<?

/*
 * This file is part of the Science-ation project
 * Science-ation Website: https://science-ation.ca
 *
 * This file was part of the 'Science Fair In A Box' project
 *
 *
 * Copyright (C) 2005 Sci-Tech Ontario Inc <info@scitechontario.org>
 * Copyright (C) 2005 James Grant <james@lightbox.org>
 * Copyright (C) 2024 AlgoLibre Inc. <science-ation@algolibre.io>
 * 
 *
 * 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, version 2.
 *
 * 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

function xmlCreateRecurse($d)
{
    global $indent;
    global $output;
    foreach ($d as $key => $val) {
        if (is_numeric($key)) {
            if ($val['xml_type']) {
                for ($x = 0; $x < $indent; $x++)
                    $output .= ' ';
                $output .= '<' . $val['xml_type'] . ">\n";
                $indent++;
                xmlCreateRecurse($val);
                $indent--;
                for ($x = 0; $x < $indent; $x++)
                    $output .= ' ';
                $output .= '</' . $val['xml_type'] . ">\n";
            } else {
                for ($x = 0; $x < $indent; $x++)
                    $output .= ' ';
                $output .= "<$key>\n";
                $indent++;
                xmlCreateRecurse($val);
                $indent--;
                for ($x = 0; $x < $indent; $x++)
                    $output .= ' ';
                $output .= "</$key>\n";
            }
        } else if (is_array($val)) {
            for ($x = 0; $x < $indent; $x++)
                $output .= ' ';
            $output .= "<$key>\n";
            $indent++;
            xmlCreateRecurse($val);
            $indent--;
            for ($x = 0; $x < $indent; $x++)
                $output .= ' ';
            $output .= "</$key>\n";
        } else {
            if ($key != 'xml_type' && $key != 'projectid' && $key != 'projectdivisions_id') {
                for ($x = 0; $x < $indent; $x++)
                    $output .= ' ';
                $output .= "<$key>$val</$key>\n";
            }
        }
    }
}

// Mainfunction to parse the XML defined by URL
function xml_parsexml($String)
{
    global $Data;
    $Encoding = xml_encoding($String);
    $String = xml_deleteelements($String, '?');
    $String = xml_deleteelements($String, '!');
    $Data = xml_readxml($String, $Data, $Encoding);
    return ($Data);
}

// Get encoding of xml
function xml_encoding($String)
{
    if (substr_count($String, '<?xml')) {
        $Start = strpos($String, '<?xml') + 5;
        $End = strpos($String, '>', $Start);
        $Content = substr($String, $Start, $End - $Start);
        $EncodingStart = strpos($Content, 'encoding="') + 10;
        $EncodingEnd = strpos($Content, '"', $EncodingStart);
        $Encoding = substr($Content, $EncodingStart, $EncodingEnd - $EncodingStart);
    } else {
        $Encoding = '';
    }
    return $Encoding;
}

// Delete elements
function xml_deleteelements($String, $Char)
{
    while (substr_count($String, "<$Char")) {
        $Start = strpos($String, "<$Char");
        $End = strpos($String, '>', $Start + 1) + 1;
        $String = substr($String, 0, $Start) . substr($String, $End);
    }
    return $String;
}

// Read XML and transform into array
function xml_readxml($String, $Data, $Encoding = '')
{
    while ($Node = xml_nextnode($String)) {
        $TmpData = '';
        $Start = strpos($String, '>', strpos($String, "<$Node")) + 1;
        $End = strpos($String, "</$Node>", $Start);
        $ThisContent = trim(substr($String, $Start, $End - $Start));
        $String = trim(substr($String, $End + strlen($Node) + 3));
        if (substr_count($ThisContent, '<')) {
            $TmpData = xml_readxml($ThisContent, $TmpData, $Encoding);
            $Data[$Node][] = $TmpData;
        } else {
            if ($Encoding == 'UTF-8') {
                $ThisContent = utf8_decode($ThisContent);
            }
            $ThisContent = str_replace('&gt;', '>', $ThisContent);
            $ThisContent = str_replace('&lt;', '<', $ThisContent);
            $ThisContent = str_replace('&quote;', '"', $ThisContent);
            $ThisContent = str_replace('&#39;', "'", $ThisContent);
            $ThisContent = str_replace('&amp;', '&', $ThisContent);
            $Data[$Node][] = $ThisContent;
        }
    }
    return $Data;
}

// Get next node
function xml_nextnode($String)
{
    if (substr_count($String, '<') != substr_count($String, '/>')) {
        $Start = strpos($String, '<') + 1;
        while (substr($String, $Start, 1) == '/') {
            if (substr_count($String, '<')) {
                return '';
            }
            $Start = strpos($String, '<', $Start) + 1;
        }
        $End = strpos($String, '>', $Start);
        $Node = substr($String, $Start, $End - $Start);
        if ($Node[strlen($Node) - 1] == '/') {
            $String = substr($String, $End + 1);
            $Node = xml_nextnode($String);
        } else {
            if (substr_count($Node, ' ')) {
                $Node = substr($Node, 0, strpos($String, ' ', $Start) - $Start);
            }
        }
        return $Node;
    }
}