Handling server updates

updateGame.js

function updateGame(updatePacket) {
  var goal = false;
  if (pongR.game.player1.score() < updatePacket.Game.Player1.Score) {
      goal = true;
  }
  else if (pongR.game.player2.score() < updatePacket.Game.Player2.Score) {
      goal = true;
  }

  var remoteMe = pongR.me.playerNumber === 1 ? updatePacket.Game.Player1 : updatePacket.Game.Player2;
  var remoteOther = pongR.me.playerNumber === 2 ? updatePacket.Game.Player1 : updatePacket.Game.Player2;

  if (goal) {
    pongR.goalTimestamp = new Date().getTime();
    // Only update my last processed input id
    pongR.me.lastProcessedInputId = remoteMe.LastProcessedInputId
    // We also clear history of inputs as we start afresh            
    pongR.game.player1.score(updatePacket.Game.Player1.Score);
    pongR.game.player2.score(updatePacket.Game.Player2.Score);
    // Then reset positions
    ResetPositionsToInitialState(updatePacket.Game);
    // Reset keyboard buffer
    keyboard.reset();
    performCountdown(3);
  }
  else {
    // Me
    updatePlayerState(pongR.me, remoteMe);
    // Let's apply client prediction: let's replay all input commands not yet ack'd by the server and check if we have collisions
    pongR.me.topLeftVertex = computeNewClientPosition();
    checkForCollisionsAndUpdateBallState();

    if (pongR.settings.naive_approach) {
        // Other - we have to update the score and the latest input id processed!   		
        updatePlayerState(pongR.other, remoteOther);
    }
    else {
        pongR.other.score(remoteOther.Score);
        pongR.other.lastProcessedInputId = remoteOther.LastProcessedInputId;
        pongR.other.barDirection = remoteOther.BarDirection;
    }

    pongR.serverUpdates.push(updatePacket);
    var tempDate = new Date();
    pongR.server_time = tempDate.getUTCTime(updatePacket.Timestamp);
    pongR.client_time = pongR.server_time - pongR.settings.net_offset;

    //we limit the buffer in seconds worth of updates
    //update loop rate * buffer seconds = number of samples
    if (pongR.serverUpdates.length >= (66 * pongR.settings.updates_buffer_size)) {
        pongR.serverUpdates.splice(0, 1); // remove the oldest item
    }

    // Ball
    updateBallState(updatePacket.Game.Ball);
  }
};