Add background job to refresh federated discovery

Once a day refresh the information automatically in cron

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

apps/files_sharing/appinfo/info.xml

@@ -9,7 +9,7 @@
 Turning the feature off removes shared files and folders on the server for all share recipients, and also on the sync clients and mobile apps. More information is available in the Nextcloud Documentation.
 
 	</description>
-	<version>1.6.0</version>
+	<version>1.6.1</version>
 	<licence>agpl</licence>
 	<author>Michael Gapczynski</author>
 	<author>Bjoern Schiessle</author>
@@ -29,6 +29,7 @@ Turning the feature off removes shared files and folders on the server for all s
 	<background-jobs>
 		<job>OCA\Files_Sharing\DeleteOrphanedSharesJob</job>
 		<job>OCA\Files_Sharing\ExpireSharesJob</job>
+		<job>OCA\Files_Sharing\BackgroundJob\FederatedSharesDiscoverJob</job>
 	</background-jobs>
 
 	<repair-steps>

apps/files_sharing/composer/composer/autoload_classmap.php

@@ -17,6 +17,7 @@ return array(
     'OCA\\Files_Sharing\\Activity\\Settings\\RemoteShare' => $baseDir . '/../lib/Activity/Settings/RemoteShare.php',
     'OCA\\Files_Sharing\\Activity\\Settings\\Shared' => $baseDir . '/../lib/Activity/Settings/Shared.php',
     'OCA\\Files_Sharing\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
+    'OCA\\Files_Sharing\\BackgroundJob\\FederatedSharesDiscoverJob' => $baseDir . '/../lib/BackgroundJob/FederatedSharesDiscoverJob.php',
     'OCA\\Files_Sharing\\Cache' => $baseDir . '/../lib/Cache.php',
     'OCA\\Files_Sharing\\Capabilities' => $baseDir . '/../lib/Capabilities.php',
     'OCA\\Files_Sharing\\Collaboration\\ShareRecipientSorter' => $baseDir . '/../lib/Collaboration/ShareRecipientSorter.php',

apps/files_sharing/composer/composer/autoload_static.php

@@ -32,6 +32,7 @@ class ComposerStaticInitFiles_Sharing
         'OCA\\Files_Sharing\\Activity\\Settings\\RemoteShare' => __DIR__ . '/..' . '/../lib/Activity/Settings/RemoteShare.php',
         'OCA\\Files_Sharing\\Activity\\Settings\\Shared' => __DIR__ . '/..' . '/../lib/Activity/Settings/Shared.php',
         'OCA\\Files_Sharing\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
+        'OCA\\Files_Sharing\\BackgroundJob\\FederatedSharesDiscoverJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/FederatedSharesDiscoverJob.php',
         'OCA\\Files_Sharing\\Cache' => __DIR__ . '/..' . '/../lib/Cache.php',
         'OCA\\Files_Sharing\\Capabilities' => __DIR__ . '/..' . '/../lib/Capabilities.php',
         'OCA\\Files_Sharing\\Collaboration\\ShareRecipientSorter' => __DIR__ . '/..' . '/../lib/Collaboration/ShareRecipientSorter.php',

apps/files_sharing/lib/BackgroundJob/FederatedSharesDiscoverJob.php

@@ -0,0 +1,56 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\Files_Sharing\BackgroundJob;
+
+use OC\BackgroundJob\TimedJob;
+use OCP\IDBConnection;
+use OCP\OCS\IDiscoveryService;
+
+class FederatedSharesDiscoverJob extends TimedJob {
+	/** @var IDBConnection */
+	private $connection;
+	/** @var IDiscoveryService */
+	private $discoveryService;
+
+	public function __construct(IDBConnection $connection,
+								IDiscoveryService $discoveryService) {
+		$this->connection = $connection;
+		$this->discoveryService = $discoveryService;
+
+		$this->setInterval(86400);
+	}
+
+	public function run($argument) {
+		$qb = $this->connection->getQueryBuilder();
+
+		$qb->selectDistinct('remote')
+			->from('share_external');
+
+		$result = $qb->execute();
+		while($row = $result->fetch()) {
+			$this->discoveryService->discover($row['remote'], 'FEDERATED_SHARING', true);
+		}
+		$result->closeCursor();
+	}
+}