jidaikobo-shibata/a11yc

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

use A11yc\Model;
use A11yc\Validate;

class Live
{
    /**
     * action view
     *
     * @return Void
     */
    public static function actionView()
    {
        $url = Util::enuniqueUri(Input::param('url', '', FILTER_VALIDATE_URL));
        static::view($url);
    }

    /**
     * view
     *
     * @param String $url
     * @return Void
     */
    public static function view($url)
    {
        // keep head
        $html = Model\Html::fetch($url);
        if ($html === false) Util::error('failed to get HTML');
        $mod_head = self::modifyHead($html);

        // validate
        Validate::url($url);
        $hl_html = Validate\Get::highLightedHtml($url);

        // hl_head
        $hl_head = mb_substr($hl_html, 0, mb_strpos($hl_html, '&lt;/head&gt;') + 13);
        $hl_head = '<div class="a11yc_live_head">'.str_replace(array("\n\r", "\n"), '<br />', $hl_head).'</div>';

        // replace url and errors
        $hl_html = self::replaceUrls($url, $hl_html);
        $hl_html = self::replaceErrorStrs($hl_html);

        // replace head
        $result = $mod_head.mb_substr($hl_html, mb_strpos($hl_html, '</head>') + 7).$hl_head;

        // assign
        View::assign('body', $result, false);
    }

    /**
     * modify head
     *
     * @param String|Bool $html
     * @return String
     */
    private static function modifyHead($html)
    {
        if ( ! is_string($html)) Util::error('invalid HTML was given');

        $head = mb_substr($html, 0, mb_strpos($html, '</head>') + 7);

        // css
        $head = str_replace(
            '</head>',
            '<link rel="stylesheet" type="text/css" media="all" href="'.A11YC_ASSETS_URL.'/css/a11yc_live.css" />'."\n".'</head>',
            $head
        );

        // jQuery
        if (strpos($head, 'jquery') === false)
        {
            $head = str_replace(
                '</head>',
                '<script type="text/javascript" src="'.A11YC_ASSETS_URL.'/js/jquery-1.11.1.min.js"></script>'."\n".'</head>',
                $head
            );
        }

        // js
        $head = str_replace(
            '</head>',
            '<script type="text/javascript" src="'.A11YC_ASSETS_URL.'/js/a11yc_live.js"></script>'."\n".'</head>',
            $head
        );

        return $head;
    }

    /**
     * replace strs
     *
     * @param String $url
     * @param String $html
     * @return String
     */
    public static function replaceUrls($url, $html)
    {

        $settings = Model\Setting::fetchAll();
        if ($settings['base_url'])
        {
            $root = $settings['base_url'];
        }
        else
        {
            $roots = explode('/', $url);
            $root = $roots[0].'//'.$roots[2];
        }
        $html = htmlspecialchars_decode($html, ENT_QUOTES);

        // check depth
        if ($url == $root)
        {
        }
        else
        {
// あとで！
        }

        // replace root relative
        $html = preg_replace(
            array(
                '/src *?= *?"\/(?!\/)/i',
                '/src *?= *?"(?!http|\/)/i',
                '/href *?= *?"\/(?!\/)/i',
                '/href *?= *?"(?!http|\/|#)/i'
            ),
            array(
                'src="'.$root.'/',
                'src="'.$root.'/',
                'href="'.$root.'/',
                'href="'.$root.'/'
            ),
            $html
        );

        return $html;
    }

    /**
     * replace a11yc error strs
     *
     * @param String $html
     * @return String
     */
    private static function replaceErrorStrs($html)
    {
        // remove "back" link
        $html = preg_replace(
            '/\<a href="#index_.+?a11yc_back_link.+?\<\/a\>/i',
            '',
            $html
        );

        // replace strong to span
        $html = preg_replace(
            '/strong class="a11yc_level_(a+?)"/i',
            'span class="a11yc_live_error_wrapper a11yc_level_\1"',
            $html
        );
        $html = str_replace(
            '</strong><!-- a11yc_strong_end -->',
            '</span><!-- a11yc_strong_end -->',
            $html
        );

        // make live valid - style_for_structure
        $error_codes = array(
            'meanless_element',
            'style_for_structure',
            'invalid_tag',
            'suspicious_attributes',
            'titleless_frame',
//            'must_be_numeric_attr',
        );

        foreach ($error_codes as $error_code)
        {
            preg_match_all(
                '/\<span id="'.$error_code.'(.+?) class="([^"]+?)"\>(ERROR!|NOTICE)\<\/span\>\<span class="a11yc_live_error_wrapper a11yc_level_(.+?)"\>\<([^\>]+?)\>\<\/span\>\<!-- a11yc_strong_end --\>/',
                $html,
                $ms
            );

            preg_match_all(
                '/\<span id="'.$error_code.'([^\>]+?)\>(ERROR!|NOTICE)\<\/span\>\<span class="a11yc_live_error_wrapper a11yc_level_(.+?)"\>\<([^\>]+?)\>\<\/span\>\<!-- a11yc_strong_end --\>/',
                $html,
                $ms
            );

            if (isset($ms[0][0]))
            {
                foreach ($ms[0] as $k => $v)
                {
                    $replace = '<span id="'.$error_code.''.$ms[1][$k].'>'.$ms[2][$k].'</span><span class="a11yc_live_error_wrapper a11yc_level_'.$ms[3][$k].'"></span><!-- a11yc_strong_end --><'.$ms[4][$k].'>';
                    $html = str_replace($v, $replace, $html);
                }
            }
        }

        return $html;
    }
}