Code snippet 10 - For multiplayer space invaders article

server.js

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

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

  newPlayerId = player.clientId;
  playerChannels[newPlayerId] = realtime.channels.get(
    "clientChannel-" + player.clientId
  );

  newPlayerObject = {
    id: newPlayerId,
    x: Math.floor((Math.random() * 1370 + 30) * 1000) / 1000,
    y: 20,
    invaderAvatarType: avatarTypes[randomAvatarSelector()],
    invaderAvatarColor: avatarColors[randomAvatarSelector()],
    score: 0,
    nickname: player.data,
    isAlive: true,
  };
  players[newPlayerId] = newPlayerObject;
  if (totalPlayers === MIN_PLAYERS_TO_START_GAME) {
    startShipAndBullets();
  }
  subscribeToPlayerInput(playerChannels[newPlayerId], newPlayerId);
});