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Diffstat (limited to 'apps/files_external/lib/Lib/Backend/Backend.php')
| -rw-r--r-- | apps/files_external/lib/Lib/Backend/Backend.php | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/apps/files_external/lib/Lib/Backend/Backend.php b/apps/files_external/lib/Lib/Backend/Backend.php new file mode 100644 index 00000000000..8fb84b0e835 --- /dev/null +++ b/apps/files_external/lib/Lib/Backend/Backend.php @@ -0,0 +1,165 @@ +<?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); + } + +} + |