US10: Make it possible for horse information to be displayed on the view page, add a get image method to the API

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/endpoint/HorseEndpoint.java

@@ -11,6 +11,7 @@ import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.DataAccessException;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.server.ResponseStatusException;
@@ -146,4 +147,24 @@ public class HorseEndpoint {
                 "Something went wrong while uploading the file");
         }
     }
+
+    @RequestMapping(value = "/image/{path}", produces = {MediaType.IMAGE_JPEG_VALUE,MediaType.IMAGE_PNG_VALUE}, method=RequestMethod.GET)
+    @ResponseStatus(HttpStatus.OK)
+    public @ResponseBody byte[] getImage(@PathVariable("path") String path) {
+        // Get the image as byte array and return it with a media type assigned
+        // https://www.baeldung.com/spring-controller-return-image-file
+        // https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/http/MediaType.html
+        LOGGER.info("GET " + BASE_URL + "/image/{}", path);
+        try {
+            return horseService.getImage(path);
+        } catch(ValidationException e) {
+            LOGGER.error(e.getMessage());
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST,
+                "Unsupported file type provided. Supported file types are jpg and png.");
+        } catch (IOException e) {
+            LOGGER.error(e.getMessage());
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND,
+                "Something went wrong while reading the file");
+        }
+    }
 }

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/persistence/FileDao.java

@@ -18,4 +18,12 @@ public interface FileDao {
      * @throws IOException if something goes wrong with deleting the file
      */
     void delete(String fileName) throws IOException;
+
+    /**
+     * Used fot getting a file from the local filesystem
+     * @param fileName of the file to open
+     * @return the file as bytes
+     * @throws IOException if something goes wrong during file access
+     */
+    byte[] get(String fileName) throws IOException;
 }

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/persistence/impl/HorseFileDao.java

@@ -63,4 +63,21 @@ public class HorseFileDao implements FileDao {
             throw new IOException("Deleting the file specified failed");
         }
     }
+
+    @Override
+    public byte[] get(String fileName) throws IOException {
+        if(fileName == null || fileName.equals(""))
+            throw new IOException("Cannot open an unexisting file");
+
+        LOGGER.trace("Getting file from " + FILE_BASE_PATH + fileName);
+        try {
+            // Read the file and return a byte array
+            // https://stackoverflow.com/a/5083666
+            File imageFile = new File(FILE_BASE_PATH + fileName);
+            return Files.readAllBytes(imageFile.toPath());
+        } catch(Exception e) {
+            LOGGER.error(e.getMessage());
+            throw new IOException("Opening the file specified failed");
+        }
+    }
 }

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/service/HorseService.java

@@ -64,4 +64,12 @@ public interface HorseService {
      * @throws ValidationException will be thrown if the file is in the incorrect format
      */
     void saveImage(MultipartFile img) throws IOException, ValidationException;
+
+    /**
+     * @param path of the image to get
+     * @return the image
+     * @throws IOException         will be thrown if the file could not be accessed
+     * @throws ValidationException will be thrown if the path does not end with .jpg, .jpeg or .png
+     */
+    byte[] getImage(String path) throws IOException, ValidationException;
 }

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/service/impl/SimpleHorseService.java

@@ -78,4 +78,11 @@ public class SimpleHorseService implements HorseService {
         LOGGER.trace("saveImage({})", img.getName());
         horseFileDao.save(img);
     }
+
+    @Override
+    public byte[] getImage(String path) throws IOException, ValidationException {
+        this.validator.validateImageRequest(path);
+        LOGGER.trace("getImage({})", path);
+        return horseFileDao.get(path);
+    }
 }

