function bbp_update_topic_engagements( $topic_id = 0 ) {

	// Is a reply
	if ( bbp_is_reply( $topic_id ) ) {

		// Bail if reply isn't published
		if ( ! bbp_is_reply_published( $topic_id ) ) {
			return;
		}

		$author_id = bbp_get_reply_author_id( $topic_id );
		$topic_id  = bbp_get_reply_topic_id( $topic_id );

	// Is a topic
	} elseif ( bbp_is_topic( $topic_id ) ) {

		// Bail if topic isn't published
		if ( ! bbp_is_topic_published( $topic_id ) ) {
			return;
		}

		$author_id = bbp_get_topic_author_id( $topic_id );
		$topic_id  = bbp_get_topic_id( $topic_id );

	// Is unknown
	} else {
		return;
	}

	// Bail if topic is not public
	if ( ! bbp_is_topic_public( $topic_id ) ) {
		return;
	}

	// Return whether engagement was added
	return bbp_add_user_engagement( $author_id, $topic_id );
}