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diff --git a/apps/files_external/lib/Lib/Backend/Swift.php b/apps/files_external/lib/Lib/Backend/Swift.php
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+++ b/apps/files_external/lib/Lib/Backend/Swift.php
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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 \OCP\IL10N;
+use \OCA\Files_External\Lib\Backend\Backend;
+use \OCA\Files_External\Lib\DefinitionParameter;
+use \OCA\Files_External\Lib\Auth\AuthMechanism;
+use \OCA\Files_External\Service\BackendService;
+use \OCA\Files_External\Lib\Auth\OpenStack\OpenStack;
+use \OCA\Files_External\Lib\Auth\OpenStack\Rackspace;
+use \OCA\Files_External\Lib\LegacyDependencyCheckPolyfill;
+
+class Swift extends Backend {
+
+	use LegacyDependencyCheckPolyfill;
+
+	public function __construct(IL10N $l, OpenStack $openstackAuth, Rackspace $rackspaceAuth) {
+		$this
+			->setIdentifier('swift')
+			->addIdentifierAlias('\OC\Files\Storage\Swift') // legacy compat
+			->setStorageClass('\OCA\Files_External\Lib\Storage\Swift')
+			->setText($l->t('OpenStack Object Storage'))
+			->addParameters([
+				(new DefinitionParameter('service_name', $l->t('Service name')))
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+				(new DefinitionParameter('region', $l->t('Region')))
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+				(new DefinitionParameter('bucket', $l->t('Bucket'))),
+				(new DefinitionParameter('timeout', $l->t('Request timeout (seconds)')))
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+			])
+			->addAuthScheme(AuthMechanism::SCHEME_OPENSTACK)
+			->setLegacyAuthMechanismCallback(function(array $params) use ($openstackAuth, $rackspaceAuth) {
+				if (isset($params['options']['key']) && $params['options']['key']) {
+					return $rackspaceAuth;
+				}
+				return $openstackAuth;
+			})
+		;
+	}
+
+}