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server.js
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server.js
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#!/bin/env node
// OpenShift sample Node application
var express = require('express');
var fs = require('fs');
var io = require('socket.io');
/**
* Define the sample application.
*/
var SampleApp = function() {
// Scope.
var self = this;
var onlineUsers =[];
/* ================================================================ */
/* Helper functions. */
/* ================================================================ */
/**
* Set up server IP address and port # using env variables/defaults.
*/
self.setupVariables = function() {
// Set the environment variables we need.
self.ipaddress = '0.0.0.0';
self.port = 8080;
if (typeof self.ipaddress === "undefined") {
// Log errors on OpenShift but continue w/ 127.0.0.1 - this
// allows us to run/test the app locally.
console.warn('No OPENSHIFT_NODEJS_IP var, using 127.0.0.1');
self.ipaddress = "127.0.0.1";
};
};
/**
* Populate the cache.
*/
self.populateCache = function() {
if (typeof self.zcache === "undefined") {
self.zcache = { 'index.html': '' };
}
// Local cache for static content.
self.zcache['index.html'] = fs.readFileSync('./index.html');
};
/**
* Retrieve entry (content) from cache.
* @param {string} key Key identifying content to retrieve from cache.
*/
self.cache_get = function(key) { return self.zcache[key]; };
/**
* terminator === the termination handler
* Terminate server on receipt of the specified signal.
* @param {string} sig Signal to terminate on.
*/
self.terminator = function(sig){
if (typeof sig === "string") {
console.log('%s: Received %s - terminating sample app ...',
Date(Date.now()), sig);
process.exit(1);
}
console.log('%s: Node server stopped.', Date(Date.now()) );
};
/**
* Setup termination handlers (for exit and a list of signals).
*/
self.setupTerminationHandlers = function(){
// Process on exit and signals.
process.on('exit', function() { self.terminator(); });
// Removed 'SIGPIPE' from the list - bugz 852598.
['SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGILL', 'SIGTRAP', 'SIGABRT',
'SIGBUS', 'SIGFPE', 'SIGUSR1', 'SIGSEGV', 'SIGUSR2', 'SIGTERM'
].forEach(function(element, index, array) {
process.on(element, function() { self.terminator(element); });
});
};
/* ================================================================ */
/* App server functions (main app logic here). */
/* ================================================================ */
/**
* Create the routing table entries + handlers for the application.
*/
self.createRoutes = function() {
self.routes = { };
self.routes['/asciimo'] = function(req, res) {
var link = "http://i.imgur.com/kmbjB.png";
res.send("<html><body><img src='" + link + "'></body></html>");
};
self.routes['/'] = function(req, res) {
res.setHeader('Content-Type', 'text/html');
res.send(self.cache_get('index.html') );
};
};
/**
* Initialize the server (express) and create the routes and register
* the handlers.
*/
self.initializeServer = function() {
self.createRoutes();
self.app = express();
// Add handlers for the app (from the routes).
for (var r in self.routes) {
self.app.get(r, self.routes[r]);
}
};
/**
* Initializes the sample application.
*/
self.initialize = function() {
self.setupVariables();
self.populateCache();
self.setupTerminationHandlers();
// Create the express server and routes.
self.initializeServer();
};
self.startServer = function() {
self.server = self.app.listen(self.port, self.ipaddress, function() {
console.log('%s: Node server started on %s:%d ...',
Date(Date.now() ), self.ipaddress, self.port);
});
}
self.startWebSocket = function() {
var checkName = function(input) {
if(onlineUsers.indexOf(input, 0) == "-1") {
return false;
}
else
return true;
};
self.io = io.listen(self.server);
self.io.on('connection', function(socket){
console.log('a user connected');
var time = new Date();
socket.on('tryName',function(name) {
name = name.substring(0,8).trim();
if(name === "") {
socket.emit('tryNameResult', false);
return false;
}
if(!checkName(name) && typeof(socket.username) == "undefined") {
var time = new Date();
onlineUsers.push(name);
socket.username = name;
var hours = 0;
if(time.getHours()+13 > 24)
hours = time.getHours()+13 - 24;
else
hours = time.getHours()+13;
self.io.emit('chat message',name + ' entered the chatroom (' + hours+":"+time.getMinutes()+")");
socket.emit('tryNameResult', true);
socket.on('chat message', function(msg, users){
var time = new Date();
if(msg !== "") {
var hours = 0;
if(time.getHours()+13 > 24)
hours = time.getHours()+13 - 24;
else
hours = time.getHours()+13;
if(users.length > 0) {
var connected = self.io.sockets.connected;
var whisperResponse = "";
for(var i = 0;i < users.length; i++) {
for(var id in connected) {
if(connected[id].username == users[i] && connected[id].username != socket.username)
{
connected[id].emit('chat message', socket.username + " whispers to you : " + msg);
if(whisperResponse !== "")
whisperResponse += ", ";
whisperResponse += connected[id].username;
}
}
}
socket.emit('chat message', "You whisper to " + whisperResponse + " : " + msg);
}
else
self.io.emit('chat message',socket.username + ' : ' + msg + ' (' + hours +':'+time.getMinutes()+')');
}
});
socket.on('disconnect', function(){
if(typeof(socket.username) !== "undefined") {
var time = new Date();
var hours = 0;
if(time.getHours()+13 > 24)
hours = time.getHours()+13 - 24;
else
hours = time.getHours()+13;
var tempIndex = onlineUsers.indexOf(socket.username,0);
onlineUsers.splice(tempIndex,1);
self.io.emit('onlineUsers', onlineUsers);
self.io.emit('chat message',socket.username + ' leaved the chatroom ('+ hours+':'+time.getMinutes()+')');
}
console.log(socket.username + ' disconnected');
});
self.io.emit('onlineUsers', onlineUsers);
}
else {
socket.emit('tryNameResult', false);
}
});
});
}
/**
* Start the server (starts up the sample application).
*/
self.start = function() {
// Start the app on the specific interface (and port).
self.startServer();
self.startWebSocket();
};
}; /* Sample Application. */
/**
* main(): Main code.
*/
var zapp = new SampleApp();
zapp.initialize();
zapp.start();