Track when a merge request is created from an issue

MR: gitlab.com/gitlab-org/gitlab/-/merge_requests/53808
Issue: gitlab.com/gitlab-org/gitlab/-/issues/299264

app/services/merge_requests/create_from_issue_service.rb

@@ -25,6 +25,7 @@ module MergeRequests
       new_merge_request = create(merge_request)
 
       if new_merge_request.valid?
+        merge_request_activity_counter.track_mr_create_from_issue(user: current_user)
         SystemNoteService.new_merge_request(issue, project, current_user, new_merge_request)
 
         success(new_merge_request)

changelogs/unreleased/299264-track-create-merge-request-from-issues.yml

+---
+title: Track when a merge request is created from an issue
+merge_request: 53808
+author:
+type: other

config/feature_flags/development/usage_data_i_code_review_user_create_mr_from_issue.yml

+---
+name: usage_data_i_code_review_user_create_mr_from_issue
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/53808
+rollout_issue_url: 
+milestone: '13.9'
+type: development
+group: group::code review
+default_enabled: true

lib/gitlab/usage_data_counters/known_events/code_review_events.yml

@@ -159,3 +159,8 @@
   category: code_review
   aggregation: weekly
   feature_flag: usage_data_i_code_review_user_vs_code_api_request
+- name: i_code_review_user_create_mr_from_issue
+  redis_slot: code_review
+  category: code_review
+  aggregation: weekly
+  feature_flag: usage_data_i_code_review_user_create_mr_from_issue

lib/gitlab/usage_data_counters/merge_request_activity_unique_counter.rb

@@ -34,6 +34,7 @@ module Gitlab
       MR_APPROVAL_RULE_DELETED_USERS_ACTION = 'i_code_review_user_approval_rule_deleted'
       MR_EDIT_MR_TITLE_ACTION = 'i_code_review_edit_mr_title'
       MR_EDIT_MR_DESC_ACTION = 'i_code_review_edit_mr_desc'
+      MR_CREATE_FROM_ISSUE_ACTION = 'i_code_review_user_create_mr_from_issue'
 
       class << self
         def track_mr_diffs_action(merge_request:)
@@ -148,6 +149,10 @@ module Gitlab
           track_unique_action_by_user(MR_TASK_ITEM_STATUS_CHANGED_ACTION, user)
         end
 
+        def track_mr_create_from_issue(user:)
+          track_unique_action_by_user(MR_CREATE_FROM_ISSUE_ACTION, user)
+        end
+
         private
 
         def track_unique_action_by_merge_request(action, merge_request)

spec/lib/gitlab/usage_data_counters/merge_request_activity_unique_counter_spec.rb

@@ -276,4 +276,12 @@ RSpec.describe Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter, :cl
       let(:action) { described_class::MR_APPROVAL_RULE_DELETED_USERS_ACTION }
     end
   end
+
+  describe '.track_mr_create_from_issue' do
+    subject { described_class.track_mr_create_from_issue(user: user) }
+
+    it_behaves_like 'a tracked merge request unique event' do
+      let(:action) { described_class::MR_CREATE_FROM_ISSUE_ACTION }
+    end
+  end
 end

spec/services/merge_requests/create_from_issue_service_spec.rb

@@ -52,6 +52,14 @@ RSpec.describe MergeRequests::CreateFromIssueService do
         service.execute
       end
 
+      it 'tracks the mr creation when the mr is valid' do
+        expect(Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter)
+          .to receive(:track_mr_create_from_issue)
+          .with(user: user)
+
+        service.execute
+      end
+
       it 'creates the new_issue_branch system note when the branch could be created but the merge_request cannot be created', :sidekiq_might_not_need_inline do
         expect_next_instance_of(MergeRequest) do |instance|
           expect(instance).to receive(:valid?).at_least(:once).and_return(false)
@@ -62,6 +70,17 @@ RSpec.describe MergeRequests::CreateFromIssueService do
         service.execute
       end
 
+      it 'does not track the mr creation when the Mr is invalid' do
+        expect_next_instance_of(MergeRequest) do |instance|
+          expect(instance).to receive(:valid?).at_least(:once).and_return(false)
+        end
+
+        expect(Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter)
+          .not_to receive(:track_mr_create_from_issue)
+
+        service.execute
+      end
+
       it 'creates a merge request', :sidekiq_might_not_need_inline do
         expect { service.execute }.to change(target_project.merge_requests, :count).by(1)
       end