exports.index = function (req, res) {
    res.render('index', { title: 'Home', status: req.flash('status') })
};

exports.db = function (req, res) {
    res.render('database', { title: 'Manage MAC', status: req.flash('status') })
};

exports.form = function (req, res) {
    var snmpMac = req.app.get('snmpMac');   //TODO: wie kann man das schoener machen?
    var mac = req.body.mac,
        label = req.body.label,
        action = req.body.action;
    var status = "";
    mac = mac.toLowerCase();

    if (/^([0-9a-f]{2}[:-]){5}([0-9a-f]{2})$/.exec(mac)) {
        if (action == "add") {
            if (/^[0-9a-zA-Z]+$/.exec(label)) {
                snmpMac.add(mac, label, function (err) {
                    console.log("add mac result: " + err);
                    req.flash('status', err == null ? "" : "database error: " + err);
                    res.redirect("/db");
                });
            } else {
                req.flash('status', 'label is invalid ("^[0-9a-zA-Z]+$")');
                res.redirect("/db");
            }
        } else if (action == "remove") {
            snmpMac.delete(mac, function (err) {
                console.log("delete mac result: " + err);
                req.flash('status', err == null ? "" : "database error: " + err);
                res.redirect("/db");
            });
        } else {
            res.redirect("/db");
        }
    } else {
        req.flash('status', 'mac address is invalid');
        res.redirect("/db");
    }
};