/**

  * copy-image-resizer

  * Copyright © 2014 František Kučera (frantovo.cz)

  *

  * This program 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.

  *

  * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.

  */

 package cz.frantovo.copyImageResizer;

 import cz.frantovo.copyImageResizer.SingleImageResizer.ImageFormat;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  *

  * @author Ing. František Kučera (frantovo.cz)

  */

 public class RecursiveImageResizer {

 	private static final Logger log = Logger.getLogger(RecursiveImageResizer.class.getName());

 	private final SingleImageResizer resizer = new SingleImageResizer();

 	public void resize(RecursiveOptions options) throws RecursiveException, ResizeException {

 		resizeDirectory(options.getInput(), options);

 	}

 	private void resizeFile(File file, RecursiveOptions options) throws ResizeException {

 		log.log(Level.FINE, "Resizing file: {0}", relativize(options.getInput(), file));

 		ImageFormat format = ImageFormat.getMatching(file.getName());

 		if (format == null) {

 			log.log(Level.FINE, "Skipping file: {0} (no image format matched this extension)", relativize(options.getInput(), file));

 		} else {

 			try {

 				FileInputStream input = new FileInputStream(file);

 				File relative = relativize(options.getInput(), file);

 				File outputFile = new File(options.getOutput(), relative.getPath());

 				FileOutputStream output = new FileOutputStream(outputFile);

 				resizer.resize(input, output, format);

 			} catch (FileNotFoundException e) {

 				throw new ResizeException("Error while opening stream", e);

 			}

 		}

 	}

 	private void resizeDirectory(File directory, RecursiveOptions options) throws ResizeException {

 		log.log(Level.FINE, "Resizing directory: {0}", directory);

 		File relative = relativize(options.getInput(), directory);

 		File output = new File(options.getOutput(), relative.getPath());

 		output.mkdirs();

 		for (File entry : directory.listFiles()) {

 			if (entry.isDirectory()) {

 				resizeDirectory(entry, options);

 			} else {

 				resizeFile(entry, options);

 			}

 		}

 	}

 	private static File relativize(File root, File child) {

 		return root.toPath().relativize(child.toPath()).toFile();

 	}

 }