mastodon/app/services/remove_domains_from_followers_service.rb

# frozen_string_literal: true

class RemoveDomainsFromFollowersService < BaseService
  include Payloadable

  def call(source_account, target_domains)
    source_account.passive_relationships.where(account_id: Account.where(domain: target_domains)).find_each do |follow|
      follow.destroy

      create_notification(follow) if source_account.local? && !follow.account.local? && follow.account.activitypub?
    end
  end

  private

  def create_notification(follow)
    ActivityPub::DeliveryWorker.perform_async(build_json(follow), follow.target_account_id, follow.account.inbox_url)
  end

  def build_json(follow)
    Oj.dump(serialize_payload(follow, ActivityPub::RejectFollowSerializer))
  end
end