だいたい何日以内みたいなの返すRailsのヘルパー

gistfile1.rb

module FooHelper
  def unclear_time(to_time, from_time = Time.now.change(:hour => 0))
    from_time = from_time.to_time if from_time.respond_to?(:to_time)
    to_time   = to_time.to_time   if to_time.respond_to?(:to_time)
    distance_in_minutes = (((to_time - from_time).abs)/60).round

    case distance_in_minutes
    when 0..4320      then "三日以内"
    when 4321..10080  then "一週間以内"
    when 10081..44640 then "一か月以内"
    else "一ヶ月以上前"
    end
  end
end

<%= unclear_time(Time.now + 6.days) %> #=> "一週間以内"