Changes snowplow to use cookies for sessions

This also restructures how and where the configuration for
Snowplow lives.

app/assets/javascripts/main.js

@@ -35,6 +35,7 @@ import initPerformanceBar from './performance_bar';
 import initSearchAutocomplete from './search_autocomplete';
 import GlFieldErrors from './gl_field_errors';
 import initUserPopovers from './user_popovers';
+import { initUserTracking } from './tracking';
 import { __ } from './locale';
 
 import 'ee_else_ce/main_ee';
@@ -94,6 +95,7 @@ function deferredInitialisation() {
   initLogoAnimation();
   initUsagePingConsent();
   initUserPopovers();
+  initUserTracking();
 
   if (document.querySelector('.search')) initSearchAutocomplete();
 

app/assets/javascripts/tracking.js

 import $ from 'jquery';
 
+const DEFAULT_SNOWPLOW_OPTIONS = {
+  namespace: 'gl',
+  hostname: window.location.hostname,
+  cookieDomain: window.location.hostname,
+  appId: '',
+  userFingerprint: false,
+  respectDoNotTrack: true,
+  forceSecureTracker: true,
+  eventMethod: 'post',
+  contexts: { webPage: true },
+  // Page tracking tracks a single event when the page loads.
+  pageTrackingEnabled: false,
+  // Activity tracking tracks when a user is still interacting with the page.
+  // Events like scrolling and mouse movements are used to determine if the
+  // user has the tab active and is still actively engaging.
+  activityTrackingEnabled: false,
+};
+
 const extractData = (el, opts = {}) => {
   const { trackEvent, trackLabel = '', trackProperty = '' } = el.dataset;
   let trackValue = el.dataset.trackValue || el.value || '';
@@ -71,3 +89,13 @@ export default class Tracking {
     };
   }
 }
+
+export function initUserTracking() {
+  if (!Tracking.enabled()) return;
+
+  const opts = Object.assign({}, DEFAULT_SNOWPLOW_OPTIONS, window.snowplowOptions);
+  window.snowplow('newTracker', opts.namespace, opts.hostname, opts);
+
+  if (opts.activityTrackingEnabled) window.snowplow('enableActivityTracking', 30, 30);
+  if (opts.pageTrackingEnabled) window.snowplow('trackPageView'); // must be after enableActivityTracking
+}

app/views/layouts/_snowplow.html.haml

@@ -7,23 +7,4 @@
     };p[i].q=p[i].q||[];n=l.createElement(o);g=l.getElementsByTagName(o)[0];n.async=1;
     n.src=w;g.parentNode.insertBefore(n,g)}}(window,document,"script","#{asset_url('snowplow/sp.js')}","snowplow"));
 
-    window.snowplow('newTracker', '#{Gitlab::SnowplowTracker::NAMESPACE}', '#{Gitlab::CurrentSettings.snowplow_collector_hostname}', {
-      appId: '#{Gitlab::CurrentSettings.snowplow_site_id}',
-      cookieDomain: '#{Gitlab::CurrentSettings.snowplow_cookie_domain}',
-      userFingerprint: false,
-      respectDoNotTrack: true,
-      forceSecureTracker: true,
-      post: true,
-      contexts: { webPage: true },
-      stateStorageStrategy: "localStorage"
-    });
-
-    window.snowplow('enableActivityTracking', 30, 30);
-    window.snowplow('trackPageView');
-
-- return unless Feature.enabled?(:additional_snowplow_tracking, @group)
-
-= javascript_tag nonce: true do
-  :plain
-    window.snowplow('enableFormTracking');
-    window.snowplow('enableLinkClickTracking');
+    window.snowplowOptions = #{Gitlab::Tracking.snowplow_options(@group).to_json}

lib/gitlab/snowplow_tracker.rb

-# frozen_string_literal: true
-
-require 'snowplow-tracker'
-
-module Gitlab
-  module SnowplowTracker
-    NAMESPACE = 'cf'
-
-    class << self
-      def track_event(category, action, label: nil, property: nil, value: nil, context: nil)
-        tracker&.track_struct_event(category, action, label, property, value, context, Time.now.to_i)
-      end
-
-      private
-
-      def tracker
-        return unless enabled?
-
-        @tracker ||= ::SnowplowTracker::Tracker.new(emitter, subject, NAMESPACE, Gitlab::CurrentSettings.snowplow_site_id)
-      end
-
-      def subject
-        ::SnowplowTracker::Subject.new
-      end
-
-      def emitter
-        ::SnowplowTracker::Emitter.new(Gitlab::CurrentSettings.snowplow_collector_hostname)
-      end
-
-      def enabled?
-        Gitlab::CurrentSettings.snowplow_enabled?
-      end
-    end
-  end
-end

