1 files changed, 0 insertions, 808 deletions
diff --git a/apps/files_versions/lib/storage.php b/apps/files_versions/lib/storage.php
deleted file mode 100644
index a213ea75238..00000000000
--- a/apps/files_versions/lib/storage.php
+++ /dev/null
@@ -1,808 +0,0 @@
-<?php
-/**
- * @author Arthur Schiwon <blizzz@owncloud.com>
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Björn Schießle <schiessle@owncloud.com>
- * @author Felix Moeller <mail@felixmoeller.de>
- * @author Florin Peter <github@florin-peter.de>
- * @author Georg Ehrke <georg@owncloud.com>
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Lukas Reschke <lukas@owncloud.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Robin McCorkell <robin@mccorkell.me.uk>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Victor Dubiniuk <dubiniuk@owncloud.com>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @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/>
- *
- */
-
-/**
- * Versions
- *
- * A class to handle the versioning of files.
- */
-
-namespace OCA\Files_Versions;
-
-use OC\Files\Filesystem;
-use OC\Files\View;
-use OCA\Files_Versions\AppInfo\Application;
-use OCA\Files_Versions\Command\Expire;
-use OCP\Lock\ILockingProvider;
-use OCP\User;
-
-class Storage {
-
-	const DEFAULTENABLED=true;
-	const DEFAULTMAXSIZE=50; // unit: percentage; 50% of available disk space/quota
-	const VERSIONS_ROOT = 'files_versions/';
-
-	const DELETE_TRIGGER_MASTER_REMOVED = 0;
-	const DELETE_TRIGGER_RETENTION_CONSTRAINT = 1;
-	const DELETE_TRIGGER_QUOTA_EXCEEDED = 2;
-
-	// files for which we can remove the versions after the delete operation was successful
-	private static $deletedFiles = array();
-
-	private static $sourcePathAndUser = array();
-
-	private static $max_versions_per_interval = array(
-		//first 10sec, one version every 2sec
-		1 => array('intervalEndsAfter' => 10,      'step' => 2),
-		//next minute, one version every 10sec
-		2 => array('intervalEndsAfter' => 60,      'step' => 10),
-		//next hour, one version every minute
-		3 => array('intervalEndsAfter' => 3600,    'step' => 60),
-		//next 24h, one version every hour
-		4 => array('intervalEndsAfter' => 86400,   'step' => 3600),
-		//next 30days, one version per day
-		5 => array('intervalEndsAfter' => 2592000, 'step' => 86400),
-		//until the end one version per week
-		6 => array('intervalEndsAfter' => -1,      'step' => 604800),
-	);
-	
-	/** @var \OCA\Files_Versions\AppInfo\Application */
-	private static $application;
-
-	/**
-	 * 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 create the versions
-		if (!$userManager->userExists($uid)) {
-			$uid = User::getUser();
-		}
-		Filesystem::initMountPoints($uid);
-		if ( $uid != User::getUser() ) {
-			$info = Filesystem::getFileInfo($filename);
-			$ownerView = new View('/'.$uid.'/files');
-			try {
-				$filename = $ownerView->getPath($info['fileid']);
-				// make sure that the file name doesn't end with a trailing slash
-				// can for example happen single files shared across servers
-				$filename = rtrim($filename, '/');
-			} catch (NotFoundException $e) {
-				$filename = null;
-			}
-		}
-		return [$uid, $filename];
-	}
-
-	/**
-	 * Remember the owner and the owner path of the source file
-	 *
-	 * @param string $source source path
-	 */
-	public static function setSourcePathAndUser($source) {
-		list($uid, $path) = self::getUidAndFilename($source);
-		self::$sourcePathAndUser[$source] = array('uid' => $uid, 'path' => $path);
-	}
-
-	/**
-	 * Gets the owner and the owner path from the source path
-	 *
-	 * @param string $source source path
-	 * @return array with user id and path
-	 */
-	public static function getSourcePathAndUser($source) {
-
-		if (isset(self::$sourcePathAndUser[$source])) {
-			$uid = self::$sourcePathAndUser[$source]['uid'];
-			$path = self::$sourcePathAndUser[$source]['path'];
-			unset(self::$sourcePathAndUser[$source]);
-		} else {
-			$uid = $path = false;
-		}
-		return array($uid, $path);
-	}
-
-	/**
-	 * get current size of all versions from a given user
-	 *
-	 * @param string $user user who owns the versions
-	 * @return int versions size
-	 */
-	private static function getVersionsSize($user) {
-		$view = new View('/' . $user);
-		$fileInfo = $view->getFileInfo('/files_versions');
-		return isset($fileInfo['size']) ? $fileInfo['size'] : 0;
-	}
-
-	/**
-	 * store a new version of a file.
