Migrates Snowplow backend from EE to CE

This introduces several changes, but these are all just ported from the
EE project.

2 files changed, 41 insertions, 0 deletions

diff --git a/lib/api/settings.rb b/lib/api/settings.rb
index 196ef1fcdfa..c36ee5af63f 100644
--- a/lib/api/settings.rb
+++ b/lib/api/settings.rb
@@ -125,6 +125,12 @@ module API
       optional :instance_statistics_visibility_private, type: Boolean, desc: 'When set to `true` Instance statistics will only be available to admins'
       optional :local_markdown_version, type: Integer, desc: "Local markdown version, increase this value when any cached markdown should be invalidated"
       optional :allow_local_requests_from_hooks_and_services, type: Boolean, desc: 'Deprecated: Use :allow_local_requests_from_web_hooks_and_services instead. Allow requests to the local network from hooks and services.' # support legacy names, can be removed in v5
+      optional :snowplow_enabled, type: Grape::API::Boolean, desc: 'Enable Snowplow tracking'
+      given snowplow_enabled: ->(val) { val } do
+        requires :snowplow_collector_hostname, type: String, desc: 'The Snowplow collector hostname'
+        optional :snowplow_cookie_domain, type: String, desc: 'The Snowplow cookie domain'
+        optional :snowplow_site_id, type: String, desc: 'The Snowplow site name / application ic'
+      end
 
       ApplicationSetting::SUPPORTED_KEY_TYPES.each do |type|
         optional :"#{type}_key_restriction",
diff --git a/lib/gitlab/snowplow_tracker.rb b/lib/gitlab/snowplow_tracker.rb
new file mode 100644
index 00000000000..9f12513e09e
--- /dev/null
+++ b/lib/gitlab/snowplow_tracker.rb
@@ -0,0 +1,35 @@
+# 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