location === false) {
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\OC_Log::write('files_trashbin', 'trash bin database inconsistent!', \OC_Log::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 = '';
}
}
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}
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// 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 . '/' . $uniqueFilename);
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$mtime = $view->filemtime($source);
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// disable proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
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// restore file
$restoreResult = $view->rename($source, $target);
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// handle the restore result
if ($restoreResult) {
$fakeRoot = $view->getRoot();
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$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 . '/' . $uniqueFilename),
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'trashPath' => \OC\Files\Filesystem::normalizePath($file)));
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self::restoreVersions($view, $file, $filename, $uniqueFilename, $location, $timestamp);
self::restoreEncryptionKeys($view, $file, $filename, $uniqueFilename, $location, $timestamp);
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if ($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, $timestamp));
}
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// enable proxy
\OC_FileProxy::$enabled = $proxyStatus;
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return true;
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}
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// enable proxy
\OC_FileProxy::$enabled = $proxyStatus;
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return false;
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}
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/**
* restore versions from trash bin
*
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* @param \OC\Files\View $view file view
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* @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
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* @param string $location location if file
* @param int $timestamp deletion time
* @return bool
*/
private static function restoreVersions(\OC\Files\View $view, $file, $filename, $uniqueFilename, $location, $timestamp) {
if (\OCP\App::isEnabled('files_versions')) {
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// disable proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
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$user = \OCP\User::getUser();
$rootView = new \OC\Files\View('/');
$target = \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $uniqueFilename);
list($owner, $ownerPath) = self::getUidAndFilename($target);
// file has been deleted in between
if (empty($ownerPath)) {
\OC_FileProxy::$enabled = $proxyStatus;
return false;
}
if ($timestamp) {
$versionedFile = $filename;
} else {
$versionedFile = $file;
}
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if ($view->is_dir('/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, $timestamp)) {
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foreach ($versions as $v) {
if ($timestamp) {
$rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v . '.d' . $timestamp, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
} else {
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$rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
}
}
}
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// enable proxy
\OC_FileProxy::$enabled = $proxyStatus;
}
}
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/**
* restore encryption keys from trash bin
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*
* @param \OC\Files\View $view
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* @param string $file complete path to file
* @param string $filename name of file
* @param string $uniqueFilename new file name to restore the file without overwriting existing files
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* @param string $location location of file
* @param int $timestamp deletion time
* @return bool
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*/
private static function restoreEncryptionKeys(\OC\Files\View $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!)
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);
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// file has been deleted in between
if (empty($ownerPath)) {
return false;
}
$util = new \OCA\Encryption\Util(new \OC\Files\View('/'), $user);
if ($util->isSystemWideMountPoint($ownerPath)) {
$baseDir = '/files_encryption/';
} else {
$baseDir = $owner . '/files_encryption/';
}
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$path_parts = pathinfo($file);
$source_location = $path_parts['dirname'];
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if ($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 . '/' . $filename);
} else {
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$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)) {
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// handle keyfiles
$rootView->rename($keyfile, $baseDir . '/keyfiles/' . $ownerPath);
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// handle share-keys
if ($timestamp) {
$sharekey .= '.d' . $timestamp;
}
$rootView->rename($sharekey, $baseDir . '/share-keys/' . $ownerPath);
} else {
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// handle keyfiles
$rootView->rename($keyfile, $baseDir . '/keyfiles/' . $ownerPath . '.key');
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// handle share-keys
$ownerShareKey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $source_location . '/' . $filename . '.' . $user . '.shareKey');
