jidaikobo-shibata/a11yc

<?php
/**
 * * A11yc\Validate\Check\ImgInputHasAlt
 *
 * @package    part of A11yc
 * @author     Jidaikobo Inc.
 * @license    The MIT License (MIT)
 * @copyright  Jidaikobo Inc.
 * @link       http://www.jidaikobo.com
 */
namespace A11yc\Validate\Check;

use A11yc\Element;
use A11yc\Validate;

class ImgInputHasAlt extends Validate
{
    /**
     * is img input has alt
     *
     * @return  bool
     */
    public static function check($url)
    {
        Validate\Set::log($url, 'img_input_has_alt', self::$unspec, 1);
        $str = Element\Get::ignoredHtml($url);

        $ms = Element\Get::elementsByRe($str, 'ignores', 'tags');
        if ( ! $ms[0]) return;

        foreach($ms[0] as $k => $m)
        {
            if (substr($m, 0, 6) !== '<input') continue;
            $attrs = Element\Get::attributes($m);
            if ( ! isset($attrs['type'])) continue; // unless type it is recognized as a text at html5
            if (isset($attrs['type']) && $attrs['type'] != 'image') continue;
            $tstr = $ms[0][$k];

            $src = basename(Arr::get($attrs, 'src', ''));

            Validate\Set::errorAndLog(
                 ! isset($attrs['alt']) || empty($attrs['alt']),
                $url,
                'img_input_has_alt',
                $k,
                $tstr,
                $src
            );
        }
        static::addErrorToHtml($url, 'img_input_has_alt', static::$error_ids[$url], 'ignores');
    }
}