lib/gitlab/tracking.rb

+# frozen_string_literal: true
+
+require 'snowplow-tracker'
+
+module Gitlab
+  module Tracking
+    SNOWPLOW_NAMESPACE = 'gl'
+
+    class << self
+      def enabled?
+        Gitlab::CurrentSettings.snowplow_enabled?
+      end
+
+      def event(category, action, label: nil, property: nil, value: nil, context: nil)
+        return unless enabled?
+
+        snowplow.track_struct_event(category, action, label, property, value, context, Time.now.to_i)
+      end
+
+      def snowplow_options(group)
+        additional_features = Feature.enabled?(:additional_snowplow_tracking, group)
+        {
+          namespace: SNOWPLOW_NAMESPACE,
+          hostname: Gitlab::CurrentSettings.snowplow_collector_hostname,
+          cookie_domain: Gitlab::CurrentSettings.snowplow_cookie_domain,
+          app_id: Gitlab::CurrentSettings.snowplow_site_id,
+          page_tracking_enabled: additional_features,
+          activity_tracking_enabled: additional_features
+        }.transform_keys! { |key| key.to_s.camelize(:lower).to_sym }
+      end
+
+      private
+
+      def snowplow
+        @snowplow ||= SnowplowTracker::Tracker.new(
+          SnowplowTracker::Emitter.new(Gitlab::CurrentSettings.snowplow_collector_hostname),
+          SnowplowTracker::Subject.new,
+          SNOWPLOW_NAMESPACE,
+          Gitlab::CurrentSettings.snowplow_site_id
+        )
+      end
+    end
+  end
+end

spec/frontend/tracking_spec.js

 import $ from 'jquery';
 import { setHTMLFixture } from './helpers/fixtures';
 
-import Tracking from '~/tracking';
+import Tracking, { initUserTracking } from '~/tracking';
 
 describe('Tracking', () => {
+  let snowplowSpy;
+
   beforeEach(() => {
     window.snowplow = window.snowplow || (() => {});
+    window.snowplowOptions = {
+      namespace: '_namespace_',
+      hostname: 'app.gitfoo.com',
+      cookieDomain: '.gitfoo.com',
+    };
+    snowplowSpy = jest.spyOn(window, 'snowplow');
   });
 
-  describe('.event', () => {
-    let snowplowSpy = null;
+  describe('initUserTracking', () => {
+    it('calls through to get a new tracker with the expected options', () => {
+      initUserTracking();
+      expect(snowplowSpy).toHaveBeenCalledWith('newTracker', '_namespace_', 'app.gitfoo.com', {
+        namespace: '_namespace_',
+        hostname: 'app.gitfoo.com',
+        cookieDomain: '.gitfoo.com',
+        appId: '',
+        userFingerprint: false,
+        respectDoNotTrack: true,
+        forceSecureTracker: true,
+        eventMethod: 'post',
+        contexts: { webPage: true },
+        activityTrackingEnabled: false,
+        pageTrackingEnabled: false,
+      });
+    });
 
-    beforeEach(() => {
-      snowplowSpy = jest.spyOn(window, 'snowplow');
+    it('should activate features based on what has been enabled', () => {
+      initUserTracking();
+      expect(snowplowSpy).not.toHaveBeenCalledWith('enableActivityTracking', 30, 30);
+      expect(snowplowSpy).not.toHaveBeenCalledWith('trackPageView');
+
+      window.snowplowOptions = Object.assign({}, window.snowplowOptions, {
+        activityTrackingEnabled: true,
+        pageTrackingEnabled: true,
+      });
+
+      initUserTracking();
+      expect(snowplowSpy).toHaveBeenCalledWith('enableActivityTracking', 30, 30);
+      expect(snowplowSpy).toHaveBeenCalledWith('trackPageView');
     });
+  });
 
