ga util functions

wav.ga.js

(function() {
    window._gaq = window._gaq || [];
    var ga = wav.ga;
    var eventsPercentage = wav.$config.data("ga-events-percentage");

    ga.getCurrentPageCategory = function() {
        return "page_" + wav.getCurrentPage();
    };

    ga.isLoaded = function() {
        //http://stackoverflow.com/questions/1954910/javascript-detect-if-google-analytics-is-loaded-yet
        return window._gat && window._gat._getTracker;
    };

    ga.trackPageView = function(url) {
        ga.pageEvent("open", null, null, true);
        if (url) _gaq.push(['_trackPageview', url]);
    };

    ga.event = function(category, action, label, value, nonInteraction, force) {
        wav.console.debug("ga event: ", arguments);

        if (isProcessEvent(force)) {
            _gaq.push(['_trackEvent', category, action, label, value, nonInteraction]);
        }
    };

    ga.pageEvent = function(action, label, value, nonInteraction, force) {
        ga.event(ga.getCurrentPageCategory(), action, label, value, nonInteraction, force);
    };

    ga.eventWithCallback = function(category, action, label, callback, force) {
        wav.console.debug("ga event: ", arguments);

        if (ga.isLoaded() && isProcessEvent(force)) {
            //http://stackoverflow.com/questions/4086587/track-event-in-google-analytics-upon-clicking-form-submit
            _gaq.push(['_set', 'hitCallback', function() {
                _gaq.push(['_set', 'hitCallback', null]);
                callback();
            }]);
            _gaq.push(['_trackEvent', category, action, label]);
        } else {
            callback();
        }
    };

    ga.eventAndProcessLink = function(e, target, category, action, label, force) {
        if (ga.isLoaded() && isProcessEvent(force)) {
            e.preventDefault();
            ga.eventWithCallback(category, action, label, function() {
                window.location.href = (target || e.target).href;
            }, true);
        } else {
            //do process link click
        }
    };

    var isProcessEvent = function(forced) {
        return forced || eventsPercentage >= (Math.random()*100)
    };
}());