gistfile1.js

var exitDetected        = 0;
var senseiDetected      = 0;
var doorOpened          = 0;
var existStatusInterval = 0;

app.post('/door-open', function (req, res) {
    doorOpened = 1;
    existStatusInterval = setTimeout(setExitStatus, 5000);

    dispatchInfos();
    res.send();
});

app.post('/detect', function (req, res) {
    clearTimeout(existStatusInterval);

    if(doorOpened){
        senseiDetected = 1;
    }

    doorOpened = 0;

    dispatchInfos();
});

function setExitStatus(){
    exitDetected = 1;

    dispatchInfos();
}

function dispatchInfos(){
    if (!currentSocket) {
        return;
    }

    currentSocket.emit('status', {
        sensei : senseiDetected,
        exit: exitDetected
    });

    exitDetected = 0;
    senseiDetected = 0;
}