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 this 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?

      record.errors[attribute] << (options[:message] || live_code_error_message(value))
    end

    #################################

    def live_code_error_message value
      if value.present? && value.keys.count == 1
        return "Please check that you will come back to complete the code example."
      end
      "You must write comments or code in one of the textareas to progress."
    end
end