Non-deterministic navigation rendering

main.rb

Rails = nil

require 'simple-navigation'
SimpleNavigation.config_file_paths << File.expand_path('../', __FILE__)

include SimpleNavigation::Helpers

threads = []

20.times do
  threads << Thread.new do
    puts render_navigation
  end
end

threads.map(&:join)

navigation.rb

require './navigation_renderer'

SimpleNavigation::Configuration.run do |navigation|
  navigation.renderer = NavigationRenderer

  navigation.items do |primary|
    primary.item :books, 'Books', "#"
    primary.item :music, 'Music', "#"

    sleep 0.1 # This could be an ActiveRecord query retrieving renderable records.

    primary.item :records, 'records', "#" do |secondary|
      secondary.item :record_1, 'record_1', "#"
      secondary.item :record_2, 'record_2', "#"
    end
  end
end

navigation_renderer.rb

require 'simple-navigation'

class NavigationRenderer < SimpleNavigation::Renderer::Base
  def render(item_container)
    item_container.items.inject([]) do |list, item|
      list << item.name

      if include_sub_navigation?(item) || consider_sub_navigation?(item)
        list << render_sub_navigation_for(item)
      end

      list
    end.join(", ")
  end

  def tag_for(item)
    item.name
  end
end