Track epic create note via usage ping

- Add usage ping metrics files
- Organise all note creation tracking events in one place

app/services/notes/create_service.rb

@@ -75,16 +75,9 @@ module Notes
       increment_usage_counter(note)
       track_event(note, current_user)
 
-      if Feature.enabled?(:notes_create_service_tracking, project)
-        Gitlab::Tracking.event('Notes::CreateService', 'execute', **tracking_data_for(note))
-      end
-
       if note.for_merge_request? && note.diff_note? && note.start_of_discussion?
         Discussions::CaptureDiffNotePositionService.new(note.noteable, note.diff_file&.paths).execute(note.discussion)
       end
-
-      track_note_creation_usage_for_issues(note) if note.for_issue?
-      track_note_creation_usage_for_merge_requests(note) if note.for_merge_request?
     end
 
     def do_commands(note, update_params, message, only_commands)
@@ -111,6 +104,16 @@ module Notes
       }
     end
 
+    def track_event(note, user)
+      track_note_creation_usage_for_issues(note) if note.for_issue?
+      track_note_creation_usage_for_merge_requests(note) if note.for_merge_request?
+      track_usage_event(:incident_management_incident_comment, user.id) if note.for_issue? && note.noteable.incident?
+
+      if Feature.enabled?(:notes_create_service_tracking, project)
+        Gitlab::Tracking.event('Notes::CreateService', 'execute', **tracking_data_for(note))
+      end
+    end
+
     def tracking_data_for(note)
       label = Gitlab.ee? && note.author == User.visual_review_bot ? 'anonymous_visual_review_note' : 'note'
 
@@ -120,12 +123,6 @@ module Notes
       }
     end
 
-    def track_event(note, user)
-      return unless note.noteable.is_a?(Issue) && note.noteable.incident?
-
-      track_usage_event(:incident_management_incident_comment, user.id)
-    end
-
     def track_note_creation_usage_for_issues(note)
       Gitlab::UsageDataCounters::IssueActivityUniqueCounter.track_issue_comment_added_action(author: note.author)
     end
@@ -135,3 +132,5 @@ module Notes
     end
   end
 end
+
+Notes::CreateService.prepend_if_ee('EE::Notes::CreateService')

changelogs/unreleased/292253-track-epic-note-created.yml

+---
+title: Track epic note created via usage ping
+merge_request: 56609
+author:
+type: other

doc/development/usage_ping/dictionary.md

@@ -9908,6 +9908,30 @@ Status: `implemented`
 
 Tiers: `premium`, `ultimate`
 
+### `redis_hll_counters.epics_usage.g_project_management_users_creating_epic_notes_monthly`
+
+Counts of MAU adding epic notes
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/config/metrics/counts_28d/20210314215451_g_project_management_users_creating_epic_notes_monthly.yml)
+
+Group: `group:product planning`
+
+Status: `implemented`
+
+Tiers: `premium`, `ultimate`
+
+### `redis_hll_counters.epics_usage.g_project_management_users_creating_epic_notes_weekly`
+
+Counts of WAU adding epic notes
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/config/metrics/counts_7d/20210314231518_g_project_management_users_creating_epic_notes_weekly.yml)
+
+Group: `group:product planning`
+
+Status: `implemented`
+
+Tiers: `premium`, `ultimate`
+
 ### `redis_hll_counters.epics_usage.g_project_management_users_destroying_epic_notes_monthly`
 
 Counts of MAU destroying epic notes

ee/app/services/ee/notes/create_service.rb

+# frozen_string_literal: true
+
+module EE
+  module Notes
+    module CreateService
+      extend ::Gitlab::Utils::Override
+
+      private
+
+      override :track_event
+      def track_event(note, user)
+        track_note_creation_usage_for_epics(user) if note.for_epic?
+
+        super(note, user)
+      end
+
+      def track_note_creation_usage_for_epics(user)
+        ::Gitlab::UsageDataCounters::EpicActivityUniqueCounter.track_epic_note_created_action(author: user)
+      end
+    end
+  end
+end

ee/config/metrics/counts_28d/20210314215451_g_project_management_users_creating_epic_notes_monthly.yml

+---
+# Name of this metric contains g_project_management prefix
+# because we are using the same slot from issue_tracking to
+# allow data aggregation.
+key_path: redis_hll_counters.epics_usage.g_project_management_users_creating_epic_notes_monthly
+description: Counts of MAU adding epic notes
+product_section: dev
+product_stage: plan
+product_group: group:product planning
+product_category: epics_usage
+value_type: number
+status: implemented
+milestone: "13.10"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56609
+time_frame: 28d
+data_source: redis_hll
+distribution:
+- ee
+tier:
+- premium
+- ultimate

ee/config/metrics/counts_7d/20210314231518_g_project_management_users_creating_epic_notes_weekly.yml

