Add simple tweet text sentiment analysis

package.json

@@ -7,7 +7,9 @@
   "license": "MIT",
   "dependencies": {
     "@google-cloud/functions-framework": "^3.1.2",
-    "axios": "^1.1.0"
+    "@types/sentiment": "^5.0.1",
+    "axios": "^1.1.0",
+    "sentiment": "^5.0.2"
   },
   "scripts": {
     "start": "functions-framework --source=build/src/ --target=run --port=8088",

src/helpers/calculateSentiment.ts

@@ -0,0 +1,6 @@
+import * as Sentiment from 'sentiment';
+
+const sentiment = new Sentiment();
+const calculateSentiment = (text: string) => sentiment.analyze(text);
+
+export default calculateSentiment;

src/index.ts

@@ -11,6 +11,7 @@
 import type {HttpFunction} from '@google-cloud/functions-framework/build/src/functions';
 import getUser from './api/getUser';
 import getTweets from './api/getTweets';
+import calculateSentiment from './helpers/calculateSentiment';
 
 const twitterUsername = 'wesleylemahieu';
 
@@ -39,6 +40,10 @@ export const run: HttpFunction = async (req, res) => {
   res.send({
     // likes: likes?.data,
     nextToken: newNextToken,
-    tweets,
+    tweets: tweets.map(tweet => ({
+      ...tweet,
+      sentiment: calculateSentiment(tweet.text),
+    })),
+    twitterUsername,
   });
 };