Track epic issues moved between projects

Record epic issues moved between projects
with Redis HLL.

doc/development/usage_ping/dictionary.md

@@ -9896,6 +9896,30 @@ Status: `implemented`
 
 Tiers: `premium`, `ultimate`
 
+### `redis_hll_counters.epics_usage.g_project_management_epic_issue_moved_from_project_monthly`
+
+Counts of MAU moving epic issues between projects
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/config/metrics/counts_28d/20210405190240_g_project_management_epic_issue_moved_from_project_monthly.yml)
+
+Group: `group::product planning`
+
+Status: `implemented`
+
+Tiers: `premium`, `ultimate`
+
+### `redis_hll_counters.epics_usage.g_project_management_epic_issue_moved_from_project_weekly`
+
+Counts of WAU moving epic issues between projects
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/config/metrics/counts_7d/20210405185814_g_project_management_epic_issue_moved_from_project_weekly.yml)
+
+Group: `group::product planning`
+
+Status: `implemented`
+
+Tiers: `premium`, `ultimate`
+
 ### `redis_hll_counters.epics_usage.g_project_management_epic_issue_removed_monthly`
 
 Count of MAU removing issues from epics

ee/app/services/ee/issues/move_service.rb

@@ -9,6 +9,7 @@ module EE
       def update_old_entity
         rewrite_epic_issue
         rewrite_related_vulnerability_issues
+        track_epic_issue_moved_from_project
         super
       end
 
@@ -25,6 +26,12 @@ module EE
         original_entity.reset
       end
 
+      def track_epic_issue_moved_from_project
+        return unless original_entity.epic_issue
+
+        ::Gitlab::UsageDataCounters::EpicActivityUniqueCounter.track_epic_issue_moved_from_project(author: current_user)
+      end
+
       def rewrite_related_vulnerability_issues
         issue_links = Vulnerabilities::IssueLink.for_issue(original_entity)
         issue_links.update_all(issue_id: new_entity.id)

ee/changelogs/unreleased/issue_292253-epic_issue_moved.yml

+---
+title: Track epic issues moved between projects
+merge_request: 58590
+author:
+type: other

ee/config/metrics/counts_28d/20210405190240_g_project_management_epic_issue_moved_from_project_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_epic_issue_moved_from_project_monthly
+description: Counts of MAU moving epic issues between projects
+product_section: dev
+product_stage: plan
+product_group: group::product planning
+product_category: epics_usage
+value_type: number
+status: implemented
+milestone: "13.11"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/58590
+time_frame: 28d
+data_source: redis_hll
+distribution:
+- ee
+tier:
+- premium
+- ultimate

ee/config/metrics/counts_7d/20210405185814_g_project_management_epic_issue_moved_from_project_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_epic_issue_moved_from_project_weekly
+description: Counts of WAU moving epic issues between projects
+product_section: dev
+product_stage: plan
+product_group: group::product planning
+product_category: epics_usage
+value_type: number
+status: implemented
+milestone: "13.11"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/58590
+time_frame: 7d
+data_source: redis_hll
+distribution:
+- ee
+tier:
+- premium
+- ultimate

ee/lib/gitlab/usage_data_counters/epic_activity_unique_counter.rb

@@ -21,6 +21,7 @@ module Gitlab
       EPIC_FIXED_DUE_DATE_UPDATED = 'g_project_management_users_updating_fixed_epic_due_date'
       EPIC_ISSUE_ADDED = 'g_project_management_epic_issue_added'
       EPIC_ISSUE_REMOVED = 'g_project_management_epic_issue_removed'
+      EPIC_ISSUE_MOVED_FROM_PROJECT = 'g_project_management_epic_issue_moved_from_project'
       EPIC_CLOSED = 'g_project_management_epic_closed'
       EPIC_REOPENED = 'g_project_management_epic_reopened'
       ISSUE_PROMOTED_TO_EPIC = 'g_project_management_issue_promoted_to_epic'
@@ -85,6 +86,10 @@ module Gitlab
           track_unique_action(EPIC_ISSUE_REMOVED, author)
         end
 
+        def track_epic_issue_moved_from_project(author:)
+          track_unique_action(EPIC_ISSUE_MOVED_FROM_PROJECT, author)
+        end
+
         def track_epic_closed_action(author:)
           track_unique_action(EPIC_CLOSED, author)
         end

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

@@ -234,6 +234,18 @@ RSpec.describe Gitlab::UsageDataCounters::EpicActivityUniqueCounter, :clean_gitl
     it_behaves_like 'does not track when feature flag is disabled', :track_epics_activity
   end
 
+  context 'for moving an issue that belongs to epic' do
+    def track_action(params)
+      described_class.track_epic_issue_moved_from_project(**params)
+    end
+
+    it_behaves_like 'a daily tracked issuable event' do
+      let(:action) { described_class::EPIC_ISSUE_MOVED_FROM_PROJECT }
+    end
+
+    it_behaves_like 'does not track when feature flag is disabled', :track_epics_activity
+  end
+
   context 'for promoting issue to epic' do
     def track_action(params)
       described_class.track_issue_promoted_to_epic(**params)

ee/spec/services/ee/issues/move_service_spec.rb

@@ -29,6 +29,23 @@ RSpec.describe Issues::MoveService do
         expect { move_service.execute(old_issue, new_project) }
           .not_to raise_error # Sidekiq::Worker::EnqueueFromTransactionError
       end
+
+      context 'when moved issue belongs to epic' do
+        it 'records epic moved from project event' do
+          create(:epic_issue, issue: old_issue)
+          expect(Gitlab::UsageDataCounters::EpicActivityUniqueCounter).to receive(:track_epic_issue_moved_from_project).with(author: user)
+
+          move_service.execute(old_issue, new_project)
+        end
+      end
+
+      context 'when moved issue does not belong to epic' do
+        it 'does not record epic moved from project event' do
+          expect(Gitlab::UsageDataCounters::EpicActivityUniqueCounter).not_to receive(:track_epic_issue_moved_from_project)
+
+          move_service.execute(old_issue, new_project)
+        end
+      end
     end
 
     context 'resource weight events' do

lib/gitlab/usage_data_counters/known_events/epic_events.yml

@@ -93,6 +93,12 @@
   aggregation: daily
   feature_flag: track_epics_activity
 
+- name: g_project_management_epic_issue_moved_from_project
+  category: epics_usage
+  redis_slot: project_management
+  aggregation: daily
+  feature_flag: track_epics_activity
+
 - name: g_project_management_epic_closed
   category: epics_usage
   redis_slot: project_management