Add link_set for updating links on StandardEdition update [WHIT-2828]

app/models/configurable_associations/factory.rb

@@ -13,8 +13,6 @@ def configurable_associations
       end
     end
 
-  private
-
     def associations
       {
         "ministerial_role_appointments" => ->(edition) { ConfigurableAssociations::MinisterialRoleAppointments.new(edition.role_appointments) },

app/presenters/publishing_api/payload_builder/configurable_document_links.rb

@@ -9,6 +9,14 @@ def self.association_links(item)
       factory.configurable_associations.map(&:links).reduce({}, :merge)
     end
 
+    def self.link_set(item)
+      factory = ConfigurableAssociations::Factory.new(item)
+      association_links = factory.configurable_associations.map(&:links)
+      link_difference = factory.associations.keys.map(&:to_sym) - association_links.map(&:keys).flatten
+      association_links.concat(link_difference.map { |association| [[association, []]].to_h })
+      association_links.reduce({}, :merge)
+    end
+
     def self.government_links(item)
       return {} unless item.type_instance.settings["history_mode_enabled"]
 

app/presenters/publishing_api/standard_edition_presenter.rb

@@ -33,6 +33,10 @@ def links
       PayloadBuilder::ConfigurableDocumentLinks.for(item)
     end
 
+    def link_set
+      PayloadBuilder::ConfigurableDocumentLinks.link_set(item)
+    end
+
     def document_type
       type.settings["publishing_api_document_type"]
     end

lib/whitehall/publishing_api.rb

@@ -84,7 +84,12 @@ def self.save_draft_translation(
     def self.patch_links(model_instance, bulk_publishing: false)
       presenter = PublishingApiPresenters.presenter_for(model_instance)
 
-      links = presenter.links
+      links = if presenter.respond_to?(:link_set)
+                presenter.link_set
+              else
+                presenter.links
+              end
+
       return if links.empty?
 
       Services.publishing_api.patch_links(