first of all I am total noob to NodeJS, and mostly new to the backend. So I
am learning them by creating a chat application. I've already integrated
many features but cannot implement the update of users in the user list.
I'm using socket.io for this. Here is my socket.js file.
module.exports = function (io,rooms) {
var chatrooms = io.of('/roomlist').on('connection', function(socket) {
console.log('Connection Established on the server');
socket.emit('roomupdate',JSON.stringify(rooms));
socket.on('newroom', function(data) {
rooms.push(data);
socket.broadcast.emit('roomupdate',JSON.stringify(rooms));
socket.emit('roomupdate',JSON.stringify(rooms));
});
});
var messages = io.of('/messages').on("connection", function(socket) {
console.log('connected to the chatroom!');
socket.on('joinroom', function(data) {
socket.username = data.user;
socket.userPic = data.userPic;
socket.join(data.room);
updateUsersList(data.room,true);
});
socket.on('newMessage', function(data) {
socket.broadcast.to(data.room_number).emit('messagefeed',
JSON.stringify(data));
});
function updateUsersList(room, updateALL) {
// var getUsers = io.of('/messages').clients(room); OLD VERSION
var getUsers = io.of('/messages').in(room).clients;
var userlist = [];
for (var i in getUsers) {
userlist.push({user:getUsers[i].username,
userPic:getUsers[i].userPic});
}
socket.to(room).emit('updateUsersList',JSON.stringify(userlist));
if (updateALL) {
socket.broadcast.to(room).emit('updateUsersList',
JSON.stringify(userlist));
}
}
socket.on('updateList', function(data) {
updateUsersList(data.room);
console.log('updateList triggered in socket.js');
});
});
};
And this is my room page
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>ChatCAT</title>
<link rel="stylesheet" href="../css/normalize.css" media="screen"
title="no title" charset="utf-8">
<link rel="stylesheet" href="../css/room.css" media="screen"
title="no title" charset="utf-8">
<script src="https://code.jquery.com/jquery-3.1.0.min.js";
integrity="sha256-cCueBR6CsyA4/9szpPfrX3s49M9vUU5BgtiJj06wt/s="
crossorigin="anonymous"></script>
<script src="/socket.io/socket.io.js" charset="utf-8"></script>
<script type="text/javascript">
$(function functionName() {
var host = "{{config.host}}";
var messages = io.connect(host + "/messages");
var roomNum = "{{room_number}}";
var userName = "{{user.fullname}}";
var userPic = '{{user.profilePic}}';
messages.on('connect', function(event) {
console.log('Connection Established');
messages.emit('joinroom', {room:roomNum, user:userName,
userPic:userPic})
})
$(document).on('keyup', '.newmessage', function(event) {
if (event.which === 13 && $(this).val()!='') {
messages.emit('newMessage', {
room_number:roomNum,
user:userName,
userPic:userPic,
message:$(this).val()
})
updateMessageFeed(userPic, $(this).val());
$(this).val('');
}
})
messages.on('messagefeed', function(data) {
var msgs = JSON.parse(data);
updateMessageFeed(msgs.userPic, msgs.message);
})
function updateMessageFeed(userPic, message) {
var str = "<li>";
str +='<div class="msgbox">';
str +='<div class="pic">';
str +='<img src="'+ userPic +'" />';
str +='</div>';
str +='<div class="msg">';
str +='<p>';
str +=message;
str +='</p>';
str +='</div>';
str +='</div>';
str +='</li>';
$(str).hide().prependTo($('.message')).slideDown(100,
function() {
//Stuff to do *after* the animation takes place
});
console.log(str);
}
messages.on('updateUsersList', function(data) {
var userlist = JSON.parse(data);
$('.users').html('');
for (var i = 0; i < userlist.length; i++) {
// userlist[i]
var str = '<li><img src="'+ userlist[i].userPic +'"
/><h5>'+ userlist[i].user +'</h5></li>';
$(str).prependTo($('.users'));
}
console.log(str);
})
setInterval(function () {
messages.emit('updateList',{room:roomNum});
console.log('interval');
}, 15*1000)
});
</script>
</head>
<body>
<div class="rm-container">
<h1 class="rm-title">ChatCAT</h1>
<div class="rm-userbox">
<img src="{{user.profilePic}}" class="userPic" />
<h3 class="userName">{{user.fullname}} | <a
href="/logout">Logout</a> <a href="/chatrooms">More Chatrooms</a></h3>
</div>
<div class="rm-roomname">
<h5>{{room_name}}</h5>
</div>
<div class="rm-message">
<ul class="message">
</ul>
</div>
<div class="rm-users">
<ul class="users">
</ul>
</div>
<div class="rm-newmessage">
<input type="text" class="newmessage" autocomplete="off"
placeholder="Type in your message and press enter!">
</div>
</div>
</body>
</html>
Also here is the github repository for my project.
https://github.com/hayk94/ChatCat
And the commit of this functionality.
https://github.com/hayk94/ChatCat/commit/b81f1f2d49a9789bd1bb48fd1a80c592c57dc2b0
EDIT:
After adding some cons logs it seems that the problem is in these lines of
code in socket.js
`function updateUsersList(room, updateALL) {
// var getUsers = io.of('/messages').clients(room); OLD VERSION
var getUsers = io.of('/messages').in(room).clients;
var userlist = [];
for (var i in getUsers) {
userlist.push({user:getUsers[i].username,
userPic:getUsers[i].userPic});
}
socket.to(room).emit('updateUsersList',JSON.stringify(userlist));
if (updateALL) {
socket.broadcast.to(room).emit('updateUsersList',
JSON.stringify(userlist));
console.log('updateALL triggered');
}
console.log('updateUsersList function triggered');
}`
The emit and the broadcast seems to not work. As in the room.html
`messages.on('updateUsersList', function(data) {
console.log('messages.on updateUsersList');
var userlist = JSON.parse(data);
$('.users').html('');
for (var i = 0; i < userlist.length; i++) {
// userlist[i]
var str = '<li><img src="'+ userlist[i].userPic +'" /><h5>'+
userlist[i].user +'</h5></li>';
console.log(str);
$(str).prependTo($('.users'));
}
console.log(str);
})`
The updateUsersList is not being triggered.
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