Add promo image to DFC Enterprise API

We want to use this image in the Discover Regenerative portal in
Australia. The property is read-only and the API doesn't support the
upload of a new file.

The enterprise factory needed fixing as well. This trait hadn't been
used anywhere else.

engines/dfc_provider/app/services/enterprise_builder.rb

@@ -27,6 +27,7 @@ class EnterpriseBuilder < DfcBuilder
       add_ofn_property(e, "ofn:contact_name", enterprise.contact_name)
 
       add_ofn_property(e, "ofn:logo_url", enterprise.logo.url)
+      add_ofn_property(e, "ofn:promo_image_url", enterprise.promo_image.url)
     end
   end
 

engines/dfc_provider/spec/requests/enterprises_spec.rb

@@ -6,7 +6,7 @@ describe "Enterprises", type: :request, swagger_doc: "dfc.yaml", rswag_autodoc:
   let!(:user) { create(:oidc_user) }
   let!(:enterprise) do
     create(
-      :distributor_enterprise, :with_logo_image,
+      :distributor_enterprise, :with_logo_image, :with_promo_image,
       id: 10_000, owner: user, abn: "123 456", name: "Fred's Farm",
       description: "This is an awesome enterprise",
       contact_name: "Fred Farmer",
@@ -73,6 +73,13 @@ describe "Enterprises", type: :request, swagger_doc: "dfc.yaml", rswag_autodoc:
               %r{active_storage/[0-9A-Za-z/=-]*/logo.png},
               "active_storage/url/logo.png",
             )
+            response.body.gsub!(
+              %r{active_storage/[0-9A-Za-z/=-]*/promo.png},
+              "active_storage/url/promo.png",
+            ).gsub!(
+              %r{active_storage/[0-9A-Za-z/=-]*/promo.png},
+              "active_storage/url/promo.png",
+            )
           end
         end
       end

spec/factories/enterprise_factory.rb

@@ -29,7 +29,7 @@ FactoryBot.define do
   end
 
   trait :with_promo_image do
-    logo { Rack::Test::UploadedFile.new('spec/fixtures/files/promo.png', 'image/png') }
+    promo_image { Rack::Test::UploadedFile.new('spec/fixtures/files/promo.png', 'image/png') }
   end
 
   factory :supplier_enterprise, parent: :enterprise do

swagger/dfc.yaml

@@ -375,6 +375,7 @@ paths:
                       ofn:long_description: "<p>Hello, world!</p><p>This is a paragraph.</p>"
                       ofn:contact_name: Fred Farmer
                       ofn:logo_url: http://www.example.com/rails/active_storage/url/logo.png
+                      ofn:promo_image_url: http://www.example.com/rails/active_storage/url/promo.png
                       dfc-b:affiliates: http://test.host/api/dfc/enterprise_groups/60000
                     - "@id": http://test.host/api/dfc/addresses/40000
                       "@type": dfc-b:Address