A small script to generate memorable one-time passcodes.

one_time_code.rb

# A small script to generate memorable one-time codes.
# 
# OneTimeCode.generate
# => "ubahow-idea-easy-aveda"
class OneTimeCode
  def initialize(length = 12)
    @length = length
    @mod_result = MOD_RESULT.sample
  end

  def generate
    length.times.map { |i| i % 2 == mod_result ? CONSONANTS.sample : VOGALS.sample }.join
  end

  private

  VOGALS = %w[a e i o u y].freeze
  CONSONANTS = [*'a'..'z'] - VOGALS
  MOD_RESULT = [0, 1].freeze
  WORDS = %w[airy ally bold boss calm care cool core cure cute each easy fair fast feat fine free full give glad glow good grin grow here hold holy idea keen kind kiss know love].freeze

  attr_reader :length, :mod_result

  def self.generate
    words = 2.times.map do
      new(rand(4..6)).generate
    end
    words.shuffle!
    2.times { words.prepend(WORDS.sample) }
    words.shuffle.join('-')
  end
end

OneTimeCode.generate