Kirby v2: Shrink large images on upload

config.php

<?php

// Copy this code into your config.php file
// Replace the default $maxDimension to meet your needs
// Read more about Kirby's Panel hooks at https://getkirby.com/docs/panel/developers/hooks

// Shrink large images on upload
kirby()->hook('panel.file.upload', 'shrinkImage');
kirby()->hook('panel.file.replace', 'shrinkImage');
function shrinkImage($file, $maxDimension = 1000) {
  try {
    if ($file->type() == 'image' and ($file->width() > $maxDimension or $file->height() > $maxDimension)) {
      
      // Get original file path
      $originalPath = $file->dir().'/'.$file->filename();

      // Create a thumb and get its path
      $resized = $file->resize($maxDimension,$maxDimension);
      $resizedPath = $resized->dir().'/'.$resized->filename();

      // Replace the original file with the resized one
      copy($resizedPath, $originalPath);
      unlink($resizedPath);

    }
  } catch(Exception $e) {
    return response::error($e->getMessage());
  }
}

?>

@samnabi in replace hook there must be another variable.

Changing line 10 solves the problem:
function shrinkImage($file, $oldFile, $maxDimension = 1000) {

How to keep the two images ? The original and the thumb, with different name ?