/*

 * Copyright (C) 2008 Google Inc.

 * 

 * Licensed 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 com.google.marvin.androidsays;



import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;

import java.util.zip.ZipFile;



/**

 * Unzips theme files for mem into the appropriate directory on the sdcard.

 * 

 * @author clchen@google.com (Charles L. Chen)

 */

public class Unzipper {



  public static String download(String fileUrl) {

    URLConnection cn;

    try {

      fileUrl = (new URL(new URL(fileUrl), fileUrl)).toString();

      URL url = new URL(fileUrl);

      cn = url.openConnection();

      cn.connect();

      InputStream stream = cn.getInputStream();



      File outputDir = new File("/sdcard/mem/memes/");

      outputDir.mkdirs();

      String filename = fileUrl.substring(fileUrl.lastIndexOf("/") + 1);

      filename = filename.substring(0, filename.indexOf("meme.zip") + 8);



      File outputFile = new File("/sdcard/mem/memes/", filename);

      outputFile.createNewFile();

      FileOutputStream out = new FileOutputStream(outputFile);



      byte buf[] = new byte[16384];

      do {

        int numread = stream.read(buf);

        if (numread <= 0) {

          break;

        } else {

          out.write(buf, 0, numread);

        }

      } while (true);



      stream.close();

      out.close();

      return "/sdcard/mem/memes/" + filename;



    } catch (MalformedURLException e) {

      // TODO Auto-generated catch block

      e.printStackTrace();

      return "";

    } catch (IOException e) {

      // TODO Auto-generated catch block

      e.printStackTrace();

      return "";

    }

  }



  public static void unzip(String fileUrl) {

    try {

      String filename = download(fileUrl);

      ZipFile zip = new ZipFile(filename);

      Enumeration<? extends ZipEntry> zippedFiles = zip.entries();

      while (zippedFiles.hasMoreElements()) {

        ZipEntry entry = zippedFiles.nextElement();

        InputStream is = zip.getInputStream(entry);

        String name = entry.getName();

        File outputFile = new File("/sdcard/mem/themes/" + name);

        String outputPath = outputFile.getCanonicalPath();

        name = outputPath.substring(outputPath.lastIndexOf("/") + 1);

        outputPath = outputPath.substring(0, outputPath.lastIndexOf("/"));

        File outputDir = new File(outputPath);

        outputDir.mkdirs();

        outputFile = new File(outputPath, name);

        outputFile.createNewFile();

        FileOutputStream out = new FileOutputStream(outputFile);



        byte buf[] = new byte[16384];

        do {

          int numread = is.read(buf);

          if (numread <= 0) {

            break;

          } else {

            out.write(buf, 0, numread);

          }

        } while (true);



        is.close();

        out.close();

      }

    } catch (IOException e) {

      // TODO Auto-generated catch block

      e.printStackTrace();

    }

  }

}