Accept remote quotes of local quotes according to set policy (#35629)

app/serializers/activitypub/accept_quote_request_serializer.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class ActivityPub::AcceptQuoteRequestSerializer < ActivityPub::Serializer
+  attributes :id, :type, :actor, :result
+
+  has_one :object, serializer: ActivityPub::QuoteRequestSerializer
+
+  def id
+    [ActivityPub::TagManager.instance.uri_for(object.quoted_account), '#accepts/quote_requests/', object.id].join
+  end
+
+  def type
+    'Accept'
+  end
+
+  def actor
+    ActivityPub::TagManager.instance.uri_for(object.quoted_account)
+  end
+
+  def result
+    ActivityPub::TagManager.instance.approval_uri_for(object)
+  end
+end

app/serializers/activitypub/quote_request_serializer.rb

@@ -23,6 +23,7 @@ class ActivityPub::QuoteRequestSerializer < ActivityPub::Serializer
   end
 
   def instrument
+    # TODO: inline object?
     ActivityPub::TagManager.instance.uri_for(object.status)
   end
 end