From 5dbb32fb81e5e11c5ba4386ec54457da4483f86e Mon Sep 17 00:00:00 2001
From: Vincent Petry <pvince81@owncloud.com>
Date: Tue, 22 Nov 2016 10:22:00 +0100
Subject: [PATCH] Properly expire ext storage versions (#26601)

* Properly expire ext storage versions

System-wide external storages have no real owner so the current user is
used as owner. However when running cron.php there is no current user,
so no expiry can be done.

This fix adds an user argument to the expire() function to tell for
which user to expire files. This information is anyway always available
now through the expire command job.

* Move version expire setupFS into the expire function

* Add comment about not tearing down in version Storage::expire()

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>
---
 apps/files_versions/lib/Command/Expire.php   |  4 +---
 apps/files_versions/lib/Storage.php          | 21 ++++++++++++++------
 apps/files_versions/tests/VersioningTest.php | 14 ++++++++++++-
 3 files changed, 29 insertions(+), 10 deletions(-)

diff --git a/apps/files_versions/lib/Command/Expire.php b/apps/files_versions/lib/Command/Expire.php
index fecffd2f3c..794cedbac9 100644
--- a/apps/files_versions/lib/Command/Expire.php
+++ b/apps/files_versions/lib/Command/Expire.php
@@ -58,8 +58,6 @@ class Expire implements ICommand {
 			return;
 		}
 
-		\OC_Util::setupFS($this->user);
-		Storage::expire($this->fileName);
-		\OC_Util::tearDownFS();
+		Storage::expire($this->fileName, $this->user);
 	}
 }
diff --git a/apps/files_versions/lib/Storage.php b/apps/files_versions/lib/Storage.php
index 1aa19274c4..9aa9e6d526 100644
--- a/apps/files_versions/lib/Storage.php
+++ b/apps/files_versions/lib/Storage.php
@@ -688,30 +688,39 @@ class Storage {
 	}
 
 	/**
-	 * Expire versions which exceed the quota
+	 * Expire versions which exceed the quota.
 	 *
-	 * @param string $filename
+	 * This will setup the filesystem for the given user but will not
+	 * tear it down afterwards.
+	 *
+	 * @param string $filename path to file to expire
+	 * @param string $uid user for which to expire the version
 	 * @return bool|int|null
 	 */
-	public static function expire($filename) {
+	public static function expire($filename, $uid) {
 		$config = \OC::$server->getConfig();
 		$expiration = self::getExpiration();
 
 		if($config->getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true' && $expiration->isEnabled()) {
+			// get available disk space for user
+			$user = \OC::$server->getUserManager()->get($uid);
+			if (is_null($user)) {
+				\OCP\Util::writeLog('files_versions', 'Backends provided no user object for ' . $uid, \OCP\Util::ERROR);
+				throw new \OC\User\NoUserException('Backends provided no user object for ' . $uid);
+			}
+
+			\OC_Util::setupFS($uid);
 
 			if (!Filesystem::file_exists($filename)) {
 				return false;
 			}
 
-			list($uid, $filename) = self::getUidAndFilename($filename);
 			if (empty($filename)) {
 				// file maybe renamed or deleted
 				return false;
 			}
 			$versionsFileview = new View('/'.$uid.'/files_versions');
 
-			// get available disk space for user
-			$user = \OC::$server->getUserManager()->get($uid);
 			$softQuota = true;
 			$quota = $user->getQuota();
 			if ( $quota === null || $quota === 'none' ) {
diff --git a/apps/files_versions/tests/VersioningTest.php b/apps/files_versions/tests/VersioningTest.php
index de79327e08..a1649b2b60 100644
--- a/apps/files_versions/tests/VersioningTest.php
+++ b/apps/files_versions/tests/VersioningTest.php
@@ -612,7 +612,19 @@ class VersioningTest extends \Test\TestCase {
 		// needed to have a FS setup (the background job does this)
 		\OC_Util::setupFS(self::TEST_VERSIONS_USER);
 
-		$this->assertFalse(\OCA\Files_Versions\Storage::expire('/void/unexist.txt'));
+		$this->assertFalse(\OCA\Files_Versions\Storage::expire('/void/unexist.txt', self::TEST_VERSIONS_USER));
+	}
+
+	/**
+	 * @expectedException \OC\User\NoUserException
+	 */
+	public function testExpireNonexistingUser() {
+		$this->logout();
+		// needed to have a FS setup (the background job does this)
+		\OC_Util::setupFS(self::TEST_VERSIONS_USER);
+		\OC\Files\Filesystem::file_put_contents("test.txt", "test file");
+
+		$this->assertFalse(\OCA\Files_Versions\Storage::expire('test.txt', 'unexist'));
 	}
 
 	public function testRestoreSameStorage() {