AttributeBehaivor - modified find result attribute the DRY way

gistfile1.php

// AttributeBehaivor
// ==========================
//  Simple way to modified your model find results, 
//  Either be value filtering, building virtual attribute or filtering
//  Cleanup your afterFind callbacks 
// 
// Example
// ----------------------
// class Article extends AppModel {
//   $actsAs = array(
//     'Attribute' => array('body', 'permalink')
//   );
//  
//   function body($article) {
//     $article = $article['Article'];
//     $markdown = new Markdown($article['body']);
//     return $markdown->toHTML();
//   }
//   
//   function permalink($article) {
//     $article = $article['Article'];
//     return date('/Y/m/d/', strtotime($article['published_at']) . $article['permalink'];
//   }
// }


<?php
class AttributeBehavior extends ModelBehavior {
    function setup(&$model, $config = array()) {
        if (is_string($config))
            $config = array($config);

        $this->settings[$model->alias] = $config;   
    }
    
    function afterFind(&$model, $results = array(), $primary = false) {
        $attributes = $this->settings[$model->alias];
        if ($primary && isset($results[0][$model->alias])) {
            foreach($results as $i => $result) {
                foreach ($attributes as $attr) {
                    if (method_exists($model, $attr) && !is_null($tmp = $model->$attr($result))) {
                        $results[$i][$model->alias][$attr] = $tmp;
                    } 
                }
            }
        } 
        elseif (isset($results[$model->alias])) {
            foreach ($attributes as $attr) {
                if (method_exists($model, $attr) &&  !is_null($tmp = $model->$attr($result))) {
                    $results[$model->alias][$attr] = $tmp; 
                }
            }
        }
        return $results;
    }
} 
?>