lots of necessary plumbing

packages/client/src/components/Table.tsx

@@ -1,22 +1,10 @@
-import {
+import { Accessor, createContext, For, onCleanup, Show } from "solid-js";
-	Accessor,
-	createContext,
-	createEffect,
-	createSignal,
-	For,
-	onCleanup,
-	Show,
-} from "solid-js";
-import { SimplePlayerView } from "../../../server/src/games/simple";
-import api, { fromWebsocket } from "../api";
-import { me, playerColor, profile } from "../profile";
-import { fromEvents, Stream, stream } from "kefir";
-import Bus from "kefir-bus";
-import { createObservable, createObservableWithInit, cx, WSEvent } from "../fn";
-import { EdenWS } from "@elysiajs/eden/treaty";
 import { TWsIn, TWsOut } from "../../../server/src/table";
-import Player from "./Player";
+import api, { fromWebsocket } from "../api";
+import { createObservable, createObservableWithInit, cx } from "../fn";
+import { me } from "../profile";
 import Game from "./Game";
+import Player from "./Player";
 
 export const TableContext = createContext<{
 	players: Accessor<string[]>;
@@ -95,10 +83,10 @@ export default (props: { tableKey: string }) => {
 				<Show when={view() == null}>
 					<div class="absolute center">
 						<button
-							onClick={() => ws.send({ startGame: true })}
+							onClick={() => ws.send({ ready: true })}
 							class="button p-1 "
 						>
-							Start Game!
+							Ready
 						</button>
 					</div>
 				</Show>

packages/server/src/api.ts

@@ -1,9 +1,9 @@
 import { Elysia, t } from "elysia";
 import {
+	getSimplePlayerView,
 	SimpleAction,
+	SimpleConfiguration,
 	SimpleGameState,
-	getKnowledge,
-	getView,
 } from "./games/simple";
 import { human } from "./human";
 import dayjs from "dayjs";
@@ -11,6 +11,7 @@ import db from "./db";
 import { liveTable, WsOut, WsIn } from "./table";
 import { Human } from "@prisma/client";
 import _ from "lodash";
+import { combine } from "kefir";
 
 const api = new Elysia({ prefix: "/api" })
 	.post("/whoami", async ({ cookie: { token } }) => {
@@ -73,18 +74,29 @@ const api = new Elysia({ prefix: "/api" })
 			},
 			send,
 		}) {
-			const table = liveTable<SimpleGameState, SimpleAction>(tableKey);
+			const table = liveTable<
+				SimpleConfiguration,
+				SimpleGameState,
+				SimpleAction
+			>(tableKey);
 
-			table.outputs.playersPresent
+			table.outputs.playersPresent.onValue((players) =>
-				.skipDuplicates((p1, p2) => _.isEqual(new Set(p1), new Set(p2)))
+				send({ players })
-				.onValue((players) => send({ players }));
-			table.outputs.gameState.onValue((gameState) =>
-				send({
-					view:
-						gameState &&
-						getView(getKnowledge(gameState, humanKey), humanKey),
-				})
 			);
+
+			table.outputs.playersReady.onValue((readys) =>
+				send({ playersReady: readys })
+			);
+
+			combine(
+				[table.outputs.gameState],
+				[table.outputs.gameConfig],
+				(state, config) =>
+					state &&
+					config &&
+					getSimplePlayerView(config, state, humanKey)
+			).onValue((view) => send({ view }));
+
 			table.inputs.connectionChanges.emit({
 				humanKey,
 				presence: "joined",
@@ -104,15 +116,15 @@ const api = new Elysia({ prefix: "/api" })
 			body
 		) {
 			const {
-				inputs: { gameProposals, gameStarts, gameActions },
+				inputs: { readys, actions, quits },
 			} = liveTable(tableKey);
 
-			if ("proposeGame" in body) {
+			if ("ready" in body) {
-				gameProposals.emit(body);
+				readys.emit({ humanKey, ...body });
-			} else if ("startGame" in body) {
-				gameStarts.emit(body);
 			} else if ("action" in body) {
-				gameActions.emit({ humanKey, ...body.action });
+				actions.emit({ humanKey, ...body.action });
+			} else if ("quit" in body) {
+				quits.emit({ humanKey });
 			}
 		},
 

packages/server/src/games/simple.ts

@@ -1,104 +1,103 @@
 import { Card, Hand, newDeck, Pile, shuffle, vCard } from "@games/shared/cards";
 import { heq } from "@games/shared/utils";
 
