1 files changed, 30 insertions, 1 deletions
diff --git a/apps/encryption/lib/util.php b/apps/encryption/lib/util.php
index 51d5241122f..afed96aaa38 100644
--- a/apps/encryption/lib/util.php
+++ b/apps/encryption/lib/util.php
@@ -29,6 +29,7 @@ use OCA\Encryption\Crypto\Crypt;
 use OCP\IConfig;
 use OCP\ILogger;
 use OCP\IUser;
+use OCP\IUserManager;
 use OCP\IUserSession;
 use OCP\PreConditionNotMetException;
 
@@ -53,6 +54,10 @@ class Util {
 	 * @var IConfig
 	 */
 	private $config;
+	/**
+	 * @var IUserManager
+	 */
+	private $userManager;
 
 	/**
 	 * Util constructor.
@@ -62,18 +67,21 @@ class Util {
 	 * @param ILogger $logger
 	 * @param IUserSession $userSession
 	 * @param IConfig $config
+	 * @param IUserManager $userManager
 	 */
 	public function __construct(View $files,
 								Crypt $crypt,
 								ILogger $logger,
 								IUserSession $userSession,
-								IConfig $config
+								IConfig $config,
+								IUserManager $userManager
 	) {
 		$this->files = $files;
 		$this->crypt = $crypt;
 		$this->logger = $logger;
 		$this->user = $userSession && $userSession->isLoggedIn() ? $userSession->getUser() : false;
 		$this->config = $config;
+		$this->userManager = $userManager;
 	}
 
 	/**
@@ -117,5 +125,26 @@ class Util {
 		return $this->files->file_exists($uid . '/files');
 	}
 
+	/**
+	 * get owner from give path, path relative to data/ expected
+	 *
+	 * @param string $path relative to data/
+	 * @return string
+	 * @throws \BadMethodCallException
+	 */
+	public function getOwner($path) {
+		$owner = '';
+		$parts = explode('/', $path, 3);
+		if (count($parts) > 1) {
+			$owner = $parts[1];
+			if ($this->userManager->userExists($owner) === false) {
+				throw new \BadMethodCallException('Unknown user: ' .
+				'method expects path to a user folder relative to the data folder');
+			}
+
+		}
+
+		return $owner;
+	}
 
 }