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package com.juick.server.util;
import org.apache.commons.io.FilenameUtils;
import org.imgscalr.Scalr;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
public class ImageUtils {
/**
* Move attached image from temp folder to image folder.
* Create preview images in corresponding folders.
*
* @param tempFilename Name of the image file in temp folder.
* @param outputFilename Name that will be used in in image folder.
* @param tmpDir Path string for the temp folder.
* @param imgDir Path string for the image folder.
*/
public static void saveImageWithPreviews(String tempFilename, String outputFilename, String tmpDir, String imgDir)
throws IOException {
String ext = FilenameUtils.getExtension(outputFilename);
Path outputImagePath = Paths.get(imgDir, "p", outputFilename);
Files.move(Paths.get(tmpDir, tempFilename), outputImagePath);
BufferedImage originalImage = ImageIO.read(outputImagePath.toFile());
int width = originalImage.getWidth();
int height = originalImage.getHeight();
int maxDimension = (width > height) ? width : height;
BufferedImage image1024 = (maxDimension > 1024) ? Scalr.resize(originalImage, 1024) : originalImage;
BufferedImage image0512 = (maxDimension > 512) ? Scalr.resize(originalImage, 512) : originalImage;
BufferedImage image0160 = (maxDimension > 160) ? Scalr.resize(originalImage, 160) : originalImage;
ImageIO.write(image1024, ext, Paths.get(imgDir, "photos-1024", outputFilename).toFile());
ImageIO.write(image0512, ext, Paths.get(imgDir, "photos-512", outputFilename).toFile());
ImageIO.write(image0160, ext, Paths.get(imgDir, "ps", outputFilename).toFile());
}
/**
* Save new avatar in all required sizes.
*
* @param tempFilename Name of the image file in temp folder.
* @param uid User id that is used to build image file names.
* @param tmpDir Path string for the temp folder.
* @param imgDir Path string for the image folder.
*/
public static void saveAvatar(String tempFilename, int uid, String tmpDir, String imgDir)
throws IOException {
String ext = FilenameUtils.getExtension(tempFilename);
String originalName = String.format("%s.%s", uid, ext);
Path originalPath = Paths.get(imgDir, "ao", originalName);
Files.move(Paths.get(tmpDir, tempFilename), originalPath, StandardCopyOption.REPLACE_EXISTING);
BufferedImage originalImage = ImageIO.read(originalPath.toFile());
String targetExt = "png";
String targetName = String.format("%s.%s", uid, targetExt);
ImageIO.write(Scalr.resize(originalImage, 96), targetExt, Paths.get(imgDir, "a", targetName).toFile());
ImageIO.write(Scalr.resize(originalImage, 32), targetExt, Paths.get(imgDir, "as", targetName).toFile());
}
}
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