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server.js
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server.js
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const fs = require('fs');
const app = require('express')();
const http = require('http').Server(app);
const io = require('socket.io')(http);
const dgram = require('dgram');
global.samplePath = __dirname + '/samples';
function Socket () {
const loadSamples = () => {
fs.readdir(global.samplePath, (err, items) => {
if (err) throw err;
if (items.includes('default.gull')) {
openFile(`${global.samplePath}/default.gull`)
}
io.send({ type: 'filechange', files: items, path: global.samplePath});
});
};
const requestSave = (filename) => {
io.send({ type: 'saveFile', filename});
}
const openFile = (filename) => {
fs.readFile(filename, {encoding: 'utf-8'}, (err,data) => {
if (err) throw err;
io.send({ type: 'openFile', filename, data})
})
};
// socket io setup
app.get('/', function(req, res){
res.send('');
});
io.on('connection', function(socket){
console.log('a user connected');
loadSamples();
socket.on('saveData', function({filename, data}) {
fs.writeFile(filename, data, (err) => {
if (err) {
console.error('issue while saving', err)
}
})
})
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
// TODO: reimplement sample reload with new dynamic path
// watch for sample changes and send to client for reload
// fs.watch(path, {persistent: true}, loadSamples);
return {
io,
loadSamples,
requestSave,
openFile
};
}
// UDP listener
function Listener (socket) {
this.server = dgram.createSocket('udp4')
this.server.on('message', (msg, rinfo) => {
const message = msg.toString('utf-8');
if (message.startsWith('ED')) {
socket.io.send({ type: 'edit', msg: message.substring(2)})
} else {
socket.io.send({ type: 'trig', msg: message });
}
})
this.server.on('listening', () => {
const address = this.server.address()
console.log(`Server listening for UDP:\n ${address.address}:${address.port}`)
})
this.server.on('error', (err) => {
console.log(`Server error:\n ${err.stack}`)
server.close()
})
this.server.bind(49161) // TODO - make this configurable
}
global.socket = Socket();
Listener(global.socket);