module Admin::NodeHelper

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

def homepage
  @homepage ||= Page.find_by_parent_id(nil)
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 prepare_page(page)
  page.extend MenuRenderer
  page.view = self
  if page.additional_menu_features?
    page.extend(*page.menu_renderer_modules)
  end
  page
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.positive?) })
  index
end

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 show_all?
  controller.action_name == 'remove'
end

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