Map Magento attachment file to WooCommerce product file

magento_attachments.php

<?php 

//SQL
$mydb = new wpdb('root','root','magento','localhost');
    $rows = $mydb->get_results("
select p.entity_id, p.sku, f.title, f.uploaded_file
from pml_uni_fileuploader f
inner join pml_catalog_product_entity p
on find_in_set(p.entity_id, f.product_ids)
order by p.entity_id
        ");
        
echo count($rows);
    echo "<ul>";
    foreach ($rows as $obj) :
	    echo "<li>".$obj->entity_id." - ".$obj->sku." - ".$obj->title." - ".str_replace('custom/upload/','',$obj->uploaded_file)."</li>";

        $product_id = wc_get_product_id_by_sku($obj->sku);
	    $file_url = 'http://site.dev/wp-content/uploads/woocommerce_uploads/'.str_replace('custom/upload/','',$obj->uploaded_file);

	    $woo_files[$product_id][md5( $file_url )] = array(
		    'name' => $obj->title,
		    'file' => $file_url
	    );

	    update_post_meta( $product_id, '_downloadable', 'yes');
	    update_post_meta( $product_id, '_downloadable_files', $woo_files[$product_id]);
	    update_post_meta( $product_id, '_download_limit', '-1');
	    update_post_meta( $product_id, '_download_expiry', '-1');


	    echo "Product: ".$product_id ." updated!";

    endforeach;
    echo "</ul>";