Code snippet 18 - For multiplayer space invaders article

server.js

function resetServerState() {
  peopleAccessingTheWebsite = 0;
  gameOn = false;
  gameTickerOn = false;
  totalPlayers = 0;
  alivePlayers = 0;
  for (let item in playerChannels) {
     playerChannels[item].unsubscribe();
  }
}