Add Course::PublishService

  Extract the process of publishing a course to a service

app/services/courses/publish_service.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module Courses
+  class PublishService
+    UnpublishableError = Class.new(StandardError)
+
+    class << self
+      def publish(uuid:, user:)
+        Rails.logger.tagged('Course::PublishService') do |l|
+          l.info "publishing course uuid: #{uuid}"
+        end
+        course = Course.joins(:provider).find_by(uuid:)
+
+        raise UnpublishableError unless course.publishable?
+
+        Course.transaction do
+          course.publish_sites
+          course.publish_enrichment(user)
+          course.application_status_open!
+          NotificationService::CoursePublished.call(course:)
+        end
+      end
+    end
+  end
+end

spec/services/courses/publish_service_spec.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Courses::PublishService do
+  let(:uuid) { 'b39fe8fe-7cc5-42b8-a06f-d4461b7eb84e' }
+  let(:course) { create(:course, :publishable, uuid:) }
+  let(:user) { create(:user, :admin) }
+
+  describe 'publishable' do
+    it 'gets published' do
+      described_class.publish(uuid: course.uuid, user:)
+      expect(course.reload).to be_published
+    end
+  end
+
+  describe 'publish fails' do
+    it 'raises UnpublishableError' do
+      expect do
+        described_class.publish(uuid: course.uuid, user:)
+      end.to raise_error(described_class::UnpublishableError)
+    end
+  end
+end