Empty Merge Request analytics page

ee/app/controllers/groups/analytics/merge_request_analytics_controller.rb

+# frozen_string_literal: true
+
+class Groups::Analytics::MergeRequestAnalyticsController < Groups::Analytics::ApplicationController
+  check_feature_flag Gitlab::Analytics::GROUP_MERGE_REQUEST_ANALYTICS_FEATURE_FLAG
+
+  layout 'group'
+
+  before_action :load_group
+  before_action -> {
+    check_feature_availability!(:group_merge_request_analytics)
+  }
+  before_action -> {
+    authorize_view_by_action!(:read_group_merge_request_analytics)
+  }
+
+  def show
+  end
+end

ee/app/helpers/ee/analytics/navbar_helper.rb

@@ -21,7 +21,8 @@ module EE
           group_insights_navbar_link(group, current_user),
           issues_analytics_navbar_link(group, current_user),
           productivity_analytics_navbar_link(group, current_user),
-          group_cycle_analytics_navbar_link(group, current_user)
+          group_cycle_analytics_navbar_link(group, current_user),
+          group_merge_request_analytics_navbar_link(group, current_user)
         ].compact
       end
 
@@ -38,6 +39,16 @@ module EE
         )
       end
 
+      def group_merge_request_analytics_navbar_link(group, current_user)
+        return unless group_sidebar_link?(:merge_request_analytics)
+
+        navbar_sub_item(
+          title: _('Merge Requests'),
+          path: 'groups/analytics/merge_requests_analytics#show',
+          link: group_analytics_merge_request_analytics_path(group)
+        )
+      end
+
       def group_cycle_analytics_navbar_link(group, current_user)
         return unless group_sidebar_link?(:cycle_analytics)
 

ee/app/helpers/ee/groups_helper.rb

@@ -125,6 +125,10 @@ module EE
         links << :cycle_analytics
       end
 
+      if can?(current_user, :read_group_merge_request_analytics, @group)
+        links << :merge_request_analytics
+      end
+
       if can?(current_user, :read_group_contribution_analytics, @group) || show_promotions?
         links << :contribution_analytics
       end

ee/app/models/license.rb

@@ -74,11 +74,12 @@ class License < ApplicationRecord
     feature_flags
     file_locks
     geo
-    github_project_service_integration
     generic_alert_fingerprinting
+    github_project_service_integration
     group_allowed_email_domains
     group_coverage_reports
     group_ip_restriction
+    group_merge_request_analytics
     group_project_templates
     group_saml
     issues_analytics

ee/app/policies/ee/group_policy.rb

@@ -21,6 +21,10 @@ module EE
         @subject.feature_available?(:cycle_analytics_for_groups)
       end
 
+      condition(:group_merge_request_analytics_available) do
+        @subject.feature_available?(:group_merge_request_analytics)
+      end
+
       condition(:group_activity_analytics_available) do
         @subject.beta_feature_available?(:group_activity_analytics)
       end
@@ -124,6 +128,9 @@ module EE
       rule { has_access & group_activity_analytics_available }
         .enable :read_group_activity_analytics
 
+      rule { reporter & group_merge_request_analytics_available }
+        .enable :read_group_merge_request_analytics
+
       rule { reporter & cycle_analytics_available }.policy do
         enable :read_group_cycle_analytics, :create_group_stage, :read_group_stage, :update_group_stage, :delete_group_stage
       end

ee/config/routes/group.rb

@@ -24,8 +24,8 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
 
     namespace :analytics do
       resource :productivity_analytics, only: :show, constraints: -> (req) { Gitlab::Analytics.productivity_analytics_enabled? }
-
       resources :coverage_reports, only: :index, constraints: -> (req) { Gitlab::Analytics.group_coverage_reports_enabled? }
+      resource :merge_request_analytics, only: :show, constraints: -> (req) { Gitlab::Analytics.group_merge_request_analytics_enabled? }
 
       feature_default_enabled = Gitlab::Analytics.feature_enabled_by_default?(Gitlab::Analytics::CYCLE_ANALYTICS_FEATURE_FLAG)
       constrainer = ::Constraints::FeatureConstrainer.new(Gitlab::Analytics::CYCLE_ANALYTICS_FEATURE_FLAG, default_enabled: feature_default_enabled)

ee/lib/gitlab/analytics.rb

@@ -6,6 +6,7 @@ module Gitlab
     CYCLE_ANALYTICS_FEATURE_FLAG = :cycle_analytics
     PRODUCTIVITY_ANALYTICS_FEATURE_FLAG = :productivity_analytics
     GROUP_COVERAGE_REPORTS_FEATURE_FLAG = :group_coverage_reports
+    GROUP_MERGE_REQUEST_ANALYTICS_FEATURE_FLAG = :group_merge_request_analytics
 
     FEATURE_FLAGS = [
       CYCLE_ANALYTICS_FEATURE_FLAG,
@@ -35,6 +36,10 @@ module Gitlab
       feature_enabled?(GROUP_COVERAGE_REPORTS_FEATURE_FLAG)
     end
 
+    def self.group_merge_request_analytics_enabled?
+      feature_enabled?(GROUP_MERGE_REQUEST_ANALYTICS_FEATURE_FLAG)
+    end
+
     def self.feature_enabled_by_default?(flag)
       !!FEATURE_FLAG_DEFAULTS[flag]
     end

ee/spec/controllers/groups/analytics/merge_request_analytics_controller_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Groups::Analytics::MergeRequestAnalyticsController do
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:group) { create :group }
+  let_it_be(:feature_flag_name) { Gitlab::Analytics::GROUP_MERGE_REQUEST_ANALYTICS_FEATURE_FLAG }
+  let_it_be(:feature_name) { :group_merge_request_analytics }
+
+  before do
+    sign_in(current_user)
+
+    stub_feature_flags(feature_flag_name => true)
+    stub_licensed_features(feature_name => true)
+  end
+
+  describe 'GET show' do
+    subject { get :show, params: { group_id: group } }
+
+    before do
+      group.add_maintainer(current_user)
+    end
+
+    it { is_expected.to be_successful }
+
+    context 'when license is missing' do
+      before do
+        stub_licensed_features(feature_name => false)
+      end
+
+      it { is_expected.to have_gitlab_http_status(:forbidden) }
+    end
+
+    context 'when feature flag is off' do
+      before do
+        stub_feature_flags(feature_flag_name => false)
+      end
+
+      it { is_expected.to have_gitlab_http_status(:not_found) }
+    end
+
+    context 'when the user has no access to the group' do
+      before do
+        current_user.group_members.delete_all
+      end
+
+      it { is_expected.to have_gitlab_http_status(:forbidden) }
+    end
+  end
+end

ee/spec/features/groups/navbar_spec.rb

@@ -37,6 +37,22 @@ RSpec.describe 'Group navbar' do
     it_behaves_like 'verified navigation bar'
   end
 
+  context 'when merge request analytics is available' do
+    before do
+      stub_licensed_features(group_merge_request_analytics: true)
+
+      insert_after_sub_nav_item(
+        _('Contribution'),
+        within: _('Analytics'),
+        new_sub_nav_item_name: _('Merge Requests')
+      )
+
+      visit group_path(group)
+    end
+
+    it_behaves_like 'verified navigation bar'
+  end
+
   context 'when value stream analytics is available' do
     before do
       stub_licensed_features(cycle_analytics_for_groups: true)