class Publication extends DataObject {
   static $db = array(
      'IssueNumber' => 'Varchar(25)',
      'Date' => 'Date'
   );
   
   static $has_one = array(
      'Document' => 'File',
      'PublicationPage' => 'PublicationPage'
   );

   function getCMSFields_forPopup() {
      $datefield = new DateField('Date');
      $datefield->setConfig('showcalendar', true);
      $datefield->setConfig('showdropdown', true);
      $datefield->setConfig('dateformat', 'dd/MM/YYYY');
   
      return new FieldSet(
         new TextField('IssueNumber'),
         $datefield,
         new FileIFrameField('Document')
      );
   }
}

class PublicationPage extends Page {
   
   static $has_many = array(
      'Publications' => 'Publication'
   );
   
   static $has_one = array (
      'RootFolder' => 'Folder'
   );
   
   function onBeforeWrite() {
      parent::onBeforeWrite();
      if($this->ID) {
         $this->RootFolder()->Title = $this->Title;
      }
   }   
   
   function onAfterWrite() {
      if($this->ID) {
         $this->checkFolder();
      }
      parent::onAfterWrite();
   }
   
   function onBeforeDelete() {
      parent::onBeforeDelete();
      $this->RootFolder()->delete();
   }
   
   function checkFolder() {
      if(!$this->RootFolderID) {
         $folder = Folder::findOrMake("PublicationPage-" . $this->ID);
         $folder->Title = $this->Title;
         $folder->write();
         
         $this->RootFolderID = $folder->ID;
         $this->write();
      } else {
         $this->RootFolder()->Title = $this->Title;
         $this->RootFolder()->write();
      }
   }
   
   function getCMSFields() {
      $fields = parent::getCMSFields();
      $manager = new FileDataObjectManager(
         $this,
         'Publications',
         'Publication',
         'Document',
         array(
            'IssueNumber' => 'IssueNumber',
            'Date' => 'Date'),
         'getCMSFields_forPopup'
      );
      $manager->setUploadFolder("PublicationPage-" . $this->ID);
      $manager->setAllowedFileTypes(array ('pdf','doc'));
      
      $fields->addFieldToTab("Root.Content.Publications", $manager);
      return $fields;
   }
}

class PublicationPage_Controller extends Page_Controller {
   public function init() {
      parent::init();
   }
}