-	 */
-	public static function store($filename) {
-		if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
-
-			// if the file gets streamed we need to remove the .part extension
-			// to get the right target
-			$ext = pathinfo($filename, PATHINFO_EXTENSION);
-			if ($ext === 'part') {
-				$filename = substr($filename, 0, strlen($filename) - 5);
-			}
-
-			// we only handle existing files
-			if (! Filesystem::file_exists($filename) || Filesystem::is_dir($filename)) {
-				return false;
-			}
-
-			list($uid, $filename) = self::getUidAndFilename($filename);
-
-			$files_view = new View('/'.$uid .'/files');
-			$users_view = new View('/'.$uid);
-
-			// no use making versions for empty files
-			if ($files_view->filesize($filename) === 0) {
-				return false;
-			}
-
-			// create all parent folders
-			self::createMissingDirectories($filename, $users_view);
-
-			self::scheduleExpire($uid, $filename);
-
-			// store a new version of a file
-			$mtime = $users_view->filemtime('files/' . $filename);
-			$users_view->copy('files/' . $filename, 'files_versions/' . $filename . '.v' . $mtime);
-			// call getFileInfo to enforce a file cache entry for the new version
-			$users_view->getFileInfo('files_versions/' . $filename . '.v' . $mtime);
-		}
-	}
-
-
-	/**
-	 * mark file as deleted so that we can remove the versions if the file is gone
-	 * @param string $path
-	 */
-	public static function markDeletedFile($path) {
-		list($uid, $filename) = self::getUidAndFilename($path);
-		self::$deletedFiles[$path] = array(
-			'uid' => $uid,
-			'filename' => $filename);
-	}
-
-	/**
-	 * delete the version from the storage and cache
-	 *
-	 * @param View $view
-	 * @param string $path
-	 */
-	protected static function deleteVersion($view, $path) {
-		$view->unlink($path);
-		/**
-		 * @var \OC\Files\Storage\Storage $storage
-		 * @var string $internalPath
-		 */
-		list($storage, $internalPath) = $view->resolvePath($path);
-		$cache = $storage->getCache($internalPath);
-		$cache->remove($internalPath);
-	}
-
-	/**
-	 * Delete versions of a file
-	 */
-	public static function delete($path) {
-
-		$deletedFile = self::$deletedFiles[$path];
-		$uid = $deletedFile['uid'];
-		$filename = $deletedFile['filename'];
-
-		if (!Filesystem::file_exists($path)) {
-
-			$view = new View('/' . $uid . '/files_versions');
-
-			$versions = self::getVersions($uid, $filename);
-			if (!empty($versions)) {
-				foreach ($versions as $v) {
-					\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED));
-					self::deleteVersion($view, $filename . '.v' . $v['version']);
-					\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED));
-				}
-			}
-		}
-		unset(self::$deletedFiles[$path]);
-	}
-
-	/**
-	 * Rename or copy versions of a file of the given paths
-	 *
-	 * @param string $sourcePath source path of the file to move, relative to
-	 * the currently logged in user's "files" folder
-	 * @param string $targetPath target path of the file to move, relative to
-	 * the currently logged in user's "files" folder
-	 * @param string $operation can be 'copy' or 'rename'
-	 */
-	public static function renameOrCopy($sourcePath, $targetPath, $operation) {
-		list($sourceOwner, $sourcePath) = self::getSourcePathAndUser($sourcePath);
-
-		// it was a upload of a existing file if no old path exists
-		// in this case the pre-hook already called the store method and we can
-		// stop here
-		if ($sourcePath === false) {
-			return true;
-		}
-
-		list($targetOwner, $targetPath) = self::getUidAndFilename($targetPath);
-
-		$sourcePath = ltrim($sourcePath, '/');
-		$targetPath = ltrim($targetPath, '/');
-
-		$rootView = new View('');
-
-		// did we move a directory ?
