jidaikobo-shibata/a11yc

<?php
/**
 * * A11yc\Validate\Check\SameUrlsShouldHaveSameText
 *
 * @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 SameUrlsShouldHaveSameText extends Validate
{
    /**
     * same_urls_should_have_same_text
     * NOTE: some screen readers read anchor's title attribute.
     * and user cannot understand that title is exist or not.
     *
     * @param String $url
     * @return Void
     */
    public static function check($url)
    {
        Validate\Set::log($url, 'same_urls_should_have_same_text', self::$unspec, 1);

        // urls
        $str = Element\Get::ignoredHtml($url);
        $ms = Element\Get::elementsByRe($str, 'ignores', 'anchors_and_values');
        if ( ! $ms[1])
        {
            Validate\Set::log($url, 'same_urls_should_have_same_text', self::$unspec, 4);
            return;
        }

        $urls = array();
        foreach ($ms[1] as $k => $v)
        {
            if (Element::isIgnorable($ms[0][$k])) continue;

            $attrs = Element\Get::attributes($v);

            if ( ! isset($attrs['href'])) continue;
            $each_url = Util::enuniqueUri($attrs['href']);

            // strip m except for alt
            $text = $ms[2][$k];
            preg_match_all("/\<\w+ +?[^\>]*?alt *?= *?[\"']([^\"']*?)[\"'][^\>]*?\>/", $text, $mms);
            if ($mms)
            {
                foreach (array_keys($mms[0]) as $kk)
                {
                    $text = str_replace($mms[0][$kk], $mms[1][$kk], $text);
                }
            }
            $text = strip_tags($text);
            $text = trim($text);
            $text = preg_replace("/\s{2,}/i", ' ', $text);
            $tstr = $ms[0][$k];

            // check
            if ( ! array_key_exists($each_url, $urls))
            {
                $urls[$each_url] = $text;
                Validate\Set::log($url, 'same_urls_should_have_same_text', $tstr, 3);
            }
            // ouch! same text
            else if ($urls[$each_url] != $text)
            {
                Validate\Set::error(
                    $url,
                    'same_urls_should_have_same_text',
                    $k,
                    $tstr,
                    $each_url.': ('.mb_strlen($urls[$each_url], "UTF-8").') "'.$urls[$each_url].'" OR ('.mb_strlen($text, "UTF-8").') "'.$text.'"'
                );
            }
        }
        static::addErrorToHtml($url, 'same_urls_should_have_same_text', static::$error_ids[$url], 'ignores_comment_out');
    }
}