main

var express = require('express');
var app = express();
var fs = require("fs");
var user_counter =0;
 var bodyParser = require('body-parser');



app.use(express.static(__dirname));

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

var temp = new Object();
temp.name = req.query.email4; // takes the email from the login
temp.password = req.query.password4 ; // pass from login


   res.sendFile( __dirname + "/" + "final.html");
  var jas={};var  flag = 0;
  var data = String(fs.readFileSync( "users.json"));

       jas = JSON.parse( data );
              console.log("lolo");

       for(var i in jas)
       {

          if( req.query.email4 === jas[i].email && req.query.password4 === jas[i].password ){
              console.log("done two");
              console.log(jas[i].email);
              flag = 1 ;


          }

                  if (flag === 1)
         {         res.sendFile( __dirname + "/" + "final.html"); // open front end
}

                 console.log(jas[i].email);

        }





        if (flag === 0 ) {

          res.redirect('/interface.html'); // if doesn't exist it reloads the interface
          // we should show alert using ajax i didn't know how to use it




       }



 })

//part where we save new users

app.get('/interface',function(req,res){
  res.sendFile( __dirname + "/" + "interface.html");


});




app.get('/addUser', function (req, res) {
// First read existing users.
res.sendFile("/final.html",{root:__dirname});

var user = new Object();
user.name =req.query.name3;
user.email = req.query.email3;
user.password = req.query.password3;




  var jas={};
  var  flag = 0;
var data = String(fs.readFileSync("users.json"));


       jas = JSON.parse( data );

       for(var i in jas)
       {


          if(  jas[i].email === req.query.email3 || jas[i].name === req.query.name3){
              flag = 1 ;
  console.log('error');

          }



        }




        if (flag === 0 ) {
 jas ["user"+user_counter]= user;

             jas = JSON.stringify(jas);
             //fs.appendFile
              fs.writeFile("users.json", jas,'utf8');

              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)
})