function bp_core_get_user_domain( $user_id = 0, $user_nicename = false, $user_login = false ) {

	if ( empty( $user_id ) ) {
		return;
	}

	$username = bp_core_get_username( $user_id, $user_nicename, $user_login );

	if ( bp_is_username_compatibility_mode() ) {
		$username = rawurlencode( $username );
	}

	$after_domain = bp_core_enable_root_profiles() ? $username : bp_get_members_root_slug() . '/' . $username;
	$domain       = trailingslashit( bp_get_root_domain() . '/' . $after_domain );

	// Don't use this filter.  Subject to removal in a future release.
	// Use the 'bp_core_get_user_domain' filter instead.
	$domain       = apply_filters( 'bp_core_get_user_domain_pre_cache', $domain, $user_id, $user_nicename, $user_login );

	/**
	 * Filters the domain for the passed user.
	 *
	 * @since 1.0.1
	 *
	 * @param string $domain        Domain for the passed user.
	 * @param int    $user_id       ID of the passed user.
	 * @param string $user_nicename User nicename of the passed user.
	 * @param string $user_login    User login of the passed user.
	 */
	return apply_filters( 'bp_core_get_user_domain', $domain, $user_id, $user_nicename, $user_login );
}