alps/themes/alps/nav.html

<header>
  <nav>
    {{$page := (index .GlobalData.Path 0)}}
    <a href="/"
      {{ if or (eq $page "mailbox") (eq $page "message") (eq $page "compose") }}
      class="active"
      {{ end }}
    >Email</a>
    {{ if call .GlobalData.HavePlugin "caldav" }}
    <a
      href="/calendar"
      {{ if eq $page "calendar" }}
      class="active"
      {{ end }}
    >Calendar</a>
    {{ end }}
    {{ if call .GlobalData.HavePlugin "carddav" }}
    <a
      href="/contacts"
      {{ if eq $page "contacts" }}
      class="active"
      {{ end }}
    >Contacts</a>
    {{ end }}
    {{ if .GlobalData.LoggedIn }}
    <div>
      <span>{{ .GlobalData.Username }}</span>
      <a href="/settings">Settings</a>
      <a href="/logout">Sign Out</a>
    </div>
    {{ end }}
  </nav>
  {{ if .GlobalData.Notice }}
  <div class="notice">
    {{ .GlobalData.Notice }}
    <a href="{{.GlobalData.URL.String}}">Dismiss</a>
  </div>
  {{ end }}
</header>