app.js

var io  = require('socket.io'),
	graph = require('fbgraph'),
	unirest = require('unirest'),
	server = io.listen(1337);

server.sockets.on('connection', function(socket) {  
    
    // Users enroll on client-side by auth'ing to FB
    socket.on('enroll', function(data) {
    	graph.setAccessToken(data.token);
    	graph.get("me", function(err,resp) {
    		try {
    			server.sockets.socket(socket.id).json.send({username: resp.username});
    		}
    		catch(err){ 
    			console.log("\t" + err);
    		}
    	});
    	
    	graph.get("me/music", function(err, res) {

			var artists = [];

		  	try {
			  	for (var i = 0; i < res.data.length; i++){
					var name = res.data[i].name;
					artists.push(name);
				}
		  	}
		  	catch(err) {
		  		console.log("    info  -  \t" + err);
		  	}

			unirest.post('http://localhost:2403/user')
		   		.headers({ 'Accept': 'application/json' })
			    .send(
			  	{ 
			  		"username" : data.id,
			  		"password" : "0000",
			  	 	"friends"  : {},
			  	 	"artists"  : artists 
			  	})
			    .end(function (response) {
			  		console.log("   info  -  Successfully stored a users liked musicians");
			});

			//server.sockets.socket(socket.id).json.send({your:data.id});
		});
    });

    socket.on('friends', function(data) {

    	graph.setAccessToken(data.token);

    	var friend = {
    		username: data.friends.friends[i].username,
    		musicians: music
		};

    	for(var i = 0; data.friends.friends.length > 0; i++) {
	    	var music = [];

	    	try {

		    	graph.get(data.friends.friends[i].username + "/music", function(err, respo) {

			  	for (var i = 0; i < respo.data.length; i++) {
					var name = respo.data[i].name;
					music.push(name);
				}
		  	  	});
	    	}
	    	catch(err){
	    		console.log("nä");
	    	}
		}

		console.log(friend);

    	/*unirest.post('http://localhost:2403/user/' + data.id)
		  .headers({ 'Accept': 'application/json' })
		  .send(
		  	{ 
		  	 	"friends"  : friends
		  	})
		  .end(function (response) {
		  	console.log(response.body);
		});*/
    });

});