fix(hapi16_support): add hapi 16 next() invocation [closes #744] (#743)

* chore(hapi16_support): add hapi 16 next() invocation

* run lint fix

* update changelog

CHANGELOG.md

@@ -4,6 +4,7 @@ All of the packages in the `apollo-server` repo are released with the same versi
 
 ### vNEXT
 
+* add hapi 16 next() invocation [PR #743](https://github.com/apollographql/apollo-server/pull/743)
 * Add skipValidation option [PR #839](https://github.com/apollographql/apollo-server/pull/839)
 * `apollo-server-module-graphiql`: adds an option to the constructor to disable url rewriting when editing a query [PR #1047](https://github.com/apollographql/apollo-server/pull/1047)
 * Upgrade `subscription-transport-ws` to 0.9.9 for Graphiql

packages/apollo-server-hapi/README.md

@@ -15,7 +15,7 @@ npm install apollo-server-hapi
 
 With the Hapi plugins `graphqlHapi` and `graphiqlHapi` you can pass a route object that includes options to be applied to the route. The example below enables CORS on the `/graphql` route.
 
-The code below requires Hapi 17 or higher.
+The code below requires Hapi 17, See below for Hapi 16 support.
 
 ```js
 import Hapi from 'hapi';
@@ -55,6 +55,67 @@ async function StartServer() {
 StartServer();
 ```
 
+## Hapi 16
+
+Imports must be monkey patched for Hapi 16 support (mainly attributes).
+
+```js
+import { graphqlHapi, graphiqlHapi } from 'apollo-server-hapi';
+
+// add attributes for hapi 16
+graphqlHapi.attributes = {
+  name: graphqlHapi.name,
+};
+
+// if you happen to use graphiql then add attributes for hapi 16
+graphiqlHapi.attributes = {
+  name: graphiqlHapi.name,
+};
+
+async function StartServer() {
+  const server = new Hapi.server({
+    host: HOST,
+    port: PORT,
+  });
+
+  await server.register({
+    plugin: graphqlHapi,
+    options: {
+      path: '/graphql',
+      graphqlOptions: {
+        schema: myGraphQLSchema,
+      },
+      route: {
+        cors: true,
+      },
+    },
+  });
+
+  await server.register({
+    plugin: graphiqlHapi,
+    options: {
+      path: '/graphiql',
+      route: {
+        cors: true,
+      },
+      graphiqlOptions: {
+        endpointURL: 'graphql',
+      },
+    },
+  });
+
+  try {
+    await server.start();
+  } catch (err) {
+    console.log(`Error while starting server: ${err.message}`);
+  }
+
+  console.log(`Server running at: ${server.info.uri}`);
+}
+
+StartServer();
+```
+
 ## Principles
 
 Apollo Server is built with the following principles in mind:

packages/apollo-server-hapi/src/hapiApollo.ts

@@ -8,7 +8,7 @@ import {
 } from 'apollo-server-core';
 
 export interface IRegister {
-  (server: Server, options: any): void;
+  (server: Server, options: any, next?: Function): void;
 }
 
 export interface IPlugin {
@@ -30,7 +30,7 @@ export interface HapiPluginOptions {
 
 const graphqlHapi: IPlugin = {
   name: 'graphql',
-  register: (server: Server, options: HapiPluginOptions) => {
+  register: (server: Server, options: HapiPluginOptions, next?: Function) => {
     if (!options || !options.graphqlOptions) {
       throw new Error('Apollo Server requires options.');
     }
@@ -75,6 +75,10 @@ const graphqlHapi: IPlugin = {
         }
       },
     });
+
+    if (next) {
+      next();
+    }
   },
 };
 
@@ -90,7 +94,11 @@ export interface HapiGraphiQLPluginOptions {
 
 const graphiqlHapi: IPlugin = {
   name: 'graphiql',
-  register: (server: Server, options: HapiGraphiQLPluginOptions) => {
+  register: (
+    server: Server,
+    options: HapiGraphiQLPluginOptions,
+    next?: Function,
+  ) => {
     if (!options || !options.graphiqlOptions) {
       throw new Error('Apollo Server GraphiQL requires options.');
     }
@@ -111,6 +119,10 @@ const graphiqlHapi: IPlugin = {
         return response;
       },
     });
+
+    if (next) {
+      next();
+    }
   },
 };