skill-assessment-app/app/validators/answer_format_validator.rb

class AnswerFormatValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    send(record.question.input_type, record, attribute, value)
  end

  private

    def text record, attribute, value
      clean_val = value.to_s.strip
      return if clean_val.length.between?(1, 1000)

      if clean_val.blank?
        record.errors[attribute] << (options[:message] || "Please enter an answer.")
      end

      if clean_val.length > 1000
        record.errors[attribute] << (options[:message] || "The character limit for a textarea answer is 1000")
      end
    end

    def radio record, attribute, value
      return unless value.to_s.strip.blank?

      record.errors[attribute] << (options[:message] || "Please select an answer.")
    end

    def checkbox record, attribute, value
      return unless value.nil? || Array(value).join.blank?

      record.errors[attribute] << (options[:message] || "Please select an answer.")
    end

    def live_code record, attribute, value
      return unless value.nil? || value.values.join.blank?

      msg = if value.present? && value.keys.count == 1
              "Please check that you will come back to complete the code example."
            else
              "You must write code in one of the above textareas to progress."
            end
      record.errors[attribute] << (options[:message] || msg)
    end
end