A small Time class extension that gives a fuzzy time string output

rougly.rb

class Time
  # Gives a 'fuzzy' output of the distance to the time stored.
  # 
  # eg. 'in 28 minutes' or '23 hours ago'
  def roughly
    diff = self.to_i - Time.now.to_i
    ago = diff < 0
    diff = diff.abs
    case diff
    when 0
      return "now"
    when 1...60
      unit = "second"
    when 60...3600
      diff = (diff/60).round
      unit = "minute"
    when 3600...86400
      diff = (diff/3600).round
      unit = "hour"
    when 86400...604800
      diff = (diff/86400).round
      unit = "day"
    when 604800...2592000
      diff = (diff/604800).round
      unit = "week"
    when 2592000...31557600
      diff = (diff/2592000).round
      unit = "month"
    else
      diff = (diff/31557600).round
      unit = "year"
    end
    unit += "s" if diff != 1
    return (ago) ? "#{diff} #{unit} ago" : "in #{diff} #{unit}"
  end
end