gistfile1.php

<?php

    public function beforeSave(Event $event, Entity $entity, ArrayObject $options, ProfferPath $path = null)
    {
        foreach ($this->config() as $field => $settings) {
            if ($entity->has($field) && is_array($entity->get($field)) &&
                $entity->get($field)['error'] === UPLOAD_ERR_OK) {

                if (!$path) {
                    $path = new ProfferPath($this->_table, $entity, $field, $settings);
                }
                $path->createPathFolder();

                if ($this->moveUploadedFile($entity->get($field)['tmp_name'], $path->fullPath())) {
                    $entity->set($field, $entity->get($field)['name']);
                    $entity->set($settings['dir'], $path->getSeed());

                    // Don't generate thumbnails for non-images
                    if (getimagesize($path->fullPath()) !== false) {
                        $this->makeThumbs($field, $path);
                    }
                } else {
                    throw new Exception('Cannot move file');
                }
            }
        }

        return true;
    }