WooCommerce API: Add different image sizes and urls to response

woocommerce-api-products-response-image-sizes.php

<?php // Do not include this line when adding the code to an existing file.

add_filter( 'woocommerce_rest_prepare_product_object', 'wc_api_add_image_sizes_products_response', 10, 3 );

/**
 * Add different product image sizes and URLs to the product images response.
 *
 * @param Object $response The response object.
 * @param $post
 * @param $request
 * @return Object
 */
function wc_api_add_image_sizes_products_response( $response, $post, $request ) {
    global $_wp_additional_image_sizes;

    if ( empty( $response->data ) ) {
        return $response;
    }

    foreach ( $response->data['images'] as $key => $image ) {
        foreach ( $_wp_additional_image_sizes as $size => $value ) {
            $image_info = wp_get_attachment_image_src( $image['id'], $size );
            if ( is_array( $image_info ) ) {
            	$response->data['images'][ $key ]['sizes'][ $size ] = $image_info[0];
            }
        }
    }
    return $response;
}