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<?php

//

// +----------------------------------------------------------------------+

// | PHP Version 4                                                        |

// +----------------------------------------------------------------------+

// | Copyright (c) 1997-2002 The PHP Group                                |

// +----------------------------------------------------------------------+

// | This source file is subject to version 2.02 of the PHP license,      |

// | that is bundled with this package in the file LICENSE, and is        |

// | available at through the world-wide-web at                           |

// | http://www.php.net/license/2_02.txt.                                 |

// | If you did not receive a copy of the PHP license and are unable to   |

// | obtain it through the world-wide-web, please send a note to          |

// | license@php.net so we can mail you a copy immediately.               |

// +----------------------------------------------------------------------+

// | Authors: Bernd Römer <berndr@bonn.edu>                               |

// |          Sebastian Bergmann <sb@sebastian-bergmann.de>               |

// |          Christian Kühn <ck@chkuehn.de> (escape xml entities)        |

// +----------------------------------------------------------------------+

//

// $Id: Node.php,v 1.1 2005-04-18 16:13:31 jpm Exp $

//

/**

* PEAR::XML_Tree_Node

*

* @author  Bernd Römer <berndr@bonn.edu>

* @package XML_Tree

* @version 1.0  16-Aug-2001

*/

class XML_Tree_Node {

    /**

    * Attributes of this node

    *

    * @var  array

    */

    var $attributes;

    /**

    * Children of this node

    *

    * @var  array

    */

    var $children;

    /**

    * Content

    *

    * @var  string

    */

    var $content;

    /**

    * Name

    *

    * @var  string

    */

    var $name;

    /**

    * Constructor

    *

    * @param  string  name

    * @param  string  content

    * @param  array   attributes

    */

    function XML_Tree_Node($name, $content = '', $attributes = array()) {

        $this->attributes = $attributes;

        $this->children   = array();

        $this->set_content($content);

        $this->name       = $name;

    }

    /**

    * Adds a child node to this node.

    *

    * @param  mixed   child

    * @param  string  content

    * @param  array   attributes

    * @return object  reference to new child node

    */

    function &addChild($child, $content = '', $attributes = array()) {

        $index = sizeof($this->children);

        if (is_object($child)) {

            if (strtolower(get_class($child)) == 'xml_tree_node') {

                $this->children[$index] = $child;

            }

            if (strtolower(get_class($child)) == 'xml_tree' && isset($child->root)) {

                $this->children[$index] = $child->root->get_element();

            }

        } else {

            $this->children[$index] = new XML_Tree_Node($child, $content, $attributes);

        }

        return $this->children[$index];

    }

    /**

    * @deprecated

    */

    function &add_child($child, $content = '', $attributes = array()) {

        return $this->addChild($child, $content, $attributes);

    }

    /**

    * clone node and all its children (recursive)

    *

    * @return object reference to the clone-node

    */

    function &clone() {

        $clone=new XML_Tree_Node($this->name,$this->content,$this->attributes);

        $max_child=count($this->children);

        for($i=0;$i<$max_child;$i++) {

            $clone->children[]=$this->children[$i]->clone();

        }

        /* for future use....

            // clone all other vars

            $temp=get_object_vars($this);

            foreach($temp as $varname => $value)

                if (!in_array($varname,array('name','content','attributes','children')))

                    $clone->$varname=$value;

        */

        return($clone);

    }

    /**

    * inserts child ($child) to a specified child-position ($pos)

    *

    * @return  inserted node

    */

    function &insertChild($path,$pos,&$child, $content = '', $attributes = array()) {

        // direct insert of objects useing array_splice() faild :(

        array_splice($this->children,$pos,0,'dummy');

        if (is_object($child)) { // child offered is not instanziated

            // insert a single node

            if (strtolower(get_class($child)) == 'xml_tree_node') {

                $this->children[$pos]=&$child;

            }

            // insert a tree i.e insert root-element

            if (strtolower(get_class($child)) == 'xml_tree' && isset($child->root)) {

                $this->children[$pos]=$child->root->get_element();

            }

        } else { // child offered is not instanziated

            $this->children[$pos]=new XML_Tree_Node($child, $content, $attributes);

        }

        return($this);

    }

    /**

    * @deprecated

    */

    function &insert_child($path,$pos,&$child, $content = '', $attributes = array()) {

        return $this->insertChild($path,$pos,$child, $content, $attributes);

    }

    /**

    * removes child ($pos)

    *

    * @param integer pos position of child in children-list

    *

    * @return  removed node

    */

    function &removeChild($pos) {

        // array_splice() instead of a simple unset() to maintain index-integrity

        return(array_splice($this->children,$pos,1));

    }

    /**

    * @deprecated

    */

    function &remove_child($pos) {

        return $this->removeChild($pos);

    }

    /**

    * Returns text representation of this node.