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/util/Validator.java

@@ -68,6 +68,15 @@ public class Validator {
         }
     }
 
+    public void validateImageRequest(String path) throws ValidationException {
+        if(path == null || path.isEmpty()) {
+            throw new ValidationException("No image path supplied");
+        }
+        if(!path.endsWith(".png") && !path.endsWith(".jpg") && !path.endsWith(".jpeg")) {
+            throw new ValidationException("Unsupported file extension supplied.");
+        }
+    }
+
     public void validateHorseFilter(Map<String, String> filters) throws ValidationException {
         if(filters.get("score") != null) {
             try {

frontend/wendys-friends/src/app/component/horse/horse.component.html

@@ -6,12 +6,40 @@
 </div>
 
 <div class="container mt-3" *ngIf="horse">
-  <div class="alert alert-success" role="alert">
-    <h4 class="alert-heading">Well done!</h4>
-    <p>Your application is up and running</p>
+  <h1>Horse Info for {{ horse.name }}</h1>
   <hr>
-    <p>This is the name of the horse with id 1 from your backend system:
-      <span class="font-weight-bold">{{horse.name}}</span>
-    </p>
+  <div class="row">
+    <img class="img-thumbnail float-left col-md-6" src="http://localhost:8080/horses/image/{{ horse.imagePath }}" *ngIf="horse.imagePath">
+    <table class="table table-striped float-right col-md-6">
+      <tbody>
+        <tr>
+          <th scope="row">Name</th>
+          <td>{{ horse.name }}</td>
+        </tr>
+        <tr>
+          <th scope="row">Owner</th>
+          <td>
+            <a href="owner/{{ horse.owner }}" *ngIf="horse.owner; else noOwner">{{ ownerName }}</a>
+            <ng-template #noOwner> {{ ownerName }} </ng-template>
+          </td>
+        </tr>
+        <tr>
+          <th scope="row">Birthday</th>
+          <td>{{ horse.birthday }}</td>
+        </tr>
+        <tr>
+          <th scope="row">Race</th>
+          <td>{{ horse.race }}</td>
+        </tr>
+        <tr>
+          <th scope="row">Score</th>
+          <td>{{ horse.score }}</td>
+        </tr>
+        <tr>
+          <th scope="row">Description</th>
+          <td>{{ horse.description }}</td>
+        </tr>
+      </tbody>
+    </table>
   </div>
 </div>

frontend/wendys-friends/src/app/component/horse/horse.component.ts

@@ -2,6 +2,8 @@ import { Component, OnInit } from '@angular/core';
 import { HorseService } from '../../service/horse.service';
 import { Horse } from '../../dto/horse';
 import { ActivatedRoute } from '@angular/router';
+import { OwnerService } from 'src/app/service/owner.service';
+import { Owner } from 'src/app/dto/owner';
 
 @Component({
   selector: 'app-horse',
@@ -13,8 +15,9 @@ export class HorseComponent implements OnInit {
   error = false;
   errorMessage = '';
   horse: Horse;
+  ownerName: string;
 
-  constructor(private horseService: HorseService, private route: ActivatedRoute) { }
+  constructor(private horseService: HorseService, private route: ActivatedRoute, private ownerService: OwnerService) { }
 
   ngOnInit(): void {
     // Extract id from url
@@ -37,6 +40,7 @@ export class HorseComponent implements OnInit {
     this.horseService.getHorseById(id).subscribe(
       (horse: Horse) => {
         this.horse = horse;
+        this.loadOwnerNameForHorse(horse.owner);
       },
       error => {
         this.defaultServiceErrorHandling(error);
@@ -44,6 +48,23 @@ export class HorseComponent implements OnInit {
     );
   }
 
+  /**
+   * Loads the name of the owner of a horse
+   * @param id of the owner to get
+   */
+  private loadOwnerNameForHorse(id: number) {
+    this.ownerService.getOwnerById(id).subscribe(
+      (owner: Owner) => {
+        console.log(owner.name)
+        this.ownerName = owner.name;
+        console.log(this.ownerName);
+      },
+      error => {
+        this.ownerName = "N/A";
+      }
+    )
+  }
+
   private defaultServiceErrorHandling(error: any) {
     console.log(error);
     this.error = true;