-		if ($rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
-			// does the directory exists for versions too ?
-			if ($rootView->is_dir('/' . $sourceOwner . '/files_versions/' . $sourcePath)) {
-				// create missing dirs if necessary
-				self::createMissingDirectories($targetPath, new View('/'. $targetOwner));
-
-				// move the directory containing the versions
-				$rootView->$operation(
-					'/' . $sourceOwner . '/files_versions/' . $sourcePath,
-					'/' . $targetOwner . '/files_versions/' . $targetPath
-				);
-			}
-		} else if ($versions = Storage::getVersions($sourceOwner, '/' . $sourcePath)) {
-			// create missing dirs if necessary
-			self::createMissingDirectories($targetPath, new View('/'. $targetOwner));
-
-			foreach ($versions as $v) {
-				// move each version one by one to the target directory
-				$rootView->$operation(
-					'/' . $sourceOwner . '/files_versions/' . $sourcePath.'.v' . $v['version'],
-					'/' . $targetOwner . '/files_versions/' . $targetPath.'.v'.$v['version']
-				);
-			}
-		}
-
-		// if we moved versions directly for a file, schedule expiration check for that file
-		if (!$rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
-			self::scheduleExpire($targetOwner, $targetPath);
-		}
-
-	}
-
-	/**
-	 * Rollback to an old version of a file.
-	 *
-	 * @param string $file file name
-	 * @param int $revision revision timestamp
-	 */
-	public static function rollback($file, $revision) {
-
-		if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
-			// add expected leading slash
-			$file = '/' . ltrim($file, '/');
-			list($uid, $filename) = self::getUidAndFilename($file);
-			$users_view = new View('/'.$uid);
-			$files_view = new View('/'. User::getUser().'/files');
-			$versionCreated = false;
-
-			//first create a new version
-			$version = 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename);
-			if (!$users_view->file_exists($version)) {
-				$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
-				$versionCreated = true;
-			}
-
-			$fileToRestore =  'files_versions' . $filename . '.v' . $revision;
-
-			// Restore encrypted version of the old file for the newly restored file
-			// This has to happen manually here since the file is manually copied below
-			$oldVersion = $users_view->getFileInfo($fileToRestore)->getEncryptedVersion();
-			$newFileInfo = $files_view->getFileInfo($filename);
-			$cache = $newFileInfo->getStorage()->getCache();
-			$cache->update($newFileInfo->getId(), ['encrypted' => $oldVersion, 'encryptedVersion' => $oldVersion]);
-
-			// rollback
-			if (self::copyFileContents($users_view, $fileToRestore, 'files' . $filename)) {
-				$files_view->touch($file, $revision);
-				Storage::scheduleExpire($uid, $file);
-				\OC_Hook::emit('\OCP\Versions', 'rollback', array(
-					'path' => $filename,
-					'revision' => $revision,
-				));
-				return true;
-			} else if ($versionCreated) {
-				self::deleteVersion($users_view, $version);
-			}
-		}
-		return false;
-
-	}
-
-	/**
-	 * Stream copy file contents from $path1 to $path2
-	 *
-	 * @param View $view view to use for copying
-	 * @param string $path1 source file to copy
-	 * @param string $path2 target file
-	 *
-	 * @return bool true for success, false otherwise
-	 */
-	private static function copyFileContents($view, $path1, $path2) {
-		/** @var \OC\Files\Storage\Storage $storage1 */
-		list($storage1, $internalPath1) = $view->resolvePath($path1);
-		/** @var \OC\Files\Storage\Storage $storage2 */
-		list($storage2, $internalPath2) = $view->resolvePath($path2);
-
-		$view->lockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
