module ZodiacHelper
  def zodiac_sign_for(date)
    if date.respond_to?(:strftime)
      birth = date.strftime("%m%d").to_i # month/day as an integer
    else
      birth = date
    end

    case birth
      when 11..120    then zodiac = "Capricorn"
      when 121..219   then zodiac = "Aquarius"
      when 220..320   then zodiac = "Pisces"
      when 321..420   then zodiac = "Aries"
      when 421..521   then zodiac = "Taurus"
      when 522..621   then zodiac = "Gemini"
      when 622..722   then zodiac = "Cancer"
      when 723..821   then zodiac = "Leo"
      when 822..923   then zodiac = "Virgo"
      when 924..1023  then zodiac = "Libra"
      when 1024..1122 then zodiac = "Scorpio"
      when 1123..1222 then zodiac = "Sagittarius"
      when 1223..1231 then zodiac = "Capricorn"
    else
      raise "Invalid date for zodiac sign - #{date}"
    end
    zodiac
  end
end