intridea/grape

# frozen_string_literal: true

module Grape
  module Validations
    # Documents parameters of an endpoint. If documentation isn't needed (for instance, it is an
    # internal API), the class only cleans up attributes to avoid junk in RAM.

    class AttributesDoc
      attr_accessor :type, :values

      # @param api [Grape::API::Instance]
      # @param scope [Validations::ParamsScope]
      def initialize(api, scope)
        @api = api
        @scope = scope
        @type = type
      end

      def extract_details(validations)
        details[:required] = validations.key?(:presence)

        desc = validations.delete(:desc) || validations.delete(:description)

        details[:desc] = desc if desc

        documentation = validations.delete(:documentation)

        details[:documentation] = documentation if documentation

        details[:default] = validations[:default] if validations.key?(:default)

        details[:min_length] = validations[:length][:min] if validations.key?(:length) && validations[:length].key?(:min)
        details[:max_length] = validations[:length][:max] if validations.key?(:length) && validations[:length].key?(:max)
      end

      def document(attrs)
        return if @api.namespace_inheritable(:do_not_document)

        details[:type] = type.to_s if type
        details[:values] = values if values

        documented_attrs = attrs.each_with_object({}) do |name, memo|
          memo[@scope.full_name(name)] = details
        end

        @api.namespace_stackable(:params, documented_attrs)
      end

      def required
        details[:required]
      end

      protected

      def details
        @details ||= {}
      end
    end
  end
end