Gab Social. All are welcome.

app/services/unfavourite_service.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+class UnfavouriteService < BaseService
+  def call(account, status)
+    favourite = Favourite.find_by!(account: account, status: status)
+    favourite.destroy!
+    create_notification(favourite) unless status.local?
+    favourite
+  end
+
+  private
+
+  def create_notification(favourite)
+    status = favourite.status
+
+    if status.account.ostatus?
+      NotificationWorker.perform_async(build_xml(favourite), favourite.account_id, status.account_id)
+    elsif status.account.activitypub?
+      ActivityPub::DeliveryWorker.perform_async(build_json(favourite), favourite.account_id, status.account.inbox_url)
+    end
+  end
+
+  def build_json(favourite)
+    Oj.dump(ActivityPub::LinkedDataSignature.new(ActiveModelSerializers::SerializableResource.new(
+      favourite,
+      serializer: ActivityPub::UndoLikeSerializer,
+      adapter: ActivityPub::Adapter
+    ).as_json).sign!(favourite.account))
+  end
+
+  def build_xml(favourite)
+    OStatus::AtomSerializer.render(OStatus::AtomSerializer.new.unfavourite_salmon(favourite))
+  end
+end