Image resize filter for xupload in Yii framework

I was recently testing a wonderful AJAX upload widget xupload for Yii framework and decided that I want to resize the picture after it was uploaded. I found another extension Image that did the trick perfectly, but one question remained: where should I put image resize code, so that I wouldn't have to change the xupload code?

That's when I decided I should learn how to make filters for Yii! I made a file PostUploadFilter.php and put in protected/filters.

<?php
Yii::import('application.extensions.image.Image');
class PostUploadFilter extends CFilter{
protected function preFilter($filterChain)
{
return true; // we have nothing to do here
}

protected function postFilter($filterChain)
{

// first we need the name of our file
$model = new XUploadForm;
$model->file = CUploadedFile::getInstance($model, 'file');
$model->name = $model->file->getName();

// let's find the full path to our file
$path=realpath(Yii::app()->getBasePath()."/../images/uploads/1");
$path=$path.'\\';
// load the image, resize if it's wider than 1000px, save!
$image = new Image($path.$model->name);
if($image->width>1000)
$image->resize(1000,NULL);
$image->save($path.$model->name);

}
}?>

Then I added the filter to my controller.

public function filters()
{
return array(
array('application.filters.PostUploadFilter + upload'),
);
}
We want the filter to work only when the "upload" action takes place, hence the "+ upload".