feat: add resize

backend/src/main/java/ch/xxx/aidoclibchat/adapter/controller/ImageController.java

@@ -12,26 +12,32 @@
  */
 package ch.xxx.aidoclibchat.adapter.controller;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;
 
 import ch.xxx.aidoclibchat.usecase.mapping.ImageMapper;
+import ch.xxx.aidoclibchat.usecase.service.ImageService;
 
 @RestController
 @RequestMapping("rest/image")
 public class ImageController {
+	private static final Logger LOG = LoggerFactory.getLogger(ImageController.class);
 	private final ImageMapper imageMapper;
+	private final ImageService imageService;		
 
-	public ImageController(ImageMapper imageMapper) {
+	public ImageController(ImageMapper imageMapper, ImageService imageService) {
 		this.imageMapper = imageMapper;
+		this.imageService = imageService;
 	}
 
 	@PostMapping("/query")
-	public String postImageQuery(@RequestParam(required = true) String query, @RequestParam("file") MultipartFile imageQuery) {
-		var imageDto = this.imageMapper.map(imageQuery, query);
-		return "";
+	public String postImageQuery(@RequestParam(required = true) String query, @RequestParam("file") MultipartFile imageQuery) {		
+		var result = this.imageService.queryImage(this.imageMapper.map(imageQuery, query));		
+		return result;
 	}
 }

backend/src/main/java/ch/xxx/aidoclibchat/domain/common/MetaData.java

@@ -22,7 +22,18 @@ public enum DocumentType {
 	};
 
 	public enum ImageType {
-		JPEG, PNG, SVG, UNKNOWN
+		JPEG("jpg"), PNG("png"), SVG("svg"), UNKNOWN("unknown");
+
+		private String type;
+
+		private ImageType(String type) {
+			this.type = type;
+		}
+
+		@Override
+		public String toString() {
+			return this.type;
+		}
 	}
 
 	public static final String ID = "id";

backend/src/main/java/ch/xxx/aidoclibchat/usecase/service/ImageService.java

@@ -0,0 +1,63 @@
+/**
+ *    Copyright 2023 Sven Loesekann
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+       http://www.apache.org/licenses/LICENSE-2.0
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
+package ch.xxx.aidoclibchat.usecase.service;
+
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+
+import ch.xxx.aidoclibchat.domain.model.dto.ImageDto;
+
+@Service
+public class ImageService {
+	private static final Logger LOG = LoggerFactory.getLogger(ImageService.class);
+
+	public String queryImage(ImageDto imageDto) {
+		imageDto = resizeImage(imageDto);
+		return "";
+	}
+
+	private ImageDto resizeImage(ImageDto imageDto) {
+		try {
+			BufferedImage image = ImageIO.read(new ByteArrayInputStream(imageDto.getImageContent()));
+			int targetHeight = image.getHeight();
+			int targetWidth = image.getWidth();
+			if(image.getHeight() > 672 && image.getWidth() > 672) {
+				if(image.getHeight() > image.getWidth()) {
+					targetHeight = image.getHeight() / (image.getHeight() / 672);
+					targetWidth = image.getWidth() / (image.getHeight() / 672);
+				} else {
+					targetHeight = image.getHeight() / (image.getWidth() / 672);
+					targetWidth = image.getWidth() / (image.getWidth() / 672);
+				}
+			}
+			var outputImage = new BufferedImage(targetWidth, targetHeight, BufferedImage.TYPE_INT_RGB);
+			outputImage.getGraphics().drawImage(image.getScaledInstance(targetWidth, targetHeight, Image.SCALE_SMOOTH), 0,0, null);
+			var ios = new ByteArrayOutputStream();
+			ImageIO.write(outputImage, imageDto.getImageType().toString(), ios);			
+			imageDto.setImageContent(ios.toByteArray());
+			imageDto.setContentSize(ios.toByteArray().length);
+		} catch (IOException e) {
+			LOG.info("Image resize failed.",e);
+		}
+		return imageDto;
+	}
+}