Add Badge to New products - wordpress

Question

i'm trying to make a change on my Woocomerce Store. I want to add a badge to my New Products, my theme doesn't support this so i want to re-use a function that i find for Sale Products and Apply to New products but i'm not finding how to change it to make it work.
I have the next function that works for add percent to sale badge, i want just to modify for New products only adding the span with the class and text.
function custom_product_sale_flash( $output, $post, $product ) {
global $product;
if($product->is_on_sale()) {
if($product->is_type( 'variable' ) )
{
$regular_price = $product->get_variation_regular_price();
$sale_price = $product->get_variation_price();
} else {
$regular_price = $product->get_regular_price();
$sale_price = $product->get_sale_price();
}
$percent_off = (($regular_price - $sale_price) / $regular_price) * 100;
return '<span class="onsale">' . round($percent_off) . '% OFF</span>';
}
}
add_filter( 'woocommerce_sale_flash', 'custom_product_sale_flash', 11, 3 );
Thank you in advance.

Answer 1

You can use one of the actions used in the file templates/content-product.php to hook into the rendering of the HTML.
add_action('woocommerce_before_shop_loop_item_title', function() {
global $post;
$days = 5;
$offset = $days*60*60*24;
if ( get_post_time() < date('U') - $offset )
return '<span class="new-product">NEW</span>';
}
});