<?php
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 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.               |
// +----------------------------------------------------------------------+
// | Author: Bertrand Mansion <bmansion@mamasam.com>                      |
// +----------------------------------------------------------------------+
//
// $Id$

require_once('XML/Parser.php');
require_once('XML/Util.php');

/**
* Config parser for XML Files
*
* @author      Bertrand Mansion <bmansion@mamasam.com>
* @package     Config
*/
class Config_Container_XML extends XML_Parser
{
    /**
    * Deep level used for indentation
    *
    * @var  int
    * @access private
    */
    var $_deep = -1;

    /**
    * This class options:
    * version (1.0) : XML version
    * encoding (ISO-8859-1) : XML content encoding
    * name      : like in phparray, name of your config global entity
    * indent    : char used for indentation
    * linebreak : char used for linebreak
    * addDecl   : whether to add the xml declaration at beginning or not
    * useAttr   : whether to use the attributes
    * isFile    : whether the given content is a file or an XML string
    * useCData  : whether to surround data with <![CDATA[...]]>
    *
    * @var  array
    */
    var $options = array('version'   => '1.0',
                         'encoding'  => 'ISO-8859-1',
                         'name'      => '',
                         'indent'    => '  ',
                         'linebreak' => "\n",
                         'addDecl'   => true,
                         'useAttr'   => true,
                         'isFile'    => true,
                         'useCData'  => false);

    /**
    * Container objects
    *
    * @var  array
    */
    var $containers = array();

    /**
    * Constructor
    *
    * @access public
    * @param    string  $options    Options to be used by renderer
    *                               version     : (1.0) XML version
    *                               encoding    : (ISO-8859-1) XML content encoding
    *                               name        : like in phparray, name of your config global entity
    *                               indent      : char used for indentation
    *                               linebreak   : char used for linebreak
    *                               addDecl     : whether to add the xml declaration at beginning or not
    *                               useAttr     : whether to use the attributes
    *                               isFile      : whether the given content is a file or an XML string
    */
    function Config_Container_XML($options = array())
    {
        foreach ($options as $key => $value) {
            $this->options[$key] = $value;
        }
    } // end constructor

    /**
    * Parses the data of the given configuration file
    *
    * @access public
    * @param string $datasrc    path to the configuration file
    * @param object $obj        reference to a config object
    * @return mixed returns a PEAR_ERROR, if error occurs or true if ok
    */
    function &parseDatasrc($datasrc, &$obj)
    {
        $err = true;
        $this->folding = false;
        $this->cdata = null;
        $this->XML_Parser($this->options['encoding'], 'event');
        $this->containers[0] =& $obj->container;
        if (is_string($datasrc)) {
            if ($this->options['isFile']) {
                $err = $this->setInputFile($datasrc);
                if (PEAR::isError($err)) {
                    return $err;
                }
                $err = $this->parse();
            } else {
                $err = $this->parseString($datasrc, true);
            }
        } else {
           $this->setInput($datasrc);
           $err = $this->parse();
        }
        return $err;
    } // end func parseDatasrc

    /**
    * Handler for the xml-data
    *
    * @param mixed  $xp         ignored
    * @param string $elem       name of the element
    * @param array  $attribs    attributes for the generated node
    *
    * @access private
    */
    function startHandler($xp, $elem, &$attribs)
    {
        $container =& new Config_Container('section', $elem, null, $attribs);
        $this->containers[] =& $container;
        return null;
    } // end func startHandler

    /**
    * Handler for the xml-data
    *
    * @param mixed  $xp         ignored
    * @param string $elem       name of the element
    *
    * @access private
    */
    function endHandler($xp, $elem)
    {
        $count = count($this->containers);
        $container =& $this->containers[$count-1];
        $currentSection =& $this->containers[$count-2];
        if (count($container->children) == 0) {
            $container->setType('directive');
            $container->setContent(trim($this->cdata));
        }
        $currentSection->addItem($container);
        array_pop($this->containers);
        $this->cdata = null;
        return null;
    } // end func endHandler

    /*
    * The xml character data handler
    *
    * @param mixed  $xp         ignored
    * @param string $data       PCDATA between tags
    *
    * @access private
    */
    function cdataHandler($xp, $cdata)
    {
        $this->cdata .= $cdata;
    } //  end func cdataHandler

    /**
    * Returns a formatted string of the object
    * @param    object  $obj    Container object to be output as string
    * @access   public
    * @return   string
    */
    function toString(&$obj)
    {
        $indent = '';
        if (!$obj->isRoot()) {
            // no indent for root
            $this->_deep++;
            $indent = str_repeat($this->options['indent'], $this->_deep);
        } else {
            // Initialize string with xml declaration
            $string = '';
            if ($this->options['addDecl']) {
                $string .= XML_Util::getXMLDeclaration($this->options['version'], $this->options['encoding']);
                $string .= $this->options['linebreak'];
            }
            if (!empty($this->options['name'])) {
                $string .= '<'.$this->options['name'].'>'.$this->options['linebreak'];
                $this->_deep++;
                $indent = str_repeat($this->options['indent'], $this->_deep);
            }
        }
        if (!isset($string)) {
            $string = '';
        }
        switch ($obj->type) {
            case 'directive':
                $attributes = ($this->options['useAttr']) ? $obj->attributes : array();
                $string .= $indent.XML_Util::createTag($obj->name, $attributes, $obj->content, null,
                            ($this->options['useCData'] ? XML_UTIL_CDATA_SECTION : XML_UTIL_REPLACE_ENTITIES));
                $string .= $this->options['linebreak'];
                break;
            case 'comment':
                $string .= $indent.'<!-- '.$obj->content.' -->';
                $string .= $this->options['linebreak'];
                break;
            case 'section':
                if (!$obj->isRoot()) {
                    $string = $indent.'<'.$obj->name;
                    $string .= ($this->options['useAttr']) ? XML_Util::attributesToString($obj->attributes) : '';
                }
                if ($children = count($obj->children)) {
                    if (!$obj->isRoot()) {
                        $string .= '>'.$this->options['linebreak'];
                    }
                    for ($i = 0; $i < $children; $i++) {
                        $string .= $this->toString($obj->getChild($i));
                    }
                }
                if (!$obj->isRoot()) {
                    if ($children) {
                        $string .= $indent.'</'.$obj->name.'>'.$this->options['linebreak'];
                    } else {
                        $string .= '/>'.$this->options['linebreak'];
                    }
                } else {
                    if (!empty($this->options['name'])) {
                        $string .= '</'.$this->options['name'].'>'.$this->options['linebreak'];
                    }
                }
                break;
            default:
                $string = '';
        }
        if (!$obj->isRoot()) {
            $this->_deep--;
        }
        return $string;
    } // end func toString
} // end class Config_Container_XML
?>