From b3e6b66054cc65446709b5427e7ec439fde02b2a Mon Sep 17 00:00:00 2001
From: Lucas Santos <lhs.santoss@gmail.com>
Date: Thu, 31 Aug 2017 14:44:00 -0300
Subject: [PATCH] Fixing non working example with publish

Publish example was not working, so I updated it to the new API (because I needed to read the source code to understand this part), so it's easier for us to use the docs.

Here's my code as an example:

> publisher.js
```js
const PubSub = require('@google-cloud/pubsub')
const chalk = require('chalk')

function run () {
  console.log(chalk.bold.cyan('Publishing Message...'))
  return PubSub().topic('my-topic').publisher().publish(new Buffer.from(process.argv.pop()))
    .then((results) => {
      console.log(`Message ${chalk.bold.green(results.shift())} published`)
      return results
    })
    .catch(console.error)
}

run()
```

Use it like `node publisher.js <mydata>`
---
 pubsub/topics.js | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/pubsub/topics.js b/pubsub/topics.js
index a6b1ed120a..d026793db3 100644
--- a/pubsub/topics.js
+++ b/pubsub/topics.js
@@ -83,13 +83,19 @@ function publishMessage (topicName, data) {
 
   // References an existing topic, e.g. "my-topic"
   const topic = pubsub.topic(topicName);
-
+  
+  // Creates a new Topic Publisher
+  const publisher = topic.publisher()
+  
+  // Creates a new Buffer from data
+  let dataBuffer = new Buffer.from(data)
+  
   // Publishes the message, e.g. "Hello, world!" or { amount: 599.00, status: 'pending' }
-  return topic.publish(data)
+  return publisher.publish(dataBuffer)
     .then((results) => {
-      const messageIds = results[0];
+      const messageIds = results.shift(); // Or results[0] since it returns [ 'ID' ]
 
-      console.log(`Message ${messageIds[0]} published.`);
+      console.log(`Message ${messageIds} published.`);
 
       return messageIds;
     });