GameInstance.java

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// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2012 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0
 
package com.google.appinventor.components.runtime.util;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
public class GameInstance {
  private String instanceId;
  private String leader;
 
  // players in the current game
  private List<String> players;
 
  // Use this to store the most recent time stamp of each message type received.
  private Map<String, String> messageTimes;
 
 
  public GameInstance(String instanceId) {
    players = new ArrayList<String>(0);
    messageTimes = new HashMap<String, String>();
    this.instanceId = instanceId;
    this.leader = "";
  }
 
  public String getInstanceId() {
    return instanceId;
  }
 
  public String getLeader() {
    return leader;
  }
 
  public void setLeader(String leader) {
    this.leader = leader;
  }
 
  public PlayerListDelta setPlayers(List<String> newPlayersList) {
    if (newPlayersList.equals(players)) {
      return PlayerListDelta.NO_CHANGE;
    }
    List<String> removed = players;
    List<String> added = new ArrayList<String>(newPlayersList);
    players = new ArrayList<String>(newPlayersList);
 
    added.removeAll(removed);
    removed.removeAll(newPlayersList);
    // This happens if the players list is the same but the ordering
    // has changed for some reason.
    if (added.size() == 0 && removed.size() == 0) {
      return PlayerListDelta.NO_CHANGE;
    }
 
    return new PlayerListDelta(removed, added);
  }
 
  public List<String> getPlayers() {
    return players;
  }
 
  public String getMessageTime(String type) {
    if (messageTimes.containsKey(type)) {
      return messageTimes.get(type);
    }
    return "";
  }
 
  public void putMessageTime(String type, String time) {
    messageTimes.put(type, time);
  }
}