/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package bradswebdavclient.util;

import java.lang.reflect.Method;
import javax.swing.JOptionPane;

/**
 *
 * http://www.centerkey.com/java/browser/
 */
public class BareBonesBrowserLaunch {

  private static final String errMsg = "Error attempting to launch web browser";

  public static void openURL(String url) {
    String osName = System.getProperty("os.name");
    try {
      if (osName.startsWith("Mac OS")) {
        Class fileMgr = Class.forName("com.apple.eio.FileManager");
        Method openURL = fileMgr.getDeclaredMethod("openURL", new Class[]{String.class});
        openURL.invoke(null, new Object[]{url});
      } else if (osName.startsWith("Windows")) {
        Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
      } else { //assume Unix or Linux 
        String[] browsers = {"firefox", "opera", "konqueror", "epiphany", "mozilla", "netscape"};
        String browser = null;
        for (int count = 0; count < browsers.length && browser == null; count++) {
          if (Runtime.getRuntime().exec(new String[]{"which", browsers[count]}).waitFor() == 0) {
            browser = browsers[count];
          }
        }
        if (browser == null) {
          throw new Exception("Could not find web browser");
        } else {
          Runtime.getRuntime().exec(new String[]{browser, url});
        }
      }
    } catch (Exception e) {
      JOptionPane.showMessageDialog(null, errMsg + ":\n" + e.getLocalizedMessage());
    }
  }
}