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<?php

/**
 * @package     JohnCMS
 * @link        http://johncms.com
 * @copyright   Copyright (C) 2008-2011 JohnCMS Community
 * @license     LICENSE.txt (see attached file)
 * @version     VERSION.txt (see attached file)
 * @author      http://johncms.com/about
 */

defined('_IN_JOHNCMS') or die('Restricted access');

class bbcode extends core
{
    /*
    -----------------------------------------------------------------
    Обработка тэгов и ссылок
    -----------------------------------------------------------------
    */
    public static function tags($var)
    {
        $var = self::parse_time($var);               // Обработка тэга времени
        $var = self::highlight_code($var);           // Подсветка кода
        $var = self::highlight_url($var);            // Обработка ссылок
        $var = self::OLD_highlight_url($var);        // Обработка ссылок в BBcode
        $var = self::highlight_bb($var);             // Обработка ссылок
        return $var;
    }

    /*
    -----------------------------------------------------------------
    Обработка времени
    -----------------------------------------------------------------
    */
    private static function parse_time($var)
    {
        if (!function_exists('process_time')) {
            function process_time($time)
            {
                $shift = (core::$system_set['timeshift'] + core::$user_set['timeshift']) * 3600;
                if($out = strtotime($time)){
                    return date("d.m.Y / H:i", $out + $shift);
                } else {
                    return false;
                }
            }
        }
        return preg_replace(array('#\[time\](.+?)\[\/time\]#se'), array("''.process_time('$1').''"), $var);
    }

    /*
    -----------------------------------------------------------------
    Парсинг ссылок
    -----------------------------------------------------------------
    За основу взята доработанная функция от форума phpBB 3.x.x
    -----------------------------------------------------------------
    */
    public static function highlight_url($text)
    {
        if (!function_exists('url_callback')) {
            function url_callback($type, $whitespace, $url, $relative_url)
            {
                $orig_url = $url;
                $orig_relative = $relative_url;
                $url = htmlspecialchars_decode($url);
                $relative_url = htmlspecialchars_decode($relative_url);
                $text = '';
                $chars = array('<', '>', '"');
                $split = false;
                foreach ($chars as $char) {
                    $next_split = strpos($url, $char);
                    if ($next_split !== false) {
                        $split = ($split !== false) ? min($split, $next_split) : $next_split;
                    }
                }
                if ($split !== false) {
                    $url = substr($url, 0, $split);
                    $relative_url = '';
                } else if ($relative_url) {
                    $split = false;
                    foreach ($chars as $char) {
                        $next_split = strpos($relative_url, $char);
                        if ($next_split !== false) {
                            $split = ($split !== false) ? min($split, $next_split) : $next_split;
                        }
                    }
                    if ($split !== false) {
                        $relative_url = substr($relative_url, 0, $split);
                    }
                }
                $last_char = ($relative_url) ? $relative_url[strlen($relative_url) - 1] : $url[strlen($url) - 1];
                switch ($last_char)
                {
                    case '.':
                    case '?':
                    case '!':
                    case ':':
                    case ',':
                        $append = $last_char;
                        if ($relative_url) $relative_url = substr($relative_url, 0, -1);
                        else $url = substr($url, 0, -1);
                        break;

                    default:
                        $append = '';
                        break;
                }
                $short_url = (mb_strlen($url) > 40) ? mb_substr($url, 0, 30) . ' ... ' . mb_substr($url, -5) : $url;
                switch ($type)
                {
                    case 1:
                        $relative_url = preg_replace('/[&?]sid=[0-9a-f]{32}$/', '', preg_replace('/([&?])sid=[0-9a-f]{32}&/', '$1', $relative_url));
                        $url = $url . '/' . $relative_url;
                        $text = $relative_url;
                        if (!$relative_url) {
                            return $whitespace . $orig_url . '/' . $orig_relative;
                        }
                        break;

                    case 2:
                        $text = $short_url;
                        if (!isset(core::$user_set['direct_url']) || !core::$user_set['direct_url']) {
                            $url = core::$system_set['homeurl'] . '/go.php?url=' . rawurlencode($url);
                        }
                        break;

                    case 3:
                        $url = 'http://' . $url;
                        $text = $short_url;
                        if (!isset(core::$user_set['direct_url']) || !core::$user_set['direct_url']) {
                            $url = core::$system_set['homeurl'] . '/go.php?url=' . rawurlencode($url);
                        }
                        break;

                    case 4:
                        $text = $short_url;
                        $url = 'mailto:' . $url;
                        break;
                }
                $url = htmlspecialchars($url);
                $text = htmlspecialchars($text);
                $append = htmlspecialchars($append);
                return $whitespace . '<a href="' . $url . '">' . $text . '</a>' . $append;
            }
        }

        static $url_match;
        static $url_replace;

        if (!is_array($url_match)) {
            $url_match = $url_replace = array();

            // Обработка внутренние ссылки
            $url_match[] = '#(^|[\n\t (>.])(' . preg_quote(core::$system_set['homeurl'], '#') . ')/((?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})*(?:/(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)?)#ieu';
            $url_replace[] = "url_callback(1, '\$1', '\$2', '\$3')";

            // Обработка обычных ссылок типа xxxx://aaaaa.bbb.cccc. ...
            $url_match[] = '#(^|[\n\t (>.])([a-z][a-z\d+]*:/{2}(??:[a-zа-яё0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})+|[0-9.]+|\[[a-zа-яё0-9.]+:[a-zа-яё0-9.]+:[a-zа-яё0-9.:]+\])(?::\d*)?(?:/(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)?)#ieu';
            $url_replace[] = "url_callback(2, '\$1', '\$2', '')";

            // Обработка сокращенных ссылок, без указания протокола "www.xxxx.yyyy[/zzzz]"
            $url_match[] = '#(^|[\n\t (>])(www\.(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})+(?::\d*)?(?:/(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[a-zа-яё0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)?)#ieu';
            $url_replace[] = "url_callback(3, '\$1', '\$2', '')";
        }
        return preg_replace($url_match, $url_replace, $text);
    }

    /*
    -----------------------------------------------------------------
    Удаление bbCode из текста
    -----------------------------------------------------------------
    */
    static function notags($var = '')
    {
        $var = preg_replace('#\[color=(.+?)\](.+?)\[/color]#si', '$2', $var);
        $var = preg_replace('!\[bg=(#[0-9a-f]{3}|#[0-9a-f]{6}|[a-z\-]+)](.+?)\[/bg]!is', '$2', $var);
        $var = preg_replace('#\[spoiler=(.+?)\](.+?)\