Post_102.2.rb

module Form
  GENDER_VALUES = ["Female", "Male", "Unknown"]

  def self.build
    {
      first_name:       create_field(:first_name, 'First Name', create_strategy(PresenceValidation)),
      middle_name:      create_field(:middle_name, 'Middle Name', create_strategy(NoValidation)),
      last_name:        create_field(:last_name, 'Last Name', create_strategy(PresenceValidation)),
      gender:           create_field(:gender, 'Gender', create_strategy(IncludedValidation, GENDER_VALUES), GENDER_VALUES),
      birthdate:        create_field(:birthdate, 'Date Of Birth', create_strategy(DateValidation)),
      house_number:     create_field(:house_number, 'House #', create_strategy(NoValidation)),
      apartment_number: create_field(:apartment_number, 'Apt #', create_strategy(NoValidation)),
      street1:          create_field(:street1, 'Street', create_strategy(PresenceValidation)),
      street2:          create_field(:street2, 'Address Line 2', create_strategy(NoValidation)),
      city:             create_field(:city, 'City', create_strategy(PresenceValidation)),
      state:            create_field(:state, 'State', create_strategy(IncludedValidation, STATE_CODES), STATE_CODES),
      zip:              create_field(:zip, 'Zip Code', create_strategy(ZipValidation)),
      zip4:             create_field(:zip4, 'Zip+4', create_strategy(ZipFourValidation)),
      issue_state:      create_field(:issue_state, 'Issue State', create_strategy(IncludedValidation, STATE_CODES), STATE_CODES)
    }
  end

  def self.create_field(name, label, validation_validation, values = [])
    Field.new(name, label, validation_validation, values)
  end

  def self.create_strategy(strategy, *args)
    strategy.new(*args)
  end

  def self.validate(form, params)
    form.each do |name, field|
      field.validate(params[name])
    end
  end
end