Cancella dalla libreria le immagini dei prodotti eliminati

add_action( 'before_delete_post', 'delete_product_images', 10, 1 );

function delete_product_images( $post_id ) {
	    // Controlla se l'utente ha l'autorizzazione di cancellare i prodotti
		if ( !current_user_can( 'delete_products' ) ) {
			return;
		}
    $product = wc_get_product( $post_id );

    if ( !$product ) {
        return;
    }

    $featured_image_id = $product->get_image_id();
    $image_galleries_id = $product->get_gallery_image_ids();

    if( !empty( $featured_image_id ) ) {
        $is_featured_image_used = is_image_used( $featured_image_id, $post_id );
        if ( !$is_featured_image_used ) {
            wp_delete_attachment( $featured_image_id, true );
        }
    }

    if( !empty( $image_galleries_id ) ) {
        foreach( $image_galleries_id as $single_image_id ) {
            $is_image_used = is_image_used( $single_image_id, $post_id );
            if ( !$is_image_used ) {
                wp_delete_attachment( $single_image_id, true );
            }
        }
    }
}

function is_image_used( $image_id, $current_product_id ) {
    $query = new WP_Query( array(
        'post_type' => 'product',
        'post_status' => 'publish',
        'meta_query' => array(
            'relation' => 'OR',
            array(
                'key' => '_thumbnail_id',
                'value' => $image_id,
                'compare' => '='
            ),
            array(
                'key' => '_product_image_gallery',
                'value' => '"'.$image_id.'"',
                'compare' => 'LIKE'
            )
        ),
        'post__not_in' => array( $current_product_id ),
        'fields' => 'ids',
        'posts_per_page' => -1
    ) );

    return ( $query->have_posts() );
}