+---
+# Name of this metric contains g_project_management prefix
+# because we are using the same slot from issue_tracking to
+# allow data aggregation.
+key_path: redis_hll_counters.epics_usage.g_project_management_users_creating_epic_notes_weekly
+description: Counts of WAU adding epic notes
+product_section: dev
+product_stage: plan
+product_group: group:product planning
+product_category: epics_usage
+value_type: number
+status: implemented
+milestone: "13.10"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56609
+time_frame: 7d
+data_source: redis_hll
+distribution:
+- ee
+tier:
+- premium
+- ultimate

ee/lib/gitlab/usage_data_counters/epic_activity_unique_counter.rb

@@ -8,6 +8,7 @@ module Gitlab
       # slot of issue events to allow data aggregation.
       # More information in: https://gitlab.com/gitlab-org/gitlab/-/issues/322405
       EPIC_CREATED = 'g_project_management_epic_created'
+      EPIC_NOTE_CREATED = 'g_project_management_users_creating_epic_notes'
       EPIC_NOTE_UPDATED = 'g_project_management_users_updating_epic_notes'
       EPIC_NOTE_DESTROYED = 'g_project_management_users_destroying_epic_notes'
       EPIC_START_DATE_SET_AS_FIXED = 'g_project_management_users_setting_epic_start_date_as_fixed'
@@ -21,6 +22,10 @@ module Gitlab
           track_unique_action(EPIC_CREATED, author, time)
         end
 
+        def track_epic_note_created_action(author:, time: Time.zone.now)
+          track_unique_action(EPIC_NOTE_CREATED, author, time)
+        end
+
         def track_epic_note_updated_action(author:, time: Time.zone.now)
           track_unique_action(EPIC_NOTE_UPDATED, author, time)
         end

ee/spec/lib/gitlab/usage_data_counters/epic_activity_unique_counter_spec.rb

@@ -20,6 +20,18 @@ RSpec.describe Gitlab::UsageDataCounters::EpicActivityUniqueCounter, :clean_gitl
     it_behaves_like 'does not track when feature flag is disabled', :track_epics_activity
   end
 
+  context 'for epic note created event' do
+    def track_action(params)
+      described_class.track_epic_note_created_action(**params)
+    end
+
+    it_behaves_like 'a daily tracked issuable event' do
+      let(:action) { described_class::EPIC_NOTE_CREATED }
+    end
+
+    it_behaves_like 'does not track when feature flag is disabled', :track_epics_activity
+  end
+
   context 'for epic note updated event' do
     def track_action(params)
       described_class.track_epic_note_updated_action(**params)

ee/spec/services/ee/notes/create_service_spec.rb

@@ -7,6 +7,8 @@ RSpec.describe Notes::CreateService do
     let(:project) { create(:project) }
     let(:note_params) { opts }
 
+    let_it_be(:user) { create(:user) }
+
     context 'for issues' do
       let(:issuable) { create(:issue, project: project, weight: 10) }
       let(:opts) { { noteable_type: 'Issue', noteable_id: issuable.id } }
@@ -38,7 +40,6 @@ RSpec.describe Notes::CreateService do
     context 'for merge_requests' do
       let(:issuable) { create(:merge_request, project: project, source_project: project) }
       let(:developer) { create(:user) }
-      let(:user) { create(:user) }
       let(:opts) { { noteable_type: 'MergeRequest', noteable_id: issuable.id } }
 
       it_behaves_like 'issuable quick actions' do
@@ -59,5 +60,16 @@ RSpec.describe Notes::CreateService do
         end
       end
     end
+
+    context 'for epics' do
+      let_it_be(:epic) { create(:epic) }
+      let(:opts) { { noteable_type: 'Epic', noteable_id: epic.id, note: "hello" } }
+
+      it 'tracks epic note creation' do
+        expect(::Gitlab::UsageDataCounters::EpicActivityUniqueCounter).to receive(:track_epic_note_created_action)
+
+        described_class.new(nil, user, opts).execute
+      end
+    end
   end
 end

lib/gitlab/usage_data_counters/known_events/epic_events.yml

@@ -9,6 +9,12 @@
   aggregation: daily
   feature_flag: track_epics_activity
 
+- name: g_project_management_users_creating_epic_notes
+  category: epics_usage
+  redis_slot: project_management
+  aggregation: daily
+  feature_flag: track_epics_activity
+
 - name: g_project_management_users_updating_epic_notes
   category: epics_usage
   redis_slot: project_management