ministryofjustice/atet

class SpecialCharacterValidator < ActiveModel::EachValidator

  def validate_each(record, attribute, value)
    return if value.nil?

    allowed_values = ["a-zA-Z -'/"]
    allowed_values << "0-9" if allow_numbers == true
    allowed_values << "," if allow_comma == true

    regex = /^[#{allowed_values.join}]+$/i

    record.errors.add(attribute, :contains_special_characters) unless value.match(regex)
  end

  private

  def allow_comma
    @allow_comma ||= options[:comma]
  end

  def allow_numbers
    @allow_numbers ||= options[:number]
  end
end