add twitter handler

handlers/twitter.js

@@ -0,0 +1,30 @@
+const Twitter = require('twitter')
+
+const client = new Twitter({
+  consumer_key: process.env.TWITTER_CONSUMER_KEY,
+  consumer_secret: process.env.TWITTER_CONSUMER_SECRET,
+  access_token_key: process.env.TWITTER_ACCESS_TOKEN_KEY,
+  access_token_secret: process.env.TWITTER_ACCESS_TOKEN_SECRET
+})
+
+const uploadImage = (data) => client.post('media/upload', { media_data: data })
+const uploadTweet = (media) => client.post('statuses/update', { status: 'carbon copy', media_ids: media.media_id_string })
+const extractImageUrl = (stuff) => console.log(stuff.entities.media[0].media_url)
+
+const respondSuccess = (res, url) => res.json({ url })
+const respondFail = (res, err) => {
+  console.error(`Error: ${err.message || err}`)
+  res.status(500).send()
+}
+
+module.exports = (req, res) => {
+  if (!req.body.data) {
+    return res.status(400).send()
+  }
+
+  uploadImage(req.body.data)
+    .then(uploadTweet)
+    .then(extractImageUrl)
+    .then(respondSuccess.bind(null, res))
+    .catch(respondFail.bind(null, res))
+}