{{ $currentSect := default .Page.Section .Page.Params.BookSection}}
{{ $sections := where .Site.Sections "Section" .Page.Section}}
  <ul id = "top" class = "cn-book-section-container">
  {{ range $sections }}
    {{ template "book-section" (dict "Section" . "CurrentPage" $.Permalink) }}
  {{ end }}
  </ul>

{{ define "book-section" }}
  {{ with .Section }}
    <li class="cn-book-section">
        {{ template "book-page-link" (dict "Page" . "CurrentPage" $.CurrentPage) }}

        {{ template "book-section-children" (dict "Section" . "CurrentPage" $.CurrentPage ) }}
    </li>
  {{ end }}
{{ end }}

{{ define "book-section-children" }}
  {{ with .Section }}
    <ul id = subsection class="cn-book-section-container">
      {{ range .Sections }}
        {{ template "book-section" (dict "Section" . "CurrentPage" $.CurrentPage ) }}
      {{ end }}
      {{ range .Pages }}
        <li >{{ template "book-page-link" (dict "Page" . "CurrentPage" $.CurrentPage) }}</li>
      {{ end }}
    </ul>
  {{ end }}
{{ end }}

{{ define "book-page-link" }}
  {{ with .Page }}
    {{ if ne  .Params.bookhidden true }}
      <a href="{{ .RelPermalink }}" {{ if eq $.CurrentPage .Permalink }} class="active" {{ end }}>{{ .Title }}</a>
    {{ end }}
  {{ end }}
{{ end }}