From 4bd57c4b43d9cbe0ae5b9b45c1307af4624b31c9 Mon Sep 17 00:00:00 2001
From: dotansimha <dotansimha@gmail.com>
Date: Tue, 24 Jan 2017 15:14:19 +0200
Subject: [PATCH] Step 6.17: Use check to add validations

---
 api/server/methods.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/api/server/methods.ts b/api/server/methods.ts
index ce7c3d444..02f8466ad 100644
--- a/api/server/methods.ts
+++ b/api/server/methods.ts
@@ -1,9 +1,19 @@
 import { Chats } from './collections/chats';
 import { Messages } from './collections/messages';
 import { MessageType } from './models';
+import { check, Match } from 'meteor/check';
+
+const nonEmptyString = Match.Where((str) => {
+  check(str, String);
+  return str.length > 0;
+});
 
 Meteor.methods({
   addMessage(type: MessageType, chatId: string, content: string) {
+    check(type, Match.OneOf(String, [ MessageType.TEXT ]));
+    check(chatId, nonEmptyString);
+    check(content, nonEmptyString);
+
     const chatExists = !!Chats.collection.find(chatId).count();
 
     if (!chatExists) {