Saber-Factions/src/main/java/com/massivecraft/factions/util/AutoLeaveProcessTask.java

package com.massivecraft.factions.util;

import java.util.ArrayList;
import java.util.ListIterator;

import org.bukkit.scheduler.BukkitRunnable;

import com.massivecraft.factions.Conf;
import com.massivecraft.factions.Faction;
import com.massivecraft.factions.FPlayer;
import com.massivecraft.factions.FPlayers;
import com.massivecraft.factions.P;
import com.massivecraft.factions.struct.Role;

public class AutoLeaveProcessTask extends BukkitRunnable
{
	private transient boolean readyToGo = false;
	private transient boolean finished = false;
	private transient ArrayList<FPlayer> fplayers;
	private transient ListIterator<FPlayer> iterator;
	private transient double toleranceMillis;

	public AutoLeaveProcessTask()
	{
		fplayers = new ArrayList<FPlayer>(FPlayers.i.get());
		this.iterator = fplayers.listIterator();
		this.toleranceMillis = Conf.autoLeaveAfterDaysOfInactivity * 24 * 60 * 60 * 1000;
		this.readyToGo = true;
		this.finished = false;
	}

	public void run()
	{
		if (Conf.autoLeaveAfterDaysOfInactivity <= 0.0 || Conf.autoLeaveRoutineMaxMillisecondsPerTick <= 0.0)
		{
			this.stop();
			return;
		}

		if ( ! readyToGo) return;
		// this is set so it only does one iteration at a time, no matter how frequently the timer fires
		readyToGo = false;
		// and this is tracked to keep one iteration from dragging on too long and possibly choking the system if there are a very large number of players to go through
		long loopStartTime = System.currentTimeMillis();

		while(iterator.hasNext())
		{
			long now = System.currentTimeMillis();

			// if this iteration has been running for maximum time, stop to take a breather until next tick
			if (now > loopStartTime + Conf.autoLeaveRoutineMaxMillisecondsPerTick)
			{
				readyToGo = true;
				return;
			}

			FPlayer fplayer = iterator.next();
			if (fplayer.isOffline() && now - fplayer.getLastLoginTime() > toleranceMillis)
			{
				if (Conf.logFactionLeave || Conf.logFactionKick)
					P.p.log("Player "+fplayer.getName()+" was auto-removed due to inactivity.");

				// if player is faction admin, sort out the faction since he's going away
				if (fplayer.getRole() == Role.ADMIN)
				{
					Faction faction = fplayer.getFaction();
					if (faction != null)
						fplayer.getFaction().promoteNewLeader();
				}

				fplayer.leave(false);
				iterator.remove();  // go ahead and remove this list's link to the FPlayer object
				fplayer.detach();
			}
		}

		// looks like we've finished
		this.stop();
	}

	// we're done, shut down
	public void stop()
	{
		readyToGo = false;
		finished = true;

		this.cancel();
	}

	public boolean isFinished()
	{
		return finished;
	}
}