AAEO.io/index.js

var express = require('express');
var app = express();
var http = require('http').createServer(app);
var io = require('socket.io')(http);
var path = require('path');

var buffer = {};
var users = {};
var publicpath = path.join(__dirname, '/views');
app.use('/', express.static(publicpath));

app.get('/', (req, res) => {
    res.sendFile(__dirname + '/views/index.html');
});

io.on('connection', (socket) => {
    console.log('Nutzer verbunden!');
    userConnected(socket.id);

    socket.on('disconnect', () => {
        console.log(socket.id, 'Nutzer verbindung unterbrochen');
        socket.broadcast.emit('cursor_remove', { id: socket.id });
        userDisconnected(socket.id);
    });

    socket.on('cursor_pos', function (data) {
        if (buffer[data.id] == null) {
            buffer[data.id] = data.pos;
        }

        if (data.pos.x != buffer[data.id].x) {
            socket.broadcast.emit('cursor_draw', { pos: data.pos, id: data.id });
            buffer[data.id] = data.pos;
        }
    });

    socket.on('nickname', function (data) {
        socket.broadcast.emit('nickname_set', { name: data, id: socket.id });
    });
});

function userConnected(id) {
    users[id] = {
        Name: "unnamed",
        Points: 0
    };
    console.log("Add " + id);


};

function userDisconnected(id) {
    delete users[id];
    console.log("Remove " + id);
};



http.listen(1234, () => {
    console.log("up and run on port 1234");
});