Initial autoupdater

src/main/java/kcauldron/updater/DefaultUpdateCallback.java

@@ -0,0 +1,74 @@
+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(String version) {
+		mHasUpdate = false;
+		mCurrentVersion = version;
+		mNewVersion = null;
+	}
+
+	@Override
+	public void newVersion(String currentVersion, String newVersion) {
+		mCurrentVersion = currentVersion;
+		mNewVersion = newVersion;
+		if (!mHasUpdate) {
+			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) {
+
+	}
+}