module Admin::NodeHelper
  def render_nodes(page, starting_index, parent_index = nil, simple = false)
    @rendered_html = ''
    render_node page, starting_index, parent_index, simple
    @rendered_html
  end

  def render_node(page, index, parent_index = nil, simple = false)
    @current_node = prepare_page(page)

    @rendered_html += (render partial: 'admin/pages/node',
                              locals: { level: index, index: index, parent_index: parent_index,
                                        page: page, simple: simple, branch: (page.children.count > 0) })
    index
  end

  def prepare_page(page)
    page.extend MenuRenderer
    page.view = self
    if page.additional_menu_features?
      page.extend(*page.menu_renderer_modules)
    end
    page
  end

  def homepage
    @homepage ||= Page.find_by_parent_id(nil)
  end

  def show_all?
    controller.action_name == 'remove'
  end

  def expanded_rows
    unless @expanded_rows
      @expanded_rows = if rows = cookies[:expanded_rows]
                         rows.split(',').map do |x|
                           begin
                                                                      Integer(x)
                           rescue StandardError
                             nil
                                                                    end
                         end .compact
                       else
                         []
      end

      if homepage && !@expanded_rows.include?(homepage.id)
        @expanded_rows << homepage.id
      end
    end
    @expanded_rows
  end

  def expanded
    show_all? || expanded_rows.include?(@current_node.id)
  end

  def expander(level)
    if @current_node.children.empty? || (level == 0)
      ''
    else
      image((expanded ? 'collapse' : 'expand'),
            class: 'expander', alt: 'toggle children',
            title: '')
    end
  end

  def icon
    icon_name = @current_node.virtual? ? 'virtual_page' : 'page'
    image(icon_name, class: 'icon', alt: '', title: '')
  end

  def node_title
    %{<span class="title">#{h(@current_node.title)}</span>}.html_safe
  end

  def page_type
    display_name = @current_node.class.display_name
    if display_name == 'Page'
      ''
    else
      %{<span class="info">(#{h(display_name)})</span>}.html_safe
    end
  end

  def spinner
    image('spinner.gif',
          class: 'busy', id: "busy_#{@current_node.id}",
          alt: '', title: '',
          style: 'display: none;')
  end
end