silverstripe-userforms/code/editor/EditableFileField.php

<?php
/**
 * Allows a user to add a field that can be used to upload a file
 *
 * @package userforms
 */

class EditableFileField extends EditableFormField {
	
	/**
	 * @see Upload->allowedMaxFileSize
	 * @var int
	 */
	public static $allowed_max_file_size;
	
	/**
	 * @see Upload->allowedExtensions
	 * @var array
	 */
	public static $allowed_extensions = array();
	
	static $singular_name = 'File Upload Field';
	
	static $plural_names = 'File Fields';
	
	public function getFormField() {
		return new FileField($this->Name, $this->Title);
	}
	
	public function getSubmittedFormField() {
		return new SubmittedFileField();
  	}
}