Trigger background job to publish status page

This service should be call when issues, notes or notes emojis change.

ee/app/services/status_page/trigger_publish_service.rb

+# frozen_string_literal: true
+
+module StatusPage
+  # Triggers a background job to publish of incidents to the status page.
+  #
+  # Use this service when issues/notes/emoji have changed to kickoff the
+  # publish process.
+  class TriggerPublishService
+    def initialize(user:, project:)
+      @user = user
+      @project = project
+    end
+
+    def execute(issue_id)
+      return unless can_publish?
+      return unless status_page_enabled?
+
+      StatusPage::PublishIncidentWorker.perform_async(project.id, issue_id)
+    end
+
+    private
+
+    attr_reader :user, :project
+
+    def can_publish?
+      user.can?(:publish_status_page, project)
+    end
+
+    def status_page_enabled?
+      project.status_page_setting&.enabled?
+    end
+  end
+end

ee/spec/services/status_page/trigger_publish_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe StatusPage::TriggerPublishService do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project, refind: true) { create(:project) }
+  let_it_be(:issue) { create(:issue, project: project) }
+  let(:service) { described_class.new(user: user, project: project) }
+  let(:worker) { StatusPage::PublishIncidentWorker }
+
+  let_it_be(:status_page_setting) do
+    create(:status_page_setting, :enabled, project: project)
+  end
+
+  subject { service.execute(issue.id) }
+
+  shared_examples 'no job scheduled' do
+    it 'does not schedule a job' do
+      expect(worker).not_to receive(:perform_async)
+
+      subject
+    end
+  end
+
+  describe '#execute' do
+    before do
+      project.add_maintainer(user)
+      stub_feature_flags(status_page: true)
+      stub_licensed_features(status_page: true)
+
+      allow(worker).to receive(:perform_async).with(project.id, issue.id)
+    end
+
+    it 'schedules a job' do
+      expect(worker).to receive(:perform_async).with(project.id, issue.id)
+
+      subject
+    end
+
+    context 'when status page is missing' do
+      before do
+        status_page_setting.destroy
+      end
+
+      include_examples 'no job scheduled'
+    end
+
+    context 'when status page is not enabled' do
+      before do
+        status_page_setting.update!(enabled: false)
+      end
+
+      include_examples 'no job scheduled'
+    end
+
+    context 'when license is not available' do
+      before do
+        stub_licensed_features(status_page: false)
+      end
+
+      include_examples 'no job scheduled'
+    end
+
+    context 'when feature is disabled' do
+      before do
+        stub_feature_flags(status_page: false)
+      end
+
+      include_examples 'no job scheduled'
+    end
+
+    context 'when user cannot publish status page' do
+      before do
+        project.add_reporter(user)
+      end
+
+      include_examples 'no job scheduled'
+    end
+  end
+end