mail-analytics-service/index.js

const express = require('express')
const app = express()
app.use(express.json())
app.use(express.static('public'));
const port = 3104

var chalk = require("chalk");
var db = require("kairoscope-db-models");

var e = chalk.red('ERROR:');

db.start_database().then(() => {
  app.get('/', (req, res) => {
      res.send("Mail Analytics Service");
  })
  app.get('/track/:id/image.png', function(req, res, next){
    var id = req.params.id;
    res.sendFile('image.png', {root: './public'});
    db.SentMail.findOne({message_id: id}).then((message) => {
      if(message != undefined) {
        message.opened = true;
        message.save().then((message) => {
          console.log(`Tracking email ${chalk.italic(id)}`);
        }).catch((error) => { console.log(error); });  
      } else {
        console.log(`${e} Tracking code not in database! (${chalk.italic(id)})`);
      }
    }).catch((error) => { console.log(error); });
  });
  
  
  app.listen(port, () => {
    console.log(`Mail Analytics Service listening at ${chalk.cyan(`http://localhost:${port}`)}`);
  })
})