franta-hg@5: /**
franta-hg@5:  * copy-image-resizer
franta-hg@5:  * Copyright © 2014 František Kučera (frantovo.cz)
franta-hg@5:  *
franta-hg@5:  * This program is free software: you can redistribute it and/or modify
franta-hg@5:  * it under the terms of the GNU General Public License as published by
franta-hg@5:  * the Free Software Foundation, either version 3 of the License, or
franta-hg@5:  * (at your option) any later version.
franta-hg@5:  *
franta-hg@5:  * This program is distributed in the hope that it will be useful,
franta-hg@5:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@5:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@5:  * GNU General Public License for more details.
franta-hg@5:  *
franta-hg@5:  * You should have received a copy of the GNU General Public License
franta-hg@5:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@5:  */
franta-hg@5: package cz.frantovo.copyImageResizer;
franta-hg@5: 
franta-hg@17: import cz.frantovo.copyImageResizer.JavaSingleImageResizer.ImageFormat;
franta-hg@6: import java.io.File;
franta-hg@6: import java.io.FileInputStream;
franta-hg@6: import java.io.FileNotFoundException;
franta-hg@6: import java.io.FileOutputStream;
franta-hg@7: import java.io.IOException;
franta-hg@7: import java.nio.channels.FileChannel;
franta-hg@6: import java.util.logging.Level;
franta-hg@14: import java.util.logging.LogRecord;
franta-hg@6: import java.util.logging.Logger;
franta-hg@6: 
franta-hg@5: /**
franta-hg@5:  *
franta-hg@5:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@5:  */
franta-hg@5: public class RecursiveImageResizer {
franta-hg@5: 
franta-hg@6: 	private static final Logger log = Logger.getLogger(RecursiveImageResizer.class.getName());
franta-hg@13: 
franta-hg@12: 	private final Counters counters = new Counters();
franta-hg@6: 
franta-hg@17: 	/**
franta-hg@17: 	 * TODO: support plugins – several implementations of SingleImageResizer
franta-hg@17: 	 */
franta-hg@17: 	private final SingleImageResizer resizer = new JavaSingleImageResizer();
franta-hg@6: 
franta-hg@11: 	private final RecursiveOptions options;
franta-hg@11: 
franta-hg@11: 	public RecursiveImageResizer(RecursiveOptions options) {
franta-hg@11: 		this.options = options;
franta-hg@6: 	}
franta-hg@6: 
franta-hg@12: 	public Counters resize() throws RecursiveException, ResizeException {
franta-hg@11: 		resizeDirectory(options.getInput());
franta-hg@12: 		return counters;
franta-hg@11: 	}
franta-hg@11: 
franta-hg@11: 	private void resizeFile(File inputFile) throws ResizeException {
franta-hg@7: 		File inputFileRelative = relativize(options.getInput(), inputFile);
franta-hg@10: 		log.log(Level.FINER, "Resizing file: {0}", inputFileRelative);
franta-hg@13: 		counters.increment(Counters.COUNTER_TYPE.FILES);
franta-hg@6: 
franta-hg@7: 		ImageFormat format = ImageFormat.getMatching(inputFile.getName());
franta-hg@6: 
franta-hg@6: 		if (format == null) {
franta-hg@10: 			log.log(Level.FINER, "Skipping file: {0} (no image format matched this extension)", inputFileRelative);
franta-hg@13: 			counters.increment(Counters.COUNTER_TYPE.SKIPPED_UNKNOWN_EXTENSION);
franta-hg@6: 		} else {
franta-hg@6: 			try {
franta-hg@7: 				for (SizeSpecification size : options.getSizes()) {
franta-hg@7: 					File sizeRoot = new File(options.getOutput(), size.getDirectory());
franta-hg@7: 					File outputFile = new File(sizeRoot, inputFileRelative.getPath());
