play chess with socket.io and uci - node.js

Question

I want to create a webapp where you can play against a UCI-Chessengine. I found https://github.com/imor/uci which works nice on commandline. So I "only" need a websocket to evaluate the moves.
But I'm not able to get it running... I tried (based on the uci-example):
io.sockets.on('connection',function(socket){
socket.on('start', function(data) {
var uci = new UCI();
var game = new Chess();
uci.on('ready', function () {
//Start a new 10 minute game with engine as black, use the first found
//engine and the first found polyglot book
uci.startNewGame(uci.getAvailableEngines()[0], 'black', 10,
uci.getAvailableBooks()[0]);
}).on('newgame', function () {
console.log("A new 10 minute game has started.");
console.log("Enter your moves in algebraic notation. E.g. e2e4<Enter>");
console.log(game.ascii());
}).on('moved', function (move) {
game.move(move);
console.log(move.from + move.to + (move.promotion ? move.promotion : ''));
console.log(game.ascii());
}).on('error', function (message) {
console.log('Error:' + message);
}).on('exit', function (message) {
console.log('Exiting:' + message);
}).on('gameends', function (result, reason) {
console.log('Game ends with result ' + result + ' because ' + reason);
uci.shutdown();
process.exit();
});
})
socket.on('m',function(data){
uci.move(data.move);
});
});
Starting the game is working: socket.emit('start',{"bar":"foo"})
but when I try to make a move with socket.emit('m':"e2e4") it does not know the uci.move
That's okay cause it's defined within socket.on('start')... so he can't know it, but I'm not able to get it running. I've tried some stupid ideas, for example putting the socket.on('m') into the socket.on('start')...
Can somebody help me with this? How can I send moves to the created uci-connection? Or is this not possible?
Thank you very much.

Answer 1

Try moving the var uci up in the scope hierarchy.
io.sockets.on('connection',function(socket){
var uci;
socket.on('start', function(data) {
uci = new UCI();
var game = new Chess();
...
})
socket.on('m',function(data){
uci.move(data.move);
});
});