var express = require('express');
var app = express();
var fs = require("fs");
var user_counter =0;

app.get('/addUser', function (req, res) {
// First read existing users.
user = {
       name:req.query.name3,
       email:req.query.email3,
       password:req.query.password3,
       html:'gjyf'

   };
fs.readFile( __dirname + "/" + "users.json", 'utf8', function (err, data) {
       data = JSON.parse( data );
var i ;
       for(var i in data)
       {

          if(user.name==data[i].name && user.email==data[i].email ){

               res.sendFile( __dirname + "/" + "final.html");


          }

          else{

             data["user"+ user_counter] = user;
             console.log( data );
             data = JSON.stringify(data);
             res.end( data );
             user_counter++;
                            res.sendFile( __dirname + "/" + "final.html");


          }
       }

}); })
var server = app.listen(8081, function () {
var host = server.address().address
var port = server.address().port
console.log("Example app listening at http://%s:%s", host, port)
})