Upgrader.java

package com.maanoo.kickassist;

import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
import java.util.Scanner;

/**
 * Check and upgrades to a new version.
 *
 * @author Akritas Akritidis
 */
public final class Upgrader {

	private static final String location_version = "";
	
	private static final String location_jar = ""; 
	
	private Upgrader() {
	}
	
	public static boolean run() {
		if (existsNewVersion()) {
			return upgrade();
		}
		return false;
	}
	
	private static boolean existsNewVersion() {
		try {
			URL url = new URL(location_version);
			try (Scanner in = new Scanner(url.openStream())) {
				String line = in.nextLine().trim();
				if (line.startsWith(Log.product) && !line.equals(Log.getFullVersion())) {
					return true;
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return false;
	}
	
	private static boolean upgrade() {
		try {
			URL url = new URL(location_jar);
			try (InputStream in = url.openStream()) {
				Files.copy(in, ProjectPaths.FILE_KICKASSIST_JAR, StandardCopyOption.REPLACE_EXISTING);
			}
			return true;
		} catch (Exception e) {
			e.printStackTrace();
		}
		return false;
	}
}