contr.rb

class TicketsController < ApplicationController
  respond_to? :js

  def index
    form = TicketFormValidator.new(form_params)
    if form.valid?
      @ticket = ticket_service(form.pnr_number)
      @pnr = form.pnr_number
      if @ticket.is_a? String
        flash.now[:error] = @ticket
        render 'shared/notice'
      end
    else
      flash.now[:error] = 'Заполните пустые поля'
      render 'shared/notice'
    end
  end

  private

  def form_params
    params.permit(:provider, :pnr_number)
  end

  def ticket_service(pnr_number)
    Kris::TicketRobotService.new.get_ticket(pnr_number)
  end
end