local user backend shall search for both username and displayname, fixes #5401

lib/private/user/database.php

@@ -156,25 +156,14 @@ class OC_User_Database extends OC_User_Backend {
 	public function getDisplayNames($search = '', $limit = null, $offset = null) {
 		$displayNames = array();
 		$query = OC_DB::prepare('SELECT `uid`, `displayname` FROM `*PREFIX*users`'
-			.' WHERE LOWER(`displayname`) LIKE LOWER(?)', $limit, $offset);
-		$result = $query->execute(array($search.'%'));
+			.' WHERE LOWER(`displayname`) LIKE LOWER(?) OR '
+			.'LOWER(`uid`) LIKE LOWER(?)', $limit, $offset);
+		$result = $query->execute(array($search.'%', $search.'%'));
 		$users = array();
 		while ($row = $result->fetchRow()) {
 			$displayNames[$row['uid']] = $row['displayname'];
 		}
 
-		// let's see if we can also find some users who don't have a display name yet
-		$query = OC_DB::prepare('SELECT `uid`, `displayname` FROM `*PREFIX*users`'
-			.' WHERE LOWER(`uid`) LIKE LOWER(?)', $limit, $offset);
-		$result = $query->execute(array($search.'%'));
-		while ($row = $result->fetchRow()) {
-			$displayName =  trim($row['displayname'], ' ');
-			if ( empty($displayName) ) {
-				$displayNames[$row['uid']] = $row['uid'];
-			}
-		}
-
-
 		return $displayNames;
 	}