function bp_legacy_theme_ajax_addremove_friend() {
	if ( ! bp_is_post_request() ) {
		return;
	}

	// Cast fid as an integer.
	$friend_id = (int) $_POST['fid'];

	$user = get_user_by( 'id', $friend_id );
	if ( ! $user ) {
		die( __( 'No member found by that ID.', 'buddypress' ) );
	}

	// Trying to cancel friendship.
	if ( 'is_friend' == BP_Friends_Friendship::check_is_friend( bp_loggedin_user_id(), $friend_id ) ) {
		check_ajax_referer( 'friends_remove_friend' );

		if ( ! friends_remove_friend( bp_loggedin_user_id(), $friend_id ) ) {
			echo __( 'Friendship could not be canceled.', 'buddypress' );
		} else {
			echo '<a id="friend-' . esc_attr( $friend_id ) . '" class="friendship-button not_friends add" rel="add" href="' . wp_nonce_url( bp_loggedin_user_domain() . bp_get_friends_slug() . '/add-friend/' . $friend_id, 'friends_add_friend' ) . '">' . __( 'Add Friend', 'buddypress' ) . '</a>';
		}

	// Trying to request friendship.
	} elseif ( 'not_friends' == BP_Friends_Friendship::check_is_friend( bp_loggedin_user_id(), $friend_id ) ) {
		check_ajax_referer( 'friends_add_friend' );

		if ( ! friends_add_friend( bp_loggedin_user_id(), $friend_id ) ) {
			echo __(' Friendship could not be requested.', 'buddypress' );
		} else {
			echo '<a id="friend-' . esc_attr( $friend_id ) . '" class="remove friendship-button pending_friend requested" rel="remove" href="' . wp_nonce_url( bp_loggedin_user_domain() . bp_get_friends_slug() . '/requests/cancel/' . $friend_id . '/', 'friends_withdraw_friendship' ) . '" class="requested">' . __( 'Cancel Friendship Request', 'buddypress' ) . '</a>';
		}

	// Trying to cancel pending request.
	} elseif ( 'pending' == BP_Friends_Friendship::check_is_friend( bp_loggedin_user_id(), $friend_id ) ) {
		check_ajax_referer( 'friends_withdraw_friendship' );

		if ( friends_withdraw_friendship( bp_loggedin_user_id(), $friend_id ) ) {
			echo '<a id="friend-' . esc_attr( $friend_id ) . '" class="friendship-button not_friends add" rel="add" href="' . wp_nonce_url( bp_loggedin_user_domain() . bp_get_friends_slug() . '/add-friend/' . $friend_id, 'friends_add_friend' ) . '">' . __( 'Add Friend', 'buddypress' ) . '</a>';
		} else {
			echo __("Friendship request could not be cancelled.", 'buddypress');
		}

	// Request already pending.
	} else {
		echo __( 'Request Pending', 'buddypress' );
	}

	exit;
}