class.ilXML2DOM.php

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<?php

/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/


class XMLStruct
{
        var $childs = array();  // child nodes
        var     $parent;                        // parent node
        var $name;                              // tag name
        var $content = array(); // tag content
        var $attrs;                             // tag attributes

        function XMLStruct($a_name = "", $a_attrs = array())
        {
                $this->name = $a_name;
                $this->attrs = $a_attrs;
        }

        function append($a_name, $a_attrs)
        {
                $struct = new XMLStruct($a_name, $a_attrs);
                $struct->parent =& $GLOBALS["lastObj"];

                $GLOBALS["lastObj"] =& $struct;
                $this->childs[] =& $struct;
        }

        function setParent()
        {
                $GLOBALS["lastObj"] =& $GLOBALS["lastObj"]->parent;
        }

        function setContent($a_data)
        {
//echo "<br>XMLStruct:setContent-".$this->name."-$a_data-";
                $this->content[] = $a_data;
        }

        function insert(&$dom, &$node)
        {
                $newNode = $dom->create_element($this->name);
                if ($this->content != "")
                {
                        $newNode->set_content(implode("", $this->content));
                }
                if (is_array($this->attrs))
                {
                        #vd($this->attrs);
                        reset ($this->attrs);
                        while (list ($key, $val) = each ($this->attrs)) {
                                $newNode->set_attribute($key, $val);
                        }
                }
                $node = $node->append_child($newNode);
                for ($j = 0; $j < count($this->childs); $j++)
                {
                        $this->childs[$j]->insert($dom, $node);
                }
                $node = $node->parent_node();
        }
}

class XML2DOM
{

        function XML2DOM($a_xml)
        {
                $xml_parser = xml_parser_create("UTF-8");
                xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, false);
                xml_set_object($xml_parser, $this);
                xml_set_element_handler($xml_parser, "startElement", "endElement");
                xml_set_character_data_handler($xml_parser, "characterData");

                if (!xml_parse($xml_parser, $a_xml, true))
                {
                        die(sprintf("XML error: %s at line %d",
                            xml_error_string(xml_get_error_code($xml_parser)),
                            xml_get_current_line_number($xml_parser)));
                }
                xml_parser_free($xml_parser);
        }

        function clean(&$attr)
        {
                if(is_array($attr))
                {
                        foreach($attr as $key => $value)
                        {
                                $attr[$key] = preg_replace("/&(?!amp;|lt;|gt;|quot;)/","&amp;",$attr[$key]);
                                $attr[$key] = preg_replace("/\"/","&quot;",$attr[$key]);
                                $attr[$key] = preg_replace("/</","&lt;",$attr[$key]);
                                $attr[$key] = preg_replace("/>/","&gt;",$attr[$key]);
                        }
                }
                return $attr;
        }


        function startElement($a_parser, $a_name, $a_attrs)
        {
                if (!is_object($this->xmlStruct))
                {
                        #vd($a_attrs);
                        $this->xmlStruct = new XMLStruct($a_name, $a_attrs);
                        $GLOBALS["lastObj"] =& $this->xmlStruct;
                }
                else
                {
                        $a_attrs = $this->clean($a_attrs);
                        #var_dump("<pre>",++$counter," ",$a_name," -> ",$a_attrs,"<pre>");
                        $GLOBALS["lastObj"]->append($a_name, $a_attrs);
                }
        }

        function endElement($a_parser, $a_name)
        {
                $GLOBALS["lastObj"]->setParent();
        }

        function characterData($a_parser, $a_data)
        {
                $a_data = preg_replace("/&/","&amp;",$a_data);

                $GLOBALS["lastObj"]->setContent($a_data);
        }

        function insertNode(&$dom, &$node)
        {
                $node = $this->xmlStruct->insert($dom, $node);
        }
}