124 lines
3.9 KiB
PHP
124 lines
3.9 KiB
PHP
<?php
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/**
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* @author Robin Appelman <icewind@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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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 OC\Files\Storage\Wrapper;
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use OC\Files\Cache\Wrapper\CachePermissionsMask;
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use OCP\Constants;
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/**
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* Mask the permissions of a storage
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*
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* This can be used to restrict update, create, delete and/or share permissions of a storage
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*
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* Note that the read permissions cant be masked
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*/
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class PermissionsMask extends Wrapper {
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/**
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* @var int the permissions bits we want to keep
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*/
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private $mask;
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/**
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* @param array $arguments ['storage' => $storage, 'mask' => $mask]
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*
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* $storage: The storage the permissions mask should be applied on
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* $mask: The permission bits that should be kept, a combination of the \OCP\Constant::PERMISSION_ constants
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*/
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public function __construct($arguments) {
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parent::__construct($arguments);
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$this->mask = $arguments['mask'];
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}
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private function checkMask($permissions) {
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return ($this->mask & $permissions) === $permissions;
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}
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public function isUpdatable($path) {
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return $this->checkMask(Constants::PERMISSION_UPDATE) and parent::isUpdatable($path);
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}
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public function isCreatable($path) {
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return $this->checkMask(Constants::PERMISSION_CREATE) and parent::isCreatable($path);
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}
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public function isDeletable($path) {
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return $this->checkMask(Constants::PERMISSION_DELETE) and parent::isDeletable($path);
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}
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public function getPermissions($path) {
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return $this->storage->getPermissions($path) & $this->mask;
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}
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public function rename($path1, $path2) {
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return $this->checkMask(Constants::PERMISSION_UPDATE) and parent::rename($path1, $path2);
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}
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public function copy($path1, $path2) {
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return $this->checkMask(Constants::PERMISSION_CREATE) and parent::copy($path1, $path2);
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}
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public function touch($path, $mtime = null) {
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$permissions = $this->file_exists($path) ? Constants::PERMISSION_UPDATE : Constants::PERMISSION_CREATE;
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return $this->checkMask($permissions) and parent::touch($path, $mtime);
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}
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public function mkdir($path) {
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return $this->checkMask(Constants::PERMISSION_CREATE) and parent::mkdir($path);
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}
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public function rmdir($path) {
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return $this->checkMask(Constants::PERMISSION_DELETE) and parent::rmdir($path);
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}
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public function unlink($path) {
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return $this->checkMask(Constants::PERMISSION_DELETE) and parent::unlink($path);
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}
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public function file_put_contents($path, $data) {
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$permissions = $this->file_exists($path) ? Constants::PERMISSION_UPDATE : Constants::PERMISSION_CREATE;
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return $this->checkMask($permissions) and parent::file_put_contents($path, $data);
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}
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public function fopen($path, $mode) {
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if ($mode === 'r' or $mode === 'rb') {
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return parent::fopen($path, $mode);
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} else {
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$permissions = $this->file_exists($path) ? Constants::PERMISSION_UPDATE : Constants::PERMISSION_CREATE;
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return $this->checkMask($permissions) ? parent::fopen($path, $mode) : false;
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}
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}
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/**
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* get a cache instance for the storage
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*
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* @param string $path
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* @param \OC\Files\Storage\Storage (optional) the storage to pass to the cache
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* @return \OC\Files\Cache\Cache
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*/
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public function getCache($path = '', $storage = null) {
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if (!$storage) {
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$storage = $this;
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}
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$sourceCache = parent::getCache($path, $storage);
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return new CachePermissionsMask($sourceCache, $this->mask);
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}
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}
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