csns.util.ImageUtils.java Source code

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Here is the source code for csns.util.ImageUtils.java

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/*
 * This file is part of the CSNetwork Services (CSNS) project.
 * 
 * Copyright 2014, Chengyu Sun (csun@calstatela.edu).
 * 
 * CSNS is free software: you can redistribute it and/or modify it under the
 * terms of the 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.
 * 
 * CSNS 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 Affero General Public License for
 * more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with CSNS. If not, see http://www.gnu.org/licenses/agpl.html.
 */
package csns.util;

import java.awt.image.BufferedImage;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.imgscalr.Scalr;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import csns.model.core.File;
import csns.model.core.dao.FileDao;

@Component
public class ImageUtils {

    public static final int PROFILE_PICTURE_SIZE = 320;

    public static final int PROFILE_THUMBNAIL_SIZE = 24;

    @Autowired
    private FileDao fileDao;

    @Autowired
    private FileIO fileIO;

    private static final Logger logger = LoggerFactory.getLogger(ImageUtils.class);

    public File resizeToProfilePicture(File file) {
        return resize(file, PROFILE_PICTURE_SIZE, false);
    }

    public File resizeToProfileThumbnail(File file) {
        return resize(file, PROFILE_THUMBNAIL_SIZE, false);
    }

    public File resize(File file, int targetSize, boolean always) {
        File newFile = null;

        try {
            BufferedImage image = ImageIO.read(fileIO.getDiskFile(file));

            if (!always && image.getWidth() < targetSize && image.getHeight() < targetSize)
                return file;

            BufferedImage newImage = Scalr.resize(image, targetSize);
            java.io.File tempFile = java.io.File.createTempFile("temp", null);
            ImageIO.write(newImage, "jpg", tempFile);

            newFile = new File();
            newFile.setName(file.getName() + "_" + targetSize + ".jpg");
            newFile.setType("image/jpeg");
            newFile.setSize(tempFile.length());
            newFile.setOwner(file.getOwner());
            newFile.setParent(file.getParent());
            newFile.setPublic(file.isPublic());
            newFile = fileDao.saveFile(newFile);

            tempFile.renameTo(fileIO.getDiskFile(newFile, false));
        } catch (IOException e) {
            logger.error("Fail to resize image " + file.getName(), e);
        }

        return newFile;
    }

}