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-rw-r--r--lib/private/files/storage/wrapper/permissionsmask.php131
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diff --git a/lib/private/files/storage/wrapper/permissionsmask.php b/lib/private/files/storage/wrapper/permissionsmask.php
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-<?php
-/**
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Robin McCorkell <robin@mccorkell.me.uk>
- *
- * @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/>
- *
- */
-
-namespace OC\Files\Storage\Wrapper;
-
-use OC\Files\Cache\Wrapper\CachePermissionsMask;
-use OCP\Constants;
-
-/**
- * Mask the permissions of a storage
- *
- * This can be used to restrict update, create, delete and/or share permissions of a storage
- *
- * Note that the read permissions cant be masked
- */
-class PermissionsMask extends Wrapper {
- /**
- * @var int the permissions bits we want to keep
- */
- private $mask;
-
- /**
- * @param array $arguments ['storage' => $storage, 'mask' => $mask]
- *
- * $storage: The storage the permissions mask should be applied on
- * $mask: The permission bits that should be kept, a combination of the \OCP\Constant::PERMISSION_ constants
- */
- public function __construct($arguments) {
- parent::__construct($arguments);
- $this->mask = $arguments['mask'];
- }
-
- private function checkMask($permissions) {
- return ($this->mask & $permissions) === $permissions;
- }
-
- public function isUpdatable($path) {
- return $this->checkMask(Constants::PERMISSION_UPDATE) and parent::isUpdatable($path);
- }
-
- public function isCreatable($path) {
- return $this->checkMask(Constants::PERMISSION_CREATE) and parent::isCreatable($path);
- }
-
- public function isDeletable($path) {
- return $this->checkMask(Constants::PERMISSION_DELETE) and parent::isDeletable($path);
- }
-
- public function isSharable($path) {
- return $this->checkMask(Constants::PERMISSION_SHARE) and parent::isSharable($path);
- }
-
- public function getPermissions($path) {
- return $this->storage->getPermissions($path) & $this->mask;
- }
-
- public function rename($path1, $path2) {
- return $this->checkMask(Constants::PERMISSION_UPDATE) and parent::rename($path1, $path2);
- }
-
- public function copy($path1, $path2) {
- return $this->checkMask(Constants::PERMISSION_CREATE) and parent::copy($path1, $path2);
- }
-
- public function touch($path, $mtime = null) {
- $permissions = $this->file_exists($path) ? Constants::PERMISSION_UPDATE : Constants::PERMISSION_CREATE;
- return $this->checkMask($permissions) and parent::touch($path, $mtime);
- }
-
- public function mkdir($path) {
- return $this->checkMask(Constants::PERMISSION_CREATE) and parent::mkdir($path);
- }
-
- public function rmdir($path) {
- return $this->checkMask(Constants::PERMISSION_DELETE) and parent::rmdir($path);
- }
-
- public function unlink($path) {
- return $this->checkMask(Constants::PERMISSION_DELETE) and parent::unlink($path);
- }
-
- public function file_put_contents($path, $data) {
- $permissions = $this->file_exists($path) ? Constants::PERMISSION_UPDATE : Constants::PERMISSION_CREATE;
- return $this->checkMask($permissions) and parent::file_put_contents($path, $data);
- }
-
- public function fopen($path, $mode) {
- if ($mode === 'r' or $mode === 'rb') {
- return parent::fopen($path, $mode);
- } else {
- $permissions = $this->file_exists($path) ? Constants::PERMISSION_UPDATE : Constants::PERMISSION_CREATE;
- return $this->checkMask($permissions) ? parent::fopen($path, $mode) : false;
- }
- }
-
- /**
- * get a cache instance for the storage
- *
- * @param string $path
- * @param \OC\Files\Storage\Storage (optional) the storage to pass to the cache
- * @return \OC\Files\Cache\Cache
- */
- public function getCache($path = '', $storage = null) {
- if (!$storage) {
- $storage = $this;
- }
- $sourceCache = parent::getCache($path, $storage);
- return new CachePermissionsMask($sourceCache, $this->mask);
- }
-}