mancala/src/index.ts

import express, { Request, Response } from "express";
import * as http from 'http';
import { decodeText, encodeText } from "./rtmt/byte_util";
import { RTMTWS } from "./rtmt/rtmt_websocket";
import cors from "cors"
import { generateKey } from "./key_factory";
import { MatchMaker } from "./matcmaker";
import { channel_game_move, channel_leave_game, channel_new_game, channel_on_game_crashed, channel_on_game_start, channel_on_game_update, channel_on_game_user_leave } from "./channel_names";
import { Bytes } from "./rtmt/rtmt";
import { createGame, Game, GameMove } from "./mancala";
import morgan from 'morgan';

const app = express();

app.use(cors());
app.use(morgan('dev'));

const server = http.createServer(app);

app.get("/", (req: Request, res: Response) => {
  res.send("Server up and running!");
});

app.get("/register/", (req: Request, res: Response) => {
  res.send(generateKey());
});

const port = process.env.PORT || 5000

server.listen(port, () => {
  console.log(`Server started on port ${port}`);
})

const rtmt = new RTMTWS()

rtmt.initWebSocket(server, (userKey: string) => {
  const game = gameStore.get(userKey)
  if (game) {
    rtmt.sendMessage(userKey, channel_on_game_update, encodeText(JSON.stringify(game)))
  }
})

const matchmaker = new MatchMaker()

rtmt.listenMessage(channel_new_game, (userKey: string, message: Bytes) => {
  matchmaker.find(userKey)
})

const gameStore = new Map<string, Game>()

matchmaker.onPlayersPaired = (userKey1: string, userKey2: string) => {
  const game = createGame(userKey1, userKey2)
  gameStore.set(userKey1, game)
  gameStore.set(userKey2, game)

  const data = encodeText(JSON.stringify(game))
  rtmt.sendMessage(userKey1, channel_on_game_start, data)
  rtmt.sendMessage(userKey2, channel_on_game_start, data)
}

rtmt.listenMessage(channel_game_move, (userKey: string, message: Bytes) => {
  const gameMove: GameMove = JSON.parse(decodeText(message))
  const game = gameStore.get(userKey)
  if (game) {
    try {
      game.moveByIndex(gameMove.index, game.getPlayerNameByKey(userKey))
      const data = encodeText(JSON.stringify(game))
      rtmt.sendMessage(game.player1, channel_on_game_update, data)
      rtmt.sendMessage(game.player2, channel_on_game_update, data)

      if (game.state == "ended") {
        gameStore.delete(game.player1)
        gameStore.delete(game.player2)
      }
    } catch (err : any) {
      console.log(err);
      deleteGame(game)
      const data = encodeText(err.toString())
      rtmt.sendMessage(game.player1, channel_on_game_crashed, data)
      rtmt.sendMessage(game.player2, channel_on_game_crashed, data)
    }

  } else {
    console.log("Game not found!");
  }
})

rtmt.listenMessage(channel_leave_game, (userKey: string, message: Bytes) => {
  const game = gameStore.get(userKey)
  if (game) {
    deleteGame(game)
    const data = encodeText(userKey)
    rtmt.sendMessage(game.player1, channel_on_game_user_leave, data)
    rtmt.sendMessage(game.player2, channel_on_game_user_leave, data)
  }
})

const deleteGame = (game: Game) => {
  if (game) {
    gameStore.delete(game.player1)
    gameStore.delete(game.player2)
  }
}