added feature to change an article image

prototype/src/main/java/org/hso/ecommerce/controller/intern/InternArticleController.java

@@ -3,10 +3,16 @@ package org.hso.ecommerce.controller.intern;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
-
 import javax.imageio.ImageIO;
 
 import org.hso.ecommerce.entities.shop.Article;
@@ -19,9 +25,12 @@ import org.hso.ecommerce.repos.shop.ImageRepository;
 import org.hso.ecommerce.repos.shop.OffersRepository;
 import org.hso.ecommerce.repos.warehouse.WarehouseBookingPositionSlotEntryRepository;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.crypto.bcrypt.BCrypt;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.util.DigestUtils;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.servlet.view.RedirectView;
 
 @Controller
@@ -80,12 +89,11 @@ public class InternArticleController {
 			@RequestParam(value = "price_netto", required = true) String pricenetto,
 			@RequestParam(value = "reorderMaxPrice", required = true) String reorderMaxPrice,
 			@RequestParam(value = "autobuy", required = true) Boolean shouldReorder,
-			@RequestParam(value = "categories", required = true) String categories) {
+			@RequestParam(value = "categories", required = true) String categories,
+			@RequestParam(value = "img", required = true) MultipartFile imgFile) {
 
 		Article tmpArticle = articleRepository.findArticleById(id); // get the old article
 
-		// TODO img
-
 		String[] separatedCategories = categories.split("\n");
 
 		tmpArticle.categories.clear();
@@ -102,6 +110,7 @@ public class InternArticleController {
 		tmpArticle.shopPricePerUnitNetCent = (int) (Float.parseFloat(pricenetto) * 100);
 		tmpArticle.warehouseUnitsPerSlot = Integer.parseInt(warehouseUnitsPerSlot);
 		tmpArticle.title = title;
+		updateImage(tmpArticle, imgFile);
 		tmpArticle.description = description;
 
 		articleRepository.save(tmpArticle); // save updated article
@@ -133,30 +142,56 @@ public class InternArticleController {
 		return new RedirectView("../" + articleRepository.findArticleIDByRelatedID(offeredArticleID).get());
 	}
 
-	private void setDefaultImage(Article tmpArticle) {
+	private void setDefaultImage(Article article) {
 		String defaultImagePath = "./data/img/no_product_img.jpg"; // path + name of default img
-		Optional<Integer> imageID = imageRepository.findImageByPath(defaultImagePath); // get default img
+		Optional<Integer> imageID = imageRepository.findImageIDByPath(defaultImagePath); // get default img
 
 		if (imageID.isPresent()) {
 			// default img is in DB
-			tmpArticle.image = imageRepository.findImageById(imageID.get()); // set default img to new article
+			article.image = imageRepository.findImageById(imageID.get()); // set default img to new article
 		} else {
-			//default img is not in DB
+			// default img is not in DB
 			File tmpFile = new File(defaultImagePath);
-			//test if default img file exits
+			// test if default img file exits
 			if (!tmpFile.exists()) {
-				//fallback if the file not exists
+				// fallback if the file not exists 
-				BufferedImage bufferedImage = new BufferedImage(422, 428, BufferedImage.TYPE_INT_RGB); //create new file
+				// create new file
+				BufferedImage bufferedImage = new BufferedImage(422, 428, BufferedImage.TYPE_INT_RGB); 
 				try {
-					ImageIO.write(bufferedImage, "jpg", new File(defaultImagePath)); //save new file on disk
+					ImageIO.write(bufferedImage, "jpg", new File(defaultImagePath)); // save new file on disk
 				} catch (IOException e) {
 					e.printStackTrace();
 				}
 			}
-			Image defaultImage = new Image(); 
+			Image defaultImage = new Image();
-			defaultImage.path = defaultImagePath; //set new file to default img
+			defaultImage.path = defaultImagePath; // set new file to default img
-			imageRepository.save(defaultImage); //save default img
+			imageRepository.save(defaultImage); // save default img
-			tmpArticle.image = defaultImage; //set default img to new article
+			article.image = defaultImage; // set default img to new article
+		}
+	}
+
+	private void updateImage(Article article, MultipartFile imgFile) {
+		// check if a file is present
+		if (imgFile.getSize() > 0) {
+			try {
+				// get file name based on MD5 hash
+				String fileName = DigestUtils.md5DigestAsHex(imgFile.getBytes()) + ".jpg";
+				// check if img is already in system
+				Optional<Integer> imageID = imageRepository.findImageIDByPath("./data/img/" + fileName);
+				if (imageID.isPresent()) {
+					article.image = imageRepository.findImageById(imageID.get()); // add existing img to article
+				} else {
+					// write new img file to disk
+					Files.newOutputStream(Paths.get("./data/img/", fileName)).write(imgFile.getBytes());
+					// create new img
+					Image newImage = new Image();
+					newImage.path = "./data/img/" + fileName; // set new file to new img
+					imageRepository.save(newImage); // save new img
+					article.image = newImage; // set new img to article
+				}
+			} catch (Exception e) {
+				setDefaultImage(article); // if upload failed, reset to default img
+			}
 		}
 	}
 