-// omniscient game state
+export type SimpleConfiguration = {
-export type SimpleGameState = {
+	game: "simple";
-	prev?: {
+	players: string[];
-		action: SimpleAction;
-	};
-
-	deck: Pile;
-	players: { [humanId: string]: Hand };
 };
 
-// a particular player's knowledge of the global game state
+// omniscient game state
-export type vSimpleGameState = {
+export type SimpleGameState = {
-	humanId: string;
+	deck: Pile;
-
+	turnIdx: number;
-	deck: Pile<vCard>;
+	playerHands: { [humanKey: string]: Hand };
-	players: { [humanId: string]: Hand<vCard> };
 };
 
 // a particular player's point of view in the game
 export type SimplePlayerView = {
-	humanId: string;
-
 	deckCount: number;
-	playerHandCounts: { [humanId: string]: number };
+	playerTurn: string;
+	playerHandCounts: { [humanKey: string]: number };
 	myHand: Hand<Card>;
 };
 
 export type SimpleAction = { type: "draw" } | { type: "discard"; card: Card };
 
-export const newGame = (players: string[]) => {
+export const newSimpleGameState = (
-	console.log("new game called with", JSON.stringify(players));
+	config: SimpleConfiguration
+): SimpleGameState => {
+	const { players } = config;
 	return {
 		deck: shuffle(newDeck()),
-		players: Object.fromEntries(players.map((humanId) => [humanId, []])),
+		turnIdx: 0,
-	} as SimpleGameState;
+		playerHands: Object.fromEntries(
+			players.map((humanKey) => [humanKey, []])
+		),
+	};
 };
 
-export const getKnowledge = (
+export const getSimplePlayerView = (
+	config: SimpleConfiguration,
 	state: SimpleGameState,
-	humanId: string
+	humanKey: string
-): vSimpleGameState => ({
-	humanId,
-	deck: state.deck.map((_) => null),
-	players: Object.fromEntries(
-		Object.entries(state.players).map(([id, hand]) => [
-			id,
-			hand.map(id === humanId ? (card) => card : (_) => null),
-		])
-	),
-});
-
-export const getView = (
-	state: vSimpleGameState,
-	humanId: string
 ): SimplePlayerView => ({
-	humanId,
 	deckCount: state.deck.length,
-	myHand: state.players[humanId] as Hand,
+	playerTurn: config.players[state.turnIdx],
+	myHand: state.playerHands[humanKey] as Hand,
 	playerHandCounts: Object.fromEntries(
-		Object.entries(state.players)
+		Object.entries(state.playerHands)
-			.filter(([id]) => id != humanId)
+			.filter(([id]) => id != humanKey)
 			.map(([id, hand]) => [id, hand.length])
 	),
 });
 
-export const resolveAction = (
+export const resolveSimpleAction = ({
-	state: SimpleGameState,
+	config,
-	humanId: string,
+	state,
-	action: SimpleAction
+	humanKey,
-): SimpleGameState => {
+	action,
-	console.log("attempting to resolve action", JSON.stringify(action));
+}: {
-	if (!(humanId in state.players)) {
+	config: SimpleConfiguration;
-		throw Error(
+	state: SimpleGameState;
-			`${humanId} is not a player in this game; they cannot perform actions`
+	humanKey: string;
+	action: SimpleAction;
+}): SimpleGameState => {
+	const playerHand = state.playerHands[humanKey];
+	if (playerHand == null) {
+		throw new Error(
+			`${humanKey} is not a player in this game; they cannot perform actions`
 		);
 	}
-	const playerHand = state.players[humanId];
+	if (humanKey != config.players[state.turnIdx]) {
-	if (action.type == "draw") {
+		throw new Error(`It's not ${humanKey}'s turn!`);
-		const [drawn, ...rest] = state.deck;
-		console.log("drew card", JSON.stringify(drawn));
-		return {
-			deck: rest,
-			players: {
-				...state.players,
-				[humanId]: [drawn, ...playerHand],
-			},
-		};
 	}
 
