<?php
/**
* ajax image undo function
* @author Logan Cai (cailongqun [at] yahoo [dot] com [dot] cn)
* @link www.phpletter.com
* @since 22/May/2007
*
*/
require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . "inc" . DIRECTORY_SEPARATOR . "config.php");
require_once(CLASS_HISTORY);
$history = new History($_POST['file_path'], $session);
$lastestSessionImageInfo = $history->getLastestRestorable();
echo "{";
$error = "";
$info = "";
if(CONFIG_SYS_VIEW_ONLY)
{
$error = SYS_DISABLED;
}
elseif(empty($_POST['file_path']))
{
$error = IMG_SAVE_EMPTY_PATH;
}elseif(!file_exists($_POST['file_path']))
{
$error = IMG_SAVE_NOT_EXISTS;
}elseif(!isUnderRoot($_POST['file_path']))
{
$error = IMG_SAVE_PATH_DISALLOWED;
}else if(!sizeof($lastestSessionImageInfo))
{
$error = IMG_UNDO_NO_HISTORY_AVAIALBE;
}
else
{
//get the original image which is the lastest session image if any when the system is in demo
$sessionImage = $session->getSessionDir() . $lastestSessionImageInfo['name'];
$originalSessionImageInfo = $history->getOriginalImage();
if(CONFIG_SYS_DEMO_ENABLE && sizeof($originalSessionImageInfo))
{
$originalImage = $session->getSessionDir() . $originalSessionImageInfo['info']['name'];
}else
{
$originalImage = $_POST['file_path'];
}

include_once(CLASS_IMAGE);
$image = new Image();
if($image->loadImage($sessionImage))
{
$imageInfo = $image->getOriginalImageInfo();
if(!@copy($sessionImage, $originalImage))
{
$error = IMG_UNDO_COPY_FAILED;
}else
{

//remove the session image
if(@unlink($sessionImage))
{
$history->restore();
}
//only one left, remove the session original if demo

if($history->getNumRestorable() == 0 && CONFIG_SYS_DEMO_ENABLE && sizeof($originalSessionImageInfo))
{
@unlink($session->getSessionDir() . $originalSessionImageInfo['info']['name']);
$originalImage = $_POST['file_path'];
}
}
$imagePath = $originalImage;

}else
{
$error = IMG_SAVE_IMG_OPEN_FAILED;
}
if(isset($imageInfo))
{
$info .= ",width:" . $imageInfo['width'] . "\n";
$info .= ",height:" . $imageInfo['height'] . "\n";
$info .= ",size:'" . transformFileSize($imageInfo['size']) . "'\n";
$info .= ",path:'" . backslashToSlash($imagePath) . "'\n";
}

}

echo "error:'" . $error . "'\n";
if(isset($image) && is_object($image))
{
$image->DestroyImages();
}
echo $info;
echo ",history:" . ($history->getNumRestorable()) . "\n";
echo "}";
?>