<?php

class publicDownloadPage extends Page {

   static $has_many = array (
      'Downloads' => 'Download'
   );
   
   public function getCMSFields() {
$fields = parent::getCMSFields();
$manager = new FileDataObjectManager(
$this,
'Downloads', // relation name
'Download', // class name of the DataObject
'File', // name of the file relation in the DataObject
array(
          'Title' => 'Title',
          'Comment' => 'Comment',
       ), // headings
'getCMSFields_forPopup' // name of the function for the popup fields

);

   
   $fields->addFieldToTab('Root.Content.Files', $manager);
return $fields;
}

}

class publicDownloadPage_Controller extends Page_Controller {

}

class Download extends DataObject {

   static $db = array (
      'Title' => 'Text',
      'Comment' => 'HTMLText',
   );
   static $has_one = array (
      'File' => 'File',
      'publicDownloadPage' => 'publicDownloadPage'
   );
   
   public function getCMSFields_forPopup() {
      $fields = new FieldSet();
      $fields->push(new TextField('Title'));
      $fields->push(new SimpleTinyMCEField('Comment'));
      $fields->push(new FileUploadField('File','Upload files'));
      return $fields;
   }
   
   public function onBeforeWrite() {
      parent::onBeforeWrite();
      if(!$this->Title && $this->FileID) {
         $this->Title = $this->File()->Name;
      }

      if(!$this->Comment) {
         $this->Comment = "None";
      }
   }

}