<?php

/*************************************************

bbtags.php (and tagreplacer) - simple way to use tags like [b]bold[/b] or [url=http://www.somesite.com]my site[/url]
                                            in message boards, guestbooks etc on your own website

home page: www.samscripts.com/scripts/bbtags
support: support.samscripts.com/index.php

licence: freeware / optionally giftware ( www.samscripts.com/donate.php )
author: Sam Yapp
date: 8th September 2002

documentation and examples at www.samscripts.com

*************************************************/


class tagreplacer{

    var $simpletags = array();
    var $callbacks = array();
    var $regextags = array();
    var $replacetags = array();
    var $simpletagscount = 0;

    function addreplace($args){
        if( is_array($args)){
            $this->changingtags = array_merge($this->changingtags, $args);
        }else{
            $this->changingtags[] = $args;
        }
    }

    function addtags($args){
        if( is_array($args) ){
            $this->simpletags = array_merge($this->simpletags,$args);
        }else{
            $this->simpletags[] = $args;
        }
    }

    function addregex($args){
        if( is_array($args) ){
            $this->regextags = array_merge($this->regextags,$args);
        }else{
            $this->regextags[] = $args;
        }
    }

    function tagreplacer($tags = array(), $valuetags = array(),$replacetags = array(), $regextags = array()){
        $this->simpletags = $tags;
        $this->changingtags = $replacetags;
        $this->regextags = $regextags;
        $this->valuetags = $valuetags;
    }

    function dotags($text){
        return preg_replace($this->search, $this->replace, $text);
    }

    function doreplacement(){

        $this->search[0] = "~\[(".join("|", $this->simpletags)."|/".join("|/", $this->simpletags).")\s*?\]~is";
        $this->replace[0] = '<$1>';
        foreach( $this->changingtags as $s=>$r){
            $this->search[] = '~\['.$s.'\](.*?)\[/'.$s.'\]~is';
            $this->replace[] = $r[0].'$1'.$r[1];
        }
        foreach( $this->regextags as $s=>$r){
            $this->search[] = $s;
            $this->replace[] = $r;
        }
        $splitter = "__THIS_SPLITS_IT__";
        $splitmes = array();
        foreach( $this->callbacks as $tag=> $handler){
            $splitmes[] = '~\[('.$tag.')\](.*?)\[/'.$tag.'\]~is';
        }
        $this->text = preg_replace($splitmes, $splitter.'$1_$2'.$splitter, $this->text);
        $parts = preg_split('~'.$splitter.'~is', $this->text);
        $this->text = "";
//        echo "<pre>";
//        print_r($parts);
//        echo "</pre>";
        for( $i = 0; $i < count($parts); $i++){
            if( $i % 2 == 0 ){
                $this->text .= $this->dotags(nl2br(htmlentities($parts[$i])));
            }else{
                $tagpos = strpos($parts[$i], '_');
                $tag = substr($parts[$i], 0, $tagpos);
                $text = substr($parts[$i], $tagpos+1);
                if( is_array($this->callbacks[$tag]) ){
                    $func = $this->callbacks[$tag][1];
                    $obj =&$this->callbacks[$tag][0];
                    $this->text .= $obj->$func($text);
                }else{
                    $func = $this->callbacks[$tag];
                    $this->text .= $func($text);
                }
            }
        }
    }

    function replace($text, $nl2br = false){
        $this->text = &$text;
        $this->doreplacement();
        return $this->text;
    }

    function setcallbacktag($tag, $handler){
        $this->callbacks[$tag] = $handler;
    }

}

class bbtags extends tagreplacer{

    function dophp(&$text, $tagvalue=""){
        ob_start();
        highlight_string($text);
        $text = ob_get_contents();
        ob_end_clean();
        if( $tagvalue == "" ){
            return '<div class="php">'.$text.'</div>';
        }else{
            return '<b>'.$tagvalue.'</b><div class="php">'.$text.'</div>';
        }
    }

    function doeval(&$text){
        ob_start();
        eval($text);
        $text = ob_get_contents();
        ob_end_clean();
        return '<b>Output:</b><div class="eval">'.$text.'</div>';
    }

    function dohtml(&$text){
        return '<div class="html">'.$text.'</div>';
    }

    function docode(&$text){
        $text = '<pre>'.htmlentities($text).'</pre>';
        return $text;
    }

    function bbtags($admin = false){
        $this->callbacks = array();
        $this->simpletags = array("b", "i", "u", "p","ul", "li", "ol", "br");
        $this->changingtags = array("heading" => array('<span style="font-size: 10pt; font-weight: bold; text-decoration:underline">','</span>')); 
        $this->regextags = array('~\[font\s*?=\s*?(.*?)\](.*?)\[/font\s*?\]~is' => '<font family="$1">$2</font>',
                                        '~\[size\s*?=\s*?(.*?)\](.*?)\[/size\s*?\]~is' => '<font size="$1">$2</font>',
                                        '~\[color\s*?=\s*?(.*?)\](.*?)\[/color\s*?]~is' => '<font color="$1">$2</font>',
                                        '~\[url=(.*?)\](.*?)\[/url\]~is' => '<a target="_blank" href="$1">$2</a>',
                                        '~\[url\](.*?)\[/url]~is' => '<a target="_blank" href="$1">$1</a>',
                                        '~\[quote=(.*?)\](.*?)\[/quote\]~is' => '<br><b>Quote from $1:</b><div class="quote">$2</div>',
                                        '~\[label=(.*?)\](.*?)\[/label\]~is' => '<a name="$1"></a>$2',
                                        '~\[quote\](.*?)\[/quote]~is' => '<div class="quote">$1</div>',
                                        '~\[email=(.*?)\](.*?)\[/email\]~is' => '<a href="mailto:$1">$2</a>',
                                        '~\[email\](.*?)\[/email]~is' => '<a href="mailto:$1">$1</a>');

        if( $admin ){
            $this->addregex(array('~\[link=(.*?)\](.*?)\[/link\]~is' => '<a href="$1">$2</a>',
                                        '~\[link\](.*?)\[/link]~is' => '<a href="$1">$1</a>',
                                        '~\[img=(.*?)\](.*?)\[/img\]~is' => '<img src="$2" border="0" alt="$1" />',
                                        '~\[img\](.*?)\[/img]~is' => '<img border="0" alt=""> src="$1" alt="$1">',));
            $this->setcallbacktag("html", array($this, "dohtml"));
            $this->setcallbacktag("eval", array($this, "doeval"));

        }

        $this->setcallbacktag("code", array($this, "docode"));
        $this->setcallbacktag("php", array($this, "dophp"));
    }

}

?>