codeforamerica/ohana-api

class StateProvinceValidator < ActiveModel::EachValidator
  COUNTRIES_NEEDING_VALIDATION = %w[US CA].freeze

  def validate_each(record, attribute, value)
    return unless COUNTRIES_NEEDING_VALIDATION.include?(record.country)

    default_message = I18n.t('errors.messages.invalid_state_province')

    return if value.present? && value.size == 2

    record.errors.add(attribute, (options[:message] || default_message))
  end
end