Unfinished nasty code for extreme startup

finn-extreme-startup.js

// My nasty code for extreme startup
// https://github.com/magnars/norsk-extreme-startup

var http = require('http');
var ip = "192.168.42.56";
var products = {
    "epler": {
        price: 5
    },
    "bananer": {
        price: 3
    }
};

var answers = [
    answer(/%20hva%20heter%20laget%20deres/, function() {
        return "Gregers (node)";
    }),
    answer(/%20hva%20er%20(\d+)%20pluss%20(\d+)/, function(s1, s2) {
        console.log("hva er x + y", s1 ,s2);
        return parseInt(s1, 10) + parseInt(s2, 10);
    }),
    answer(/%20hvilket%20av%20disse%20tallene%20er%20storst:%20(\d+),%20(\d+)/, function(s1, s2) {
        console.log("hva er størst", s1, s2);
        return Math.max(parseInt(s1, 10), parseInt(s2, 10));
    }),
    answer(/%20mitt%20navn%20er%20(\w+).%20hva%20heter%20jeg/, function(name) {
        console.log("Hva heter jeg", name);
        return name;
    }),
    answer(/hvilken%20myntenhet%20brukte%20Italia%20tidligere/, function() {
        return "lire";
    }),
    answer(/hva%20er%20det%20(\d+).%20nummeret%20i%20Fibonaccirekken/, function(n) {
        return (function fib(i, n1, n2) {
          if(i==0) return n1;
          return fib(i-1, n2, n1+n2);
        })(n, 0, 1);
    }),
    answer(/hvilke%20produkter%20har%20du%20til%20salgs%20\(kommaseparert\)/, function() {
        var ret = [];
        for(var key in products) {
            if(!products.hasOwnProperty(key)) continue;
            ret.push(key);
        }
        /*products.forEach(function(p) {
            ret.push(p.name);
        });*/
        return ret.join(",");
    }),
    /*answer(/hvor%20mange%20kroner%20koster/, function() {
        var match = this.url.match(/(koster%20(.*)%20stykk%20(\w+))/);
        var antall = textToNum(match[2]),
            prodname = match[3];

        // %20ett%20stykk%20epler
        return ret;
    }),*/
    answer(/hva%20er%20(\d+)%20ganget%20med%20(\d+)/, function(s1, s2) {
        return parseInt(s1, 10) * parseInt(s2, 10);
    }),
    answer(/hvilke%20av%20disse%20tallene%20er%20primtall:%20/, function() {
        var nums = getNubers(this.url);
        var ret = [];
        for(var i=0, l=nums.length; i<l; i++) {
            if(isPrime(nums[i])) ret.push(nums[i]);
        }
    }),
    answer(/hva%20er%20(\d+)%20delt%20med%20(\d+)/, function(s1, s2) {
        return parseInt(s1, 10) / parseInt(s2, 10);
    }),
    answer(/hva%20er%20(\d+)%20minus%20(\d+)/, function(s1, s2) {
        return parseInt(s1, 10) - parseInt(s2, 10);
    }),
    answer(/hva%20er%20(\d+)%20ganget%20med%20(\d+)%20pluss%20(\d+)/, function(s1, s2, s3) {
        console.log(this.url);
        return parseInt(s1, 10) * parseInt(s2, 10) + parseInt(s3, 10);
    }),
    answer(/hvilke%20av%20disse%20tallene%20har%20heltalls%20kvadratrot%20og%20kubikkrot:%20(\d+),%20(\d+)/, function(s1, s2) {
        var n1 = parseInt(s1, 10), n2 = parseInt(s2, 10);
    }),
    answer(/%20hva%20heter%20jeg/, function() {
        return "Magnar";
    })
];

http.createServer(function (req, res) {
    for(var key in req) {
        printKey(key, req[key]);
    }
    
    var answer = question(req, res);
  
    if(answer) {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        console.log("Answer: " + answer);
        res.end(answer.toString());
    } else {
        res.writeHead(404, {'Content-Type': 'text/plain'});
        res.end("Not found");
        console.log("UNKNOWN QUESTION: " + req.url);
    }
    
}).listen(1337, ip);

function printKey(key, obj) {
    var type = typeof obj,
        value;
    if(key != "url") return;
    if(type == "function") {
        value =  obj.toString().replace("\n", "").slice(0,20)+"...";
    } else if(type == "object") {
        value =  "[object]";
    } else {
        value = obj;
    }
    
    console.log(key + ": " + value);
}

function question(req, res) {
    var url = req.url, match;
    
    var a;
    for(var i=0,l=answers.length; i<l; i++) {
        a = answers[i];
        if(a.testQ(url)) {
            return a.answer(url);
        }
    }
    
    return null;
}

function answer(reg, f) {
    return {
        regex: reg,
        testQ: function(str) {
            return reg.test(str);
        },
        answer: function(str) {
            var match = str.match(reg);
            var url = match.shift();
            this.url = url;
            return f.apply(this, match);
        }
    };
}

function product(name) {
    return {
        name: name
    }
}

function textToNum(str) {
    if(!isNaN(parseInt(str, 10))) {
        return parseInt(str, 10);
    } else if(str == "ett") {
        return 1;
    }
    console.log("UNKNOWN TEXT NUMBER: " + str);
    return 0;
}

function getNubers(str) {
    var parts = str.split(":");
    var last = parts[parts.length - 1];
    return last.replace("%20", "").split(",");
}

function isPrime(num) {
    if(typeof num == "string") num = parseInt(num, 10);
    for(var i = num; i>1; i--) {
        if(num % i == 0) return false;
    }
    return true;
}

console.log('Server running at http://'+ip+':1337/');