Add QT attribute to send as quote

app/models/status.rb

@@ -226,6 +226,10 @@ class Status < ApplicationRecord
     !reblog_of_id.nil?
   end
 
+  def quote
+    reference_objects.where(attribute_type: 'QT').first&.target_status
+  end
+
   def within_realtime_window?
     created_at >= REAL_TIME_WINDOW.ago
   end

app/serializers/activitypub/note_serializer.rb

@@ -17,7 +17,6 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
 
   attribute :quote_uri, if: :quote?
   attribute :misskey_quote, key: :_misskey_quote, if: :quote?
-  attribute :misskey_content, key: :_misskey_content, if: :quote?
 
   has_many :virtual_attachments, key: :attachment
   has_many :virtual_tags, key: :tag
@@ -172,21 +171,21 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
   end
 
   def quote?
-    object.references.count == 1 && object.account.user&.settings&.[]('single_ref_to_quote')
+    @quote ||= (object.reference_objects.count == 1 && object.account.user&.settings&.[]('single_ref_to_quote')) || object.reference_objects.where(attribute_type: 'QT').count == 1
+  end
+
+  def quote_post
+    @quote_post ||= object.quote || object.references.first
   end
 
   def quote_uri
-    ActivityPub::TagManager.instance.uri_for(object.references.first)
+    ActivityPub::TagManager.instance.uri_for(quote_post)
   end
 
   def misskey_quote
     quote_uri
   end
 
-  def misskey_content
-    object.text
-  end
-
   def poll_options
     object.preloadable_poll.loaded_options
   end

spec/serializers/activitypub/note_serializer_spec.rb

@@ -73,7 +73,6 @@ describe ActivityPub::NoteSerializer do
       expect(subject['quoteUri']).to_not be_nil
       expect(subject['quoteUri']).to eq referred.uri
       expect(subject['_misskey_quote']).to eq referred.uri
-      expect(subject['_misskey_content']).to eq referred.text
       expect(subject['references']['first']['items']).to include referred.uri
     end
   end