// settings
cManager = {
    settings : {
        googleanalytics : {
            trackDownload : true,
            trackDownloadExtensions : '7z|aac|arc|arj|asf|asx|avi|bin|csv|doc|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls|xml|z|zip',
            trackCrossDomains : '',
            trackDomainMode : 2,
            trackfiles : true,
            trackMailto : true,
            trackOutbound : true,
            trackOutboundAsPageview : true
        }
    }
};

(function ($) {

    $(document).ready(function () {

        // Accepts a string; returns the string with regex metacharacters escaped. The returned string
        // can safely be used at any point within a regex to match the provided literal string. Escaped
        // characters are [ ] { } ( ) * + ? - . , \ ^ $ # and whitespace. The character | is excluded
        // in this function as it's used to separate the domains names.
        RegExp.escapeDomains = function (text) {
            return (text) ? text.replace(/[-[\]{}()*+?.,\\^$#\s]/g, "\\$&") : '';
        }

        // Attach onclick event to document only and catch clicks on all elements.
        $(document.body).click(function (event) {
            // Catch the closest surrounding link of a clicked element.
            $(event.target).closest("a,area").each(function () {

                var ga = cManager.settings.googleanalytics;
                // Expression to check for absolute internal links.
                var isInternal = new RegExp("^(https?):\/\/" + window.location.host, "i");
                // Expression to check for special links like gotwo.module /go/* links.
                var isInternalSpecial = new RegExp("(\/go\/.*)$", "i");
                // Expression to check for download links.
                var isDownload = new RegExp("\\.(" + ga.trackDownloadExtensions + ")$", "i");
                // Expression to check for the sites cross domains.
                var isCrossDomain = new RegExp("^(https?|ftp|news|nntp|telnet|irc|ssh|sftp|webcal):\/\/.*(" + RegExp.escapeDomains(ga.trackCrossDomains) + ")", "i");

                // Is the clicked URL internal?
                if (isInternal.test(this.href)) {
                    // Is download tracking activated and the file extension configured for download tracking?
                    if (ga.trackDownload && isDownload.test(this.href)) {
                        // Download link clicked.
                        var extension = isDownload.exec(this.href);
                        _gaq.push(["_trackEvent", "Downloads", extension[1].toUpperCase(), this.href.replace(isInternal, '')]);
                    }
                    else if (isInternalSpecial.test(this.href)) {
                        // Keep the internal URL for Google Analytics website overlay intact.
                        _gaq.push(["_trackPageview", this.href.replace(isInternal, '')]);
                    }
                }
                else {
                    if (ga.trackMailto && $(this).is("a[href^=mailto:],area[href^=mailto:]")) {
                        // Mailto link clicked.
                        _gaq.push(["_trackEvent", "Mails", "Click", this.href.substring(7)]);
                    }
                    else if (ga.trackOutbound && this.href) {
                        if (ga.trackDomainMode == 2 && isCrossDomain.test(this.href)) {
                            // Top-level cross domain clicked. document.location is handled by _link internally.
                            _gaq.push(["_link", this.href]);
                        }
                        else if (ga.trackOutboundAsPageview) {
                            // Track all external links as page views after URL cleanup.
                            // Currently required, if click should be tracked as goal.
                            _gaq.push(["_trackPageview", '/outbound/' + this.href.replace(/^(https?|ftp|news|nntp|telnet|irc|ssh|sftp|webcal):\/\//i, '').split('/').join('--')]);
                        }
                        else {
                            // External link clicked.
                            _gaq.push(["_trackEvent", "Outbound links", "Click", this.href]);
                        }
                    }
                }
            });
        });
    });

})(jQuery);