folders_check_folder_access( $folder_id )

function folders_check_folder_access( $folder_id ) {

	$folder = folders_get_folder( $folder_id );

	if ( ! empty( $folder->group_id ) ) {
		return false;
	}

	if ( ! empty( $folder->privacy ) ) {

		if ( 'public' === $folder->privacy ) {
			return true;
		}

		if ( 'loggedin' === $folder->privacy && is_user_logged_in() ) {
			return true;
		}

		if ( is_user_logged_in() && 'friends' === $folder->privacy && friends_check_friendship( get_current_user_id(), $folder->user_id ) ) {
			return true;
		}

		if ( bp_is_my_profile() && $folder->user_id === bp_loggedin_user_domain() && 'onlyme' === $folder->privacy ) {
			return true;
		}
	}

	return false;
}