-		$view->lockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
-
-		// TODO add a proper way of overwriting a file while maintaining file ids
-		if ($storage1->instanceOfStorage('\OC\Files\ObjectStore\ObjectStoreStorage') || $storage2->instanceOfStorage('\OC\Files\ObjectStore\ObjectStoreStorage')) {
-			$source = $storage1->fopen($internalPath1, 'r');
-			$target = $storage2->fopen($internalPath2, 'w');
-			list(, $result) = \OC_Helper::streamCopy($source, $target);
-			fclose($source);
-			fclose($target);
-
-			if ($result !== false) {
-				$storage1->unlink($internalPath1);
-			}
-		} else {
-			$result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
-		}
-
-		$view->unlockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
-		$view->unlockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
-
-		return ($result !== false);
-	}
-
-	/**
-	 * get a list of all available versions of a file in descending chronological order
-	 * @param string $uid user id from the owner of the file
-	 * @param string $filename file to find versions of, relative to the user files dir
-	 * @param string $userFullPath
-	 * @return array versions newest version first
-	 */
-	public static function getVersions($uid, $filename, $userFullPath = '') {
-		$versions = array();
-		if (empty($filename)) {
-			return $versions;
-		}
-		// fetch for old versions
-		$view = new View('/' . $uid . '/');
-
-		$pathinfo = pathinfo($filename);
-		$versionedFile = $pathinfo['basename'];
-
-		$dir = Filesystem::normalizePath(self::VERSIONS_ROOT . '/' . $pathinfo['dirname']);
-
-		$dirContent = false;
-		if ($view->is_dir($dir)) {
-			$dirContent = $view->opendir($dir);
-		}
-
-		if ($dirContent === false) {
-			return $versions;
-		}
-
-		if (is_resource($dirContent)) {
-			while (($entryName = readdir($dirContent)) !== false) {
-				if (!Filesystem::isIgnoredDir($entryName)) {
-					$pathparts = pathinfo($entryName);
-					$filename = $pathparts['filename'];
-					if ($filename === $versionedFile) {
-						$pathparts = pathinfo($entryName);
-						$timestamp = substr($pathparts['extension'], 1);
-						$filename = $pathparts['filename'];
-						$key = $timestamp . '#' . $filename;
-						$versions[$key]['version'] = $timestamp;
-						$versions[$key]['humanReadableTimestamp'] = self::getHumanReadableTimestamp($timestamp);
-						if (empty($userFullPath)) {
-							$versions[$key]['preview'] = '';
-						} else {
-							$versions[$key]['preview'] = \OCP\Util::linkToRoute('core_ajax_versions_preview', array('file' => $userFullPath, 'version' => $timestamp));
-						}
-						$versions[$key]['path'] = Filesystem::normalizePath($pathinfo['dirname'] . '/' . $filename);
-						$versions[$key]['name'] = $versionedFile;
-						$versions[$key]['size'] = $view->filesize($dir . '/' . $entryName);
-					}
-				}
-			}
-			closedir($dirContent);
-		}
-
-		// sort with newest version first
-		krsort($versions);
-
-		return $versions;
-	}
-
-	/**
-	 * Expire versions that older than max version retention time
-	 * @param string $uid
-	 */
-	public static function expireOlderThanMaxForUser($uid){
-		$expiration = self::getExpiration();
-		$threshold = $expiration->getMaxAgeAsTimestamp();
-		$versions = self::getAllVersions($uid);
-		if (!$threshold || !array_key_exists('all', $versions)) {
-			return;
-		}
-
-		$toDelete = [];
-		foreach (array_reverse($versions['all']) as $key => $version) {
-			if (intval($version['version'])<$threshold) {
-				$toDelete[$key] = $version;
-			} else {
-				//Versions are sorted by time - nothing mo to iterate.
