class.ilBookmarkImportExport.php

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<?php

/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilBookmarkImportExport
{
        function _parseFile($file)
        {
                if (file_exists($file) && is_file($file))
                {
                        $fp     = fopen($file, "r-");
                        while ($line=fgets($fp))
                        {
                                $line=trim($line);
                                if (preg_match('/<!DOCTYPE NETSCAPE-Bookmark-file-1>/i', $line)) {
                                        return ilBookmarkImportExport::__parseNetscape($fp);
                                }
                        }
                }
                return false;
        }
        function __parseNetscape(&$fp)
        {
                $result=array();
                $parent=array();
                $start_id=0;
                $id=0;
                $ok=false;
                while ($line=fgets($fp))
                {
                        $line=trim($line);
                        if (preg_match('/<DL>/i',$line))
                        {
                                $parent_id=$id;
                        }
                        elseif (preg_match('/<\/DL>/i',$line))
                        {
                                $parent_id=array_pop($parent);
                        }
                        elseif (preg_match('/<DD>(.+)$/i',$line,$match))
                        {
                                // extract description
                                $desc=ilBookmarkImportExport::_convertCharset(trim($match[1]),$charset);
                                $desc=ilBookmarkImportExport::_decodeEntities($desc);
                                $result[$parent_id][$id]['description']=strip_tags($desc);
                        }
                        elseif (preg_match('/<DT><H3[^>]*>(.*)<\/H3>/i',$line,$match))
                        {
                                //bookmark folder
                                array_push($parent,$parent_id);
                                $name=ilBookmarkImportExport::_convertCharset(trim($match[1]),$charset);
                                $name=ilBookmarkImportExport::_decodeEntities($name);
                                $id++;
                                $result[$parent_id][$id]=array(
                                        'type'=>'bmf',
                                        'title'=>strip_tags($name),
                                );
                        }
                        elseif (preg_match('/<DT><A HREF="([^"]*)[^>]*>(.*)<\/A>/i', $line,     $match))
                        {
                                $id++;
                                // extract url and title
                                $url=ilBookmarkImportExport::_convertCharset(trim($match[1]),$charset);
                                $url=ilBookmarkImportExport::_decodeEntities($url);
                                $name=ilBookmarkImportExport::_convertCharset(trim($match[2]),$charset);
                                $name=ilBookmarkImportExport::_decodeEntities($name);
                                // extract dates
                                if (preg_match("/ADD_DATE=\"([^\"]*)/i", $line, $match)) $add_date = $match[1]; else $add_date=0;
                                if (preg_match("/LAST_VISIT=\"([^\"]*)/i", $line, $match)) $visited = $match[1]; else $visited=0;
                                if (preg_match("/LAST_MODIFIED=\"([^\"]*)/i", $line, $match)) $modified = $match[1]; else $modified=0;
                                $result[$parent_id][$id]=array(
                                        'type'=>'bm',
                                        'target'=>strip_tags($url),
                                        'title'=>strip_tags($name),
                                        'add_date'=>$add_date,
                                        'visited'=>$visited,
                                        'modified'=>$modified,
                                );
                        }
                        elseif (preg_match("/<META\s+HTTP-EQUIV=\"Content-Type\".+CONTENT=\"([^\"]*)\"/i", $line, $match))
                        {
                                preg_match("/charset=([^ ]+)/", $match[1], $match);
                                $charset=$match[1];
                        }
                }
                return $result;
        }
        function _exportBookmark ($obj_ids,$recursive = true,$title = '')
        {
                $htmlCont='<!DOCTYPE NETSCAPE-Bookmark-file-1>'."\n";
                $htmlCont.='<!-- Created by ilias - www.ilias.de -->'."\n";
                $htmlCont.='<!-- on '.date('r').' -->'."\n\n";
                $htmlCont.='<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">'."\n";
                $htmlCont.='<TITLE>'.ilUtil::prepareFormOutput($title).'</TITLE>'."\n";
                $htmlCont.='<H1>'.ilUtil::prepareFormOutput($title).'</H1>'."\n\n";
                $htmlCont.='<DL><p>'."\n";
                foreach ($obj_ids as $obj_id) {
                        $object = ilBookmarkFolder::getObject($obj_id);
                        $htmlCont.=ilBookmarkImportExport::__parseExport($object,1,$recursive);
                }
                $htmlCont.='</DL><p>'."\n";
//echo htmlentities($htmlCont); exit;
                return $htmlCont;
        }
        function __parseExport ($object,$depth=1,$recursive = true)
        {
                switch ($object['type'])
                {
                        case 'bm':
                                $result.=str_repeat("\t",$depth);
                                $result.='<DT><A HREF="'.ilUtil::prepareFormOutput($object['target']).'" ';
                                $result.='ADD_DATE="'.intval(0).'" ';
                                $result.='LAST_VISIT="'.intval(0).'" ';
                                $result.='LAST_MODIFIED="'.intval(0).'">';
                                $result.=ilUtil::prepareFormOutput($object['title']).'</A>'."\n";
                                if ($object['description']) $result.='<DD>'.
                                        ilUtil::prepareFormOutput($object['description'])."\n";
                        break;
                        case 'bmf':
                                $result.=str_repeat("\t",$depth).'<DT><H3 ADD_DATE="0">'.
                                        ilUtil::prepareFormOutput($object['title']).'</H3>'."\n";
                                if ($object['description']) $result.='<DD>'.
                                        ilUtil::prepareFormOutput($object['description'])."\n";
                                $result.=str_repeat("\t",$depth).'<DL><p>'."\n";
                                if ($recursive)
                                {
                                        $depth++;
                                        $sub_objects=ilBookmarkFolder::getObjects($object['child']);
                                        foreach ($sub_objects as $sub_object)
                                        {
                                                $result.=ilBookmarkImportExport::__parseExport($sub_object,
                                                        $depth,$recursive);
                                        }
                                        $depth--;
                                }
                                $result.=str_repeat("\t",$depth).'</DL><p>'."\n";
                        break;
                }
                return $result;
        }
        function _decodeEntities($string)
        {
                if (function_exists('html_entity_decode'))
                {
                        $string= html_entity_decode($string,ENT_QUOTES,"ISO-8859-15"); #NOTE: UTF-8 does not work!
                }
                else
                {
                        $trans_table = array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES));
                        $string = strtr($string, $trans_table );
                }
                $string= preg_replace_callback(
            '/&#(\d+);/m',
            function($hit){
                return chr($hit[1]);
            },
            $string
        ); #decimal notation
                $string= preg_replace_callback(
            '/&#x([a-f0-9]+);/mi',
            function($hit) {
                return chr(hexdec($hit[1]));
            },
            $string
        );  #hex notation
                return $string;
        }
        function _convertCharset($string,$from_charset='',$to_charset='UTF-8')
        {
                if (extension_loaded("mbstring"))
                {
                        if (!$from_charset)
                        {
                                // try to detect charset
                                mb_detect_order("ASCII, JIS, UTF-8, EUC-JP, SJIS, ISO-8859-15, Windows-1252");
                                $from_charset=mb_detect_encoding ($string);
                        }
                        if (strtoupper($from_charset)!=$to_charset)
                        {
                                return @mb_convert_encoding($string,$to_charset,$from_charset);
                        }
                }
                return $string;
        }
}
?>