franta-hg@7: 					try (FileInputStream input = new FileInputStream(inputFile)) {
franta-hg@15: 
franta-hg@15: 						try (FileOutputStream output = new FileOutputStream(outputFile)) {
franta-hg@15: 							boolean wasResized = resizer.resize(input, output, size, format);
franta-hg@15: 							if (wasResized) {
franta-hg@13: 								counters.increment(Counters.COUNTER_TYPE.RESIZED);
franta-hg@15: 							} else {
franta-hg@15: 								log.log(Level.FINER, "File: {0} has already required (or smaller) size → just copy", inputFileRelative);
franta-hg@15: 								justCopy(inputFile, outputFile);
franta-hg@15: 								counters.increment(Counters.COUNTER_TYPE.JUST_COPIED);
franta-hg@7: 							}
franta-hg@7: 						}
franta-hg@7: 					}
franta-hg@7: 				}
franta-hg@6: 			} catch (FileNotFoundException e) {
franta-hg@6: 				throw new ResizeException("Error while opening stream", e);
franta-hg@7: 			} catch (IOException e) {
franta-hg@7: 				throw new ResizeException("Error while closing stream", e);
franta-hg@6: 			}
franta-hg@6: 		}
franta-hg@7: 	}
franta-hg@7: 
franta-hg@7: 	private static void justCopy(File inputFile, File outputFile) throws ResizeException {
franta-hg@7: 		try {
franta-hg@7: 
franta-hg@7: 			if (!outputFile.exists()) {
franta-hg@7: 				outputFile.createNewFile();
franta-hg@7: 			}
franta-hg@7: 
franta-hg@7: 			try (FileChannel input = new FileInputStream(inputFile).getChannel()) {
franta-hg@7: 				try (FileChannel output = new FileOutputStream(outputFile).getChannel()) {
franta-hg@7: 					output.transferFrom(input, 0, input.size());
franta-hg@7: 				}
franta-hg@7: 			}
franta-hg@7: 
franta-hg@7: 		} catch (IOException e) {
franta-hg@7: 			throw new ResizeException("Unable copy stream/channel", e);
franta-hg@7: 		}
franta-hg@6: 
franta-hg@6: 	}
franta-hg@6: 
franta-hg@11: 	private void resizeDirectory(File directory) throws ResizeException {
franta-hg@6: 
franta-hg@6: 		log.log(Level.FINE, "Resizing directory: {0}", directory);
franta-hg@13: 		counters.increment(Counters.COUNTER_TYPE.DIRECTORIES);
franta-hg@6: 
franta-hg@7: 		for (SizeSpecification size : options.getSizes()) {
franta-hg@7: 			File relative = relativize(options.getInput(), directory);
franta-hg@7: 			File sizeRoot = new File(options.getOutput(), size.getDirectory());
franta-hg@7: 			File dir = new File(sizeRoot, relative.getPath());
franta-hg@7: 			dir.mkdirs();
franta-hg@7: 		}
franta-hg@6: 
franta-hg@6: 		for (File entry : directory.listFiles()) {
franta-hg@6: 			if (entry.isDirectory()) {
franta-hg@11: 				resizeDirectory(entry);
franta-hg@6: 			} else {
franta-hg@14: 				if (options.isSkipErrors()) {
franta-hg@14: 					try {
franta-hg@14: 						resizeFile(entry);
franta-hg@14: 					} catch (Exception e) {
franta-hg@14: 						counters.increment(Counters.COUNTER_TYPE.SKIPPED_ERROR);
franta-hg@14: 						LogRecord record = new LogRecord(Level.WARNING, "Skipping error : {0}");
franta-hg@14: 						record.setParameters(new Object[]{entry});
franta-hg@14: 						record.setThrown(e);
franta-hg@14: 						log.log(record);
franta-hg@14: 					}
franta-hg@14: 				} else {
franta-hg@14: 					resizeFile(entry);
franta-hg@14: 				}
franta-hg@14: 
franta-hg@6: 			}
franta-hg@6: 		}
franta-hg@6: 
franta-hg@6: 	}
franta-hg@6: 
franta-hg@6: 	private static File relativize(File root, File child) {
franta-hg@6: 		return root.toPath().relativize(child.toPath()).toFile();
franta-hg@5: 	}
franta-hg@5: 
franta-hg@5: }