Add Google Tag Manager for analytics (#541)

app/assets/javascripts/analytics/analytics.js

@@ -1,69 +0,0 @@
-(function (window) {
-  "use strict";
-
-  window.GOVUK = window.GOVUK || {};
-
-  // Stripped-down wrapper for Google Analytics, based on:
-  // https://github.com/alphagov/static/blob/master/doc/analytics.md
-  const Analytics = function (config) {
-    window.ga('create', {
-      'trackingId': config.trackingId,
-      'cookieDomain': config.cookieDomain,
-      'cookieExpires': config.expires * 24 * 60 * 60
-    });
-
-    window.ga('set', 'anonymizeIp', config.anonymizeIp);
-    window.ga('set', 'allowAdFeatures', config.allowAdFeatures);
-    window.ga('set', 'transport', config.transport);
-    window.ga('set', 'title', 'U.S. Notify');
-
-  };
-
-  Analytics.load = function () {
-    /* jshint ignore:start */
-    (function (i, s, o, g, r, a, m) {
-      i['GoogleAnalyticsObject'] = r; i[r] = i[r] || function () {
-        (i[r].q = i[r].q || []).push(arguments)
-      }, i[r].l = 1 * new Date(); a = s.createElement(o),
-        m = s.getElementsByTagName(o)[0]; a.async = 1; a.src = g; m.parentNode.insertBefore(a, m)
-    })(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');
-    /* jshint ignore:end */
-
-  };
-
-  Analytics.prototype.trackPageview = function (path, title, options) {
-
-    // strip UUIDs
-    const page = `${window.location.pathname}${window.location.search}`.replace(
-      /[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}/g, '…'
-    );
-    window.ga('send', 'pageview', page);
-
-  };
-
-  // https://developers.google.com/analytics/devguides/collection/analyticsjs/events
-  Analytics.prototype.trackEvent = function (category, action, options) {
-
-    options = options || {};
-
-    var evt = {
-      eventCategory: category,
-      eventAction: action
-    };
-
-    if (options.label) {
-      evt.eventLabel = options.label;
-      delete options.label;
-    }
-
-    if (typeof options === 'object') {
-      $.extend(evt, options);
-    }
-
-    window.ga('send', 'event', evt);
-
-  };
-
-  window.GOVUK.Analytics = Analytics;
-
-})(window);

app/assets/javascripts/analytics/init.js

@@ -1,40 +0,0 @@
-(function (window) {
-  "use strict";
-
-  window.GOVUK = window.GOVUK || {};
-
-  const trackingId = 'UA-75215134-1';
-
-  // Disable analytics by default
-  window[`ga-disable-${trackingId}`] = true;
-
-  const initAnalytics = function () {
-
-    // guard against being called more than once
-    if (!('analytics' in window.GOVUK)) {
-
-      window[`ga-disable-${trackingId}`] = false;
-
-      // Load Google Analytics libraries
-      window.GOVUK.Analytics.load();
-
-      // Configure profiles and make interface public
-      // for custom dimensions, virtual pageviews and events
-      window.GOVUK.analytics = new GOVUK.Analytics({
-        trackingId: trackingId,
-        cookieDomain: 'auto',
-        anonymizeIp: true,
-        allowAdFeatures: false,
-        transport: 'beacon',
-        expires: 365
-      });
-
-      // Track initial pageview
-      window.GOVUK.analytics.trackPageview();
-
-    }
-
-  };
-
-  window.GOVUK.initAnalytics = initAnalytics;
-})(window);