-				break;
-			}
-		}
-
-		$view = new View('/' . $uid . '/files_versions');
-		if (!empty($toDelete)) {
-			foreach ($toDelete as $version) {
-				\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT));
-				self::deleteVersion($view, $version['path'] . '.v' . $version['version']);
-				\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT));
-			}
-		}
-	}
-
-	/**
-	 * translate a timestamp into a string like "5 days ago"
-	 * @param int $timestamp
-	 * @return string for example "5 days ago"
-	 */
-	private static function getHumanReadableTimestamp($timestamp) {
-
-		$diff = time() - $timestamp;
-
-		if ($diff < 60) { // first minute
-			return  $diff . " seconds ago";
-		} elseif ($diff < 3600) { //first hour
-			return round($diff / 60) . " minutes ago";
-		} elseif ($diff < 86400) { // first day
-			return round($diff / 3600) . " hours ago";
-		} elseif ($diff < 604800) { //first week
-			return round($diff / 86400) . " days ago";
-		} elseif ($diff < 2419200) { //first month
-			return round($diff / 604800) . " weeks ago";
-		} elseif ($diff < 29030400) { // first year
-			return round($diff / 2419200) . " months ago";
-		} else {
-			return round($diff / 29030400) . " years ago";
-		}
-
-	}
-
-	/**
-	 * returns all stored file versions from a given user
-	 * @param string $uid id of the user
-	 * @return array with contains two arrays 'all' which contains all versions sorted by age and 'by_file' which contains all versions sorted by filename
-	 */
-	private static function getAllVersions($uid) {
-		$view = new View('/' . $uid . '/');
-		$dirs = array(self::VERSIONS_ROOT);
-		$versions = array();
-
-		while (!empty($dirs)) {
-			$dir = array_pop($dirs);
-			$files = $view->getDirectoryContent($dir);
-
-			foreach ($files as $file) {
-				if ($file['type'] === 'dir') {
-					array_push($dirs, $file['path']);
-				} else {
-					$versionsBegin = strrpos($file['path'], '.v');
-					$relPathStart = strlen(self::VERSIONS_ROOT);
-					$version = substr($file['path'], $versionsBegin + 2);
-					$relpath = substr($file['path'], $relPathStart, $versionsBegin - $relPathStart);
-					$key = $version . '#' . $relpath;
-					$versions[$key] = array('path' => $relpath, 'timestamp' => $version);
-				}
-			}
-		}
-
-		// newest version first
-		krsort($versions);
-
-		$result = array();
-
-		foreach ($versions as $key => $value) {
-			$size = $view->filesize(self::VERSIONS_ROOT.'/'.$value['path'].'.v'.$value['timestamp']);
-			$filename = $value['path'];
-
-			$result['all'][$key]['version'] = $value['timestamp'];
-			$result['all'][$key]['path'] = $filename;
-			$result['all'][$key]['size'] = $size;
-
-			$result['by_file'][$filename][$key]['version'] = $value['timestamp'];
-			$result['by_file'][$filename][$key]['path'] = $filename;
-			$result['by_file'][$filename][$key]['size'] = $size;
-		}
-
-		return $result;
-	}
-
-	/**
-	 * get list of files we want to expire
-	 * @param array $versions list of versions
-	 * @param integer $time
-	 * @param bool $quotaExceeded is versions storage limit reached
-	 * @return array containing the list of to deleted versions and the size of them
-	 */
-	protected static function getExpireList($time, $versions, $quotaExceeded = false) {
-		$expiration = self::getExpiration();
-
-		if ($expiration->shouldAutoExpire()) {
-			list($toDelete, $size) = self::getAutoExpireList($time, $versions);
-		} else {
-			$size = 0;
-			$toDelete = [];  // versions we want to delete
-		}
-
-		foreach ($versions as $key => $version) {
-			if ($expiration->isExpired($version['version'], $quotaExceeded) && !isset($toDelete[$key])) {
-				$size += $version['size'];
-				$toDelete[$key] = $version['path'] . '.v' . $version['version'];
-			}
-		}
-
-		return [$toDelete, $size];
-	}
-
-	/**
