319 lines
9.1 KiB
PHP
319 lines
9.1 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Björn Schießle <bjoern@schiessle.org>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\Files_Trashbin;
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use OC\Files\Filesystem;
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use OC\Files\Storage\Wrapper\Wrapper;
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use OC\Files\View;
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use OCA\Files_Trashbin\Events\MoveToTrashEvent;
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use OCP\Encryption\Exceptions\GenericEncryptionException;
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use OCP\Files\IRootFolder;
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use OCP\Files\Node;
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use OCP\ILogger;
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use OCP\IUserManager;
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use Symfony\Component\EventDispatcher\EventDispatcher;
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class Storage extends Wrapper {
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private $mountPoint;
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// remember already deleted files to avoid infinite loops if the trash bin
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// move files across storages
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private $deletedFiles = array();
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/**
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* Disable trash logic
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*
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* @var bool
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*/
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private static $disableTrash = false;
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/**
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* remember which file/folder was moved out of s shared folder
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* in this case we want to add a copy to the owners trash bin
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*
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* @var array
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*/
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private static $moveOutOfSharedFolder = [];
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/** @var IUserManager */
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private $userManager;
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/** @var ILogger */
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private $logger;
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/** @var EventDispatcher */
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private $eventDispatcher;
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/** @var IRootFolder */
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private $rootFolder;
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/**
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* Storage constructor.
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*
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* @param array $parameters
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* @param IUserManager|null $userManager
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* @param ILogger|null $logger
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* @param EventDispatcher|null $eventDispatcher
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* @param IRootFolder|null $rootFolder
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*/
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public function __construct($parameters,
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IUserManager $userManager = null,
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ILogger $logger = null,
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EventDispatcher $eventDispatcher = null,
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IRootFolder $rootFolder = null) {
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$this->mountPoint = $parameters['mountPoint'];
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$this->userManager = $userManager;
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$this->logger = $logger;
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$this->eventDispatcher = $eventDispatcher;
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$this->rootFolder = $rootFolder;
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parent::__construct($parameters);
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}
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/**
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* @internal
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*/
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public static function preRenameHook($params) {
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// in cross-storage cases, a rename is a copy + unlink,
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// that last unlink must not go to trash, only exception:
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// if the file was moved from a shared storage to a local folder,
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// in this case the owner should get a copy in his trash bin so that
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// they can restore the files again
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$oldPath = $params['oldpath'];
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$newPath = dirname($params['newpath']);
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$currentUser = \OC::$server->getUserSession()->getUser();
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$fileMovedOutOfSharedFolder = false;
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try {
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if ($currentUser) {
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$currentUserId = $currentUser->getUID();
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$view = new View($currentUserId . '/files');
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$fileInfo = $view->getFileInfo($oldPath);
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if ($fileInfo) {
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$sourceStorage = $fileInfo->getStorage();
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$sourceOwner = $view->getOwner($oldPath);
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$targetOwner = $view->getOwner($newPath);
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if ($sourceOwner !== $targetOwner
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&& $sourceStorage->instanceOfStorage('OCA\Files_Sharing\SharedStorage')
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) {
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$fileMovedOutOfSharedFolder = true;
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}
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}
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}
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} catch (\Exception $e) {
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// do nothing, in this case we just disable the trashbin and continue
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$logger = \OC::$server->getLogger();
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$logger->debug('Trashbin storage could not check if a file was moved out of a shared folder: ' . $e->getMessage());
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}
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if($fileMovedOutOfSharedFolder) {
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self::$moveOutOfSharedFolder['/' . $currentUserId . '/files' . $oldPath] = true;
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} else {
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self::$disableTrash = true;
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}
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}
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/**
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* @internal
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*/
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public static function postRenameHook($params) {
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self::$disableTrash = false;
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}
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/**
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* Rename path1 to path2 by calling the wrapped storage.
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*
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* @param string $path1 first path
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* @param string $path2 second path
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* @return bool
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*/
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public function rename($path1, $path2) {
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$result = $this->storage->rename($path1, $path2);
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if ($result === false) {
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// when rename failed, the post_rename hook isn't triggered,
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// but we still want to reenable the trash logic
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self::$disableTrash = false;
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}
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return $result;
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}
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/**
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* Deletes the given file by moving it into the trashbin.
