web.js

/*
 * Author: Rohit Kumar
 * Date: 12-06-2014
 * App Name: Iamchat
 * Website: iamrohit.in
 * Description: Chat application using nodejs and socket.io
 */
var express = require('express');
var http = require('http');
var nodemailer = require("nodemailer");
var ios= require('socket.io');
var path = require('path');
var bodyParser = require('body-parser')
var users = [];
var messages = [];
var usersActivity = [];
var onlineClient = {};

var app = express();
app.use(express.static(path.join(__dirname, 'public')));
app.use( bodyParser.json() );       // to support JSON-encoded bodies
app.use( bodyParser.urlencoded() ); // to support URL-encoded bodies

var port = Number(process.env.PORT || 5000);

var server = http.createServer(app).listen(port, function() {
  console.log("Listening on " + port);
});

                
var io = ios.listen(server);

app.get('/', function(req, res){
  res.sendfile('index.html');
});

app.post('/sendEmail', function(req, res){

  var smtpTransport = nodemailer.createTransport("SMTP",{
    service: "Gmail",
    auth: {
        user: "iamrohitx@gmail.com",
        pass: "XYZ"
    }
  });
   var mailOptions = {
    from: "Iamchat ✔ <hi@iamrohit.in>", // sender address
    to: "hi@iamrohit.in", // list of receivers
    subject: "Iamchat Feedback ✔", // Subject line
    //text: "Hello world ✔", // plaintext body
    html: "<b>"+req.body.feedback+"</b>" // html body
   } 
   
   smtpTransport.sendMail(mailOptions, function(error, response){
    if(error){
        res.send("Feedback could not send due to error: "+error);
    }else{
        res.send("Thanks! Feedback successfully sent!");
    }

  });
});


//current date and time of any country!
function currentDateTime(city, offset) {
    // create Date object for current location
    d = new Date();
   
    // convert to msec
    // add local time zone offset
    // get UTC time in msec
    utc = d.getTime() + (d.getTimezoneOffset() * 60000);
   
    // create new Date object for different city
    // using supplied offset
    currentdate = new Date(utc + (3600000*offset));
   
    // return time as a string
    
    var datetime =  currentdate.getDate() + "/"
                    + (currentdate.getMonth()+1)  + "/" 
                    + currentdate.getFullYear() + " @ "  
                    + currentdate.getHours() + ":"  
                    + currentdate.getMinutes() + ":" 
                    + currentdate.getSeconds(); 
                    return datetime;
                                  
}



  

 io.sockets.on('connection', function(socket){
   /*
   * Vlidate user id duplicate
   */
     socket.on('chkUser',function(data) { 
         var chk = users.indexOf(data.name);
          if(chk==(-1)) {
          var curdatetime = currentDateTime('India','5.5');
          users.push(data.name); 
          var data = {name:data.name, msg:' joined chat on '+curdatetime+' !', color:'text-success'};
          usersActivity.push(data);
          onlineClient[data.name] = socket; 
          }
         socket.emit("chkUser", chk);   
     }); 
     
  socket.on('joined',function(data) { 
  var curdatetime = currentDateTime('India','5.5');
     socket.username = data.name;
     io.sockets.emit('totalOnlineUser',users, socket.username);
     socket.emit("myInfo",socket.username, curdatetime);
     io.sockets.emit('newOne',data, messages);  
     io.sockets.emit('usersActivity',usersActivity, curdatetime);       
  });
  
  socket.on("chatMsg",function(data) { 
   var curdatetime = currentDateTime('India','5.5');
   var data = { name: socket.username+" ["+curdatetime+"] ", msg: data.msg}
     messages.push(data);
     io.sockets.emit("msgEveryOne", data, curdatetime); 
      
  });
  
  socket.on('disconnect', function(data){
  
   var curdatetime = currentDateTime('India','5.5');
    if(socket.username != undefined) {
      var ax= users.indexOf(socket.username);
      users.splice(ax, 1);
      io.sockets.emit('totalOnlineUser', users, socket.username); 
      data = {name:socket.username,msg:" left chat on "+curdatetime+" !" ,color:"text-danger"}
      usersActivity.push(data);
      
      io.sockets.emit('usersActivity',usersActivity, curdatetime);
      socket.emit('usersDisconnect');
      //socket.emit("disconnect",{});
      }
    });
  
    
  socket.on("typing", function(data) {
     io.sockets.emit("isTyping",{isTyping:data,user:socket.username});
  });
  
  socket.on('dateTimeUpdate',function(data) {
   socket.datetime = data.datatime;
  });
  ////// Create room /////
  socket.on('sendPrivateChat',function(data) {
  var socketTo = onlineClient[data.toName];
  var socketFrom = onlineClient[data.fromName];
  var group = 'private';
  socketTo.join(group);  //create room
  socketFrom.join(group);
    //io.sockets.in(data.name).emit('privateChat', data);    
    socketTo.emit('privateChat', data);
    socketFrom.emit('privateChat', data);   
  });
  
  
  
socket.on('sendprivatechat', function(key, msg){
var clientSocket = onlineClient[key];
if(clientSocket == null){
}else{
clientSocket.emit('getprivatemsg', socket.username, key, msg);
}
});

});