<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 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/3_0.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: Hartmut Holzgraefe <hholzgra@php.net>                       |
// |          Christian Stocker <chregu@bitflux.ch>                       |
// +----------------------------------------------------------------------+
//

//

/**
 * helper class for parsing PROPPATCH request bodies
 *
 * @package HTTP_WebDAV_Server
 * @author Hartmut Holzgraefe <hholzgra@php.net>
 * @version 0.99.1dev
 */
class _parse_proppatch
{
    /**
     *
     *
     * @var
     * @access
     */
    public $success;

    /**
     *
     *
     * @var
     * @access
     */
    public $props;

    /**
     *
     *
     * @var
     * @access
     */
    public $depth;

    /**
     *
     *
     * @var
     * @access
     */
    public $mode;

    /**
     *
     *
     * @var
     * @access
     */
    public $current;

    /**
     * constructor
     *
     * @param  string  path of input stream
     * @access public
     */
    public function __construct($path)
    {
        $this->success = true;

        $this->depth = 0;
        $this->props = array();
        $had_input = false;

        $f_in = fopen($path, 'rb');
        if (!$f_in) {
            $this->success = false;
            return;
        }

        $xml_parser = xml_parser_create_ns("UTF-8", " ");

        xml_set_element_handler(
            $xml_parser,
            array(&$this, "_startElement"),
            array(&$this, "_endElement")
        );

        xml_set_character_data_handler(
            $xml_parser,
            array(&$this, "_data")
        );

        xml_parser_set_option(
            $xml_parser,
            XML_OPTION_CASE_FOLDING,
            false
        );

        while ($this->success && !feof($f_in)) {
            $line = fgets($f_in);
            if (is_string($line)) {
                $had_input = true;
                $this->success &= xml_parse($xml_parser, $line, false);
            }
        }

        if ($had_input) {
            $this->success &= xml_parse($xml_parser, "", true);
        }

        xml_parser_free($xml_parser);

        fclose($f_in);
    }

    /**
     * tag start handler
     *
     * @param  resource  parser
     * @param  string    tag name
     * @param  array     tag attributes
     * @return void
     * @access private
     */
    public function _startElement($parser, $name, $attrs)
    {
        if (strstr($name, " ")) {
            list($ns, $tag) = explode(" ", $name);
            if ($ns == "") {
                $this->success = false;
            }
        } else {
            $ns = "";
            $tag = $name;
        }

        if ($this->depth == 1) {
            $this->mode = $tag;
        }

        if ($this->depth == 3) {
            $prop = array("name" => $tag);
            $this->current = array("name" => $tag, "ns" => $ns, "status"=> 200);
            if ($this->mode == "set") {
                $this->current["val"] = "";     // default set val
            }
        }

        if ($this->depth >= 4) {
            $this->current["val"] .= "<$tag";
            foreach ($attr as $key => $val) {
                $this->current["val"] .= ' '.$key.'="'.str_replace('"', '&quot;', $val).'"';
            }
            $this->current["val"] .= ">";
        }



        $this->depth++;
    }

    /**
     * tag end handler
     *
     * @param  resource  parser
     * @param  string    tag name
     * @return void
     * @access private
     */
    public function _endElement($parser, $name)
    {
        if (strstr($name, " ")) {
            list($ns, $tag) = explode(" ", $name);
            if ($ns == "") {
                $this->success = false;
            }
        } else {
            $ns = "";
            $tag = $name;
        }

        $this->depth--;

        if ($this->depth >= 4) {
            $this->current["val"] .= "</$tag>";
        }

        if ($this->depth == 3) {
            if (isset($this->current)) {
                $this->props[] = $this->current;
                unset($this->current);
            }
        }
    }

    /**
     * input data handler
     *
     * @param  resource  parser
     * @param  string    data
     * @return void
     * @access private
     */
    public function _data($parser, $data)
    {
        if (isset($this->current)) {
            $this->current["val"] .= $data;
        }
    }
}