-	 * get list of files we want to expire
-	 * @param array $versions list of versions
-	 * @param integer $time
-	 * @return array containing the list of to deleted versions and the size of them
-	 */
-	protected static function getAutoExpireList($time, $versions) {
-		$size = 0;
-		$toDelete = array();  // versions we want to delete
-
-		$interval = 1;
-		$step = Storage::$max_versions_per_interval[$interval]['step'];
-		if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] == -1) {
-			$nextInterval = -1;
-		} else {
-			$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
-		}
-
-		$firstVersion = reset($versions);
-		$firstKey = key($versions);
-		$prevTimestamp = $firstVersion['version'];
-		$nextVersion = $firstVersion['version'] - $step;
-		unset($versions[$firstKey]);
-
-		foreach ($versions as $key => $version) {
-			$newInterval = true;
-			while ($newInterval) {
-				if ($nextInterval == -1 || $prevTimestamp > $nextInterval) {
-					if ($version['version'] > $nextVersion) {
-						//distance between two version too small, mark to delete
-						$toDelete[$key] = $version['path'] . '.v' . $version['version'];
-						$size += $version['size'];
-						\OCP\Util::writeLog('files_versions', 'Mark to expire '. $version['path'] .' next version should be ' . $nextVersion . " or smaller. (prevTimestamp: " . $prevTimestamp . "; step: " . $step, \OCP\Util::DEBUG);
-					} else {
-						$nextVersion = $version['version'] - $step;
-						$prevTimestamp = $version['version'];
-					}
-					$newInterval = false; // version checked so we can move to the next one
-				} else { // time to move on to the next interval
-					$interval++;
-					$step = Storage::$max_versions_per_interval[$interval]['step'];
-					$nextVersion = $prevTimestamp - $step;
-					if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] == -1) {
-						$nextInterval = -1;
-					} else {
-						$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
-					}
-					$newInterval = true; // we changed the interval -> check same version with new interval
-				}
-			}
-		}
-
-		return array($toDelete, $size);
-	}
-
-	/**
-	 * Schedule versions expiration for the given file
-	 *
-	 * @param string $uid owner of the file
-	 * @param string $fileName file/folder for which to schedule expiration
-	 */
-	private static function scheduleExpire($uid, $fileName) {
-		// let the admin disable auto expire
-		$expiration = self::getExpiration();
-		if ($expiration->isEnabled()) {
-			$command = new Expire($uid, $fileName);
-			\OC::$server->getCommandBus()->push($command);
-		}
-	}
-
-	/**
-	 * Expire versions which exceed the quota
-	 *
-	 * @param string $filename
-	 * @return bool|int|null
-	 */
-	public static function expire($filename) {
-		$config = \OC::$server->getConfig();
-		$expiration = self::getExpiration();
-		
-		if($config->getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true' && $expiration->isEnabled()) {
-
-			if (!Filesystem::file_exists($filename)) {
-				return false;
-			}
-
-			list($uid, $filename) = self::getUidAndFilename($filename);
-			if (empty($filename)) {
-				// file maybe renamed or deleted
-				return false;
-			}
-			$versionsFileview = new View('/'.$uid.'/files_versions');
-
-			// get available disk space for user
-			$user = \OC::$server->getUserManager()->get($uid);
-			$softQuota = true;
-			$quota = $user->getQuota();
-			if ( $quota === null || $quota === 'none' ) {
-				$quota = Filesystem::free_space('/');
-				$softQuota = false;
-			} else {
-				$quota = \OCP\Util::computerFileSize($quota);
-			}
-
-			// make sure that we have the current size of the version history
-			$versionsSize = self::getVersionsSize($uid);
-
-			// calculate available space for version history
