Step 2.1: Update Schema

server/data/schema.js

@@ -0,0 +1,35 @@
+import { gql } from 'apollo-server';
+
+export const typeDefs = gql`
+  # declare custom scalars
+  scalar Date
+
+  # a group chat entity
+  type Group {
+    id: Int! # unique id for the group
+    name: String # name of the group
+    users: [User]! # users in the group
+    messages: [Message] # messages sent to the group
+  }
+
+  # a user -- keep type really simple for now
+  type User {
+    id: Int! # unique id for the user
+    email: String! # we will also require a unique email per user
+    username: String # this is the name we'll show other users
+    messages: [Message] # messages sent by user
+    groups: [Group] # groups the user belongs to
+    friends: [User] # user's friends/contacts
+  }
+
+  # a message sent from a user to a group
+  type Message {
+    id: Int! # unique id for message
+    to: Group! # group message was sent in
+    from: User! # user who sent the message
+    text: String! # message text
+    createdAt: Date! # when message was created
+  }
+`;
+
+export default typeDefs;

server/index.js

@@ -1,14 +1,8 @@
-import { ApolloServer, gql } from 'apollo-server';
+import { ApolloServer } from 'apollo-server';
+import { typeDefs } from './data/schema';
 
 const PORT = 8080;
 
-// basic schema
-const typeDefs = gql`
-  type Query {
-    testString: String
-  }
-`;
-
 const server = new ApolloServer({ typeDefs, mocks: true });
 
 server.listen({ port: PORT }).then(({ url }) => console.log(`🚀 Server ready at ${url}`));