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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 * 
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 * 
 * ...or...
 * 
 * 2) The terms of the Apache License, Version 2.0.
 * 
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.forge.deploy;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class ZipExploder {

  public static void explode (File zipFile, File outputDir)
    throws IOException {

    explode(zipFile, outputDir, false);
  }

  public static void explode (File zipFile, File outputDir, boolean verbose)
    throws IOException {

    Path outputPath;

    Files.createDirectories(outputPath = outputDir.toPath());

    try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(zipFile))) {

      ZipEntry zipEntry;
      byte[] buffer = new byte[2048];

      while ((zipEntry = zipInputStream.getNextEntry()) != null) {
        if (verbose) {
          System.out.println("Expanding " + zipEntry.getName() + "...");
        }

        Path entryPath = outputPath.resolve(zipEntry.getName());

        Files.createDirectories(entryPath.getParent());
        try (OutputStream fileOutputStream = Files.newOutputStream(entryPath, StandardOpenOption.WRITE, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING)) {

          int bytesRead;

          while ((bytesRead = zipInputStream.read(buffer)) >= 0) {
            fileOutputStream.write(buffer, 0, bytesRead);
          }
        }
      }
    }
  }
}