Display credit card status in /admin/users/:id page

This will make it easier to tell whether and when users
have actually validated their accounts for GitLab.com.

Changelog: added
EE: true

app/views/admin/users/show.html.haml

@@ -59,6 +59,7 @@
               = _('Disabled')
 
         = render_if_exists 'admin/namespace_plan_info', namespace: @user.namespace
+        = render_if_exists 'admin/users/credit_card_info', user: @user
 
         %li
           %span.light= _('External User:')

ee/app/views/admin/users/_credit_card_info.html.haml

+- return unless Gitlab.com?
+%li#credit-card-status
+  - if user.credit_card_validated_at
+    %span.light= _('Credit card validated at:')
+    %strong
+      = user.credit_card_validated_at.to_s(:medium)
+  - else
+    %span.light= _('Credit card validated:')
+    %strong
+      = _('No')

ee/spec/factories/credit_card_validations.rb

+# frozen_string_literal: true
+
+FactoryBot.modify do
+  factory :credit_card_validation do
+    user
+    credit_card_validated_at { Time.current }
+  end
+end

ee/spec/views/admin/users/show.html.haml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'admin/users/show.html.haml' do
+  let_it_be(:user) { create(:user) }
+
+  let(:page) { Nokogiri::HTML.parse(rendered) }
+  let(:status) { page.at('#credit-card-status')&.text }
+
+  before do
+    assign(:user, user)
+  end
+
+  it 'does not include credit card validation status' do
+    render
+
+    expect(rendered).not_to include('Credit card validated')
+    expect(status).to be_nil
+  end
+
+  context 'Gitlab.com' do
+    before do
+      allow(::Gitlab).to receive(:com?).and_return(true)
+    end
+
+    it 'includes credit card validation status' do
+      render
+
+      expect(status).to match /Credit card validated:\s+No/
+    end
+
+    context 'when user is validated' do
+      let!(:validation) { create(:credit_card_validation, user: user) }
+
+      it 'includes credit card validation status' do
+        render
+
+        expect(status).to include 'Credit card validated at:'
+      end
+    end
+  end
+end

locale/gitlab.pot

@@ -9690,6 +9690,12 @@ msgstr ""
 msgid "CredentialsInventory|SSH Keys"
 msgstr ""
 
+msgid "Credit card validated at:"
+msgstr ""
+
+msgid "Credit card validated:"
+msgstr ""
+
 msgid "Critical vulnerabilities present"
 msgstr ""