activitypub: resolve quoted objects when new create activities are received

app/lib/activitypub/activity/create.rb

@@ -126,6 +126,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
         conversation: conversation_from_uri(@object['conversation']),
         media_attachment_ids: process_attachments.take(4).map(&:id),
         poll: process_poll,
+        quote: quote_from_url(@object['quoteUrl']),
       }
     end
   end
@@ -426,4 +427,11 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     poll.reload
     retry
   end
+
+  def quote_from_url(url)
+    return nil if url.nil?
+
+    quote = ResolveURLService.new.call(url)
+    status_from_uri(quote.uri) if quote
+  end
 end