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chatty-server.js
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chatty-server.js
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/*
* Chatty chat server with irc like commands
*
* Developed by anders @ kaerus com.
* MIT licensed, feel free to use, share and modify.
*
* Copyright (c) 2012 <anders@kaerus.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs')
, url = require('url')
, util = require('util')
, path = require('path')
, extend = require('node.extend')
, arango = require('arango.client')
, template = require('./lib/template')
, config = {
_config: { "app": "chatty",
"name": "Chatty server",
"version": "0.1.2"
},
show_help: function(){
console.log("Command line options:","arguments --server <hostname:port | socket>" +
" --template <html template>");
process.exit(0);
},
get: function(conf){
this._config.file = conf;
/* parse command line options */
for( var i = 0, option = process.argv; option[i]; i++) {
switch(option[i]) {
case '--help':
this.show_help();
break;
case '--server':
this._config.server = option[++i];
break;
case '--port':
this._config.listen = option[++i];
break;
case '--template':
this._config.template = option[++i];
break;
case '--config':
this._config.file = option[++i];
break;
}
}
try {
extend(this._config,JSON.parse(fs.readFileSync(this._config.file, 'utf8')));
} catch(err) {
if(process.argv.length < 3){
console.log(err);
this.show_help();
}
}
return this._config;
}
}.get('chatty.json');
process.on('exit', function(code,signal){
console.log("Process uptime %s, exit",process.uptime(), code ? code : "", signal ? signal : "" );
});
console.log("%s configuration:\n", config.name,util.inspect(config) );
var layout = template.loadTemplate(config.template);
var banner = "<!--\n";
banner += " Chatty-client v" + config.version + " Copyright (c) Kaerus 2012, by Anders Elo <anders @ kaerus com>.\n";
banner += " MIT licensed, feel free to use, share and modify as long as this notice is included.\n";
banner += " Developers and users should send contributions to <http://github.com/kaerus/chatty>.\n";
banner += "-->\n";
var db = new arango.Connection(config.db);
console.log("Waiting for requests on %s", config.server);
if(fs.existsSync(config.server)) {
app.listen(config.server);
} else {
var srv = config.server.split(':');
app.listen(srv[1],srv[0]);
}
function handler (req, res) {
var u = url.parse(req.url,true);
var filePath = './public' + u.pathname;
var extname = path.extname(filePath) || "";
var contentType = 'text/html';
switch (extname) {
case '.js':
contentType = 'text/javascript';
break;
case '.css':
contentType = 'text/css';
break;
case '.svg':
contentType = 'image/svg+xml';
break;
case '.gif':
contentType = 'image/gif';
break;
case '.png':
contentType = 'image/png';
break;
case '.aiff':
contentType = 'audio/mpeg';
break;
case '.mp3':
contentType = 'audio/mp3';
break;
}
if(filePath === './public/') {
res.writeHead(200);
res.end(banner + layout());
} else {
fs.exists(filePath, function(exists) {
if (exists) {
fs.readFile(filePath, function(error, content) {
if (error) {
res.writeHead(500);
res.end();
}
else {
res.writeHead(200,{"Content-Type":contentType });
res.end(content);
}
});
} else {
res.writeHead(404);
res.end("not found");
}
});
}
}
var names = {};
function storeMessage(timestamp,name,msg,type){
var data = {ch: "",timestamp:timestamp,name:name,msg:msg,type:type};
db.document.create(data,function(err,ret){
if(err) console.log("Store error:", util.inspect(ret) );
});
}
function broadcast(msg,timestamp,name,data,type){
this.broadcast.emit(msg,timestamp,name,data,type);
storeMessage(timestamp,name,data,type);
}
io.sockets.on('connection', function (socket) {
var server_msg = config.name +' v '+ config.version;
socket.emit('server', server_msg);
socket.on('disconnect', function() {
var name = socket.store.data.nickname;
var timestamp = new Date().getTime();
delete names[name];
socket.broadcast.emit('user disconnected',timestamp,name);
});
socket.on('set nickname', function (n) {
/* escape the name */
var timestamp = new Date().getTime()
, name = escape(n);
if(names[name]) {
if(names[name]!==socket.id)
socket.emit('nick taken',name);
} else {
socket.get('nickname',function(err,oldname){
if (oldname) socket.broadcast.emit("user changed nick", timestamp, oldname, name);
else socket.broadcast.emit("user joined", timestamp, name);
socket.emit('nick ready',timestamp,name);
socket.set('nickname',name);
if(oldname) delete names[oldname];
names[name] = socket.id;
});
}
});
socket.on('msg', function (timestamp,m) {
/* escape the message */
var message = escape(m);
socket.get('nickname', function (err, name) {
var now = new Date().getTime();
if( now - 10000 < timestamp ) {
broadcast.call(socket,"msg", timestamp, name, message, "public");
socket.emit("received",timestamp);
} else {
socket.emit("discarded",timestamp);
}
});
});
/* return list of names */
socket.on('get users', function(){
socket.emit('users',Object.keys(names));
});
/* return (user) history */
socket.on('get history', function(name,count,offset){
var filter = name ? "FILTER u.name == '" + escape(name) +"'" : "";
db.post("/_api/cursor", {query: "FOR u IN @@collection " + filter +
" LIMIT " + parseInt(offset) + " , " + parseInt(count) +
" SORT u.timestamp DESC RETURN [u.timestamp,u.name,u.msg,u.type]",
bindVars: {"@collection": db.config.name}}, function(err,ret) {
if(err) console.log("db err(%s): ", err,ret);
else if(ret.result.length > 0)
socket.emit("history", ret.result);
});
});
});