first check if file exists before checking the files size

apps/files_versions/lib/versions.php

@@ -48,14 +48,14 @@ class Storage {
 
 	/**
 	 * get current size of all versions from a given user
-	 * 
+	 *
 	 * @param $user user who owns the versions
 	 * @return mixed versions size or false if no versions size is stored
 	 */
 	private static function getVersionsSize($user) {
 		$query = \OC_DB::prepare('SELECT `size` FROM `*PREFIX*files_versions` WHERE `user`=?');
 		$result = $query->execute(array($user))->fetchAll();
-		
+
 		if ($result) {
 			return $result[0]['size'];
 		}
@@ -64,7 +64,7 @@ class Storage {
 
 	/**
 	 * write to the database how much space is in use for versions
-	 * 
+	 *
 	 * @param $user owner of the versions
 	 * @param $size size of the versions
 	 */
@@ -76,20 +76,20 @@ class Storage {
 		}
 		$query->execute(array($size, $user));
 	}
-	
+
 	/**
 	 * store a new version of a file.
 	 */
 	public static function store($filename) {
 		if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
-			
+
 			// if the file gets streamed we need to remove the .part extension
 			// to get the right target
 			$ext = pathinfo($filename, PATHINFO_EXTENSION);
 			if ($ext === 'part') {
 				$filename = substr($filename, 0, strlen($filename)-5);
 			}
-			
+
 			list($uid, $filename) = self::getUidAndFilename($filename);
 
 			$files_view = new \OC\Files\View('/'.$uid .'/files');
@@ -104,8 +104,7 @@ class Storage {
 			// we should have a source file to work with, and the file shouldn't
 			// be empty
 			$fileExists = $files_view->file_exists($filename);
-			$fileSize = $files_view->filesize($filename);
-			if ($fileExists === false || $fileSize === 0) {
+			if (!($fileExists && $files_view->filesize($filename) > 0)) {
 				return false;
 			}
 
@@ -174,7 +173,7 @@ class Storage {
 		list($uidn, $newpath) = self::getUidAndFilename($new_path);
 		$versions_view = new \OC\Files\View('/'.$uid .'/files_versions');
 		$files_view = new \OC\Files\View('/'.$uid .'/files');
-		
+
 		// if the file already exists than it was a upload of a existing file
 		// over the web interface -> store() is the right function we need here
 		if ($files_view->file_exists($newpath)) {
@@ -435,7 +434,7 @@ class Storage {
 			} else {
 				$quota = \OCP\Util::computerFileSize($quota);
 			}
-			
+
 			// make sure that we have the current size of the version history
 			if ( $versionsSize === null ) {
 				$versionsSize = self::getVersionsSize($uid);