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"use strict";
/* Deps */
var http = require('http')
, path = require('path')
, connect = require('connect')
, express = require('express')
, app = express()
, logger = require('logger').createLogger('manavis.log')
, cookieParser = express.cookieParser('your secret sauce')
, sessionStore = new connect.middleware.session.MemoryStore()
;
app.configure(function () {
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(cookieParser);
app.use(express.session({ store: sessionStore }));
app.use(app.router);
app.use(express.static(__dirname + "/public"));
});
var server = http.createServer(app)
, io = require('socket.io').listen(server)
, SessionSockets = require('session.socket.io')
, sessionSockets = new SessionSockets(io, sessionStore, cookieParser)
;
/* End deps */
/* Only one level is logged, and numerical timestamps are easier to compare. */
logger.format = function(level, date, message) {
return JSON.stringify({
date: +date,
data: JSON.parse(message) /* TODO: Get rid of encoding/decoding hack (write own logger?) */
});
}
/* Number of sessions we've seen. */
var count = 0;
/* nid -> { nick, filters, channel } */
var users = {};
/* nid -> socket */
var sockets = {};
/* FIXME: Workaround to prevent logout propagating during ghosting */
var ghosting = false;
/* Auto-incrementing room count */
var channelCount = 0;
/* Channel ID -> { usernum, filters } */
var channels = {};
var logServerAction = entityLogger(0);
sessionSockets.on('connection', function (err, socket, session) {
if (!session) {
socket.disconnect();
return;
}
/*
* Don't do anything until they send a login message.
* Later versions might also check a protocol version here.
*/
/* Someone new connected. Restore or initialise their session data. */
session.nid = session.nid || (++count);
var logAction = entityLogger(session.nid);
session.nick = session.nick || null;
session.save();
if (session.nid in sockets) {
/* Ghost the old session */
ghosting = true;
sockets[session.nid].disconnect();
ghosting = false;
}
sockets[session.nid] = socket;
/* New user! */
logAction("CONNECT", { "ip": socket.handshake.address.address, "proxied-ip": socket.handshake.headers['x-forwarded-for'] });
users[session.nid] = { nick: session.nick, filters: {} };
/* Let them know of their data. */
socket.emit('selflogin', {
id: session.nid,
nick: session.nick
});
/* Let everyone else know that someone connected. */
socket.broadcast.emit('login', {
id: session.nid,
nick: session.nick
});
/* Send the new user the userlist. */
socket.emit('users', { users: users });
/* Set up various handlers for the new socket. */
socket.on('nick', function (d) {
if (!(typeof(d) == "object" && "nick" in d)) {
return;
}
/* TODO Collision checking? */
users[session.nid].nick = session.nick = d.nick;
session.save();
logAction("NICK", d.nick);
io.sockets.emit('nickset', {
id: session.nid,
nick: d.nick
});
});
socket.on('join', function(d) {
var channel;
if (d != null) {
if (!(typeof(d) == "number" && d <= channelCount)) {
return;
}
/* Join an existing channel */
channel = d;
} else {
/* Automagically create a new channel */
channel = ++channelCount;
}
logAction("JOIN", users[session.nid].channel);
if ("channel" in users[session.nid]) {
/* Leave any channel we're in */
socket.leave(users[session.nid].channel);
}
/* Inform socket.io about the channel join */
socket.join(channel);
/* Let everyone know about the channel join */
users[session.nid].channel = channel;
io.sockets.emit('join', {
id: session.nid,
channel: channel
});
/* Update the channel information */
if (channel in channels) {
/* This channel already exists. Inform the joining user of the current filters. */
socket.emit('filterset', {
id: 0, /* Server */
filters: channels[channel].filters
});
++channels[channel].usernum;
} else {
/* This channel didn't already exist, so create it and set the filters. */
channels[channel] = {
usernum: 1,
filters: users[session.nid].filters
};
}
});
socket.on('part', function() {
if (!users[session.nid].channel) {
return;
}
logAction("PART");
socket.leave(users[session.nid].channel);
if (!--channels[users[session.nid].channel].usernum) {
delete channels[users[session.nid].channel];
}
delete users[session.nid].channel;
io.sockets.emit('part', {
id: session.nid
});
});
socket.on('filter', function(d) {
if (!(typeof(d) == "object" && "filters" in d)) {
return;
}
users[session.nid].filters = d.filters;
logAction("FILTER", d.filters);
var channel = users[session.nid].channel;
if (!channel) {
return;
}
channels[channel].filters = d.filters;
socket.broadcast.to(channel).emit('filterset', {
id: session.nid,
filters: d.filters
});
});
socket.on('disconnect', function() {
if (ghosting) {
logAction("GHOSTED");
return;
}
logAction("DISCONNECT");
delete sockets[session.nid];
delete users[session.nid];
socket.broadcast.emit('logout', {
id: session.nid
});
});
});
function entityLogger(id) {
return function(action, content) {
var message = {
user:id,
action:action
};
if (arguments.length > 1) {
message.content = content;
}
logger.info(JSON.stringify(message));
}
}
logServerAction(0, "STARTUP");
server.listen(3000);
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