function bbp_add_user_subscription( $user_id = 0, $object_id = 0, $type = 'post' ) {

	// Bail if not enough info
	if ( empty( $user_id ) || empty( $object_id ) ) {
		return false;
	}

	// Bail if already subscribed
	if ( bbp_is_user_subscribed( $user_id, $object_id, $type ) ) {
		return false;
	}

	// Bail if add fails
	if ( ! bbp_add_user_to_object( $object_id, $user_id, '_bbp_subscription', $type ) ) {
		return false;
	}

	do_action( 'bbp_add_user_subscription', $user_id, $object_id, $type );

	return true;
}