WordPress - Better latest posts sidebar menu widget with active states

latest-posts.php

<?php 
// Get the poststype of the current post
$posttype = get_post_type();

$obj = get_post_type_object( $posttype );

$args = array (
	'post_type'          => $posttype,
	'post_status'        => 'publish',
	'post_count'		     => 5
);

$query = new WP_Query( $args );

if ( $query->have_posts() ) : ?>

	<nav id="subnavi" class="widget">

		<header class="widget-header">
		
			<h3>
				Latest <span class="posttype-name"><?php echo $obj->labels->name; ?></span>
			</h3>

		</header>

		<ul class="sub-menu">
	
		<?php while ( $query->have_posts() ) :

			$query->the_post();

			$queried_object = get_queried_object();

			if( $queried_object->ID == get_the_ID() ):
			// Add active class if this is the current post
			$class = 'current_page_item';
			else:
			// Add no class if this is not the current post
			$class = '';
			endif;
			?>
      
      <?php // print the list items with the correct classes ?>
			<li<?php echo $class !='' ? ' class="' . $class . '"' : '';?>><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>

		<?php endwhile; ?>

		</ul>

	</nav>

<?php endif;

wp_reset_postdata();

?>