only return minimal info for pending and invited users

src/groups.js

@@ -121,10 +121,10 @@ Groups.get = function (groupName, options, callback) {
 					Groups.getOwnersAndMembers(groupName, options.uid, 0, stop, next);
 				},
 				pending: function (next) {
-					Groups.getUsersFromSet('group:' + groupName + ':pending', next);
+					Groups.getUsersFromSet('group:' + groupName + ':pending', ['username', 'userslug', 'picture'], next);
 				},
 				invited: function (next) {
-					Groups.getUsersFromSet('group:' + groupName + ':invited', next);
+					Groups.getUsersFromSet('group:' + groupName + ':invited', ['username', 'userslug', 'picture'], next);
 				},
 				isMember: async.apply(Groups.isMember, options.uid, groupName),
 				isPending: async.apply(Groups.isPending, options.uid, groupName),

src/groups/user.js

@@ -6,13 +6,21 @@ var db = require('../database');
 var user = require('../user');
 
 module.exports = function (Groups) {
-	Groups.getUsersFromSet = function (set, callback) {
+	Groups.getUsersFromSet = function (set, fields, callback) {
+		if (typeof fields === 'function') {
+			callback = fields;
+			fields = null;
+		}
 		async.waterfall([
 			function (next) {
 				db.getSetMembers(set, next);
 			},
 			function (uids, next) {
-				user.getUsersData(uids, next);
+				if (fields) {
+					user.getUsersFields(uids, fields, callback);
+				} else {
+					user.getUsersData(uids, next);
+				}
 			},
 		], callback);
 	};