Show UsageData buttons only if cache exists

Changelog: changed

app/controllers/admin/application_settings_controller.rb

@@ -53,6 +53,7 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
   end
 
   def service_usage_data
+    @service_ping_data_present = Rails.cache.exist?('usage_data')
   end
 
   def update

app/views/admin/application_settings/service_usage_data.html.haml

@@ -7,10 +7,24 @@
 
 %h3= name
 
-%button.gl-button.btn.btn-default.js-payload-preview-trigger{ type: 'button', data: { payload_selector: ".#{payload_class}" } }
-  = gl_loading_icon(css_class: 'js-spinner gl-display-none gl-mr-2')
-  .js-text.gl-display-inline= _('Preview payload')
-%button.gl-button.btn.btn-default.js-payload-download-trigger{ type: 'button', data: { endpoint: usage_data_admin_application_settings_path(format: :json) } }
-  = gl_loading_icon(css_class: 'js-spinner gl-display-none gl-mr-2')
-  .js-text.d-inline= _('Download payload')
-%pre.js-syntax-highlight.code.highlight.gl-mt-2.gl-display-none{ class: payload_class, data: { endpoint: usage_data_admin_application_settings_path(format: :html) } }
+- if @service_ping_data_present
+  %button.gl-button.btn.btn-default.js-payload-preview-trigger{ type: 'button', data: { payload_selector: ".#{payload_class}" } }
+    = gl_loading_icon(css_class: 'js-spinner gl-display-none gl-mr-2')
+    .js-text.gl-display-inline= _('Preview payload')
+  %button.gl-button.btn.btn-default.js-payload-download-trigger{ type: 'button', data: { endpoint: usage_data_admin_application_settings_path(format: :json) } }
+    = gl_loading_icon(css_class: 'js-spinner gl-display-none gl-mr-2')
+    .js-text.d-inline= _('Download payload')
+  %pre.js-syntax-highlight.code.highlight.gl-mt-2.gl-display-none{ class: payload_class, data: { endpoint: usage_data_admin_application_settings_path(format: :html) } }
+- else
+  = render 'shared/global_alert',
+    variant: :warning,
+    dismissible: false,
+    title: 'Service Ping payload not found in the application cache' do
+
+    .gl-alert-body
+      - enable_service_ping_link_url = help_page_path('user/admin_area/settings/usage_statistics', anchor: 'enable-or-disable-usage-statistics')
+      - enable_service_ping_link = '<a href="%{url}">'.html_safe % { url: enable_service_ping_link_url }
+      - generate_manually_link_url = help_page_path('administration/troubleshooting/gitlab_rails_cheat_sheet', anchor: 'generate-service-ping')
+      - generate_manually_link = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: generate_manually_link_url }
+
+      = html_escape(s_('%{enable_service_ping_link_start}Enable%{link_end} or %{generate_manually_link_start}generate%{link_end} Service Ping to preview and download service usage data payload.')) % { enable_service_ping_link_start: enable_service_ping_link, generate_manually_link_start: generate_manually_link, link_end: '</a>'.html_safe }

locale/gitlab.pot

@@ -652,6 +652,9 @@ msgstr ""
 msgid "%{emailPrefix}@company.com"
 msgstr ""
 
+msgid "%{enable_service_ping_link_start}Enable%{link_end} or %{generate_manually_link_start}generate%{link_end} Service Ping to preview and download service usage data payload."
+msgstr ""
+
 msgid "%{extra} more downstream pipelines"
 msgstr ""
 

spec/features/admin/admin_settings_spec.rb

@@ -854,31 +854,45 @@ RSpec.describe 'Admin updates settings' do
       before do
         stub_usage_data_connections
         stub_database_flavor_check
-
-        visit service_usage_data_admin_application_settings_path
       end
 
-      it 'loads usage ping payload on click', :js do
-        expected_payload_content = /(?=.*"uuid")(?=.*"hostname")/m
+      context 'when service data cached', :clean_gitlab_redis_cache do
+        before do
+          allow(Rails.cache).to receive(:exist?).with('usage_data').and_return(true)
 
-        expect(page).not_to have_content expected_payload_content
+          visit service_usage_data_admin_application_settings_path
+        end
+
+        it 'loads usage ping payload on click', :js do
+          expected_payload_content = /(?=.*"uuid")(?=.*"hostname")/m
 
-        click_button('Preview payload')
+          expect(page).not_to have_content expected_payload_content
 
-        wait_for_requests
+          click_button('Preview payload')
 
-        expect(page).to have_button 'Hide payload'
-        expect(page).to have_content expected_payload_content
-      end
+          wait_for_requests
 
-      it 'generates usage ping payload on button click', :js do
-        expect_next_instance_of(Admin::ApplicationSettingsController) do |instance|
-          expect(instance).to receive(:usage_data).and_call_original
+          expect(page).to have_button 'Hide payload'
+          expect(page).to have_content expected_payload_content
         end
 
-        click_button('Download payload')
+        it 'generates usage ping payload on button click', :js do
+          expect_next_instance_of(Admin::ApplicationSettingsController) do |instance|
+            expect(instance).to receive(:usage_data).and_call_original
+          end
+
+          click_button('Download payload')
 
-        wait_for_requests
+          wait_for_requests
+        end
+      end
+
+      context 'when service data not cached' do
+        it 'renders missing cache information' do
+          visit service_usage_data_admin_application_settings_path
+
+          expect(page).to have_text('Service Ping payload not found in the application cache')
+        end
       end
     end
   end