223 lines
7.3 KiB
TypeScript
223 lines
7.3 KiB
TypeScript
import { fail } from 'assert';
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import * as React from 'react';
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import useWebSocket from 'react-use-websocket';
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import { DeepReadonly } from 'ts-essentials';
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import { assertIsDefined, assertNever, noop, reloadOutdatedPage, websocketUrl } from '../common';
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import { useServerTime } from '../hooks';
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import { version as codiesVersion } from '../metadata.json';
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import { ClientNote, PartialClientNote, ServerNote, State, StatePlayer, TimeResponse, WordPack } from '../protocol';
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import { GameView, Sender } from './gameView';
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import { Loading } from './loading';
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const socketUrl = websocketUrl('/api/ws');
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function useSender(dispatch: (action: PartialClientNote) => void): Sender {
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return React.useMemo<Sender>(() => {
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return {
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reveal: (row: number, col: number) =>
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dispatch({
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method: 'reveal',
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params: {
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row,
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col,
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},
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}),
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newGame: () => dispatch({ method: 'newGame', params: {} }),
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endTurn: () => dispatch({ method: 'endTurn', params: {} }),
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changeNickname: (nickname: string) => dispatch({ method: 'changeNickname', params: { nickname } }),
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changeRole: (spymaster: boolean) => dispatch({ method: 'changeRole', params: { spymaster } }),
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changeTeam: (team: number) => dispatch({ method: 'changeTeam', params: { team } }),
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randomizeTeams: () => dispatch({ method: 'randomizeTeams', params: {} }),
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changePack: (num: number, enable: boolean) => dispatch({ method: 'changePack', params: { num, enable } }),
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changeTurnMode: (timed: boolean) => dispatch({ method: 'changeTurnMode', params: { timed } }),
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changeTurnTime: (seconds: number) => dispatch({ method: 'changeTurnTime', params: { seconds } }),
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addPacks: (packs: WordPack[]) => dispatch({ method: 'addPacks', params: { packs } }),
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removePack: (num: number) => dispatch({ method: 'removePack', params: { num } }),
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changeHideBomb: (hideBomb: boolean) => dispatch({ method: 'changeHideBomb', params: { hideBomb } }),
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};
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}, [dispatch]);
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}
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function usePlayer(state?: State): { pState: StatePlayer; pTeam: number } | undefined {
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return React.useMemo(() => {
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if (!state) {
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return undefined;
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}
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for (let i = 0; i < state.roomState.teams.length; i++) {
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const pState = state.roomState.teams[i].find((p) => p.playerID === state.playerID);
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if (pState) {
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return { pState, pTeam: i };
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}
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}
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fail('Player not found in any team');
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}, [state]);
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}
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const reconnectAttempts = 2;
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function useWS(roomID: string, nickname: string, dead: () => void, onOpen: () => void) {
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const didUnmount = React.useRef(false);
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const retry = React.useRef(0);
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return useWebSocket(socketUrl, {
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// The names here matter; explicitly naming them so that renaming
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// these variables doesn't change the actual wire names.
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//
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// X-CODIES-VERSION would be cleaner, but the WS hook doesn't
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// support anything but query params.
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queryParams: { roomID: roomID, nickname: nickname, codiesVersion: codiesVersion },
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reconnectAttempts,
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onMessage: () => {
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retry.current = 0;
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},
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onOpen,
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onClose: (e: CloseEvent) => {
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if (e.code === 4418) {
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reloadOutdatedPage();
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}
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},
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shouldReconnect: () => {
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if (didUnmount.current) {
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return false;
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}
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retry.current++;
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if (retry.current >= reconnectAttempts) {
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dead();
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return false;
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}
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return true;
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},
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});
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}
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function useSyncedServerTime() {
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const { setOffset } = useServerTime();
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const syncTime = React.useCallback(() => {
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const fn = async () => {
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let bestRTT: number | undefined;
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let offset = 0;
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for (let i = 0; i < 3; i++) {
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const before = Date.now();
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const resp = await fetch('/api/time');
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const after = Date.now();
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const body = await resp.json();
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if (resp.ok) {
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const rtt = (after - before) / 2;
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if (bestRTT !== undefined && rtt > bestRTT) {
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continue;
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}
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bestRTT = rtt;
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const t = TimeResponse.parse(body);
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const serverTime = t.time.getTime() + rtt;
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offset = serverTime - Date.now();
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}
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}
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setOffset(offset);
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};
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fn().catch(noop);
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}, [setOffset]);
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React.useEffect(() => {
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const interval = window.setInterval(() => {
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syncTime();
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}, 10 * 60 * 1000);
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return () => window.clearInterval(interval);
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}, [syncTime]);
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return syncTime;
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}
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type StateAction = { method: 'setState'; state: State } | PartialClientNote;
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function useStateReducer(sendNote: (r: ClientNote) => void) {
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// TODO: Create a new state which contains the server state.
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// TODO: Put sendNote in the state instead of reffing it?
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const sendNoteRef = React.useRef(sendNote);
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sendNoteRef.current = sendNote;
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return React.useCallback(
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(state: State | undefined, action: StateAction): State | undefined => {
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if (state === undefined) {
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if (action.method === 'setState') {
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return action.state;
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}
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return state;
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}
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switch (action.method) {
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case 'setState':
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return action.state;
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default:
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sendNoteRef.current({ ...action, version: state.roomState.version });
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return state;
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}
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},
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[sendNoteRef]
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);
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}
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export interface GameProps {
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roomID: string;
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nickname: string;
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leave: () => void;
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}
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export const Game = (props: DeepReadonly<GameProps>) => {
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const nickname = React.useRef(props.nickname); // Preserve a nickname for use in reconnects.
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const syncTime = useSyncedServerTime();
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const { sendJsonMessage, lastJsonMessage } = useWS(props.roomID, nickname.current, props.leave, syncTime);
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const reducer = useStateReducer(sendJsonMessage);
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const [state, dispatch] = React.useReducer(reducer, undefined);
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const player = usePlayer(state);
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const send = useSender(dispatch);
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React.useEffect(() => {
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if (!lastJsonMessage) {
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return;
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}
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const note = ServerNote.parse(lastJsonMessage);
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switch (note.method) {
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case 'state':
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dispatch({ method: 'setState', state: note.params });
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break;
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default:
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assertNever(note.method);
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}
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}, [lastJsonMessage]);
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if (!state) {
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return <Loading />;
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}
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assertIsDefined(player);
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nickname.current = player.pState.nickname;
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return (
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<GameView
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roomID={props.roomID}
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leave={props.leave}
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send={send}
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state={state.roomState}
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pState={player.pState}
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pTeam={player.pTeam}
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/>
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);
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};
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