+	const numPlayers = Object.keys(state.playerHands).length;
+	const newTurnIdx = (state.turnIdx + 1) % numPlayers;
+
+	if (action.type == "draw") {
+		const [drawn, ...rest] = state.deck;
+
+		return {
+			deck: rest,
+			playerHands: {
+				...state.playerHands,
+				[humanKey]: [drawn, ...playerHand],
+			},
+			turnIdx: newTurnIdx,
+		};
+	} else {
 		// action.type == discard
-	const index = playerHand.findIndex(heq(action.card));
+		const cardIndex = playerHand.findIndex(heq(action.card));
 		return {
 			deck: [action.card, ...state.deck],
-		players: {
+			playerHands: {
-			...state.players,
+				...state.playerHands,
-			[humanId]: playerHand
+				[humanKey]: playerHand
-				.slice(0, index)
+					.slice(0, cardIndex)
-				.concat(playerHand.slice(index + 1)),
+					.concat(playerHand.slice(cardIndex + 1)),
 			},
+			turnIdx: newTurnIdx,
 		};
+	}
 };

packages/server/src/index.ts

@@ -1,8 +1,7 @@
-import api from "./api";
-import { Elysia, env } from "elysia";
 import { cors } from "@elysiajs/cors";
 import { staticPlugin } from "@elysiajs/static";
-import { error } from "node:console";
+import { Elysia, env } from "elysia";
+import api from "./api";
 
 const port = env.PORT || 5001;
 

packages/server/src/kefir-extension.ts

@@ -6,7 +6,7 @@ export const transform = <
 >(
 	initValue: T,
 	...mutations: Mutations
-): Observable<T, any> =>
+): Observable<T, unknown> =>
 	merge(
 		mutations.map(([source, mutation]) =>
 			source.map((event) => ({ event, mutation }))

packages/server/src/table.ts

@@ -2,59 +2,69 @@ import { t } from "elysia";
 import { combine, Property } from "kefir";
 import Bus, { type Bus as TBus } from "kefir-bus";
 import {
-	newGame,
+	newSimpleGameState,
-	resolveAction,
+	resolveSimpleAction,
 	SimpleAction,
+	SimpleConfiguration,
 	SimpleGameState,
 } from "./games/simple";
 import { transform } from "./kefir-extension";
 
 export const WsOut = t.Object({
 	players: t.Optional(t.Array(t.String())),
+	playersReady: t.Optional(t.Record(t.String(), t.String())),
 	view: t.Optional(t.Any()),
 });
 export type TWsOut = typeof WsOut.static;
 export const WsIn = t.Union([
-	t.Object({ proposeGame: t.String() }),
+	t.Object({ ready: t.Boolean() }),
-	t.Object({ startGame: t.Literal(true) }),
 	t.Object({ action: t.Any() }),
+	t.Object({ quit: t.Literal(true) }),
 ]);
 export type TWsIn = typeof WsIn.static;
 
 type Attributed = { humanKey: string };
-type TablePayload<GameState, GameAction> = {
+type TablePayload<GameConfig, GameState, GameAction> = {
 	inputs: {
 		connectionChanges: TBus<
 			Attributed & { presence: "joined" | "left" },
 			never
 		>;
-		gameProposals: TBus<{ proposeGame: string }, never>;
+
-		gameStarts: TBus<{ startGame: true }, never>;
+		readys: TBus<Attributed & { ready: boolean }, never>;
-		gameActions: TBus<Attributed & GameAction, never>;
+		actions: TBus<Attributed & GameAction, never>;
+		quits: TBus<Attributed, never>;
 	};
 	outputs: {
 		playersPresent: Property<string[], never>;
+		playersReady: Property<{ [key: string]: boolean }, unknown>;
+		gameConfig: Property<GameConfig | null, never>;
 		gameState: Property<GameState | null, never>;
 	};
 };
 
 const tables: {
-	[key: string]: TablePayload<unknown, unknown>;
+	[key: string]: TablePayload<unknown, unknown, unknown>;
 } = {};
 
