Fixes #15: Added new file sentiment-analysis.js. Added dependencies (#46

)

* Fixes #15. Added new file sentiment-analysis.js. Added dependencies

* Fixed Typo in comments

* Update src/sentiment-analysis.js

Adds async function.

Co-Authored-By: David Humphrey <david.humphrey@senecacollege.ca>

* Replaced var with const, updated function.

* Updated sentiment-analysis.js

package.json

@@ -20,7 +20,8 @@
     "bent": "^7.0.2",
     "bull": "^3.11.0",
     "dotenv": "^8.2.0",
-    "feedparser-promised": "^2.0.1"
+    "feedparser-promised": "^2.0.1",
+    "sentiment": "^5.0.2"
   },
   "devDependencies": {
     "eslint": "^6.6.0",

src/sentiment-analysis.js

@@ -0,0 +1,13 @@
+/* This file contains the code for analyzing blog posts text to identify the
+ * negative or positve words being used in a post and return a summary of it
+ * along with a score. The file uses a node module called sentiment to implement
+ * the functionality of analyzing text of blogs. The function accepts plain
+ * text as a parameter i.e text containg no HTML tags, and returns a promise
+ * object whcih contains the result.
+*/
+const Sentiment = require('sentiment');
+
+module.exports.run = async function (text) {
+  const sentiment = new Sentiment();
+  return Promise.resolve(sentiment.analyze(text));
+};