/**
 * Display currently earned badges for author.
 * @param  integer $count   How many posts to display per page
 * @param  integer $author_id ID of the author to display. Defaults to ID 1
 * @return mixed           echo'd badge loop.
 */
function custom_badgeos_user_achievements( $count = 1, $author_id = 1 ) {
	//Use the current user if no specific user specified.
	if ( 1 === absint( $author_id ) ) {
		global $post;
		$author_id = $post->post_author;
	}

	//Re-fetch our data if the transient has expired.
	if ( false === ( $badges = get_transient( 'custom_badgeos_user_achievements' ) ) ) {
		//Grab the user's current list of achievements, by ID
		$ids = badgeos_get_user_earned_achievement_ids( $author_id );

		$types = array();
		foreach( $ids as $id ) :
			//shuffle the badge type into its own array.
			$types[] = get_post_type( $id );
		endforeach;
		//Assign our arguments based on passed in parameters and unique badge types and only earned badges by ID.
		$args = array(
			'posts_per_page' => $count,
			'post_type' => array_unique($types),
			'post__in' => $ids
		);
		$badges = new WP_Query( $args );
		//store our resulting WP_Query object in a transient for one hour.
		set_transient( 'custom_badgeos_user_achievements', $badges, 60*60 );
	}
	//Loop through our badges as we would any other post listing, display the parts we want.
	if( $badges->have_posts() ) : while( $badges->have_posts() ) : $badges->the_post(); ?>
	<?php echo badgeos_get_achievement_post_thumbnail(); ?>
	<span class="badgeos-title-wrap"><?php the_title(); ?></span>
	<?php endwhile; wp_reset_postdata(); endif;
}