config: Analytics mixpanel

server/.env.example

@@ -1,8 +1,11 @@
 NODE_ENV=development
 CLIENT_PROD_URL=http://localhost:3000
-DB_URL=
 REDIRECT_URL=http://localhost:8080
+
+DB_URL=
+
 JWT_SECRET_KEY=
+
 REDIS_URL=
 HITS_COUNT_LIMIT=100
 EXPIRATION_TIME=60

server/config/mixpanel.js

@@ -0,0 +1,18 @@
+const Mixpanel = require("mixpanel");
+
+// track an event with optional properties
+const trackEvent = (eventName, value) => {
+  const mixPanelProjectToken = process.env.MIXPANEL_PROJECT_TOKEN;
+
+  if (mixPanelProjectToken) {
+    const mixpanel = Mixpanel.init(process.env.MIXPANEL_PROJECT_TOKEN, {
+      geolocate: true,
+    });
+
+    mixpanel.track(eventName, {
+      url: value,
+    });
+  }
+};
+
+module.exports = trackEvent;

server/controller/auth.js

@@ -1,7 +1,7 @@
 const userModel = require("../model/userSchema");
 const jwt = require("jsonwebtoken");
 const bcrypt = require("bcrypt");
-const dbConnect = require("../model/dbConnect");
+const dbConnect = require("../config/dbConnect");
 
 const signup = async (req, res) => {
   try {

server/controller/urls.js

@@ -1,8 +1,9 @@
 const urlModel = require("../model/urlSchema");
 const validUrl = require("valid-url");
 const uniqueString = require("../utils/utils");
-const dbConnect = require("../model/dbConnect");
+const dbConnect = require("../config/dbConnect");
 const dotenv = require("dotenv");
+const trackEvent = require("../config/mixpanel");
 
 dotenv.config();
 
@@ -52,7 +53,12 @@ const createUrl = async (req, res) => {
       // If the URL exists, return the existing shortId
       if (urlExist) {
         const shortId = urlExist.shortId;
-        return res.status(201).json(`${process.env.REDIRECT_URL}/${shortId}`);
+        const shortenedURL = `${process.env.REDIRECT_URL}/${shortId}`;
+
+        // track event
+        trackEvent("Existing URL", shortenedURL);
+
+        return res.status(201).json(shortenedURL);
       } else {
         // If the URL does not exist, generate a new shortId and save the URL to the database
         const shortId = uniqueString.generateBase62String();
@@ -65,6 +71,9 @@ const createUrl = async (req, res) => {
         // Save the new URL to the database
         await newUrl.save();
 
+        // track event
+        trackEvent("New URL shortened", originalUrl);
+
         // Send the newly created short URL to the client
         return res.status(201).json(`${process.env.REDIRECT_URL}/${shortId}`);
       }

server/controller/user.js

@@ -1,5 +1,5 @@
 const urlModel = require("../model/urlSchema");
-const dbConnect = require("../model/dbConnect");
+const dbConnect = require("../config/dbConnect");
 const dotenv = require("dotenv");
 
 dotenv.config();

server/model/urlSchema.js

@@ -8,7 +8,7 @@ const urlSchema = new mongoose.Schema(
     userId: {
       type: mongoose.Schema.Types.ObjectId,
       ref: "User",
-      required: true,
+      required: false,
     },
     originalUrl: {
       type: String,

server/package.json

@@ -16,6 +16,7 @@
     "express": "^4.18.2",
     "ioredis": "^5.4.1",
     "jsonwebtoken": "^9.0.2",
+    "mixpanel": "^0.18.0",
     "mongoose": "^7.0.5",
     "valid-url": "^1.0.9"
   },