class FileChange < Sublayer::Triggers::Base
  def initialize(&block)
    @block = block
  end

  def setup(agent)
    files_to_watch = agent.instance_eval(&@block)
    folders = files_to_watch.map { |file| File.dirname(File.expand_path(file)) }.uniq

    Listen.to(*folders) do |modified, added, removed|
      if files_to_watch.any? { |file| modified.include?(File.expand_path(file)) }
        activate(agent)
      end
    end.start
  end
end