<?php
/**
 * Media rules.
 *
 * @package A11yMate
 */

namespace A11yMate\Rules\Server;

defined( 'ABSPATH' ) || exit;

/**
 * Captions, autoplay, marquee.
 */
class Media {

	/**
	 * Run the checks.
	 *
	 * @param Context $c Context.
	 * @return void
	 */
	public function run( Context $c ) {
		foreach ( $c->q( '//video' ) as $v ) {
			if ( ! $c->q( ".//track[translate(@kind,'CAPTIONSUBTL','captionsubtl')='captions' or translate(@kind,'CAPTIONSUBTL','captionsubtl')='subtitles']", $v ) ) {
				// A purely decorative muted background loop has no speech to caption.
				if ( $v->hasAttribute( 'muted' ) && ! $v->hasAttribute( 'controls' ) && $v->hasAttribute( 'autoplay' ) ) {
					continue;
				}
				$c->add( 'video-no-captions', $v );
			}
		}
		foreach ( $c->q( '//video[@autoplay] | //audio[@autoplay]' ) as $m ) {
			$audible = ! $m->hasAttribute( 'muted' ) || 'audio' === strtolower( $m->tagName );
			if ( $audible || $m->hasAttribute( 'loop' ) ) {
				$c->add( 'media-autoplay', $m );
			}
		}
		foreach ( $c->q( '//marquee | //blink' ) as $m ) {
			$c->add( 'marquee-blink', $m );
		}
	}
}