Mirkoplusy code

$(function () {
    $('.windows8').hide();
    $('#stats').html('');

    $.ajax({
        type: 'GET',
        url: '/mirkoplusy/api/v2/init'
    });

    //Checking whether ids are passed in url
    if (/wpis\/(\d+)\/?(\d+)?/g.exec(window.location.href)) {
        if (isParameterValid(RegExp.$1) && isParameterValid(RegExp.$2)) fetchData('comment/' + RegExp.$1 + '/' + RegExp.$2);
        if (isParameterValid(RegExp.$1) && !isParameterValid(RegExp.$2)) fetchData('entry/' + RegExp.$1);
    }

    //When user presses enter we call click action
    $("body").keyup(function (event) {
        if (event.keyCode == 13) $("#btn").click();
    });
    //On click proper action should be taken
    $("#btn").click(function () {
        takeAction($("#url").val().trim());
    });
});

//Checking whether given Ids from url are valid
function isParameterValid(param) {
    return null !== param && param.length > 0 && !isNaN(param);
}

//Deciding whether url points to a comment or to an entry
function takeAction(url) {
    if (/wpis\/(\d+)(\/(?!#comment)|$)/g.exec(url)) //whether url points to a comment
        return fetchData('comment/' + RegExp.$1 + '/' + RegExp.$2);

    if (/wpis\/(\d+)\/#comment-(\d+)$/g.exec(url))  //whether url points to an entry
        return fetchData('entry/' + RegExp.$1);

    if (!isNaN(url) && url.length != 0) //when user enters id
        return fetchData('entry/' + url);

    //If not matches any of above we send following message
    $('#stats').html("Wprowadź adres lub identyfiktor");
    $('.nicks').html('');
}

//Clearing outputs and showing loading spinner
function prepareToFetch() {
    $('.windows8').show();
    $('#stats').html('');
    $('.nicks').html('');
}

//Main function, calls api
function fetchData(param) {
    prepareToFetch();

    $.ajax({
        type: 'GET',
        url: '/mirkoplusy/api/v2/' + param,
        success: function (response) {
            var data = JSON.parse(response);

            if (data.success == "ok") showStats(data); //data is valid
            else $('#stats').html(data.message); //showing errors

            $('.windows8').hide(); //hiding loading spinner
        },
        error: function () {
            $('#stats').html("Wystąpił nieprzewidziany błąd");
            $('.windows8').hide(); //hiding loading spinner
        },
        timeout: 15000
    });
}

function listVotersNames(voters) {
    var list = '';
    voters.forEach(function (name) {
        list += "<a href=\"http://wykop.pl/ludzie/" + name + "/\">" + name + "</a>, ";
    });
    return list;
}

function calcPercent(amount, votes) {
    if (votes === 0)
        return "0%";
    else
        return (Math.round(amount / votes * 100 * 100) / 100) + "%";
}

//Displaying received data in readable format
function showStats(data) {
    //setting new url address
    if (/^(.+)mirkoplusy/g.exec(window.location.href))
        window.history.pushState('', '', RegExp.$1 + 'mirkoplusy/wpis/' + data['urlToSet']);

    //setting returned url to the input; e.g. when user enters id it will change to url
    $("#url").val(data['entryUrl']);

    var voters = data['voters'];
    var votesCount = {
        'men': voters.men.length,
        'women': voters.women.length,
        'unknown': voters.unknown.length
    };
    votesCount.total = votesCount.men + votesCount.women + votesCount.unknown;

    var stats = "<p>" + data.author + "</p>";
    stats += "<p>Liczba plusów: " + votesCount.total + "</p>";
    stats += "<p>Niebieskich pasków: " + votesCount.men + ", " + calcPercent(votesCount.men, votesCount.total) + "</p>";
    stats += "<p>Różowych pasków: " + votesCount.women + ", " + calcPercent(votesCount.women, votesCount.total) + "</p>";
    stats += "<p>Niezdefiniowanych: " + votesCount.unknown + ", " + calcPercent(votesCount.unknown, votesCount.total) + "</p>";
    $("#stats").html(stats);

    if (voters.men.length > 0) {
        var men = "<p>Niebiescy:<br>" + listVotersNames(voters.men) + "</p>";
        $("#men").html(men);
    }
    if (voters.women.length > 0) {
        var women = "<p>Różowe:<br>" + listVotersNames(voters.women) + "</p>";
        $("#women").html(women);
    }
    if (voters.unknown.length > 0) {
        var unknown = "<p>Niezdefiniowani:<br>" + listVotersNames(voters.unknown) + "</p>";
        $("#unknown").html(unknown);
    }
}