crypto_file.rb

class CryptoFile 
  attr_accessor :file_contents, :retrieve_key
  attr_reader :id

  def initialize(params={})
    params.each do |attr, value| 
      self.public_send("#{attr}=", value) 
    end if params

    if @id == nil
      @id = SecureRandom.uuid
    end
  end

  def id=(value)
    if value == nil
      @id = SecureRandom.uuid
    else
      @id = value
    end
  end
end