    *

    * @return  string  xml

    */

    function &get()

    {

        static $deep = -1;

        static $do_ident = true;

        $deep++;

        if ($this->name !== null) {

            $ident = str_repeat('  ', $deep);

            if ($do_ident) {

                $out = $ident . '<' . $this->name;

            } else {

                $out = '<' . $this->name;

            }

            foreach ($this->attributes as $name => $value) {

                $out .= ' ' . $name . '="' . $value . '"';

            }

            $out .= '>' . $this->content;

            if (sizeof($this->children) > 0) {

                $out .= "\n";

                foreach ($this->children as $child) {

                    $out .= $child->get();

                }

            } else {

                $ident = '';

            }

            if ($do_ident) {

                $out .= $ident . '</' . $this->name . ">\n";

            } else {

                $out .= '</' . $this->name . '>';

            }

            $do_ident = true;

        } else {

            $out = $this->content;

            $do_ident = false;

        }

        $deep--;

        return $out;

    }

    /**

    * Gets an attribute by its name.

    *

    * @param  string  name

    * @return string  attribute

    */

    function getAttribute($name) {

        return $this->attributes[strtolower($name)];

    }

    /**

    * @deprecated

    */

    function get_attribute($name) {

        return $this->getAttribute($name);

    }

    /**

    * Gets an element by its 'path'.

    *

    * @param  string  path

    * @return object  element

    */

    function &getElement($path) {

        if (sizeof($path) == 0) {

            return $this;

        }

        $next = array_shift($path);

        return $this->children[$next]->get_element($path);

    }

    /**

    * @deprecated

    */

    function &get_element($path) {

        return $this->getElement($path);

    }

    /**

    * Sets an attribute.

    *

    * @param  string  name

    * @param  string  value

    */

    function setAttribute($name, $value = '') {

        $this->attributes[strtolower($name)] = $value;

    }

    /**

    * @deprecated

    */

    function set_attribute($name, $value = '') {

        return $this->setAttribute($name, $value);

    }

    /**

    * Unsets an attribute.

    *

    * @param  string  name

    */

    function unsetAttribute($name) {

        unset($this->attributes[strtolower($name)]);

    }

    /**

    * @deprecated

    */

    function unset_attribute($name) {

        return $this->unsetAttribute($name);

    }

    /**

    *

    *

    */

    function setContent(&$content)

    {

        $this->content = $this->_xml_entities($content);

    }

    function set_content(&$content)

    {

        return $this->setContent($content);

    }

    /**

    * Escape XML entities.

    *

    * @param   string  xml

    * @return  string  xml

    * @access  private

    */

    function _xml_entities($xml) {

        $xml = str_replace(array('ü', 'Ü', 'ö',

                                 'Ö', 'ä', 'Ä',

                                 'ß'

                                ),

                           array('ü', 'Ü', 'ö',

                                 'Ö', 'ä', 'Ä',

                                 'ß'

                                ),

                           $xml

                          );

        $xml = preg_replace(array("/\&([a-z\d\#]+)\;/i",

                                  "/\&/",

                                  "/\#\|\|([a-z\d\#]+)\|\|\#/i",

                                  "/([^a-zA-Z\d\s\<\>\&\;\.\:\=\"\-\/\%\?\!\'\(\)\[\]\{\}\$\#\+\,\@_])/e"

                                 ),

                            array("#||\\1||#",

                                  "&",

                                  "&\\1;",

                                  "'&#'.ord('\\1').';'"

                                 ),

                            $xml

                           );

        return $xml;

    }

    /**

    * Print text representation of XML tree.

    */

    function dump() {

        echo $this->get();

    }

}

?>