Add federation relay support (#7998)

* Add federation relay support

* Add admin UI for managing relays

* Include actor on relay-related activities

* Fix i18n

app/services/remove_status_service.rb

@@ -90,6 +90,18 @@ class RemoveStatusService < BaseService
     ActivityPub::DeliveryWorker.push_bulk(@account.followers.inboxes) do |inbox_url|
       [signed_activity_json, @account.id, inbox_url]
     end
+
+    relay! if relayable?
+  end
+
+  def relayable?
+    @status.public_visibility?
+  end
+
+  def relay!
+    ActivityPub::DeliveryWorker.push_bulk(Relay.enabled.pluck(:inbox_url)) do |inbox_url|
+      [signed_activity_json, @account.id, inbox_url]
+    end
   end
 
   def salmon_xml

app/services/suspend_account_service.rb

@@ -22,7 +22,13 @@ class SuspendAccountService < BaseService
   end
 
   def purge_content!
-    ActivityPub::RawDistributionWorker.perform_async(delete_actor_json, @account.id) if @account.local?
+    if @account.local?
+      ActivityPub::RawDistributionWorker.perform_async(delete_actor_json, @account.id)
+
+      ActivityPub::DeliveryWorker.push_bulk(Relay.enabled.pluck(:inbox_url)) do |inbox_url|
+        [delete_actor_json, @account.id, inbox_url]
+      end
+    end
 
     @account.statuses.reorder(nil).find_in_batches do |statuses|
       BatchedRemoveStatusService.new.call(statuses)
@@ -59,12 +65,14 @@ class SuspendAccountService < BaseService
   end
 
   def delete_actor_json
+    return @delete_actor_json if defined?(@delete_actor_json)
+
     payload = ActiveModelSerializers::SerializableResource.new(
       @account,
       serializer: ActivityPub::DeleteActorSerializer,
       adapter: ActivityPub::Adapter
     ).as_json
 
-    Oj.dump(ActivityPub::LinkedDataSignature.new(payload).sign!(@account))
+    @delete_actor_json = Oj.dump(ActivityPub::LinkedDataSignature.new(payload).sign!(@account))
   end
 end