del_visitor.js

// require('server');
const mongoose = require("mongoose");
const passport = require('passport');
const passportLocalMongoose = require('passport-local-mongoose');
const nodemailer = require('nodemailer');
var QRCode = require('qrcode')
module.exports = function(app) {


  const User = mongoose.model("User");


  app.get("/del_visitor", function(req, res) {
    res.redirect("/Profile");
  });

  app.post("/del_visitor", function(req, res) {
    var username = req.body.username;
    console.log(username);
    console.log(req.user.name);

    // username=username.slice(1,username.length);
    // console.log(username);
    User.findOne({
      username: username
    }, function(err, user) {
      if (err) {
        console.log(err)
      } else {
        if (user && user.status == "active") {

          var today = new Date(Date.now());
          var dd = today.getDate();
          var mm = today.getMonth() + 1; 
          var yyyy = today.getFullYear();
          if (dd < 10) {
            dd = '0' + dd
          }
          if (mm < 10) {
            mm = '0' + mm
          }

          today = yyyy + '-' + mm + '-' + dd;
          console.log(today);

          User.updateOne({
            username: req.body.username
          }, {
            status: "Inactive",
            outDate: today
          }, function() {
            var transporter = nodemailer.createTransport({
              service: 'gmail',
              auth: {
                user: process.env.GMAIL_ID,
                pass: process.env.GMAIL_PASS
              }
            });
            var mailOptions = {
              from: process.env.GMAIL_ID,
              to: user.email,
              subject: 'Thanks for your Visit',
              text: 'Thanks for visiting the building. Your username has been deactivated successfully\nYou can no longer use your username and password to login to your profile.\nVMS: https://vms-sasy.herokuapp.com/',
              attachDataUrls: true,
              // html:'<b>Thanks for visiting the building.</b>'+
              //      'Your username has been deactivated successfully<br>'+
              //      'You can no logner use your username and password to login to <a href="https://vms-sasy.herokuapp.com/" target="_blank">VMS</a>'
            };

            transporter.sendMail(mailOptions, function(error, info) {
              if (error) {
                console.log(error);
              } else {
                console.log('Email sent: ' + info.response);
              }
            });
            User.find({
              username: {
                $regex: /^v/
              }
            }, function(err, check) {
              if (err)
                console.log(err);
              else {
                // console.log(user.email);
                user = {
                  "name": "",
                  "sex": "",
                  "username": "",
                  "address": "",
                  "email": "",
                  "mobile": "",
                  "aadhar": "",
                  "password": "",
                  "status": ""
                };
                req.session.message = {
                  type: 'success',
                  intro: 'deactivate',
                  message: 'Visitor ID deactivated successfully'
                }
                res.render("admin_profile.ejs", {
                  Admin_Name: req.user.name,
                  details: check,
                  visitor: user,
                  message: req.session.message
                });
                // res.redirect("/");
              }
            })
          });
        } else {

          //USER DOES NPT EXIST MESSAGE
          User.find({
            username: {
              $regex: /^v/
            }
          }, function(err, check) {
            if (err)
              console.log(err);
            else {
              user = {
                "name": "",
                "sex": "",
                "username": "",
                "address": "",
                "email": "",
                "mobile": "",
                "aadhar": "",
                "password": "",
                "status": ""
              };

              req.session.message = {
                type: 'danger',
                intro: 'Invalid ID',
                message: 'Enter valid visitor ID'
              }
              res.render("admin_profile.ejs", {
                Admin_Name: req.user.name,
                details: check,
                visitor: user,
                message: req.session.message
              });
              // res.alert("NOT VALID ID")

              // res.alert("Enter valid id");

            }
          })
        }

      }
    })
  });
  //other routes..
}