Track additional merge request metrics

Track creating, reopening, closing and merging metrics

Issue: gitlab.com/gitlab-org/gitlab/-/issues/292827
MR: gitlab.com/gitlab-org/gitlab/-/merge_requests/50654

app/services/merge_requests/after_create_service.rb

@@ -4,6 +4,7 @@ module MergeRequests
   class AfterCreateService < MergeRequests::BaseService
     def execute(merge_request)
       event_service.open_mr(merge_request, current_user)
+      merge_request_activity_counter.track_create_mr_action(user: current_user)
       notification_service.new_merge_request(merge_request, current_user)
 
       create_pipeline_for(merge_request, current_user)

app/services/merge_requests/base_service.rb

@@ -52,6 +52,10 @@ module MergeRequests
       "#<#{self.class} #{merge_request.to_reference(full: true)}>"
     end
 
+    def merge_request_activity_counter
+      Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter
+    end
+
     private
 
     def enqueue_jira_connect_messages_for(merge_request)

app/services/merge_requests/close_service.rb

@@ -13,6 +13,7 @@ module MergeRequests
 
       if merge_request.close
         create_event(merge_request)
+        merge_request_activity_counter.track_close_mr_action(user: current_user)
         create_note(merge_request)
         notification_service.async.close_mr(merge_request, current_user)
         todo_service.close_merge_request(merge_request, current_user)

app/services/merge_requests/post_merge_service.rb

@@ -15,6 +15,7 @@ module MergeRequests
       todo_service.merge_merge_request(merge_request, current_user)
       create_event(merge_request)
       create_note(merge_request)
+      merge_request_activity_counter.track_merge_mr_action(user: current_user)
       notification_service.merge_mr(merge_request, current_user)
       execute_hooks(merge_request, 'merge')
       invalidate_cache_counts(merge_request, users: merge_request.assignees)

app/services/merge_requests/reopen_service.rb

@@ -8,6 +8,7 @@ module MergeRequests
       if merge_request.reopen
         create_event(merge_request)
         create_note(merge_request, 'reopened')
+        merge_request_activity_counter.track_reopen_mr_action(user: current_user)
         notification_service.async.reopen_mr(merge_request, current_user)
         execute_hooks(merge_request, 'reopen')
         merge_request.reload_diff(current_user)

changelogs/unreleased/292827-track-action-metrics-for-a-merge-request.yml

+---
+title: Add metrics to creating, closing, reopening and merging merge requests
+merge_request: 50654
+author:
+type: other

config/feature_flags/development/usage_data_i_code_review_user_close_mr.yml

+---
+name: usage_data_i_code_review_user_close_mr
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50654
+rollout_issue_url: 
+milestone: '13.8'
+type: development
+group: group::code review
+default_enabled: true

config/feature_flags/development/usage_data_i_code_review_user_create_mr.yml

+---
+name: usage_data_i_code_review_user_create_mr
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50654
+rollout_issue_url: 
+milestone: '13.8'
+type: development
+group: group::code review
+default_enabled: true

config/feature_flags/development/usage_data_i_code_review_user_merge_mr.yml

+---
+name: usage_data_i_code_review_user_merge_mr
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50654
+rollout_issue_url: 
+milestone: '13.8'
+type: development
+group: group::code review
+default_enabled: true

config/feature_flags/development/usage_data_i_code_review_user_reopen_mr.yml

+---
+name: usage_data_i_code_review_user_reopen_mr
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50654
+rollout_issue_url: 
+milestone: '13.8'
+type: development
+group: group::code review
+default_enabled: true

lib/gitlab/usage_data_counters/known_events/common.yml

@@ -425,6 +425,7 @@
   redis_slot: snippets
   aggregation: weekly
   feature_flag: usage_data_i_snippets_show
+# Merge request counters
 - name: i_code_review_mr_diffs
   redis_slot: code_review
   category: code_review
@@ -440,6 +441,26 @@
   category: code_review
   aggregation: weekly
   feature_flag: usage_data_i_code_review_mr_single_file_diffs
+- name: i_code_review_user_create_mr
+  redis_slot: code_review
+  category: code_review
+  aggregation: weekly
+  feature_flag: usage_data_i_code_review_user_create_mr
+- name: i_code_review_user_close_mr
+  redis_slot: code_review
+  category: code_review
+  aggregation: weekly
+  feature_flag: usage_data_i_code_review_user_close_mr
+- name: i_code_review_user_reopen_mr
+  redis_slot: code_review
+  category: code_review
+  aggregation: weekly
+  feature_flag: usage_data_i_code_review_user_reopen_mr
+- name: i_code_review_user_merge_mr
+  redis_slot: code_review
+  category: code_review
+  aggregation: weekly
+  feature_flag: usage_data_i_code_review_user_merge_mr
 # Terraform
 - name: p_terraform_state_api_unique_users
   category: terraform