+  describe('.event', () => {
     afterEach(() => {
       window.doNotTrack = undefined;
       navigator.doNotTrack = undefined;

spec/lib/gitlab/snowplow_tracker_spec.rb

-# frozen_string_literal: true
-require 'spec_helper'
-
-describe Gitlab::SnowplowTracker do
-  let(:timestamp) { Time.utc(2017, 3, 22) }
-
-  around do |example|
-    Timecop.freeze(timestamp) { example.run }
-  end
-
-  subject { described_class.track_event('epics', 'action', property: 'what', value: 'doit') }
-
-  context '.track_event' do
-    context 'when Snowplow tracker is disabled' do
-      it 'does not track the event' do
-        expect(SnowplowTracker::Tracker).not_to receive(:new)
-
-        subject
-      end
-    end
-
-    context 'when Snowplow tracker is enabled' do
-      before do
-        stub_application_setting(snowplow_enabled: true)
-        stub_application_setting(snowplow_site_id: 'awesome gitlab')
-        stub_application_setting(snowplow_collector_hostname: 'url.com')
-      end
-
-      it 'tracks the event' do
-        tracker = double
-
-        expect(::SnowplowTracker::Tracker).to receive(:new)
-          .with(
-            an_instance_of(::SnowplowTracker::Emitter),
-            an_instance_of(::SnowplowTracker::Subject),
-            'cf', 'awesome gitlab'
-          ).and_return(tracker)
-        expect(tracker).to receive(:track_struct_event)
-          .with('epics', 'action', nil, 'what', 'doit', nil, timestamp.to_i)
-
-        subject
-      end
-    end
-  end
-end

spec/lib/gitlab/tracking_spec.rb

+# frozen_string_literal: true
+require 'spec_helper'
+
+describe Gitlab::Tracking do
+  let(:timestamp) { Time.utc(2017, 3, 22) }
+
+  before do
+    stub_application_setting(snowplow_enabled: true)
+    stub_application_setting(snowplow_collector_hostname: 'gitfoo.com')
+    stub_application_setting(snowplow_cookie_domain: '.gitfoo.com')
+    stub_application_setting(snowplow_site_id: '_abc123_')
+  end
+
+  describe '.snowplow_options' do
+    subject(&method(:described_class))
+
+    it 'returns useful client options' do
+      expect(subject.snowplow_options(nil)).to eq(
+        namespace: 'gl',
+        hostname: 'gitfoo.com',
+        cookieDomain: '.gitfoo.com',
+        appId: '_abc123_',
+        pageTrackingEnabled: true,
+        activityTrackingEnabled: true
+      )
+    end
+
+    it 'enables features using feature flags' do
+      stub_feature_flags(additional_snowplow_tracking: true)
+      allow(Feature).to receive(:enabled?).with(
+        :additional_snowplow_tracking,
+        '_group_'
+      ).and_return(false)
+
+      expect(subject.snowplow_options('_group_')).to include(
+        pageTrackingEnabled: false,
+        activityTrackingEnabled: false
+      )
+    end
+  end
+
+  describe '.event' do
+    subject(&method(:described_class))
+
+    around do |example|
+      Timecop.freeze(timestamp) { example.run }
+    end
+
+    it 'can track events' do
+      tracker = double
+
+      expect(SnowplowTracker::Emitter).to receive(:new).with(
+        'gitfoo.com'
+      ).and_return('_emitter_')
+
+      expect(SnowplowTracker::Tracker).to receive(:new).with(
+        '_emitter_',
+        an_instance_of(SnowplowTracker::Subject),
+        'gl',
+        '_abc123_'
+      ).and_return(tracker)
+
+      expect(tracker).to receive(:track_struct_event).with(
+        'category',
+        'action',
+        '_label_',
+        '_property_',
+        '_value_',
+        '_context_',
+        timestamp.to_i
+      )
+
+      subject.event('category', 'action',
+        label: '_label_',
+        property: '_property_',
+        value: '_value_',
+        context: '_context_'
+      )
+    end
+
+    it 'does not track when not enabled' do
+      stub_application_setting(snowplow_enabled: false)
+      expect(SnowplowTracker::Tracker).not_to receive(:new)
+
+      subject.event('epics', 'action', property: 'what', value: 'doit')
+    end
+  end
+end