Using DTE Duplicate how do I auto-update some fields like Publish in the new $ID?

Duplicate, in itself, work fine. However when I duplicate the field I need to:

  {
    extend: "selected",
    text: 'Duplicate',
    action: function ( e, dt, node, config ) {
      // Start in edit mode, and then change to create
      editor
      .edit( table.rows( {selected: true} ).indexes(), {
        title: 'Duplicate record',
        buttons: 'Create from existing'
      } )
      .mode( 'create' );
    }
  },

1) Set publish to No
2) With 2 date field I need to update them the first one to now and the second to 30 days ahead. This code gets those values:

$today = date('Y-m-d');
$date_plus_30 = date('Y-m-d', strtotime("+30 days"));

If not using duplicate I do something like:

  {
    label: 'Date begins (this must be updated)',
    name:  'date_begins',
    default: '<?php echo $today; ?>',
    attr: { placeholder: "Format: YYYY-MM-DD" },
  },

  {
    label: 'Date ends (this must be updated)',
    name:  'date_ends',
    default: '<?php echo $date_plus_30; ?>',
    attr: { placeholder: "Format: YYYY-MM-DD" },
  },

However with duplicate those values get overwritten.