if ($timestamp) {
$ownerShareKey .= '.d' . $timestamp;
}
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// move only owners key
$rootView->rename($ownerShareKey, $baseDir . '/share-keys/' . $ownerPath . '.' . $user . '.shareKey');
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// try to re-share if file is shared
$filesystemView = new \OC\Files\View('/');
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$session = new \OCA\Encryption\Session($filesystemView);
$util = new \OCA\Encryption\Util($filesystemView, $user);
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// fix the file size
$absolutePath = \OC\Files\Filesystem::normalizePath('/' . $owner . '/files/' . $ownerPath);
$util->fixFileSize($absolutePath);
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// get current sharing state
$sharingEnabled = \OCP\Share::isEnabled();
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// get users sharing this file
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$usersSharing = $util->getSharingUsersArray($sharingEnabled, $target);
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// Attempt to set shareKey
$util->setSharedFileKeyfiles($session, $usersSharing, $target);
}
}
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// enable proxy
\OC_FileProxy::$enabled = $proxyStatus;
}
}
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/**
* delete all files from the trash
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*/
public static function deleteAll() {
$user = \OCP\User::getUser();
$view = new \OC\Files\View('/' . $user);
$view->deleteAll('files_trashbin');
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=?');
$query->execute(array($user));
return true;
}
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/**
* delete file from trash bin permanently
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*
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* @param string $filename path to the file
* @param string $user
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* @param int $timestamp of deletion time
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*
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* @return int size of deleted files
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*/
public static function delete($filename, $user, $timestamp = null) {
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$view = new \OC\Files\View('/' . $user);
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$size = 0;
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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));
$file = $filename . '.d' . $timestamp;
} else {
$file = $filename;
}
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$size += self::deleteVersions($view, $file, $filename, $timestamp);
$size += self::deleteEncryptionKeys($view, $file, $filename, $timestamp);
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if ($view->is_dir('/files_trashbin/files/' . $file)) {
$size += self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin/files/' . $file));
} else {
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$size += $view->filesize('/files_trashbin/files/' . $file);
}
\OC_Hook::emit('\OCP\Trashbin', 'preDelete', array('path' => '/files_trashbin/files/' . $file));
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$view->unlink('/files_trashbin/files/' . $file);
\OC_Hook::emit('\OCP\Trashbin', 'delete', array('path' => '/files_trashbin/files/' . $file));
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return $size;
}
/**
* @param \OC\Files\View $view
* @param $file
* @param $filename
* @param $timestamp
* @return int
*/
private static function deleteVersions(\OC\Files\View $view, $file, $filename, $timestamp) {
$size = 0;
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if (\OCP\App::isEnabled('files_versions')) {
$user = \OCP\User::getUser();
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if ($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 $v) {
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if ($timestamp) {
$size += $view->filesize('/files_trashbin/versions/' . $filename . '.v' . $v . '.d' . $timestamp);
$view->unlink('/files_trashbin/versions/' . $filename . '.v' . $v . '.d' . $timestamp);
} else {
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$size += $view->filesize('/files_trashbin/versions/' . $filename . '.v' . $v);
$view->unlink('/files_trashbin/versions/' . $filename . '.v' . $v);
}
}
}
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}
return $size;
}
/**
* @param \OC\Files\View $view
* @param $file
* @param $filename
* @param $timestamp
* @return int
*/
private static function deleteEncryptionKeys(\OC\Files\View $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/' . $filename);
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$sharekeys = \OC\Files\Filesystem::normalizePath('files_trashbin/share-keys/' . $filename);
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} else {
$keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/' . $filename . '.key');
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$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);
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}
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}
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return $size;
}
/**
* check to see whether a file exists in trashbin
*
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* @param string $filename path to the file
* @param int $timestamp of deletion time
* @return bool true if file exists, otherwise false
*/
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public static function file_exists($filename, $timestamp = null) {
$user = \OCP\User::getUser();
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$view = new \OC\Files\View('/' . $user);
if ($timestamp) {
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$filename = $filename . '.d' . $timestamp;
