package ij.plugin;
import ij.*;
import ij.gui.*;
import ij.util.Tools;
import java.io.*;
import java.net.*;
import java.util.*;
import java.lang.reflect.*;


/** This plugin implements the Help/Update ImageJ command. */
public class ImageJ_Updater implements PlugIn {
	private static final String URL = "http://wsr.imagej.net";
	private String notes;

	public void run(String arg) {
		if (arg.equals("menus")) {
			updateMenus();
			return;
		}
		if (IJ.getApplet()!=null)
			return;
		URL url = getClass().getResource("/ij/IJ.class");
		String ij_jar = url == null ? null : url.toString().replaceAll("%20", " ");
		if (ij_jar==null || !ij_jar.startsWith("jar:file:")) {
			error("Could not determine location of ij.jar");
			return;
		}
		int exclamation = ij_jar.indexOf('!');
		ij_jar = ij_jar.substring(9, exclamation);
		if (IJ.debugMode) IJ.log("Updater (jar loc): "+ij_jar);
		File file = new File(ij_jar);
		if (!file.exists()) {
			error("File not found: "+file.getPath());
			return;
		}
		if (!file.canWrite()) {
			String msg = "No write access: "+file.getPath();
			error(msg);
			return;
		}
		String[] list = openUrlAsList(URL+"/jars/list.txt");
		if (list==null || list.length==0) {
			error("Error opening "+URL+"/jars/list.txt");
			return;
		}
		int count = list.length + 2;
		String[] versions = new String[count];
		String[] urls = new String[count];
		versions[0] = list[0];
		urls[0] = URL+"/jars/ij.jar";
		for (int i=1; i