path: root/qa/qa/resource/api_fabricator.rb

# frozen_string_literal: true

require 'active_support/core_ext/object/deep_dup'
require 'capybara/dsl'

module QA
  module Resource
    module ApiFabricator
      include Capybara::DSL
      include Support::API
      include Errors

      attr_reader :api_fabrication_http_method
      attr_writer :api_client
      attr_accessor :api_user, :api_resource, :api_response

      def api_support?
        respond_to?(:api_get_path) &&
          (respond_to?(:api_post_path) && respond_to?(:api_post_body)) ||
          (respond_to?(:api_put_path) && respond_to?(:api_put_body))
      end

      # @return [String] the resource web url
      def fabricate_via_api!
        unless api_support?
          raise NotImplementedError, "Resource #{self.class.name} does not support fabrication via the API!"
        end

        resource_web_url(api_post)
      end

      def reload!
        api_get

        self
      end

      def remove_via_api!
        api_delete
      end

      def eager_load_api_client!
        return unless api_client.nil?

        api_client.tap do |client|
          # Eager-load the API client so that the personal token creation isn't
          # taken in account in the actual resource creation timing.
          client.user = user
          client.personal_access_token
        end
      end

      # Checks if a resource already exists
      #
      # @return [Boolean] true if the resource returns HTTP status code 200
      def exists?
        request = Runtime::API::Request.new(api_client, api_get_path)
        response = get(request.url)

        response.code == HTTP_STATUS_OK
      end

      # Parameters included in the query URL
      #
      # @return [Hash]
      def query_parameters
        @query_parameters ||= {}
      end

      private

      # rubocop:disable Gitlab/ModuleWithInstanceVariables
      def api_get
        process_api_response(parse_body(api_get_from(api_get_path))).tap do
          # Record method that was used to create certain resource
          #  :get - resource already existed in GitLab instance and was fetched via get request
          #  :post - resource was created from scratch using post request
          #  :put - resource was created from scratch using put request
          @api_fabrication_http_method ||= :get
        end
      end

      def api_get_from(get_path)
        path = "#{get_path}#{query_parameters_to_string}"
        request = Runtime::API::Request.new(api_client, path)
        response = get(request.url)

        if response.code == HTTP_STATUS_SERVER_ERROR
          raise(InternalServerError, <<~MSG.strip)
            Failed to GET #{request.mask_url} - (#{response.code}): `#{response}`.
            #{QA::Support::Loglinking.failure_metadata(response.headers[:x_request_id])}
          MSG
        elsif response.code != HTTP_STATUS_OK
          raise(ResourceNotFoundError, <<~MSG.strip)
            Resource at #{request.mask_url} could not be found (#{response.code}): `#{response}`.
            #{QA::Support::Loglinking.failure_metadata(response.headers[:x_request_id])}
          MSG
        end

        response
      end

      def api_post
        process_api_response(api_post_to(api_post_path, api_post_body)).tap do
          @api_fabrication_http_method ||= :post
        end
      end

      def api_post_to(post_path, post_body, args = {})
        if post_path == "/graphql"
          payload = post_body.is_a?(String) ? { query: post_body } : post_body
          graphql_response = post(Runtime::API::Request.new(api_client, post_path).url, payload, args)

          body = flatten_hash(parse_body(graphql_response))

          unless graphql_response.code == HTTP_STATUS_OK && (body[:errors].nil? || body[:errors].empty?)
            raise(ResourceFabricationFailedError, <<~MSG.strip)
              Fabrication of #{self.class.name} using the API failed (#{graphql_response.code}) with `#{graphql_response}`.
              #{QA::Support::Loglinking.failure_metadata(graphql_response.headers[:x_request_id])}
            MSG
          end

          body[:id] = body.fetch(:id).split('/').last if body.key?(:id)

          body.deep_transform_keys { |key| key.to_s.underscore.to_sym }
        else
          response = post(Runtime::API::Request.new(api_client, post_path).url, post_body, args)

          unless response.code == HTTP_STATUS_CREATED
            raise(ResourceFabricationFailedError, <<~MSG.strip)
              Fabrication of #{self.class.name} using the API failed (#{response.code}) with `#{response}`.
              #{QA::Support::Loglinking.failure_metadata(response.headers[:x_request_id])}
            MSG
          end

          parse_body(response)
        end
      end

      def api_put
        process_api_response(api_put_to(api_put_path, api_put_body)).tap do
          @api_fabrication_http_method ||= :put
        end
      end

      def api_put_to(put_path, body)
        response = put(Runtime::API::Request.new(api_client, put_path).url, body)

        unless response.code == HTTP_STATUS_OK
          raise(ResourceFabricationFailedError, <<~MSG.strip)
            Updating #{self.class.name} using the API failed (#{response.code}) with `#{response}`.
            #{QA::Support::Loglinking.failure_metadata(response.headers[:x_request_id])}
          MSG
        end

        parse_body(response)
      end

      def api_delete
        request = Runtime::API::Request.new(api_client, api_delete_path)
        response = delete(request.url)

        unless [HTTP_STATUS_NO_CONTENT, HTTP_STATUS_ACCEPTED].include? response.code
          raise(ResourceNotDeletedError, <<~MSG.strip)
            Resource at #{request.mask_url} could not be deleted (#{response.code}): `#{response}`.
            #{QA::Support::Loglinking.failure_metadata(response.headers[:x_request_id])}
          MSG
        end

        response
      end

      def resource_web_url(resource)
        resource.fetch(:web_url) do
          raise ResourceURLMissingError,
            "API resource for #{self.class.name} does not expose a `web_url` property: `#{resource}`."
        end
      end

      def api_client
        @api_client ||= Runtime::API::Client.new(
          :gitlab,
          is_new_session: !current_url.start_with?('http'),
          user: api_user
        )
      end
      # rubocop:enable Gitlab/ModuleWithInstanceVariables

      def process_api_response(parsed_response)
        self.api_response = parsed_response
        self.api_resource = transform_api_resource(parsed_response.deep_dup)
      end

      def transform_api_resource(api_resource)
        api_resource
      end

      # Get api request url
      #
      # @param [String] path
      # @return [String]
      def request_url(path, **opts)
        Runtime::API::Request.new(api_client, path, **opts).url
      end

      # Query parameters formatted as `?key1=value1&key2=value2...`
      #
      # @return [String]
      def query_parameters_to_string
        query_parameters.each_with_object([]) do |(k, v), arr|
          arr << "#{k}=#{v}"
        end.join('&').prepend('?').chomp('?') # prepend `?` unless the string is blank
      end

      def flatten_hash(param)
        param.each_pair.reduce({}) do |a, (k, v)|
          v.is_a?(Hash) ? a.merge(flatten_hash(v)) : a.merge(k.to_sym => v)
        end
      end
    end
  end
end