247 lines
6.6 KiB
JavaScript
247 lines
6.6 KiB
JavaScript
document.addEventListener("alpine:init", () => {
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Alpine.store("remoteState", {
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players: [],
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interval: null,
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currentPlayer: null,
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lastPlayerSwitch: null,
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connected: false,
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isMyTurn: false,
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skipMe: false,
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_client: null,
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_currentPlayerTopic: null,
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_gameStateTopic: null,
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_lastGameState: null,
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_key: null,
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_iv: null,
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_noSleep: null,
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init() {
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this._noSleep = new NoSleep();
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Alpine.effect(() => {
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if (
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this.connected &&
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Object.keys(this.players).indexOf(Alpine.store("localState").id) ===
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-1
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) {
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this._updatePlayers({
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[Alpine.store("localState").id]: Alpine.store("localState").name,
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...this.players,
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});
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}
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});
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Alpine.effect(() => {
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const myTurn = this.currentPlayer == Alpine.store("localState").id;
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if (myTurn && !this.skipMe) {
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this.isMyTurn = true;
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Alpine.store("audio").playDing();
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} else if (myTurn && this.skipMe) {
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this.giveTurnToNextPlayer();
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} else {
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this.isMyTurn = false;
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}
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});
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Alpine.effect(() => {
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if (
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Alpine.store("localState").nextPlayer == null ||
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Alpine.store("localState").nextPlayer ==
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Alpine.store("localState").id ||
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!Object.keys(this.players).includes(
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Alpine.store("localState").nextPlayer
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)
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) {
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const players = Object.keys(this.players).sort();
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const nextPlayer =
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players[
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(players.indexOf(Alpine.store("localState").id) + 1) %
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players.length
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];
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Alpine.store("localState").nextPlayer = nextPlayer;
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}
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});
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Alpine.effect(() => {
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if (this.connected) {
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this.updateInterval(this.interval);
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}
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});
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},
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connect() {
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const that = this;
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const url = "wss://broker.emqx.io:8084/mqtt";
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const keySize = 512;
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const ivSize = 128;
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// derive key from room name
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this._key = CryptoJS.PBKDF2(Alpine.store("localState").room, url, {
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keySize: keySize / 32,
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iterations: 1000,
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});
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// random iv
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this._iv = CryptoJS.PBKDF2(Alpine.store("localState").room, url, {
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keySize: ivSize / 32,
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iterations: 5000,
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});
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const topicPrefix = `im.dorian.whose-turn-is-it.${btoa(
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Alpine.store("localState").room
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)}`;
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this._gameStateTopic = CryptoJS.SHA256(
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this._encrypt(`${topicPrefix}.gameState`)
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).toString();
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this._currentPlayerTopic = CryptoJS.SHA256(
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this._encrypt(`${topicPrefix}.currentPlayer`)
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).toString();
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console.log("Connecting to MQTT broker...");
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console.log("Game state topic:", this._gameStateTopic);
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console.log("Current player topic:", this._currentPlayerTopic);
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const options = {
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// Clean session
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clean: true,
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connectTimeout: 4000,
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// Authentication
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clientId: Alpine.store("localState").id,
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};
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this._client = mqtt.connect(url, options);
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this._client.on("connect", () => {
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setTimeout(() => {
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if (!that.connected) {
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// reset game if not connected after 5 seconds
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that.clear();
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}
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}, 1000 * 4);
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that._client.subscribe(that._gameStateTopic);
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that._client.subscribe(that._currentPlayerTopic);
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});
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this._client.on("message", (topic, message) => {
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// message is Buffer
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message = that._decrypt(message.toString());
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const data = JSON.parse(JSON.parse(message));
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if (topic === that._gameStateTopic) {
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if (data.version !== 1 || !data.players || !data.interval) {
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console.log("Invalid game state, resetting...");
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that.clear();
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return;
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}
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if (!that.connected) {
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that.connected = true;
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}
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console.log("Received game state:", data);
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that._lastGameState = data;
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that.players = data.players;
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that.interval = data.interval;
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} else if (topic === that._currentPlayerTopic) {
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if (!data.id || !data.since) {
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console.log("Invalid current player, resetting...");
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that.clear();
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return;
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}
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if (data.since < that.lastPlayerSwitch) {
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return;
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}
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that.currentPlayer = data.id;
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that.lastPlayerSwitch = data.since;
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}
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});
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},
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giveTurnToNextPlayer() {
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this._noSleep.enable();
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this._updateCurrentPlayer(Alpine.store("localState").nextPlayer);
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},
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disconnect() {
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this._client.end(true);
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this._client = null;
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this.players = [];
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this.currentPlayer = null;
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this.lastPlayerSwitch = null;
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this.connected = false;
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this.isMyTurn = false;
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this._gameStateTopic = null;
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this._currentPlayerTopic = null;
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Alpine.store("localState").nextPlayer = null;
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},
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clear() {
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if (!this.interval) {
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this.interval = 30;
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}
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this._updatePlayers({
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[Alpine.store("localState").id]: Alpine.store("localState").name,
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});
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this._updateCurrentPlayer(Alpine.store("localState").id);
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},
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updateInterval(interval) {
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this.interval = interval;
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this._updateGameState(this.players, interval);
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},
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_updatePlayers(players) {
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this.players = players;
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this._updateGameState(players, this.interval);
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},
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_updateGameState(players, interval) {
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const newGameState = {
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version: 1,
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players: players,
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interval: interval,
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};
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if (
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this._lastGameState &&
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JSON.stringify(this._lastGameState) === JSON.stringify(newGameState)
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)
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return;
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this._lastGameState = newGameState;
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console.log("Updating game state:", newGameState);
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this._client.publish(
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this._gameStateTopic,
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this._encrypt(JSON.stringify(newGameState)),
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{
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qos: 1,
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retain: true,
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}
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);
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},
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_updateCurrentPlayer(id) {
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this._client.publish(
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this._currentPlayerTopic,
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this._encrypt(
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JSON.stringify({
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id: id,
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since: new Date().getTime(),
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})
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),
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{ qos: 1, retain: true }
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);
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},
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_encrypt(data) {
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return CryptoJS.AES.encrypt(JSON.stringify(data), this._key, {
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iv: this._iv,
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}).toString();
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},
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_decrypt(data) {
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const decrypted = CryptoJS.AES.decrypt(data, this._key, { iv: this._iv });
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return decrypted.toString(CryptoJS.enc.Utf8);
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},
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});
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});
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