WT-964 Refactor stub attribution

media/js/base/consent/utils.es6.js

@@ -5,6 +5,7 @@
  */
 
 import MozAllowList from './allow-list.es6';
+import DownloadAttribution from '../download-attribution/download-attribution.es6';
 
 const COOKIE_ID = 'moz-consent-pref'; // Cookie name
 const COOKIE_EXPIRY_DAYS = 182; // 6 months expiry
@@ -44,6 +45,16 @@ function setGtagAdsConsentMode(hasConsent, type = 'update') {
  * @returns {Boolean}
  */
 function setGtagAnalyticsConsentMode(hasConsent, type = 'update') {
+    // This is a failsafe to ensure we always remove analytics download attribution
+    // when consent status is denied (regardless of whether or not we are on page with
+    // a consent banner, i.e. the cookie policy page)
+    //
+    // This failsafe is only necessary as long as GTM is conditionally loaded
+    // Once it is always loaded, we can rely on GTM consent mode status
+    if (!hasConsent) {
+        DownloadAttribution.initAnalytics(false);
+    }
+
     // bail out if GTAG has not been created with GTMSnippet.loadSnippet
     // this needs to run before GTM snippet loads to set proper defaults
     if (typeof window.gtag === 'undefined') {
@@ -53,6 +64,9 @@ function setGtagAnalyticsConsentMode(hasConsent, type = 'update') {
         window.gtag('consent', type, {
             analytics_storage: 'granted'
         });
+
+        // We only apply analytics information if GTAG is available
+        DownloadAttribution.initAnalytics(true);
     } else {
         window.gtag('consent', type, {
             analytics_storage: 'denied'

media/js/base/download-attribution/download-attribution-init.es6.js

@@ -0,0 +1,14 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import DownloadAttribution from './download-attribution.es6';
+
+// Refresh the essential data to avoid an outdated download experience
+// - If there's new essential data, update
+// - If there's no essential data, remove
+DownloadAttribution.initEssential();
+
+DownloadAttribution.applyAttributionDataToLinks();