Handle GA cookies when usage cookies are denied (#1755)

Handle GA cookies when usage cookies are denied
alphagov · Jun 17, 2019 · b2532b9 · b2532b9
2 parents 477b4bd + ae13166
commit b2532b9
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Showing 3 changed files with 58 additions and 21 deletions.
diff --git a/app/assets/javascripts/analytics/init.js.erb b/app/assets/javascripts/analytics/init.js.erb
@@ -1,24 +1,34 @@
 (function() {
   "use strict";
 
-  // Load Google Analytics libraries
-  GOVUK.StaticAnalytics.load();
-
-  // Use document.domain in dev, preview and staging so that tracking works
-  // Otherwise explicitly set the domain as www.gov.uk (and not gov.uk).
-  var cookieDomain = (document.domain == 'www.gov.uk') ? '.www.gov.uk' : document.domain;
-
-  var universalId = '<%= Rails.application.config.ga_universal_id %>';
-
-  // Configure profiles, setup custom vars, track initial pageview
-  var analytics = new GOVUK.StaticAnalytics({
-    universalId: universalId,
-    cookieDomain: cookieDomain,
-    allowLinker: true,
-    // This is served by Fastly in production, and returns an empty 200 response
-    govukTrackerUrl: '<%= asset_path "/static/a" %>'
-  });
-
-  // Make interface public for virtual pageviews and events
-  GOVUK.analytics = analytics;
+  var consentCookie = window.GOVUK.getConsentCookie();
+
+  // Disable analytics by default
+  // This will be reversed below, if the consent cookie says usage cookies are allowed
+  window['ga-disable-UA-26179049-1'] = true;
+
+  if (!consentCookie || consentCookie["usage"]) {
+    window['ga-disable-UA-26179049-1'] = false;
+
+    // Load Google Analytics libraries
+    GOVUK.StaticAnalytics.load();
+
+    // Use document.domain in dev, preview and staging so that tracking works
+    // Otherwise explicitly set the domain as www.gov.uk (and not gov.uk).
+    var cookieDomain = (document.domain == 'www.gov.uk') ? '.www.gov.uk' : document.domain;
+
+    var universalId = '<%= Rails.application.config.ga_universal_id %>';
+
+    // Configure profiles, setup custom vars, track initial pageview
+    var analytics = new GOVUK.StaticAnalytics({
+      universalId: universalId,
+      cookieDomain: cookieDomain,
+      allowLinker: true,
+      // This is served by Fastly in production, and returns an empty 200 response
+      govukTrackerUrl: '<%= asset_path "/static/a" %>'
+    });
+
+    // Make interface public for virtual pageviews and events
+    GOVUK.analytics = analytics;
+  }
 })();
diff --git a/app/assets/javascripts/analytics/static-analytics.js b/app/assets/javascripts/analytics/static-analytics.js
@@ -16,7 +16,11 @@
     // Create universal tracker
     // https://github.com/alphagov/govuk_frontend_toolkit/blob/master/docs/analytics.md
     // https://github.com/alphagov/govuk_frontend_toolkit/blob/master/javascripts/govuk/analytics/analytics.js
-    this.analytics = new GOVUK.Analytics(config);
+    var consentCookie = window.GOVUK.getConsentCookie();
+
+    if (!consentCookie || consentCookie['usage']) {
+      this.analytics = new GOVUK.Analytics(config);
+    }
 
     var trackingOptions = getOptionsFromCookie();
 

diff --git a/spec/javascripts/analytics/static-analytics-spec.js b/spec/javascripts/analytics/static-analytics-spec.js
@@ -2,6 +2,7 @@ describe("GOVUK.StaticAnalytics", function() {
   var analytics;
 
   beforeEach(function() {
+    window.GOVUK.setConsentCookie({'usage': true});
     window.ga = function() {};
     spyOn(window, 'ga');
     spyOn(GOVUK.analyticsPlugins, 'printIntent');
@@ -1058,6 +1059,28 @@ describe("GOVUK.StaticAnalytics", function() {
     });
   });
 
+  describe("when the consent cookie has been set", function() {
+    beforeEach(function() {
+      window.ga.calls.reset();
+    });
+
+    it('does not set analytics cookies as normal when usage cookies are allowed', function() {
+      window.GOVUK.setConsentCookie({'usage': false});
+      analytics = new GOVUK.StaticAnalytics({universalId: 'universal-id'});
+
+      expect(Object.keys(analytics).length).toBe(0)
+    });
+
+    it('does set analytics cookies as normal when usage cookies are allowed', function() {
+      window.GOVUK.setConsentCookie({'usage': true});
+      analytics = new GOVUK.StaticAnalytics({universalId: 'universal-id'});
+
+      expect(Object.keys(analytics).length).toBe(1)
+      expect(analytics.analytics.stripDatePII).toBe(false)
+      expect(analytics.analytics.stripPostcodePII).toBe(false)
+    });
+  });
+
   describe('when the seen_cookie_message cookie does not exist', function() {
     var pageViewObject;