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*
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* @param string $path path of file or folder to delete
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*
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* @return bool true if the operation succeeded, false otherwise
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*/
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public function unlink($path) {
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try {
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if (isset(self::$moveOutOfSharedFolder[$this->mountPoint . $path])) {
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$result = $this->doDelete($path, 'unlink', true);
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unset(self::$moveOutOfSharedFolder[$this->mountPoint . $path]);
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} else {
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$result = $this->doDelete($path, 'unlink');
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}
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} catch (GenericEncryptionException $e) {
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// in case of a encryption exception we delete the file right away
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$this->logger->info(
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"Can't move file" . $path .
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"to the trash bin, therefore it was deleted right away");
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$result = $this->storage->unlink($path);
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}
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return $result;
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}
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/**
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* Deletes the given folder by moving it into the trashbin.
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*
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* @param string $path path of folder to delete
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*
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* @return bool true if the operation succeeded, false otherwise
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*/
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public function rmdir($path) {
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if (isset(self::$moveOutOfSharedFolder[$this->mountPoint . $path])) {
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$result = $this->doDelete($path, 'rmdir', true);
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unset(self::$moveOutOfSharedFolder[$this->mountPoint . $path]);
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} else {
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$result = $this->doDelete($path, 'rmdir');
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}
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return $result;
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}
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/**
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* check if it is a file located in data/user/files only files in the
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* 'files' directory should be moved to the trash
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*
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* @param $path
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* @return bool
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*/
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protected function shouldMoveToTrash($path){
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// check if there is a app which want to disable the trash bin for this file
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$fileId = $this->storage->getCache()->getId($path);
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$nodes = $this->rootFolder->getById($fileId);
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foreach ($nodes as $node) {
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$event = $this->createMoveToTrashEvent($node);
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$this->eventDispatcher->dispatch('OCA\Files_Trashbin::moveToTrash', $event);
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if ($event->shouldMoveToTrashBin() === false) {
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return false;
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}
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}
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$normalized = Filesystem::normalizePath($this->mountPoint . '/' . $path);
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$parts = explode('/', $normalized);
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if (count($parts) < 4) {
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return false;
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}
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if ($this->userManager->userExists($parts[1]) && $parts[2] === 'files') {
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return true;
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}
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return false;
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}
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/**
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* get move to trash event
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*
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* @param Node $node
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* @return MoveToTrashEvent
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*/
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protected function createMoveToTrashEvent(Node $node) {
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$event = new MoveToTrashEvent($node);
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return $event;
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}
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/**
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* Run the delete operation with the given method
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*
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* @param string $path path of file or folder to delete
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* @param string $method either "unlink" or "rmdir"
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* @param bool $ownerOnly delete for owner only (if file gets moved out of a shared folder)
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*
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* @return bool true if the operation succeeded, false otherwise
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*/
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private function doDelete($path, $method, $ownerOnly = false) {
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if (self::$disableTrash
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|| !\OC_App::isEnabled('files_trashbin')
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|| (pathinfo($path, PATHINFO_EXTENSION) === 'part')
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|| $this->shouldMoveToTrash($path) === false
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) {
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return call_user_func_array([$this->storage, $method], [$path]);
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}
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// check permissions before we continue, this is especially important for
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// shared files
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if (!$this->isDeletable($path)) {
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return false;
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}
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$normalized = Filesystem::normalizePath($this->mountPoint . '/' . $path, true, false, true);
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$result = true;
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$view = Filesystem::getView();
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if (!isset($this->deletedFiles[$normalized]) && $view instanceof View) {
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$this->deletedFiles[$normalized] = $normalized;
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if ($filesPath = $view->getRelativePath($normalized)) {
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$filesPath = trim($filesPath, '/');
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$result = \OCA\Files_Trashbin\Trashbin::move2trash($filesPath, $ownerOnly);
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// in cross-storage cases the file will be copied
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// but not deleted, so we delete it here
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if ($result) {
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call_user_func_array([$this->storage, $method], [$path]);
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}
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} else {
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$result = call_user_func_array([$this->storage, $method], [$path]);
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}
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unset($this->deletedFiles[$normalized]);
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} else if ($this->storage->file_exists($path)) {
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$result = call_user_func_array([$this->storage, $method], [$path]);
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}
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return $result;
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}
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/**
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* Setup the storate wrapper callback
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*/
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public static function setupStorage() {
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\OC\Files\Filesystem::addStorageWrapper('oc_trashbin', function ($mountPoint, $storage) {
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return new \OCA\Files_Trashbin\Storage(
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array('storage' => $storage, 'mountPoint' => $mountPoint),
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\OC::$server->getUserManager(),
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\OC::$server->getLogger(),
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\OC::$server->getEventDispatcher(),
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\OC::$server->getLazyRootFolder()
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);
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}, 1);
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}
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}
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