classes/class.ilDOMUtil.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 ilDOMUtil
{

        function setFirstOptionalElement(&$doc, &$parent_node, $a_node_name, $a_successors,
                $a_content, $a_attributes, $a_remove_childs = true)
        {
                $search = $a_successors;
                $search[] = $a_node_name;

                $childs = $parent_node->child_nodes();
                $cnt_childs = count($childs);
                $found = false;
//echo "A";
                foreach($childs as $child)
                {
                        $child_name = $child->node_name();
//echo "B$child_name";
                        if (in_array($child_name, $search))
                        {
//echo "C";
                                $found = true;
                                break;
                        }
                }
                // didn't find element
                if(!$found)
                {
                        $new_node =& $doc->create_element($a_node_name);
                        $new_node =& $parent_node->append_child($new_node);
                        if ($a_content != "")
                        {
                                $new_node->set_content($a_content);
                        }
                        ilDOMUtil::set_attributes($new_node, $a_attributes);
                }
                else
                {
                        if ($child_name == $a_node_name)
                        {
                                if ($a_remove_childs)
                                {
                                        $childs2 = $child->child_nodes();
                                        for($i=0; $i<count($childs2); $i++)
                                        {
                                                $child->remove_child($childs2[$i]);
                                        }
                                }
                                if ($a_content != "")
                                {
                                        $child->set_content($a_content);
                                }
                                ilDOMUtil::set_attributes($child, $a_attributes);
                        }
                        else
                        {
                                $new_node =& $doc->create_element($a_node_name);
                                $new_node =& $child->insert_before($new_node, $child);
                                if ($a_content != "")
                                {
                                        $new_node->set_content($a_content);
                                }
                                ilDOMUtil::set_attributes($new_node, $a_attributes);
                        }
                }
        }

        function set_attributes(&$a_node, $a_attributes)
        {
                foreach ($a_attributes as $attribute => $value)
                {
                        if ($value != "")
                        {
                                $a_node->set_attribute($attribute, $value);
                        }
                        else
                        {
                                if ($a_node->has_attribute($attibute))
                                {
                                        $a_node->remove_attribute($attribute);
                                }
                        }
                }
        }

        function deleteAllChildsByName(&$a_parent, $a_node_names)
        {
                $childs = $a_parent->child_nodes();
                foreach($childs as $child)
                {
                        $child_name = $child->node_name();
                        if (in_array($child_name, $a_node_names))
                        {
                                $child->unlink_node();
                        }
                }
        }

} // END class.ilDOMUtil
?>