Use edition links for worldwide organisation people

We are switching worldwide organisations to use edition links which do
not support multi-level link expanstion.

Therefore we need to switch the rendering code to use the new link
fields that have been added, in the absence of multi-level links.

app/presenters/worldwide_organisation_presenter.rb

@@ -48,14 +48,14 @@ def person_in_primary_role
     return unless content_item["links"]["primary_role_person"]
 
     person = content_item.dig("links", "primary_role_person").first
-    current_roles = person.dig("links", "role_appointments").select { |role_app| role_app.dig("details", "current") }
+    current_roles = roles_for_person(person["content_id"])
 
     {
       name: person["title"],
       href: person["web_url"],
       image_url: person["details"]["image"]["url"],
       image_alt: person["details"]["image"]["alt_text"],
-      description: organisation_roles_for(current_roles),
+      description: presented_title_for_roles(current_roles),
     }
   end
 
@@ -66,12 +66,12 @@ def people_in_non_primary_roles
     return [] unless people.any?
 
     people.map do |person|
-      current_roles = person.dig("links", "role_appointments").select { |role_app| role_app.dig("details", "current") }
+      current_roles = roles_for_person(person["content_id"])
 
       {
         name: person["title"],
         href: person["web_url"],
-        description: organisation_roles_for(current_roles),
+        description: presented_title_for_roles(current_roles),
       }
     end
   end
@@ -128,16 +128,24 @@ def sponsoring_organisations
 
 private
 
-  def organisation_roles_for(current_appointments)
-    current_appointments
-      .map { |role_appointment| role_appointment.dig("links", "role").first }
-      .select { |role| organisation_role_ids.include?(role["content_id"]) }
+  def presented_title_for_roles(roles)
+    roles
       .map { |role| role["title"] }
       .compact.join(", ")
   end
 
-  def organisation_role_ids
-    content_item.dig("links", "roles")&.map { |role| role["content_id"] } || []
+  def roles_for_person(person_content_id)
+    content_item
+    .dig("details", "people_role_associations")
+    .select { |people_role_association| people_role_association["person_content_id"] == person_content_id }
+    .first["role_appointments"]
+    .pluck("role_content_id")
+    .map { |role_content_id|
+      content_item.dig("links", "roles").select do |role|
+        role["content_id"] == role_content_id
+      end
+    }
+    .flatten
   end
 
   def world_locations