-			// subtract size of files and current versions size from quota
-			if ($quota >= 0) {
-				if ($softQuota) {
-					$files_view = new View('/' . $uid . '/files');
-					$rootInfo = $files_view->getFileInfo('/', false);
-					$free = $quota - $rootInfo['size']; // remaining free space for user
-					if ($free > 0) {
-						$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
-					} else {
-						$availableSpace = $free - $versionsSize;
-					}
-				} else {
-					$availableSpace = $quota;
-				}
-			} else {
-				$availableSpace = PHP_INT_MAX;
-			}
-
-			$allVersions = Storage::getVersions($uid, $filename);
-
-			$time = time();
-			list($toDelete, $sizeOfDeletedVersions) = self::getExpireList($time, $allVersions, $availableSpace <= 0);
-
-			$availableSpace = $availableSpace + $sizeOfDeletedVersions;
-			$versionsSize = $versionsSize - $sizeOfDeletedVersions;
-
-			// if still not enough free space we rearrange the versions from all files
-			if ($availableSpace <= 0) {
-				$result = Storage::getAllVersions($uid);
-				$allVersions = $result['all'];
-
-				foreach ($result['by_file'] as $versions) {
-					list($toDeleteNew, $size) = self::getExpireList($time, $versions, $availableSpace <= 0);
-					$toDelete = array_merge($toDelete, $toDeleteNew);
-					$sizeOfDeletedVersions += $size;
-				}
-				$availableSpace = $availableSpace + $sizeOfDeletedVersions;
-				$versionsSize = $versionsSize - $sizeOfDeletedVersions;
-			}
-
-			foreach($toDelete as $key => $path) {
-				\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
-				self::deleteVersion($versionsFileview, $path);
-				\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
-				unset($allVersions[$key]); // update array with the versions we keep
-				\OCP\Util::writeLog('files_versions', "Expire: " . $path, \OCP\Util::DEBUG);
-			}
-
-			// Check if enough space is available after versions are rearranged.
-			// If not we delete the oldest versions until we meet the size limit for versions,
-			// but always keep the two latest versions
-			$numOfVersions = count($allVersions) -2 ;
-			$i = 0;
-			// sort oldest first and make sure that we start at the first element
-			ksort($allVersions);
-			reset($allVersions);
-			while ($availableSpace < 0 && $i < $numOfVersions) {
-				$version = current($allVersions);
-				\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
-				self::deleteVersion($versionsFileview, $version['path'] . '.v' . $version['version']);
-				\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
-				\OCP\Util::writeLog('files_versions', 'running out of space! Delete oldest version: ' . $version['path'].'.v'.$version['version'] , \OCP\Util::DEBUG);
-				$versionsSize -= $version['size'];
-				$availableSpace += $version['size'];
-				next($allVersions);
-				$i++;
-			}
-
-			return $versionsSize; // finally return the new size of the version history
-		}
-
-		return false;
-	}
-
-	/**
-	 * Create recursively missing directories inside of files_versions
-	 * that match the given path to a file.
-	 *
-	 * @param string $filename $path to a file, relative to the user's
-	 * "files" folder
-	 * @param View $view view on data/user/
-	 */
-	private static function createMissingDirectories($filename, $view) {
-		$dirname = Filesystem::normalizePath(dirname($filename));
-		$dirParts = explode('/', $dirname);
-		$dir = "/files_versions";
-		foreach ($dirParts as $part) {
-			$dir = $dir . '/' . $part;
-			if (!$view->file_exists($dir)) {
-				$view->mkdir($dir);
-			}
-		}
-	}
-
-	/**
-	 * Static workaround
-	 * @return Expiration
-	 */
-	protected static function getExpiration(){
-		if (is_null(self::$application)) {
-			self::$application = new Application();
-		}
-		return self::$application->getContainer()->query('Expiration');
-	}
-
-}