chat


node socket.io+jade



$ express chat
$ cd chat
$ npm install
$ npm install --save socket.io
$ vim views/layout.jade
script(src='/socket.io/socket.io.js')

in client javascript console
socket = io.connect('http://localhost:3000')
--------------------
To send message
$ vim views/layout.jade
    script(src='/socket.io/socket.io.js')
    script(type='text/javascript').
        socket = io.connect('http://localhost:3000')
        socket.on('entrance', function(data){
            document.write('<p>'+data.message+'</p>');
        });
        socket.on('exit', function(data){
            document.write('<p>'+data.message+'</p>');
        });



$ vim ./bin/www.js 
var io = require('socket.io')

var server = app.listen(.........

var chatroom = io.listen(server);
chatroom.sockets.on('connection', function(socket){ //socket.io's event 
    socket.emit('entrance', {message:'Welcome to chat!'}); // our own event given to specific socket
    chatroom.sockets.emit('entrance', {message:'A new chatter is online.'});  // given to all sockets
    socket.on('disconnect', function(){
        chatroom.sockets.emit('exit', {message:'A chatter disappeared!'});
    })
});

every time a new client comes in a new paragraph is added

To pass texts
        socket.on('chat', function(data){
            document.write('<p>'+data.message+'</p>');
        });  

    socket.on('chat', function(data){
        chatroom.sockets.emit('chat', {message:'# '+data.message});
    })

then in dev tools 
socket.emit('chat',{message:'hola!'})

To have a dynamic interface just copy and paste index.html and jquery to public directory
<html>
<head>
<script src="http://localhost:3000/socket.io/socket.io.js"></script>
<script src="jquery-1.7.2.min.js"></script>
<script type="text/javascript" charset="utf-8">
jQuery(document).ready(function () {
    var log_chat_message = function  (message) {
        var li = jQuery('<li />').text(message);
        jQuery('#chat_log').append(li);
    };

    var socket = io.connect('http://localhost:3000');

    socket.on('entrance', function  (data) {
        log_chat_message(data.message);
    });

    socket.on('exit', function  (data) {
        log_chat_message(data.message);
    });

    socket.on('chat', function  (data) {
        log_chat_message(data.message);
    });

    jQuery('#chat_box').keypress(function (event) {
        if (event.which == 13) {
            socket.emit('chat', {message: jQuery('#chat_box').val()});
            jQuery('#chat_box').val('');
        }
    });
});

</script>
<style type="text/css" media="screen">
    div#chatroom {
        display: block;
        height: 300px;
        border: 1px solid #999;
        overflow: auto;
        width: 100%;
        margin-bottom: 10px;
        position: relative;
    }

    ul#chat_log {
        list-style: none;
        position: absolute;
        bottom: 0px;
    }

    input#chat_box {
        width: 99%;
    }
</style>
</head>
<body>

    <div id="chatroom">
        <ul id="chat_log">
        </ul>
    </div>

    <input type="text" name="chat_box" value="" id="chat_box" placeholder="type to chat..." />

</body>
</html>

instead of just logging you can format by color or bold based on kind of message

make this chat system as a module
 chatter module
 user of chatter module
 var all_sockets = null;

exports.set_sockets = function  (sockets) {
  all_sockets = sockets;
};

exports.connect_chatter = function  (config) {

  config.socket.emit('entrance', {message: 'Welcome to the chat room!'});
  all_sockets.emit('entrance', {message: config.username + ' is online.'});

  config.socket.on('disconnect', function  () {
    all_sockets.emit('exit', {message: config.username + ' has disconnected.'});
  });

  config.socket.on('chat', function  (data) {
    all_sockets.emit('chat', {message: config.username + ' says: ' + data.message});
  });
};

exports.failure = function  (socket) {
  socket.emit('error', {message: 'Please log in to the chatroom.'});
};
 var io = require('socket.io'),
  connect = require('connect'),
  chatter = require('chatter');

var app = connect().use(connect.static('public')).listen(3000);
var chat_room = io.listen(app);

chatter.set_sockets(chat_room.sockets);

chat_room.sockets.on('connection', function (socket) {
  chatter.connect_chatter({
    socket: socket,
    username: socket.id
  });
});


integrating node with wordpress, drupal, jumla to use their authorization, .... to add chat there
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