A Jinja2 template-based shortcode for Nikola to embed a HTML5 audio player and download links

audio.tmpl

{#

Usage:

    {{% audio src=http://example.com/my-track.mp3 %}}

Or:

    {{% audio src=http://example.com/my-track.mp3 formats=mp3,ogg %}}
    Sorry, your browser does not seem to support the HTML 5 audio element.
    {{% /audio %}}

The shortcode supports a few other parameters:

    {{% audio src=my-track.mp3 download="Datei herunterladen:" nocontrols=1 loop=1 autoplay=1 %}}

And:

    {{% audio src=http://example.com/my-track.mp3 nodownload=1 %}}

Boolean parameters must have a value to take effect, but it doesn't matter what
the value is.

#}

{% macro stripext(s) -%}{{ s[:s.rfind('.')] if '.' in s else s }}{% endmacro %}

{% macro getext(s) -%}{{ s[s.rfind('.')+1:] if '.' in s else s }}{% endmacro %}

<div class="audio-embed">
  <audio{{ ' controls' if not nocontrols }}{{ ' autoplay' if autoplay }}{{ ' loop' if loop }}>
    {% for fmt in (formats.split(',') if formats is defined else [getext(src)]) %}
    <source src="{{ '{}.{}'.format(stripext(src), fmt) }}"
      type="audio/{{ fmt }}" />
    {% endfor %}
    {% if data %}
    <p>{{ data }}<p>
    {% else %}
    <p>Sorry, your browser does not seem to support the <code>audio</code> element.</p>
    {% if nodownload %}
    <p>You can <a href="{{ src }}">download the audio file</a> instead.</p>
    {% endif %}
    {% endif %}
  </audio>

  {% if not nodownload %}
  <p class="download-links"><strong>{{ download | default('Download:') }}</strong>
    {% for fmt in (formats.split(',') if formats is defined else [getext(src)]) %}
      <a href="{{ '{}.{}'.format(stripext(src), fmt) }}">{{ fmt | upper }}</a>
      {% if not loop.last %}|{% endif %}
    {% endfor %}
  </p>
  {% endif %}
</div>

I adapted this to Mako for mako-based Nikola themes. Might that live here?

Yeah, sure!

Actually, please submit a pull request here:

https://github.com/getnikola/shortcodes