imprint.plugin.php

  /**
   * Add the page parent control to the publish page
   *
   * @param FormUI $form The publish page form
   * @param Post $post The post being edited
   *
   */
  public function action_form_publish ( $form, $post )
  {
    if ( $form->content_type->value == Post::type( 'imprint' ) ) {
      $form->append( 'fieldset', 'imprint_controls', 'Enter details of IMPRINT edition' );
      $form->move_before($form->imprint_controls, $form->title);
      $form->imprint_controls->append( 'file', 'cover', 'null:null', 'Cover', 'formcontrol_file' );
    }
  }

  /**
   * Handle saving of imprint posts
   * @param Post $post The post being updated
   * @param FormUI $form. The form from the publish page
   */
  public function action_publish_post( $post, $form )
  {
    if ( $post->content_type == Post::type( 'imprint' ) ) {
      // uploaded file is availabel at $form->cover->tmp_file
      $target = Site::get_dir('user').'/files/somefilename.foo';
      $result = move_uploaded_file($form->cover->tmp_file, $target);
    }
  }