check if some encrypted files are left after the app was disabled and warn the user

2 files changed, 25 insertions, 0 deletions

diff --git a/lib/public/util.php b/lib/public/util.php
index 693805946ea..b33f07b55e6 100644
--- a/lib/public/util.php
+++ b/lib/public/util.php
@@ -123,6 +123,14 @@ class Util {
 	}
 
 	/**
+	 * @brief check if some encrypted files are stored
+	 * @return bool
+	 */
+	public static function encryptedFiles() {
+		return \OC_Util::encryptedFiles();
+	}
+	
+	/**
 	 * @brief Creates an absolute url
 	 * @param string $app app
 	 * @param string $file file
diff --git a/lib/util.php b/lib/util.php
index 2586ad28320..cc432af62af 100755
--- a/lib/util.php
+++ b/lib/util.php
@@ -313,6 +313,23 @@ class OC_Util {
 	}
 
 	/**
+	 * @brief check if there are still some encrypted files stored
+	 * @return boolean
+	 */
+	public static function encryptedFiles() {
+		//check if encryption was enabled in the past
+		$encryptedFiles = false;
+		if (OC_App::isEnabled('files_encryption') === false) {
+			$view = new OC\Files\View('/' . OCP\User::getUser());
+			if ($view->file_exists('/files_encryption/keyfiles')) {
+				$encryptedFiles = true;
+			}
+		}
+		
+		return $encryptedFiles;
+	}
+	
+	/**
 	* Check for correct file permissions of data directory
 	* @return array arrays with error messages and hints
 	*/