Display of online state for nodes and hostname for monitoring info in admin panel.

server/utils/databaseUtil.js

@@ -0,0 +1,12 @@
+'use strict';
+
+angular.module('ffffng').factory('DatabaseUtil', function (_) {
+    return {
+        inCondition: function (field, list) {
+            return {
+                query: '(' + field + ' IN (' + _.join(_.times(list.length, _.constant('?')), ', ') + '))',
+                params: list
+            };
+        }
+    };
+});