server/apps/files_external/lib/permissionstrait.php
Robin McCorkell cc88c5f4b8 Implement more fine-grained external storage permissions model
VisibilityTrait -> PermissionsTrait

PermissionsTrait stores two sets of data, $permissions and
$allowedPermissions (analogous to $visibility and $allowedVisibility of
VisibilityTrait). Each set is a map of user type ('admin' or 'personal')
to permissions (mounting permission, create permission).

The result is that a backend can now be restricted for creation, while
still allowing it to be mounted. This is useful for deprecating backends
or auth mechanisms, preventing new storages being created, while still
allowing existing storages to be mounted.
2015-08-28 17:21:58 +01:00

164 lines
4.1 KiB
PHP

<?php
/**
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
*
* @copyright Copyright (c) 2015, 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 OCA\Files_External\Lib;
use \OCA\Files_External\Service\BackendService;
/**
* Trait to implement backend and auth mechanism permissions
*
* For user type constants, see BackendService::USER_*
* For permission constants, see BackendService::PERMISSION_*
*/
trait PermissionsTrait {
/** @var array [user type => permissions] */
protected $permissions = [
BackendService::USER_PERSONAL => BackendService::PERMISSION_DEFAULT,
BackendService::USER_ADMIN => BackendService::PERMISSION_DEFAULT,
];
/** @var array [user type => allowed permissions] */
protected $allowedPermissions = [
BackendService::USER_PERSONAL => BackendService::PERMISSION_DEFAULT,
BackendService::USER_ADMIN => BackendService::PERMISSION_DEFAULT,
];
/**
* @param string $userType
* @return int
*/
public function getPermissions($userType) {
if (isset($this->permissions[$userType])) {
return $this->permissions[$userType];
}
return BackendService::PERMISSION_NONE;
}
/**
* Check if the user type has permission
*
* @param string $userType
* @param int $permission
* @return bool
*/
public function isPermitted($userType, $permission) {
if ($this->getPermissions($userType) & $permission) {
return true;
}
return false;
}
/**
* @param string $userType
* @param int $permissions
* @return self
*/
public function setPermissions($userType, $permissions) {
$this->permissions[$userType] = $permissions;
$this->allowedPermissions[$userType] =
$this->getAllowedPermissions($userType) | $permissions;
return $this;
}
/**
* @param string $userType
* @param int $permission
* @return self
*/
public function addPermission($userType, $permission) {
return $this->setPermissions($userType,
$this->getPermissions($userType) | $permission
);
}
/**
* @param string $userType
* @param int $permission
* @return self
*/
public function removePermission($userType, $permission) {
return $this->setPermissions($userType,
$this->getPermissions($userType) & ~$permission
);
}
/**
* @param string $userType
* @return int
*/
public function getAllowedPermissions($userType) {
if (isset($this->allowedPermissions[$userType])) {
return $this->allowedPermissions[$userType];
}
return BackendService::PERMISSION_NONE;
}
/**
* Check if the user type has an allowed permission
*
* @param string $userType
* @param int $permission
* @return bool
*/
public function isAllowedPermitted($userType, $permission) {
if ($this->getAllowedPermissions($userType) & $permission) {
return true;
}
return false;
}
/**
* @param string $userType
* @param int $permissions
* @return self
*/
public function setAllowedPermissions($userType, $permissions) {
$this->allowedPermissions[$userType] = $permissions;
$this->permissions[$userType] =
$this->getPermissions($userType) & $permissions;
return $this;
}
/**
* @param string $userType
* @param int $permission
* @return self
*/
public function addAllowedPermission($userType, $permission) {
return $this->setAllowedPermissions($userType,
$this->getAllowedPermissions($userType) | $permission
);
}
/**
* @param string $userType
* @param int $permission
* @return self
*/
public function removeAllowedPermission($userType, $permission) {
return $this->setAllowedPermissions($userType,
$this->getAllowedPermissions($userType) & ~$permission
);
}
}