Timer.java

package ender.timer;

import haven.Coord;
import haven.Label;
import haven.UI;
import haven.Window;

public class Timer {
	private static final int SERVER_RATIO = 3;

	public static long server;
	public static long local;

	private long start;
	private long time;
	private String name;
	private long seconds;
	public Callback updcallback;

	public Timer(long start, long time, String name) {
		this.start = start;
		this.time = time;
		this.name = name;
		TimerController.getInstance().add(this);
	}

	public Timer(long time, String name) {
		this(0, time, name);
	}

	public boolean isWorking() {
		return start != 0;
	}

	public void stop() {
		start = 0;
		if (updcallback != null) {
			updcallback.run(this);
		}
		TimerController.getInstance().save();
	}

	public void start() {
		start = server + SERVER_RATIO * ((System.currentTimeMillis() / 1000) - local);
		TimerController.getInstance().save();
	}

	public void start(long start) {
		this.start = start;
	}

	public synchronized boolean update() {
		long now = System.currentTimeMillis() / 1000;
		seconds = time - now + local - (server - start) / SERVER_RATIO;
		if (seconds <= 0) {
			Window wnd = new Window(new Coord(250, 100), Coord.z, UI.instance.root, "Timer");
			String str;
			if (seconds < -60) {
				str = String.format("%s elapsed since timer named \"%s\"  finished it's work", toString(), name);
			} else {
				str = String.format("Timer named \"%s\" just finished it's work", name);
			}
			new Label(Coord.z, wnd, str);
			wnd.justclose = true;
			wnd.pack();
			return true;
		}
		if (updcallback != null) {
			updcallback.run(this);
		}
		return false;
	}

	public synchronized long getStart() {
		return start;
	}

	public synchronized void setStart(long start) {
		this.start = start;
	}

	public synchronized String getName() {
		return name;
	}

	public synchronized void setName(String name) {
		this.name = name;
	}

	public synchronized void setTime(long time) {
		this.time = time;
	}

	public synchronized long getTime() {
		return time;
	}

	@Override
	public String toString() {
		long t = Math.abs(isWorking() ? seconds : time);
		int h = (int) (t / 3600);
		int m = (int) ((t % 3600) / 60);
		int s = (int) (t % 60);
		return String.format("%d:%02d:%02d", h, m, s);
	}

	public void destroy() {
		TimerController.getInstance().remove(this);
		updcallback = null;
	}

}