Filters the Custom Redirects for WooCommerce redirect URL (requires http://wc-redirects.com/)

woocommerce-custom-redirects-redirect_url.php

<?php

add_filter( 'woocommerce_custom_redirects_redirect_url', 'wcr_filter_redirect' );
/**
 * Filters the custom redirect URL.
 * Requires Custom Redirects for WooCommerce.
 * @link http://wc-redirects.com/
 *
 * @param  string 	$redirect   	Redirect URL
 * @param  string 	$type       	Redirect type (add-to-cart or after-purchase)
 * @param  int 		$product_id 	ID of product
 *
 * @return string
 */
function wcr_filter_redirect( $redirect, $type, $product_id ) {
	// Logic here
	return $redirect;
}