def publish_post(post, timeframe: :now)
  case timeframe
  when :now
    post.publish!
  when :tomorrow
    post.delay(run_at: 1.day.from_now).publish!
  else
    raise ArgumentError, "Invalid timeframe: #{timeframe.inspect}"
  end
end

# posts_controller.rb

def publish
  post = Post.find(params[:id])
  publish_post(post, params[:timeframe])
  redirect_to post, notice: "Done! 🎉 "
end

# => ArgumentError: Invalid timeframe: "now"