Srushtika

function startDownwardMovement(playerId) {
  let interval = setInterval(() => {
    if (players[playerId] && players[playerId].isAlive) {
      players[playerId].y += PLAYER_VERTICAL_INCREMENT;
      players[playerId].score += PLAYER_SCORE_INCREMENT;

      if (players[playerId].y > SHIP_PLATFORM) {
        finishGame(playerId);
        clearInterval(interval);
      }

Srushtika

function subscribeToPlayerInput(channelInstance, playerId) {
  channelInstance.subscribe("pos", (msg) => {
    if (msg.data.keyPressed == "left") {
      if (players[playerId].x - 20 < 20) {
        players[playerId].x = 20;
      } else {
        players[playerId].x -= 20;
      }
    } else if (msg.data.keyPressed == "right") {
      if (players[playerId].x + 20 > 1380) {

Srushtika

function startGameDataTicker() {
  let tickInterval = setInterval(() => {
    if (!gameTickerOn) {
      clearInterval(tickInterval);
    } else {
      bulletOrBlank = "";
      bulletTimer += GAME_TICKER_MS;
      if (bulletTimer >= GAME_TICKER_MS * 5) {
        bulletTimer = 0;
        bulletOrBlank = {

Srushtika

function startShipAndBullets() {
  gameOn = true;

  world = new p2.World({
    gravity: [0, -9.82],
  });
  shipBody = new p2.Body({
    position: [shipX, shipY],
    velocity: [calcRandomVelocity(), 0],
  });

Srushtika

function startGameDataTicker() {}

function subscribeToPlayerInput(channelInstance, playerId) {}

function startDownwardMovement(playerId) {}

function finishGame(playerId) {}

function resetServerState() {}

Srushtika

deadPlayerCh.subscribe("dead-notif", (msg) => {
  players[msg.data.deadPlayerId].isAlive = false;
  killerBulletId = msg.data.killerBulletId;
  alivePlayers--;
  if (alivePlayers == 0) {
    setTimeout(() => {
      finishGame("");
    }, 1000);
  }
});

Srushtika

gameRoom.presence.subscribe("leave", (player) => {
  let leavingPlayer = player.clientId;
  alivePlayers--;
  totalPlayers--;
  delete players[leavingPlayer];
  if (totalPlayers <= 0) {
    resetServerState();
  }
});

Srushtika

gameRoom.presence.subscribe("enter", (player) => {
  let newPlayerId;
  let newPlayerData;
  alivePlayers++;
  totalPlayers++;

  if (totalPlayers === 1) {
    gameTickerOn = true;
    startGameDataTicker();
  }

Srushtika

realtime.connection.once("connected", () => {
  gameRoom = realtime.channels.get("game-room");
  deadPlayerCh = realtime.channels.get("dead-player");
  gameRoom.presence.subscribe("enter", (player) => {});
  gameRoom.presence.subscribe("leave", (player) => {});
  deadPlayerCh.subscribe("dead-notif", (msg) => {});
});

Srushtika

const realtime = Ably.Realtime({
  key: ABLY_API_KEY,
  echoMessages: false,
});

//create a uniqueId to assign to clients on auth
const uniqueId = function () {
  return "id-" + totalPlayers + Math.random().toString(36).substr(2, 16);
};