prototype/src/main/java/org/hso/ecommerce/repos/shop/ImageRepository.java

@@ -12,7 +12,7 @@ import java.util.Optional;
 public interface ImageRepository extends JpaRepository<Image, Long> {
 
 	@Query("SELECT i.id FROM Image i WHERE i.path = :path")
-	Optional<Integer> findImageByPath(@Param("path") String path);
+	Optional<Integer> findImageIDByPath(@Param("path") String path);
 
 	@Query("SELECT i FROM Image i WHERE i.id = :imageId")
 	Image findImageById(@Param("imageId") long imageId);

prototype/src/main/resources/application.properties

@@ -16,6 +16,8 @@ spring.jpa.show-sql=true
 #server.servlet.session.persistent=true
 # ----------------------------------------
 # WEB PROPERTIES
+spring.servlet.multipart.max-file-size=10MB
+spring.servlet.multipart.max-request-size=10MB
 # ----------------------------------------
 # EMBEDDED SERVER CONFIGURATION (ServerProperties)
 server.address=::1

prototype/src/main/resources/static/css/ecom.css

@@ -278,7 +278,7 @@ img.s {
 }
 
 img.m {
-   width: var(--u8);
+   width: 20rem;
 }
 
 /*

prototype/src/main/resources/templates/intern/listedArticles/id.html

@@ -24,7 +24,7 @@
             <form class="detailgrid" action="#" th:action="@{/intern/articles/{id}/saveChanges(id = ${ArticleID.id})}" th:object="${ArticleID}" method="POST" enctype="multipart/form-data">
                <p class="m">
                   <label for="title">Titel</label>
-                  <input class=" full-width" type="text" id="title" name="title" th:value="${ArticleID.title}"/>
+                  <input class=" full-width" type="text" id="title" name="title" required="required" pattern="[A-Za-z0-9]{1,20}" th:value="${ArticleID.title}"/>
                </p>
                <p class="s">
                   <label for="ref-article">Refernzierter Artikel</label>

prototype/src/main/resources/templates/intern/listedArticles/index.html

@@ -53,7 +53,7 @@
                      <td><span th:text="${article.price_netto}"></span> €</td>
                      <td><span th:text="${article.categorie}"></span></td>
                      <td><span th:text="${article.stock}"></span></td>
-                     <td><a th:href="${'/intern/supplierOffers/#q=' + {article.id}}" th:text="${article.offer_id}"></a></td>
+                     <td><a th:href="${'/intern/supplierOffers/#q=' + {article.title}}" th:text="${article.offer_id}"></a></td>
                      <td><a th:href="@{/intern/articles/{id}(id = ${article.id})}" th:text="${article.id}"></a></td>
                      <td>
                         <form th:action="@{/intern/articles/{id}(id = ${article.id})}"><input type="submit" value="Bearbeiten" /></form>