gistfile1.js

socket.on('status', function(status){
    // ...

    if(status.intrusion){
        takeSnapShotAndCompareTo('me@WorkmateProtection');
    }
});


function takeSnapShotAndCompareTo(tag, done){
    var file;
    var fileName;

    async.waterfall([
        // Take a picture with the webcam
        function(callback){
            takeSnapShot(callback);
        },

        // Resize snapshot
        function(snapShotRslt, stderr, callback){
            file = snapShotRslt.trim().split('...').pop();
            fileName = file.split('/').pop();

            // Resize file
            imagemagick.resize({
                srcPath: file,
                dstPath: file,
                width:   512
            }, callback);
        },

        // Upload image
        function(stdin, stdout, callback){
            upload(file, callback);
        },

        // Recognize it
        function(stdout, stderr, callback){
            getMatchValue('http://my-server/'+fileName, tag, callback)
        },

        // Handle result
        function(result, callback){
            if(result < 50){
                sendSMS(done);
            }

            if(done){
                done()
            }
        }
    ], function(err, rslt){
        if(err){
            console.log('Err : '+err);
            return;
        }
    });
}

// Take a snapshow via imagesnap
function takeSnapShot(cb){
    var now = new Date();

    exec('imagesnap ~/Desktop/photo-'+now.getTime()+'.jpg', cb);
}

// Upload a picture to the public dir of the server
function upload(file, cb){
    exec('scp -i ~/.ssh/myPem.pem '+file+' user@my-server:/var/app/public', cb);
}

function getMatchValue(url, tag, cb){
    var apiURL = 'http://api.skybiometry.com/fc/faces/recognize.json?api_key='+config.skybiometry.key+'&api_secret='+config.skybiometry.secret+'&uids='+tag+'&urls='+url+'&attributes=all';

    http.get(apiURL, function(res){
    content = '';

    res.on('data', function(chunk){
        content += chunk;
    });

    res.on('end', function(){
        content = JSON.parse(content);

        // Nobody found : return 0
        if(content.photos[0].tags == undefined || content.photos[0].tags.length == 0 || content.photos[0].tags[0].uids.length == 0){
            return cb(null, 0);
        }

        // Return the ratio of similarity
        cb(null, content.photos[0].tags[0].uids[0].confidence);
        })
    })
    .on('error', cb);
}