} else {
$filename = $filename;
}
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$target = \OC\Files\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 $uid id of deleted user
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* @return bool result of db delete operation
*/
public static function deleteUser($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 $user
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* @return int available free space for trash bin
*/
private static function calculateFreeSpace($trashbinSize, $user) {
$softQuota = true;
$quota = \OC_Preferences::getValue($user, 'files', 'quota');
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$view = new \OC\Files\View('/' . $user);
if ($quota === null || $quota === 'default') {
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$quota = \OC::$server->getAppConfig()->getValue('files', 'default_quota');
}
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if ($quota === null || $quota === 'none') {
$quota = \OC\Files\Filesystem::free_space('/');
$softQuota = false;
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if ($quota === \OCP\Files\FileInfo::SPACE_UNKNOWN) {
$quota = 0;
}
} 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 = $view->getFileInfo('/files/', false);
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$free = $quota - $rootInfo['size']; // remaining free space for user
if ($free > 0) {
$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $trashbinSize; // how much space can be used for versions
} else {
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$availableSpace = $free - $trashbinSize;
}
} else {
$availableSpace = $quota;
}
return $availableSpace;
}
/**
* 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);
$freeSpace = self::calculateFreeSpace($size, $user);
if ($freeSpace < 0) {
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self::expire($size, $user);
}
}
/**
* clean up the trash bin
*
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* @param int $trashbinSize current size of the trash bin
* @param string $user
* @return int size of expired files
*/
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private static function expire($trashbinSize, $user) {
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// let the admin disable auto expire
$autoExpire = \OC_Config::getValue('trashbin_auto_expire', true);
if ($autoExpire === false) {
return 0;
}
$availableSpace = self::calculateFreeSpace($trashbinSize, $user);
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$size = 0;
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$retention_obligation = \OC_Config::getValue('trashbin_retention_obligation', self::DEFAULT_RETENTION_OBLIGATION);
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$limit = time() - ($retention_obligation * 86400);
$dirContent = Helper::getTrashFiles('/', $user, 'mtime');
// delete all files older then $retention_obligation
list($delSize, $count) = self::deleteExpiredFiles($dirContent, $user, $limit, $retention_obligation);
$size += $delSize;
$availableSpace += $size;
// delete files from trash until we meet the trash bin size limit again
$size += self::deleteFiles(array_slice($dirContent, $count), $user, $availableSpace);
return $size;
}
/**
* 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 $availableSpace available disc space
* @return int size of deleted files
*/
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protected static function deleteFiles($files, $user, $availableSpace) {
$size = 0;
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if ($availableSpace < 0) {
foreach ($files as $file) {
if ($availableSpace < 0) {
$tmp = self::delete($file['name'], $user, $file['mtime']);
\OC_Log::write('files_trashbin', 'remove "' . $file['name'] . '" (' . $tmp . 'B) to meet the limit of trash bin size (50% of available quota)', \OC_log::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
* @param int $limit files older then limit should be deleted
* @param int $retention_obligation max age of file in days
* @return array size of deleted files and number of deleted files
*/
protected static function deleteExpiredFiles($files, $user, $limit, $retention_obligation) {
$size = 0;
$count = 0;
foreach ($files as $file) {
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$timestamp = $file['mtime'];
$filename = $file['name'];
if ($timestamp <= $limit) {
$count++;
$size += self::delete($filename, $user, $timestamp);
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\OC_Log::write('files_trashbin', 'remove "' . $filename . '" from trash bin because it is older than ' . $retention_obligation, \OC_log::INFO);
} else {
break;
}
}
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return array($size, $count);
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}
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/**
* recursive copy to copy a whole directory
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*
* @param string $source source path, relative to the users files directory
* @param string $destination destination path relative to the users root directoy
* @param \OC\Files\View $view file view for the users root directory
* @return int
* @throws Exceptions\CopyRecursiveException
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*/
private static function copy_recursive($source, $destination, \OC\Files\View $view) {
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$size = 0;
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if ($view->is_dir($source)) {
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$view->mkdir($destination);
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$view->touch($destination, $view->filemtime($source));
foreach ($view->getDirectoryContent($source) as $i) {
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$pathDir = $source . '/' . $i['name'];
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if ($view->is_dir($pathDir)) {
