convenience plugin to trim and replace all whitespace with a single space char

I had an importer with a lot of string fields and I found myself adding both the "Trim" and "Find replace REGEX" (configured to replace all whitespace with a single space char) plugins to every. single. text. field. For anything more than a handful of text fields this gets old fast. So i created a single plugin that does both.

I'm posting it here for the benefit of others (rename it to remove the '_.patch' added by drupal.org and put it in the 'plugins' directory).

/**
 * @file
 * Trim both sides and replace all whitespace with a single space char.
 */

$plugin = array(
  'form'     => 'feeds_tamper_trim_replace_whitespace_with_single_space_form',
  'callback' => 'feeds_tamper_trim_replace_whitespace_with_single_space_callback',
  'name'     => 'Trim & replace whitespace with a single space',
  'multi'    => 'direct',
  'category' => 'Text',
);

function feeds_tamper_trim_replace_whitespace_with_single_space_form($importer, $element_key, $settings) {
  $form = array();
  $form['help'] = array(
    '#value' => t('This plugin is a combination of the "Trim" plugin and "Find and replace REGEX" plugin configured to replace all whitespace with a single space.'),
  );
  return $form;
}

function feeds_tamper_trim_replace_whitespace_with_single_space_callback($source, $item_key, $element_key, &$field, $settings) {
  $field = preg_replace('/\s{2,}/u' , ' ', trim($field));
}

Feel fee to add it to the module if you like-- seems a very common need for text fields imo.