internetee-registry/app/controllers/repp/v1/registrar/nameservers_controller.rb

module Repp
  module V1
    module Registrar
      class NameserversController < BaseController
        before_action :verify_nameserver_existance, only: %i[update]

        def update
          domains = current_user.registrar
                                .replace_nameservers(hostname, hostname_params[:data][:attributes])

          render_success(data: data_format_for_success(domains))
        rescue ActiveRecord::RecordInvalid => e
          handle_errors(e.record)
        end

        private

        def data_format_for_success(affected_domains)
          { type: 'nameserver', id: params[:data][:attributes][:hostname],
            attributes: params[:data][:attributes], affected_domains: affected_domains }
        end

        def hostname_params
          params.require(:data).require(%i[type id])
          params.require(:data).require(:attributes).require(%i[hostname ipv4 ipv6])

          params.permit(data: [:type, :id, attributes: [:hostname, ipv4: [], ipv6: []]])
        end

        def hostname
          hostname_params[:data][:id]
        end

        def verify_nameserver_existance
          current_user.registrar.nameservers.find_by!(hostname: hostname)
        end
      end
    end
  end
end