ServerJs NodeJs ExpressJs

// var firebase = require('firebase');
var firebase = require("firebase-admin");
var email   = require("emailjs/email");
var server  = email.server.connect({
   user:    "XXXXXX",
   password:"XXXXXXXX",
   host:    "smtp.gmail.com",
   ssl:     true
});





firebase.initializeApp({
  credential: firebase.credential.cert('./Civil Service-XXXXXX80.json'),
  databaseURL: "https://cXXvil-seXXiXXe-XXXX.firebaseio.com"
});
var LocalStorage = require('node-localstorage').LocalStorage;
var localStorage = new LocalStorage('./scratch');



var signed = false;
var http = require('http');
var util = require('util');
var fs = require('fs');
var express = require('express');
var app = express();
var router = express.Router();
var path    = require("path");

var url=require('url');
var authenticationFlag = false;
var userid = localStorage.getItem('currentUserID');
var index = fs.readFileSync('index.html');
var users = fs.readFileSync('users.html');
app.use(express.static('public'));


/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/



app.post('/sendmail', function(req,res, next){
    var to = '';
    var from = 'nom@XXXtXc.com';
    var subject = '';
    var message = '';
    req.on('data', function (chunk) {
        var obj = JSON.parse(chunk);
        to = obj.to;
        subject = obj.subject;
        message = obj.message;
        server.send({
           text:    message,
           from:    "nom@XXXXic.com",
           to:      to,
           cc:      "",
           subject: subject
        }, function(err, message) {
          console.log(err || message);
        });
        res.status(200).send('Success');
  });
});






app.post('/server', function(req,res, next){
    var idToken = '';
    req.on('data', function (chunk) {
        var obj = JSON.parse(chunk);
        idToken = obj.idToken;
       firebase.auth().verifyIdToken(idToken)
          .then(function(decodedToken) {
           var uid = decodedToken.uid;
           console.log("UID:"+uid);
           localStorage.setItem('authflag', 'true');
           localStorage.setItem('currentUserID', uid);
           console.log("IN SERVER:"+localStorage.getItem('authflag'));
           res.status(200).send('Success');
         }).catch(function(error) {
            console.log('ERROR IS:'+error);
            authenticationFlag = false;
            res.status(400).send('Wrong details');
       });
  });
});

function hasFilledDetails(){
  var userid = localStorage.getItem('currentUserID');
  return firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      return false;
    }else{
      return true;
    }
  });
}

function isApproved(){
  var userid = localStorage.getItem('currentUserID');
  return firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().approved === '') {
      return false;
    }else{
      return true;
    }
  });
}


app.get('/logout', function(req, res){
  localStorage.removeItem('currentUserID');
  localStorage.setItem('authflag', 'false');
  res.sendFile(path.join(__dirname+'/logout.html'));
});

app.get('/login',function(req,res){
  console.log("AUTH FLAG IS:"+localStorage.getItem('authflag'));
  console.log(authenticationFlag);
  if (localStorage.getItem('authflag') == 'true') {

    if (hasFilledDetails()) {
      console.log("REDIRECTING TO PROFILE HAS FILLED");
      res.redirect('/profile');
    }else{
      console.log("REDIRECTING TO SIGNUP2 HAS NOT FILLED");
      res.redirect('/signup2');
    }

  }else{
    res.sendFile(path.join(__dirname+'/login.html'));
  }

});



app.get('/signup2',function(req,res){

  if (localStorage.getItem('authflag') == 'true') {
      firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
        if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
          console.log("SENDING SIGNUP2 FILE");
          res.sendFile(path.join(__dirname+'/signup2.html'));
        }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          console.log("REDIRECTING TO APPROVAL");
          res.redirect('/approval');
        }else{
          console.log("REDIRECTING TO DASHBOARD");
          res.redirect('/dashboard');
          //res.sendFile(path.join(__dirname+'/login.html'));
        }
      });
  }else{
    res.sendFile(path.join(__dirname+'/login.html'));
  }

});




app.get('/dashboard', authenticationRequired ,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val() !== null) {
      if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
        res.redirect('/signup2');
      }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          console.log("APPROVED IS:"+snapshot.val().approved);
            // res.redirect('/approval');
            res.sendFile(path.join(__dirname+'/site/approval.html'));
      }else{
        res.sendFile(path.join(__dirname+'/index.html'));
      }
    }else{
      res.redirect('/logout');
    }

  });
});
app.get('/', authenticationRequired ,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          // res.redirect('/approval');
          res.sendFile(path.join(__dirname+'/site/approval.html'));
    }else{
      res.redirect('/dashboard');
    }
  });
});

  app.get('/approval', authenticationRequired ,function(req,res){
      firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
        if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
          res.redirect('/signup2');
        }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
              res.sendFile(path.join(__dirname+'/site/approval.html'));
        }else{
          res.sendFile(path.join(__dirname+'/site/approval.html'));
        }
      });
  });
app.get('/firebase-messaging-sw.js', authenticationRequired ,function(req,res){
  res.sendFile(path.join(__dirname+'/public/js/firebase-messaging-sw.js'));
  //__dirname : It will resolve to your project folder.
});

app.get('/directory', authenticationRequired ,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/directory.html'));
    }
  });
    //res.sendFile(path.join(__dirname+'/site/directory.html'));
});
// app.get('/signup2', authenticationRequired ,function(req,res){
//   res.sendFile(path.join(__dirname+'/signup2.html'));
// });
app.get('/messages', authenticationRequired ,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/messages.html'));
    }
  });
  //res.sendFile(path.join(__dirname+'/site/messages.html'));
});
app.get('/settings', authenticationRequired ,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/settings.html'));
    }
  });
  // res.sendFile(path.join(__dirname+'/site/settings.html'));
});

app.get('/profile', authenticationRequired ,function(req,res){
  // res.sendFile(path.join(__dirname+'/site/profile.html'));
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/profile.html'));
    }
  });
});
app.get('/viewuser', authenticationRequired ,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/viewuser.html'));
    }
  });
    //res.sendFile(path.join(__dirname+'/site/viewuser.html'));
});
app.get('/news', authenticationRequired,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/news.html'));
    }
  });
 //res.sendFile(path.join(__dirname+'/site/news.html'));
});
app.get('/viewnews', authenticationRequired,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/newsdetail.html'));
    }
  });
 //res.sendFile(path.join(__dirname+'/site/viewnews.html'));
});

app.get('/publications', authenticationRequired,function(req,res){
  firebase.database().ref('/users/' + userid).on('value', function(snapshot) {
    if (snapshot.val().phone == '' || snapshot.val().phone == null || snapshot.val().phone == undefined) {
      res.redirect('/signup2');
    }else if(snapshot.val().approved == '0' || snapshot.val().approved == 0){
          res.redirect('/approval');
    }else{
      res.sendFile(path.join(__dirname+'/site/publications.html'));
    }
  });
  //res.sendFile(path.join(__dirname+'/site/publications.html'));
});


app.get('*', function(req, res){
  res.sendFile(path.join(__dirname+'/404.html'));
});

//app.use('/', router);
app.listen(9615);



function authenticationRequired(req, res, next) {

   var authflag = localStorage.getItem('authflag');
   console.log("In AUTH FUNCTION: "+authflag);
   if(authflag == 'true') {
       next()
   } else {
       res.status(401).sendFile(path.join(__dirname+'/login.html'));
   }
}







console.log('Server running at http://localhost:9615/');