Enable email users admin feature if UsagePing is enabled

Changelog: changed
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/64003
EE: true

Use Allow instead of expect

ee/app/helpers/admin/emails_helper.rb

@@ -5,7 +5,7 @@ module Admin
     include Gitlab::Utils::StrongMemoize
 
     def send_emails_from_admin_area_feature_available?
-      License.feature_available?(:send_emails_from_admin_area)
+      License.feature_available?(:send_emails_from_admin_area) || License.features_with_usage_ping.include?(:send_emails_from_admin_area)
     end
 
     def admin_emails_are_currently_rate_limited?

ee/app/models/license.rb

@@ -13,6 +13,10 @@ class License < ApplicationRecord
 
   EE_ALL_PLANS = [STARTER_PLAN, PREMIUM_PLAN, ULTIMATE_PLAN].freeze
 
+  EES_FEATURES_WITH_USAGE_PING = %i[
+    send_emails_from_admin_area
+  ].freeze
+
   EES_FEATURES = %i[
     audit_events
     blocked_issues
@@ -44,12 +48,11 @@ class License < ApplicationRecord
     repository_size_limit
     resource_access_token
     seat_link
-    send_emails_from_admin_area
     scoped_issue_board
     usage_quotas
     visual_review_app
     wip_limits
-  ].freeze
+  ].freeze + EES_FEATURES_WITH_USAGE_PING
 
   EEP_FEATURES = EES_FEATURES + %i[
     adjourned_deletion_for_projects_and_groups
@@ -199,6 +202,8 @@ class License < ApplicationRecord
     end
   end.freeze
 
+  FEATURES_WITH_USAGE_PING = EES_FEATURES_WITH_USAGE_PING
+
   # Add on codes that may occur in legacy licenses that don't have a plan yet.
   FEATURES_FOR_ADD_ONS = {
     'GitLab_Auditor_User' => :auditor_user,
@@ -275,6 +280,12 @@ class License < ApplicationRecord
       PLANS_BY_FEATURE.fetch(feature, [])
     end
 
+    def features_with_usage_ping
+      return FEATURES_WITH_USAGE_PING if Gitlab::CurrentSettings.usage_ping_enabled?
+
+      []
+    end
+
     def plan_includes_feature?(plan, feature)
       plans_with_feature(feature).include?(plan)
     end

ee/spec/controllers/admin/emails_controller_spec.rb

@@ -31,6 +31,7 @@ RSpec.describe Admin::EmailsController, :clean_gitlab_redis_shared_state do
       context 'when `send_emails_from_admin_area` feature is disabled' do
         before do
           stub_licensed_features(send_emails_from_admin_area: false)
+          allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(false)
         end
 
         it 'returns 404' do
@@ -39,6 +40,19 @@ RSpec.describe Admin::EmailsController, :clean_gitlab_redis_shared_state do
           expect(response).to have_gitlab_http_status(:not_found)
         end
       end
+
+      context 'when usage ping is enabled' do
+        before do
+          stub_licensed_features(send_emails_from_admin_area: false)
+          allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(true)
+        end
+
+        it 'responds with 200' do
+          subject
+
+          expect(response).to have_gitlab_http_status(:ok)
+        end
+      end
     end
 
     context 'non-admin user' do
@@ -122,6 +136,7 @@ RSpec.describe Admin::EmailsController, :clean_gitlab_redis_shared_state do
       context 'when `send_emails_from_admin_area` feature is disabled' do
         before do
           stub_licensed_features(send_emails_from_admin_area: false)
+          allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(false)
         end
 
         it 'does not trigger the service to send emails' do
@@ -136,6 +151,29 @@ RSpec.describe Admin::EmailsController, :clean_gitlab_redis_shared_state do
           expect(response).to have_gitlab_http_status(:not_found)
         end
       end
+
+      context 'when usage ping is enabled' do
+        before do
+          stub_licensed_features(send_emails_from_admin_area: false)
+          allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(true)
+        end
+
+        it 'triggers the service to send emails' do
+          expect_next_instance_of(Admin::EmailService, recipients, email_subject, body) do |email_service|
+            expect(email_service).to receive(:execute)
+          end
+
+          subject
+        end
+
+        it 'redirects to `admin_email_path` with success notice' do
+          subject
+
+          expect(response).to have_gitlab_http_status(:found)
+          expect(response).to redirect_to(admin_email_path)
+          expect(flash[:notice]).to eq('Email sent')
+        end
+      end
     end
 
     context 'non-admin user' do

ee/spec/features/admin/admin_emails_spec.rb

@@ -14,6 +14,7 @@ RSpec.describe 'Admin::Emails', :clean_gitlab_redis_shared_state do
   context 'when `send_emails_from_admin_area` feature is not licensed' do
     before do
       stub_licensed_features(send_emails_from_admin_area: false)
+      allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(false)
     end
 
     it 'returns 404' do
@@ -23,6 +24,19 @@ RSpec.describe 'Admin::Emails', :clean_gitlab_redis_shared_state do
     end
   end
 
+  context 'when usage ping is enabled' do
+    before do
+      stub_licensed_features(send_emails_from_admin_area: false)
+      allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(true)
+    end
+
+    it 'returns 200' do
+      visit admin_email_path
+
+      expect(page.status_code).to eq(200)
+    end
+  end
+
   context 'when `send_emails_from_admin_area` feature is licensed' do
     let(:rate_limited_alert) do
       'An email notification was recently sent from the admin panel. '\

ee/spec/features/admin/admin_users_spec.rb

@@ -28,6 +28,7 @@ RSpec.describe "Admin::Users", :js do
       context 'when `send_emails_from_admin_area` feature is disabled' do
         before do
           stub_licensed_features(send_emails_from_admin_area: false)
+          allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(false)
         end
 
         it "does not show the 'Send email to users' link" do
@@ -36,6 +37,19 @@ RSpec.describe "Admin::Users", :js do
           expect(page).not_to have_link(href: admin_email_path)
         end
       end
+
+      context 'when usage ping is enabled' do
+        before do
+          stub_licensed_features(send_emails_from_admin_area: false)
+          allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(true)
+        end
+
+        it "shows the 'Send email to users' link" do
+          visit admin_users_path
+
+          expect(page).to have_link(href: admin_email_path)
+        end
+      end
     end
 
     describe 'user permission export' do

ee/spec/helpers/admin/emails_helper_spec.rb

@@ -22,10 +22,22 @@ RSpec.describe Admin::EmailsHelper, :clean_gitlab_redis_shared_state do
     context 'when `send_emails_from_admin_area` feature is disabled' do
       before do
         stub_licensed_features(send_emails_from_admin_area: false)
+        allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(false)
       end
 
       it { is_expected.to be_falsey }
     end
+
+    context 'when usage ping is enabled' do
+      before do
+        stub_licensed_features(send_emails_from_admin_area: false)
+        allow(Gitlab::CurrentSettings).to receive(:usage_ping_enabled?).and_return(true)
+      end
+
+      it 'returns true' do
+        expect(subject).to eq(true)
+      end
+    end
   end
 
   describe '#admin_emails_are_currently_rate_limited?' do