pry_gist.rb

class TimeDuration
  def initialize(duration)
    result = duration.match(/^(\d+)\s+(\w+)$/)
    durations = { "day" => 60*60*24, "days" => 60*60*24, "min" => 60, "minute" => 60, "minutes" => 60, "hour" => 60*60, "hours" => 60*60, "week" => 60*60*24*7, "weeks" => 60*60*24*7, "year" => 60*60*24*365, "years" => 60*60*24*365 }
    @duration = result[1].to_i * durations[result[2]]
  end
  def +(time_stamp)
    time_stamp + @duration
  end
end