helper.js

const winston = require("winston");

winston.add(winston.transports.File, { filename: "backup.log" });
winston.remove(winston.transports.Console);

const { exec } = require("child_process");
const path = require("path");
const nodemailer = require("nodemailer");

const backupDB = (db, basePath, cb) => {
  winston.log("info", "dumping db ...");
  const currentDate = new Date().toGMTString();
  const fileName = currentDate.replace(/[, .*+?^${}()|[\]\\]/g, ""); // + '.gzip'
  const filePath = path.join(basePath, fileName);

  exec(`mongodump --db ${db} --gzip --archive=${filePath}`, () =>
    cb(null, fileName)
  );
};
const emailSender = (data, cb) => {
  winston.log("info", "sending email ...");
  const transporter = nodemailer.createTransport({
    host: "smtp.gmail.com",
    port: 465,
    secure: true, // secure:true for port 465, secure:false for port 587
    auth: {
      user: data.email,
      pass: data.password
    }
  });

  const attachments = [];

  const filePath = path.join(data.path, data.fileName);
  attachments[attachments.length] = { path: filePath };

  const mailOptions = {
    from: data.email,
    to: data.email, // list of receivers
    subject: data.subject, // Subject line
    html: "",
    attachments
  };

  transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
      winston.log("warn", error);
      return cb(error);
    }
    return cb(null, info);
  });
};
module.exports = {
  backup: (db, basePath, email, password, project) => {
    winston.log("info", "sending email ...");
    backupDB(db, basePath, (err, fileName) => {
      emailSender(
        {
          email,
          password,
          path: basePath,
          fileName,
          subject: `${project} ${fileName}`
        },
        () => {}
      );
    });
  }
};