web_visits.js

var data, ua, platform, browser, os;

data = {
    page: window.location.pathname.replace(/\/$/, ''),
    language: navigator.language.slice(0, 2).toUpperCase(),
    screen_resolution: window.screen.width + 'x' + window.screen.height,
    screen_dpi: window.devicePixelRatio,
    is_touch_device: 'ontouchstart' in window || 'onmsgesturechange' in window
};
ua = navigator.userAgent.toLowerCase();
platform = navigator.platform.toLowerCase();

browser = ua.match(/(opera|chrome|safari|firefox|msie|trident)\/?\s*([\d\.]+)/) || [];
if (/trident/.test(browser[1])) browser = 'ie';
else if (browser[2]) browser = browser[1];
else if (! browser.length) browser = 'other';
if (browser == 'msie') browser = 'ie';
data.browser = browser.toLowerCase();

if (ua.match(/android/)) os = 'android';
else if (ua.match(/(iphone|ipod|ipad)/)) os = 'ios';
else if (ua.match(/windows phone/)) os = 'windows-phone';
else if (ua.match(/blackberry/)) os = 'blackberry';
else if (platform.match(/mac/)) os = 'mac';
else if (platform.match(/win/)) os = 'windows';
else if (platform.match(/linux/)) os = 'linux';
else os = 'other';
data.os = os;

$.ajax({
    url: '/analytics',
    data: JSON.stringify(data),
    type: 'POST'
});