/* Copyright (c) 2014-2016 Chunky committers
 *
 * This file is part of Chunky.
 *
 * Chunky is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Chunky 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 for more details.
 * You should have received a copy of the GNU General Public License
 * along with Chunky.  If not, see <http://www.gnu.org/licenses/>.
 */
package se.llbit.util;

import se.llbit.log.Log;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * Utility class for exporting scenes to zip files.
 *
 * @author Tim De Keyser <aenterprise2@gmail.com>
 */
public class ZipExport {

  /**
   * Export a scene to a zip file.
   *
   * @param archive    zip file to write
   * @param sceneName  zip prefix
   * @param extensions file extensions to include
   */
  public static void zip(File archive, File sceneDir, String sceneName, String[] extensions) {
    try {
      FileOutputStream fos = new FileOutputStream(archive);
      ZipOutputStream zos = new ZipOutputStream(fos);

      for (String extension : extensions) {
        addToZipFile(zos, sceneDir, sceneName, sceneName + extension);
      }

      zos.close();
      fos.close();
    } catch (IOException e) {
      Log.error(e);
    }
  }

  private static void addToZipFile(ZipOutputStream zos, File sceneDir, String prefix,
      String fileName) throws IOException {
    File file = new File(sceneDir, fileName);
    FileInputStream fis = new FileInputStream(file);
    ZipEntry zipEntry = new ZipEntry(prefix + "/" + fileName);
    zos.putNextEntry(zipEntry);

    byte[] bytes = new byte[4096];
    int length;
    while ((length = fis.read(bytes)) >= 0) {
      zos.write(bytes, 0, length);
    }
    zos.closeEntry();
    fis.close();
  }
}