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<?php
/**
* @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 OCA\Files_External\Lib\Backend;
use \OCA\Files_External\Lib\StorageConfig;
use \OCA\Files_External\Lib\VisibilityTrait;
use \OCA\Files_External\Lib\FrontendDefinitionTrait;
use \OCA\Files_External\Lib\PriorityTrait;
use \OCA\Files_External\Lib\DependencyTrait;
use \OCA\Files_External\Lib\StorageModifierTrait;
use \OCA\Files_External\Lib\IdentifierTrait;
use \OCA\Files_External\Lib\Auth\AuthMechanism;
/**
* Storage backend
*
* A backend can have services injected during construction,
* such as \OCP\IDB for database operations. This allows a backend
* to perform advanced operations based on provided information.
*
* An authenication scheme defines the parameter interface, common to the
* storage implementation, the backend and the authentication mechanism.
* A storage implementation expects parameters according to the authentication
* scheme, which are provided from the authentication mechanism.
*
* This class uses the following traits:
* - VisibilityTrait
* Restrict usage to admin-only/none
* - FrontendDefinitionTrait
* Specify configuration parameters and other definitions
* - PriorityTrait
* Allow objects to prioritize over others with the same mountpoint
* - DependencyTrait
* The object requires certain dependencies to be met
* - StorageModifierTrait
* Object can affect storage mounting
*/
class Backend implements \JsonSerializable {
use VisibilityTrait;
use FrontendDefinitionTrait;
use PriorityTrait;
use DependencyTrait;
use StorageModifierTrait;
use IdentifierTrait;
/** @var string storage class */
private $storageClass;
/** @var array 'scheme' => true, supported authentication schemes */
private $authSchemes = [];
/** @var AuthMechanism|callable authentication mechanism fallback */
private $legacyAuthMechanism;
/**
* @return string
*/
public function getStorageClass() {
return $this->storageClass;
}
/**
* @param string $class
* @return self
*/
public function setStorageClass($class) {
$this->storageClass = $class;
return $this;
}
/**
* @return array
*/
public function getAuthSchemes() {
if (empty($this->authSchemes)) {
return [AuthMechanism::SCHEME_NULL => true];
}
return $this->authSchemes;
}
/**
* @param string $scheme
* @return self
*/
public function addAuthScheme($scheme) {
$this->authSchemes[$scheme] = true;
return $this;
}
/**
* @param array $parameters storage parameters, for dynamic mechanism selection
* @return AuthMechanism
*/
public function getLegacyAuthMechanism(array $parameters = []) {
if (is_callable($this->legacyAuthMechanism)) {
return call_user_func($this->legacyAuthMechanism, $parameters);
}
return $this->legacyAuthMechanism;
}
/**
* @param AuthMechanism $authMechanism
* @return self
*/
public function setLegacyAuthMechanism(AuthMechanism $authMechanism) {
$this->legacyAuthMechanism = $authMechanism;
return $this;
}
/**
* @param callable $callback dynamic auth mechanism selection
* @return self
*/
public function setLegacyAuthMechanismCallback(callable $callback) {
$this->legacyAuthMechanism = $callback;
}
/**
* Serialize into JSON for client-side JS
*
* @return array
*/
public function jsonSerialize() {
$data = $this->jsonSerializeDefinition();
$data += $this->jsonSerializeIdentifier();
$data['backend'] = $data['name']; // legacy compat
$data['priority'] = $this->getPriority();
$data['authSchemes'] = $this->getAuthSchemes();
return $data;
}
/**
* Check if parameters are satisfied in a StorageConfig
*
* @param StorageConfig $storage
* @return bool
*/
public function validateStorage(StorageConfig $storage) {
return $this->validateStorageDefinition($storage);
}
}
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