CommandQueue.java

package fr.Alphart.BAT.Modules.Core;

import java.util.AbstractMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import net.md_5.bungee.api.CommandSender;
import net.md_5.bungee.api.ProxyServer;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

public class CommandQueue {
	/**
	 * Store command which are waiting for a confirmation (/bat confirm) ... <br>
	 * Check at the confirm command execution if the command timestamp is
	 * expired <br>
	 * Key : player name <br>
	 * Value: Entry: K: expiration timemstamp; V: command
	 */
	private static Map<String, Entry<Long, String>> preExecCommand = Maps.newHashMap();
	/**
	 * Store the name of the sender which are executing a queued command
	 */
	private static List<String> executingQueuedCommand = Lists.newArrayList();

	public static String queueCommand(final CommandSender sender, final String command) {
		preExecCommand.put(sender.getName(), new AbstractMap.SimpleEntry<Long, String>(
				System.currentTimeMillis() + 15000, command));
		return "You must confirm your command using";
	}

	public static boolean isExecutingQueueCommand(final CommandSender sender) {
		return executingQueuedCommand.contains(sender.getName());
	}

	public static void removeFromExecutingQueueCommand(final CommandSender sender) {
		executingQueuedCommand.remove(sender.getName());
	}

	/**
	 * Execute the queued command of the sender if he has one
	 * 
	 * @param sender
	 * @return true if a command has been executed. False if no command was
	 *         queued
	 */
	public static boolean executeQueueCommand(final CommandSender sender) {
		final Entry<Long, String> entry = preExecCommand.get(sender.getName());
		if (entry != null) {
			preExecCommand.remove(sender.getName());
			if (entry.getKey() > System.currentTimeMillis()) {
				executingQueuedCommand.add(sender.getName());
				ProxyServer.getInstance().getPluginManager().dispatchCommand(sender, entry.getValue());
				return true;
			}
		}
		return false;
	}

	public static void clearQueuedCommand(final CommandSender sender) {
		executingQueuedCommand.remove(sender.getName());
		preExecCommand.remove(sender.getName());
	}
}