<?php
require_once("../config.php");

$lang = $_GET['lang'];
if(!preg_match('/[a-z]{2}/',$lang)) exit;

$sql = "SELECT * FROM langxref WHERE language = '$lang'";
$result = mysql_query($sql,$con) or die("<tree><root id='0'></root></tree>");

if(mysql_num_rows($result)==0){
	// language root
	$sql = "INSERT INTO node VALUES('',0,'root_$lang',0,0)";
	$result = mysql_query($sql,$con) or die("<tree><root id='0'></root></tree>");
	$lang_id = mysql_insert_id();
	
	// A default node
	$sql = "INSERT INTO node VALUES('',$lang_id,'$lang default node',0,0)";
	$result = mysql_query($sql,$con) or die("<tree><root id='0'></root></tree>");
	$default_id = mysql_insert_id();

	// A default page
	$sql = "INSERT INTO page VALUES($default_id,'')";
	$result = mysql_query($sql,$con) or die("<tree><root id='0'></root></tree>");

	$sql = "INSERT INTO langxref VALUES('',$lang_id,'$lang')";
	$result = mysql_query($sql,$con) or die("<tree><root id='0'></root></tree>");
	$id = $lang_id;	
}else{
	$id = mysql_result($result, 0, 'node_id');	
}


$label = '';
$xml = "<tree>";
header("Content-Type: text/xml");
echo parseTree($id, $label, $xml, $con, false). "</tree>";


function parseTree($node, $label, $xml, $con, $child=true){
	$sql = "SELECT * FROM node WHERE parent_id=$node ORDER BY node_position";
	$result = mysql_query($sql,$con) or die("<tree><root id='0'></root></tree>");
	$n = mysql_num_rows($result);
	
	if($n==0){
		$xml .= "<leaf label='" . htmlspecialchars( $label, ENT_QUOTES, 'UTF-8' ) . "' ref='$node' />";
	}else{
		// root needed for selection but not display
		if($child) $xml .= "<folder label='" . htmlspecialchars( $label, ENT_QUOTES, 'UTF-8') . "' ref='$node'>";
	
		for($f=0;$f<$n;$f++){
			$nodex = mysql_result($result, $f, 'node_id');
			$label = mysql_result($result, $f, 'label');
			$xml = parseTree($nodex, $label, $xml, $con);
		}
		if($child) $xml .= "</folder>"; // not root
	}
	
	return $xml;
	
}

?>