public function transform()
{
$content = $this->original_content;
$content = apply_filters('the_content', $content);
// We run kses before AMP conversion due to a kses bug which doesn't allow hyphens (#34105-core).
// Our custom kses handler strips out all not-allowed stuff and leaves in stuff that will be converted (like iframe, img, audio, video).
// Technically, conversion should catch the tags so we shouldn't need to run it after anyway.
$content = AMP_KSES::strip($content);
// Convert HTML to AMP
// see https://github.com/ampproject/amphtml/blob/master/spec/amp-html-format.md#html-tags)
$scripts = array();
$converter = new AMP_Img_Converter($content);
$content = $converter->convert(array('layout' => 'responsive'));
$this->add_scripts($converter->get_scripts());
$converter = new AMP_Iframe_Converter($content);
$content = $converter->convert(array('layout' => 'responsive'));
$this->add_scripts($converter->get_scripts());
return $content;
}
