KCauldron-minecraft-server/src/main/java/kcauldron/updater/DefaultUpdateCallback.java

package kcauldron.updater;

import kcauldron.KCauldron;
import kcauldron.KCauldronCommand;
import kcauldron.updater.KVersionRetriever.IVersionCheckCallback;
import net.minecraft.server.MinecraftServer;

import org.bukkit.Bukkit;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.player.PlayerJoinEvent;

public class DefaultUpdateCallback implements IVersionCheckCallback {
    public static DefaultUpdateCallback INSTANCE;

    static {
    	INSTANCE = new DefaultUpdateCallback();
    }

    public void onPlayerJoin(PlayerJoinEvent event) {
    	Player player = event.getPlayer();
    	if (mHasUpdate && hasPermission(player)) {
    		sendUpdate(player);
    	}
    }

    private boolean hasPermission(CommandSender player) {
    	return player.hasPermission(KCauldronCommand.UPDATE);
    }

    private void sendUpdate(CommandSender player) {
    	CommandSenderUpdateCallback.newVersion(player, mCurrentVersion,
    			mNewVersion);
    }

    private boolean mHasUpdate;
    private String mCurrentVersion;
    private String mNewVersion;

    private DefaultUpdateCallback() {
    }

    @Override
    public void upToDate() {
    	mHasUpdate = false;
    	mCurrentVersion = KCauldron.getCurrentVersion();
    	mNewVersion = null;
    }

    @Override
    public void newVersion(String newVersion) {
    	mCurrentVersion = KCauldron.getCurrentVersion();
    	mNewVersion = newVersion;
    	if (!mHasUpdate) {
    		Bukkit.getConsoleSender().sendMessage(
    				"New version of KCauldron avaiable: " + newVersion);
    		for (Player player : Bukkit.getOnlinePlayers()) {
    			if (hasPermission(player)) {
    				sendUpdate(player);
    			}
    		}
    	}
    	mHasUpdate = true;
    	if (MinecraftServer.kcauldronConfig.updatecheckerAutoinstall.getValue()
    			&& !mNewVersion.equals(KCauldron.sNewServerVersion)
    			&& !KCauldron.sUpdateInProgress) {
    		Bukkit.getConsoleSender().sendMessage("Triggering auto update");
    		KCauldronUpdater.initUpdate(Bukkit.getConsoleSender(), newVersion);
    	}
    }

    @Override
    public void error(Throwable t) {

    }
}