-export const liveTable = <GameState, GameAction>(key: string) => {
+export const liveTable = <GameConfig, GameState, GameAction>(key: string) => {
 	if (!(key in tables)) {
-		const inputs: TablePayload<GameState, GameAction>["inputs"] = {
+		const inputs: TablePayload<
+			GameConfig,
+			GameState,
+			GameAction
+		>["inputs"] = {
 			connectionChanges: Bus(),
-			gameProposals: Bus(),
+			readys: Bus(),
-			gameStarts: Bus(),
+			actions: Bus(),
-			gameActions: Bus(),
+			quits: Bus(),
 		};
-		const { connectionChanges, gameProposals, gameStarts, gameActions } =
+		const { connectionChanges, readys, actions, quits } = inputs;
-			inputs;
 
 		// =======
-		const playerConnectionCounts = connectionChanges.scan((prev, evt) => {
+
+		const playersPresent = connectionChanges
+			.scan((prev, evt) => {
 				if (evt.presence == "left" && prev[evt.humanKey] == 1) {
 					const { [evt.humanKey]: _, ...rest } = prev;
 					return rest;
@@ -65,28 +75,62 @@ export const liveTable = <GameState, GameAction>(key: string) => {
 						(prev[evt.humanKey] ?? 0) +
 						(evt.presence == "joined" ? 1 : -1),
 				};
-		}, {} as { [key: string]: number });
+			}, {} as { [key: string]: number })
-		const playersPresent = playerConnectionCounts.map((counts) =>
+			.map((counts) => Object.keys(counts));
-			Object.keys(counts)
+
+		const playersReady = transform(
+			{} as { [key: string]: boolean },
+			[
+				playersPresent,
+				(prev, players: string[]) =>
+					Object.fromEntries(
+						players.map((p) => [p, prev[p] ?? false])
+					),
+			],
+			[
+				readys,
+				(prev, evt: { humanKey: string; ready: boolean }) =>
+					prev[evt.humanKey] != null
+						? { ...prev, [evt.humanKey]: evt.ready }
+						: prev,
+			]
 		);
 
+		const gameStarts = playersReady
+			.filter((pr) => Object.values(pr).every((ready) => ready))
+			.map((_) => null);
+
+		const gameConfig = playersPresent.map((players) => ({
+			game: "simple",
+			players,
+		}));
+
 		const gameState = transform(
 			null as SimpleGameState | null,
 			[
-				combine([gameStarts], [playersPresent], (evt, players) => ({
+				combine([gameStarts], [gameConfig], (_, config) => config),
-					...evt,
+				(prev, startConfig: SimpleConfiguration) =>
-					players,
+					prev == null ? newSimpleGameState(startConfig) : prev,
-				})),
-				(prev, evt: { players: string[] }) =>
-					prev == null
-						? (newGame(evt.players) as SimpleGameState)
-						: prev,
 			],
 			[
-				gameActions,
+				combine([actions], [gameConfig], (action, config) => ({
-				(prev, evt: Attributed & SimpleAction) =>
+					action,
+					config,
+				})),
+				(
+					prev,
+					evt: {
+						action: Attributed & SimpleAction;
+						config: SimpleConfiguration;
+					}
+				) =>
 					prev != null
-						? resolveAction(prev, evt.humanKey, evt)
+						? resolveSimpleAction({
+								config: evt.config,
+								state: prev,
+								action: evt.action,
+								humanKey: evt.action.humanKey,
+						  })
 						: prev,
 			]
 		).toProperty();
@@ -95,17 +139,19 @@ export const liveTable = <GameState, GameAction>(key: string) => {
 			inputs,
 			outputs: {
 				playersPresent,
+				playersReady,
+				gameConfig: gameConfig as Property<unknown, never>,
 				gameState: gameState as Property<unknown, never>,
 			},
 		};
 
 		// cleanup
 		tables[key].outputs.playersPresent
-			.slidingWindow(2)
+			.debounce(30000)
-			.filter(([prev, curr]) => prev.length > 0 && curr.length == 0)
+			.filter((players) => players.length === 0)
 			.onValue((_) => {
 				delete tables[key];
 			});
 	}
-	return tables[key] as TablePayload<GameState, GameAction>;
+	return tables[key] as TablePayload<GameConfig, GameState, GameAction>;
 };