function bbp_recalculate_topic_engagements( $topic_id = 0, $force = false ) {

	// Default return value
	$retval = false;

	// Check post type
	$topic_id = bbp_is_reply( $topic_id )
		? bbp_get_reply_topic_id( $topic_id )
		: bbp_get_topic_id( $topic_id );

	// Bail if no topic ID
	if ( empty( $topic_id ) ) {
		return $retval;
	}

	// Query for engagements
	$old_engagements = bbp_get_topic_engagements( $topic_id );
	$new_engagements = bbp_get_topic_engagements_raw( $topic_id );

	// Sort arrays
	sort( $old_engagements, SORT_NUMERIC );
	sort( $new_engagements, SORT_NUMERIC );

	// Only recalculate on change
	if ( ( true === $force ) || ( $old_engagements !== $new_engagements ) ) {

		// Delete all engagements
		bbp_remove_object_from_all_users( $topic_id, '_bbp_engagement' );

		// Update the voice count for this topic id
		foreach ( $new_engagements as $user_id ) {
			$retval = bbp_add_user_engagement( $user_id, $topic_id );
		}
	}

	// Filter & return
	return (bool) apply_filters( 'bbp_recalculate_user_engagements', $retval, $topic_id );
}