Add expiration for versions older than max

apps/files_versions/appinfo/app.php

@@ -19,6 +19,12 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  *
  */
-OCP\Util::addStyle('files_versions', 'versions');
+
+namespace OCA\Files_Versions\AppInfo;
+
+$app = new Application();
+$container = $app->getContainer();
+
+\OCP\Util::addStyle('files_versions', 'versions');
 
 \OCA\Files_Versions\Hooks::connectHooks();

apps/files_versions/appinfo/install.php

@@ -0,0 +1,23 @@
+<?php
+/**
+ * @author Victor Dubiniuk <dubiniuk@owncloud.com>
+ *
+ * @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/>
+ *
+ */
+ 
+// Cron job for deleting expired trash items
+\OC::$server->getJobList()->add('OCA\Files_Versions\BackgroundJob\ExpireVersions');

apps/files_versions/appinfo/update.php

@@ -24,3 +24,6 @@ $installedVersion=OCP\Config::getAppValue('files_versions', 'installed_version')
 if (version_compare($installedVersion, '1.0.4', '<')) {
 	\OC_DB::dropTable("files_versions");
 }
+
+// Cron job for deleting expired trash items
+\OC::$server->getJobList()->add('OCA\Files_Versions\BackgroundJob\ExpireVersions');

apps/files_versions/lib/backgroundjob/expireversions.php

@@ -0,0 +1,106 @@
+<?php
+/**
+ * @author Victor Dubiniuk <dubiniuk@owncloud.com>
+ *
+ * @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_Versions\BackgroundJob;
+
+use OCP\IDBConnection;
+use OCP\IUserManager;
+use OCA\Files_Versions\AppInfo\Application;
+use OCA\Files_Versions\Storage;
+use OCA\Files_Versions\Expiration;
+
+class ExpireVersions extends \OC\BackgroundJob\TimedJob {
+
+	const ITEMS_PER_SESSION = 1000;
+
+	/**
+	 * @var Expiration
+	 */
+	private $expiration;
+
+	/**
+	 * @var IDBConnection
+	 */
+	private $dbConnection;
+	
+	/**
+	 * @var IUserManager
+	 */
+	private $userManager;
+
+	public function __construct(IDBConnection $dbConnection = null, IUserManager $userManager = null, Expiration $expiration = null) {
+		// Run once per 30 minutes
+		$this->setInterval(60 * 30);
+
+		if (is_null($expiration) || is_null($userManager) || is_null($dbConnection)) {
+			$this->fixDIForJobs();
+		} else {
+			$this->dbConnection = $dbConnection;
+			$this->expiration = $expiration;
+			$this->userManager = $userManager;
+		}
+	}
+
+	protected function fixDIForJobs() {
+		$application = new Application();
+		$this->dbConnection = \OC::$server->getDatabaseConnection();
+		$this->expiration = $application->getContainer()->query('Expiration');
+		$this->userManager = \OC::$server->getUserManager();
+	}
+
+	protected function run($argument) {
+		$maxAge = $this->expiration->getMaxAgeAsTimestamp();
+		if (!$maxAge) {
+			return;
+		}
+
+		$users = $this->userManager->search('');
+		$isFSready = false;
+		foreach ($users as $user) {
+			$uid = $user->getUID();
+			if (!$isFSready) {
+				if (!$this->setupFS($uid)) {
+					continue;
+				}
+				$isFSready = true;
+			}
+			Storage::expireOlderThan($uid);
+		}
+
+		\OC_Util::tearDownFS();
+	}
+
+	/**
+	 * Act on behalf on trash item owner
+	 * @param string $user
+	 * @return boolean
+	 */
+	private function setupFS($user){
+		if (!$this->userManager->userExists($user)) {
+			return false;
+		}
+
+		\OC_Util::tearDownFS();
+		\OC_Util::setupFS($user);
+
+		return true;
+	}
+}

apps/files_versions/lib/expiration.php

@@ -112,6 +112,19 @@ class Expiration {
 		return $isOlderThanMax || $isMinReached;
 	}
 
+	/**
+	 * Get maximal retention obligation as a timestamp
+	 * @return int
+	 */
+	public function getMaxAgeAsTimestamp(){
+		$maxAge = false;
+		if ($this->isEnabled() && $this->maxAge !== self::NO_OBLIGATION) {
+			$time = $this->timeFactory->getTime();
+			$maxAge = $time - ($this->maxAge * 86400);
+		}
+		return $maxAge;
+	}
+
 	/**
 	* Read versions_retention_obligation, validate it 
 	* and set private members accordingly

apps/files_versions/lib/storage.php

@@ -403,6 +403,34 @@ class Storage {
 		return $versions;
 	}
 
+	public static function expireOlderThan($uid){
+		$expiration = self::getExpiration();
+		$threshold = $expiration->getMaxAgeAsTimestamp();
+		$versions = self::getAllVersions($uid);
+		if (!$threshold || !array_key_exists('all', $versions)) {
+			return;
+		}
+
+		$toDelete = [];
+		foreach (array_reverse($versions['all']) as $key => $version) {
+			if (intval($version['version'])<$threshold) {
+				$toDelete[$key] = $version;
+			} else {
+				//Versions are sorted by time - nothing mo to iterate.
+				break;
+			}
+		}
+
+		$view = new \OC\Files\View('/' . $uid . '/files_versions');
+		if (!empty($toDelete)) {
+			foreach ($toDelete as $version) {
+				\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $version['path'].'.v'.$version['version']));
+				self::deleteVersion($view, $version['path'] . '.v' . $version['version']);
+				\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $version['path'].'.v'.$version['version']));
+			}
+		}
+	}
+
 	/**
 	 * translate a timestamp into a string like "5 days ago"
 	 * @param int $timestamp