public function column_default( $item, $column_name ) {
    $base_url = remove_query_arg( 'paged' );
    switch ( $column_name ) {
      case 'download' :
        $download     = new EDD_Download( $item[ $column_name ] );
        $column_value = ! empty( $item['price_id'] )
          ? edd_get_download_name( $download->ID, $item['price_id'] )
          : edd_get_download_name( $download->ID );

        return '<a href="' . esc_url( add_query_arg( 'download', absint( $download->ID ), $base_url ) ) . '" >' . esc_html( $column_value ) . '</a>';
      case 'customer' :
        return ! empty( $item[ 'customer' ]->id )
          ? '<a href="' . esc_url( add_query_arg( 'customer', absint( $item['customer']->id ), $base_url ) ) . '">' . esc_html( $item['customer']->name ) . '</a>'
          : '&mdash;';

      case 'payment_id' :
        $number = edd_get_payment_number( $item['payment_id'] );
        return ! empty( $number )
          ? '<a href="' . esc_url( edd_get_admin_url( array( 'page' => 'edd-payment-history', 'view' => 'view-order-details', 'id' => absint( $item['payment_id'] ) ) ) ) . '">' . esc_html( $number ) . '</a>'
          : '&mdash;';
      case 'ip' :
        return '<a href="' . esc_url( 'https://ipinfo.io/' . esc_attr( $item['ip'] ) )  . '" target="_blank" rel="noopener noreferrer">' . esc_html( $item['ip'] )  . '</a>';
      case 'file':
        return ! empty( $item['file'] )
          ? esc_html( $item['file'] )
          : '&mdash;';
      default:
        return $item[ $column_name ];
    }
  }