lib/gitlab/usage_data_counters/merge_request_activity_unique_counter.rb

@@ -6,6 +6,10 @@ module Gitlab
       MR_DIFFS_ACTION = 'i_code_review_mr_diffs'
       MR_DIFFS_SINGLE_FILE_ACTION = 'i_code_review_mr_single_file_diffs'
       MR_DIFFS_USER_SINGLE_FILE_ACTION = 'i_code_review_user_single_file_diffs'
+      MR_CREATE_ACTION = 'i_code_review_user_create_mr'
+      MR_CLOSE_ACTION = 'i_code_review_user_close_mr'
+      MR_REOPEN_ACTION = 'i_code_review_user_reopen_mr'
+      MR_MERGE_ACTION = 'i_code_review_user_merge_mr'
 
       class << self
         def track_mr_diffs_action(merge_request:)
@@ -17,6 +21,22 @@ module Gitlab
           track_unique_action_by_user(MR_DIFFS_USER_SINGLE_FILE_ACTION, user)
         end
 
+        def track_create_mr_action(user:)
+          track_unique_action_by_user(MR_CREATE_ACTION, user)
+        end
+
+        def track_close_mr_action(user:)
+          track_unique_action_by_user(MR_CLOSE_ACTION, user)
+        end
+
+        def track_merge_mr_action(user:)
+          track_unique_action_by_user(MR_MERGE_ACTION, user)
+        end
+
+        def track_reopen_mr_action(user:)
+          track_unique_action_by_user(MR_REOPEN_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

@@ -39,4 +39,36 @@ RSpec.describe Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter, :cl
       let(:action) { described_class::MR_DIFFS_USER_SINGLE_FILE_ACTION }
     end
   end
+
+  describe '.track_create_mr_action' do
+    subject { described_class.track_create_mr_action(user: user) }
+
+    it_behaves_like 'a tracked merge request unique event' do
+      let(:action) { described_class::MR_CREATE_ACTION }
+    end
+  end
+
+  describe '.track_close_mr_action' do
+    subject { described_class.track_close_mr_action(user: user) }
+
+    it_behaves_like 'a tracked merge request unique event' do
+      let(:action) { described_class::MR_CLOSE_ACTION }
+    end
+  end
+
+  describe '.track_merge_mr_action' do
+    subject { described_class.track_merge_mr_action(user: user) }
+
+    it_behaves_like 'a tracked merge request unique event' do
+      let(:action) { described_class::MR_MERGE_ACTION }
+    end
+  end
+
+  describe '.track_reopen_mr_action' do
+    subject { described_class.track_reopen_mr_action(user: user) }
+
+    it_behaves_like 'a tracked merge request unique event' do
+      let(:action) { described_class::MR_REOPEN_ACTION }
+    end
+  end
 end

spec/services/merge_requests/after_create_service_spec.rb

@@ -27,6 +27,14 @@ RSpec.describe MergeRequests::AfterCreateService do
       execute_service
     end
 
+    it 'calls the merge request activity counter' do
+      expect(Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter)
+        .to receive(:track_create_mr_action)
+        .with(user: merge_request.author)
+
+      execute_service
+    end
+
     it 'creates a new merge request notification' do
       expect(notification_service)
         .to receive(:new_merge_request).with(merge_request, merge_request.author)

spec/services/merge_requests/close_service_spec.rb

@@ -75,6 +75,14 @@ RSpec.describe MergeRequests::CloseService do
       described_class.new(project, user, {}).execute(merge_request)
     end
 
+    it 'calls the merge request activity counter' do
+      expect(Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter)
+        .to receive(:track_close_mr_action)
+        .with(user: user)
+
+      described_class.new(project, user, {}).execute(merge_request)
+    end
+
     it 'refreshes the number of open merge requests for a valid MR', :use_clean_rails_memory_store_caching do
       service = described_class.new(project, user, {})
 

spec/services/merge_requests/post_merge_service_spec.rb

@@ -37,6 +37,14 @@ RSpec.describe MergeRequests::PostMergeService do
       subject
     end
 
+    it 'calls the merge request activity counter' do
+      expect(Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter)
+        .to receive(:track_merge_mr_action)
+        .with(user: user)
+
+      subject
+    end
+
     it 'deletes non-latest diffs' do
       diff_removal_service = instance_double(MergeRequests::DeleteNonLatestDiffsService, execute: nil)
 

spec/services/merge_requests/reopen_service_spec.rb

@@ -80,6 +80,14 @@ RSpec.describe MergeRequests::ReopenService do
       described_class.new(project, user, {}).execute(merge_request)
     end
 
+    it 'calls the merge request activity counter' do
+      expect(Gitlab::UsageDataCounters::MergeRequestActivityUniqueCounter)
+        .to receive(:track_reopen_mr_action)
+        .with(user: user)
+
+      described_class.new(project, user, {}).execute(merge_request)
+    end
+
     it 'refreshes the number of open merge requests for a valid MR' do
       service = described_class.new(project, user, {})