class FragmentSweeper < ActionController::Caching::Sweeper
  observe Listing

  def after_create(record)
     expire_cache_for(record)
  end

  def after_save(record)
    expire_cache_for(record)
  end

  def after_update(record)
    expire_cache_for(record)
  end

  def after_destroy(record)
    expire_cache_for(record)
  end

  private
    def expire_cache_for(record)
      @controller ||= ActionController::Base.new
      expire_fragment "listings/#{record.id}-#{record.updated_at.to_i}"
      Rails.logger.debug "***\n>>> Listing #{record.id} cache fragment expired!\n***" if Rails.env.development?
    end
end