Making tea

tea.sh

#!/usr/local/bin/node

function Mug() {
};

Mug.prototype.drink = {};
Mug.prototype.TEA_COLD_TIME = 6000;
Mug.prototype.TEABAG_BREW_TIME = 2000;

Mug.prototype.on = function(call, event) {
    if (!Mug.prototype.events) {
        Mug.prototype.events = [];
    }
    Mug.prototype.events[call] = event;
};

Mug.prototype.emit = function(call) {
    console.log("Event fired: " + call);
    if (!Mug.prototype.events[call]) {
        console.log("I don't know that event!");
        return;
    }
    console.log("'" + call + "' event happened");
    Mug.prototype.events[call].call();
};

Mug.prototype.fill = function(drink) {
    thirstQuencher = drink.call();
    this.drink = thirstQuencher;
    console.log("Mug filled with some " + thirstQuencher.name);
console.log(this.TEA_COLD_TIME);
};

Mug.prototype.hasMilk = false;
Mug.prototype.sugarCount = 0;

mug = new Mug();

mug.on("empty", function() {
    console.log("Oh dear, mug is empty!");
    drink = function() {
        water = { temperature: '100'};
        teabag = setTimeout(function() { console.log("Removing teabag"); return teabag; }, this.TEABAG_BREW_TIME);
        extras = {};
        if (this.hasMilk) extras.milk = true;
        if (this.sugarCount > 0) extras.sugar = sugarCount;
        return {'name': 'tea', 'water':water, 'main':teabag, 'extra':extras };
    }
    mug.fill(drink);
});
mug.on("cold", function() {
    console.log("Damn fool you let your " + this.drink.name + " go cold!");
});

setTimeout(function() {
    console.log("I'm drinking tea");
    mug.emit('empty');
    setTimeout(function() { mug.emit("cold"); }, this.TEA_COLD_TIME);
}, 3000);