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$size += self::copy_recursive($pathDir, $destination . '/' . $i['name'], $view);
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} else {
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$size += $view->filesize($pathDir);
$result = $view->copy($pathDir, $destination . '/' . $i['name']);
if (!$result) {
throw new \OCA\Files_Trashbin\Exceptions\CopyRecursiveException();
}
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$view->touch($destination . '/' . $i['name'], $view->filemtime($pathDir));
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}
}
} else {
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$size += $view->filesize($source);
$result = $view->copy($source, $destination);
if (!$result) {
throw new \OCA\Files_Trashbin\Exceptions\CopyRecursiveException();
}
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$view->touch($destination, $view->filemtime($source));
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}
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return $size;
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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 string $filename name of the file which should be restored
* @param int $timestamp timestamp when the file was deleted
* @return array
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*/
private static function getVersionsFromTrash($filename, $timestamp) {
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$view = new \OC\Files\View('/' . \OCP\User::getUser() . '/files_trashbin/versions');
$versions = array();
//force rescan of versions, local storage may not have updated the cache
/** @var \OC\Files\Storage\Storage $storage */
list($storage, ) = $view->resolvePath('/');
$storage->getScanner()->scan('files_trashbin');
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if ($timestamp) {
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// fetch for old versions
$matches = $view->searchRaw($filename . '.v%.d' . $timestamp);
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$offset = -strlen($timestamp) - 2;
} else {
$matches = $view->searchRaw($filename . '.v%');
}
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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));
}
}
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}
return $versions;
}
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/**
* find unique extension for restored file if a file with the same name already exists
*
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* @param string $location where the file should be restored
* @param string $filename name of the file
* @param \OC\Files\View $view filesystem view relative to users root directory
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* @return string with unique extension
*/
private static function getUniqueFilename($location, $filename, \OC\Files\View $view) {
$ext = pathinfo($filename, PATHINFO_EXTENSION);
$name = pathinfo($filename, PATHINFO_FILENAME);
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$l = \OC::$server->getL10N('files_trashbin');
// if extension is not empty we set a dot in front of it
if ($ext !== '') {
$ext = '.' . $ext;
}
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if ($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;
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}
return $filename;
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}
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/**
* get the size from a given root folder
* @param \OC\Files\View $view file view on the root folder
* @return integer size of the folder
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*/
private static function calculateSize($view) {
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$root = \OCP\Config::getSystemValue('datadirectory') . $view->getAbsolutePath('');
if (!file_exists($root)) {
return 0;
}
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$iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($root), \RecursiveIteratorIterator::CHILD_FIRST);
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$size = 0;
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/**
* 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 = $iterator->current();
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$relpath = substr($path, strlen($root) - 1);
if (!$view->is_dir($relpath)) {
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$size += $view->filesize($relpath);
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}
$iterator->next();
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}
return $size;
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}
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/**
* get current size of trash bin from a given user
*
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* @param string $user user who owns the trash bin
* @return integer trash bin size
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*/
private static function getTrashbinSize($user) {
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$view = new \OC\Files\View('/' . $user);
$fileInfo = $view->getFileInfo('/files_trashbin');
return isset($fileInfo['size']) ? $fileInfo['size'] : 0;
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}
/**
* 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");
}
/**
* check if trash bin is empty for a given user
* @param string $user
* @return bool
*/
public static function isEmpty($user) {
$view = new \OC\Files\View('/' . $user . '/files_trashbin');
if ($view->is_dir('/files') && $dh = $view->opendir('/files')) {
while ($file = readdir($dh)) {
if ($file !== '.' and $file !== '..') {
return false;
}
}
}
return true;
}
/**
* @param $path
* @return string
*/
public static function preview_icon($path) {
return \OC_Helper::linkToRoute('core_ajax_trashbin_preview', array('x' => 36, 'y' => 36, 'file' => $path));
}
}