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joopwah.js
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joopwah.js
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// IM chat
// Binds a ROUTER socket on 5555
require('tty').setRawMode(true);
var context = require('zeromq'),
sys = require('sys'),
fs = require('fs'),
mdns = require('mdns'),
util = require('util'),
router = context.createSocket('router'),
request = context.createSocket('request'),
reply = context.createSocket('reply'),
name = process.env.NAME || process.env.USER,
connect_port = process.env.CONNECT_PORT || '5555',
serve_port = process.env.SERVE_PORT || '5555',
dmp = require('diff_match_patch')
// see if there is a server running on our local network
var browser = mdns.createBrowser('http', 'tcp');
var foundServer = false,
peers = [],
message = '',
match = null,
server = false
browser.on('serviceUp', function(info, flags) {
foundServer = true
});
browser.start();
router.identity = name
setTimeout(function(){
if(foundServer){
console.log("Connecting to server as", name, " (identities must be unique)")
router.connect("tcp://localhost:5555")
router.on('message', function(from, msg) {
var dar = new dmp.diff_match_patch();
try{
console.log(msg.toString())
var patch = JSON.parse(msg.toString())
console.log(patch)
fs.readFile('dakee.js', function(err, data){
if(err)
data = ""
console.log(patch)
var result = dar.patch_apply(patch, data)
fs.open("dakee.js", "w+", 0666, function(err, fd){
console.log(result)
buffer = new Buffer(result[0]);
fs.write(fd, buffer, 0, buffer.length)
})
});
}catch(e){
console.log(e)
}
})
router.send("towski","hey");
console.log("resume")
process.stdin.resume()
} else {
console.log("starting server", name)
var ad = mdns.createAdvertisement('http', 4321)
ad.start()
server = true
router.bind("tcp://*:5555", function() {
process.stdin.resume()
})
router.on('message', function(from, msg) {
var sender = from.toString();
console.log("Peer joined: ", sender)
if(peers.indexOf(sender) == -1){
peers.push(sender)
}
for(peer in peers){
router.send(peers[peer], sender + " " + msg.toString())
}
})
}
}, 1000)
fs.watchFile("dakee.js", function (curr, prev) {
if(curr.mtime.getTime() != prev.mtime.getTime()){
console.log("File changed, building diff")
fs.readFile('dakee.js.old', function(err, data){
var oldData;
var dar = new dmp.diff_match_patch();
if(err){
oldData = ""
}else{
oldData = data.toString();
}
var newBuffer = fs.readFileSync('dakee.js');
var patch = dar.patch_make(oldData, newBuffer.toString())
fs.open("dakee.js.old", "w+", 0666, function(err, fd){
buffer = new Buffer(newBuffer);
fs.write(fd, buffer, 0, buffer.length)
})
console.log(peers)
console.log(JSON.stringify(patch))
for(peer in peers){
router.send(peers[peer], JSON.stringify(patch))
}
})
}
});