Manipulate WC Order REST API Response

add_barcode_url_in_api_response.php

/**
 * Add the barcode URL in REST API responses.
 * @since   1.3.24
 * @param   object  $response 	WP_REST_Response
 * @param   object  $object     Order Object
 * @param   object  $request    The request made to WC-API
 * @return  object  $response
 */
function add_barcode_url_in_api_response ( $response, $object, $request ) {
  if ( is_a( $response, 'WP_REST_Response' ) && is_a( $object, 'WC_Order' ) ) {
    $barcode_url = $this->barcode_url( $object->get_id() );

    if ( ! empty( $barcode_url ) ) {
      $response->data['barcode_url'] = $barcode_url;
    }
  }
  return $response;
}
add_filter( 'woocommerce_rest_prepare_shop_order_object', 'add_barcode_url_in_api_response', 30, 3 );

/**
 * Remove the _barcode_image metadata from REST API responses.
 * @since   1.3.1
 * @param   object  $response 	WP_REST_Response
 * @param   object  $object     Order Object
 * @param   object  $request    The request made to WC-API
 * @return  object  $response
 */
function remove_barcode_from_api_response ( $response, $object, $request ) {
  if ( is_a( $response, 'WP_REST_Response' ) && isset( $response->data['meta_data'] ) ) {
    if ( 0 < count( $response->data['meta_data'] ) ) {
      foreach ( $response->data['meta_data'] as $k => $v ) {
        if ( '_barcode_image' == $v->key ) {
          unset( $response->data['meta_data'][$k] );
        }
      }
    }
  }
  return $response;
}
add_filter( 'woocommerce_rest_prepare_shop_order_object', 'remove_barcode_from_api_response', 30, 3 );