S3ImageServiceTests all passing.

src/integrationTest/java/app/mealsmadeeasy/api/image/S3ImageServiceTests.java

@@ -22,13 +22,14 @@ import java.util.List;
 import java.util.Set;
 
 import static app.mealsmadeeasy.api.image.ContainsImagesMatcher.containsImages;
+import static app.mealsmadeeasy.api.user.ContainsUsersMatcher.containsUsers;
 import static app.mealsmadeeasy.api.user.IsUserMatcher.isUser;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.nullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.notNullValue;
-import static org.junit.jupiter.api.Assertions.fail;
+import static org.junit.Assert.assertThrows;
 
 @Testcontainers
 @SpringBootTest
@@ -165,43 +166,89 @@ public class S3ImageServiceTests {
     @Test
     @DirtiesContext
     public void updateAlt() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        Image image = this.createHal9000(owner);
+        final ImageUpdateInfoSpec spec = new ImageUpdateInfoSpec();
+        spec.setAlt("HAL 9000");
+        image = this.imageService.update(image, owner, spec);
+        assertThat(image.getAlt(), is("HAL 9000"));
     }
 
     @Test
     @DirtiesContext
     public void updateCaption() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        Image image = this.createHal9000(owner);
+        final ImageUpdateInfoSpec spec = new ImageUpdateInfoSpec();
+        spec.setCaption("HAL 9000 from 2001: A Space Odyssey");
+        image = this.imageService.update(image, owner, spec);
+        assertThat(image.getCaption(), is("HAL 9000 from 2001: A Space Odyssey"));
     }
 
     @Test
     @DirtiesContext
     public void updateIsPublic() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        Image image = this.createHal9000(owner);
+        final ImageUpdateInfoSpec spec = new ImageUpdateInfoSpec();
+        spec.setPublic(true);
+        image = this.imageService.update(image, owner, spec);
+        assertThat(image.isPublic(), is(true));
+    }
+
+    private Image addViewer(Image image, User owner, User viewer) {
+        final ImageUpdateInfoSpec spec0 = new ImageUpdateInfoSpec();
+        spec0.setViewersToAdd(Set.of(viewer));
+        return this.imageService.update(image, owner, spec0);
     }
 
     @Test
     @DirtiesContext
     public void addViewers() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        final User viewer = this.createTestUser("imageViewer");
+        Image image = this.createHal9000(owner);
+        image = this.addViewer(image, owner, viewer);
+        assertThat(image.getViewers(), containsUsers(viewer));
     }
 
     @Test
     @DirtiesContext
     public void removeViewers() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        final User viewer = this.createTestUser("imageViewer");
+        Image image = this.createHal9000(owner);
+        image = this.addViewer(image, owner, viewer);
+        assertThat(image.getViewers(), containsUsers(viewer));
+
+        final ImageUpdateInfoSpec spec1 = new ImageUpdateInfoSpec();
+        spec1.setViewersToRemove(Set.of(viewer));
+        image = this.imageService.update(image, owner, spec1);
+        assertThat(image.getViewers(), empty());
     }
 
     @Test
     @DirtiesContext
     public void clearAllViewers() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        final User viewer = this.createTestUser("imageViewer");
+        Image image = this.createHal9000(owner);
+        image = this.addViewer(image, owner, viewer);
+        assertThat(image.getViewers(), containsUsers(viewer));
+
+        final ImageUpdateInfoSpec spec1 = new ImageUpdateInfoSpec();
+        spec1.setClearAllViewers(true);
+        image = this.imageService.update(image, owner, spec1);
+        assertThat(image.getViewers(), empty());
     }
 
     @Test
     @DirtiesContext
     public void deleteImage() throws Exception {
-        fail("TODO");
+        final User owner = this.createTestUser("imageOwner");
+        final Image image = this.createHal9000(owner);
+        this.imageService.deleteImage(image, owner);
+        assertThrows(ImageException.class, () -> this.imageService.getById(image.getId(), owner));
     }
 
 }

src/main/java/app/mealsmadeeasy/api/image/Image.java

@@ -1,7 +1,6 @@
 package app.mealsmadeeasy.api.image;
 
 import app.mealsmadeeasy.api.user.User;
-import app.mealsmadeeasy.api.user.UserEntity;
 import org.jetbrains.annotations.Nullable;
 
 import java.time.LocalDateTime;
@@ -17,5 +16,5 @@ public interface Image {
     @Nullable String getCaption();
     User getOwner();
     boolean isPublic();
-    Set<UserEntity> getViewers();
+    Set<User> getViewers();
 }

src/main/java/app/mealsmadeeasy/api/image/ImageService.java

@@ -14,7 +14,9 @@ public interface ImageService {
     Image create(User owner, String userFilename, InputStream inputStream, long objectSize, ImageCreateInfoSpec infoSpec)
             throws IOException, ImageException;
 
+    Image getById(long id, @Nullable User viewer) throws ImageException;
     Image getByOwnerAndFilename(User owner, String filename, User viewer) throws ImageException;
+
     InputStream getImageContent(Image image, @Nullable User viewer) throws IOException;
     List<Image> getImagesOwnedBy(User user);
 

src/main/java/app/mealsmadeeasy/api/image/S3ImageEntity.java

@@ -135,7 +135,11 @@ public class S3ImageEntity implements Image {
     }
 
     @Override
-    public Set<UserEntity> getViewers() {
+    public Set<User> getViewers() {
+        return Set.copyOf(this.viewers);
+    }
+
+    public Set<UserEntity> getViewerEntities() {
         return this.viewers;
     }
 

src/main/java/app/mealsmadeeasy/api/image/S3ImageService.java

@@ -5,6 +5,7 @@ import app.mealsmadeeasy.api.image.spec.ImageUpdateInfoSpec;
 import app.mealsmadeeasy.api.s3.S3Manager;
 import app.mealsmadeeasy.api.user.User;
 import app.mealsmadeeasy.api.user.UserEntity;
+import org.jetbrains.annotations.Nullable;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.access.prepost.PostAuthorize;
 import org.springframework.security.access.prepost.PreAuthorize;
@@ -12,9 +13,7 @@ import org.springframework.stereotype.Service;
 
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.ArrayList;
+import java.util.*;
-import java.util.List;
-import java.util.UUID;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -75,9 +74,11 @@ public class S3ImageService implements ImageService {
         if (spec.getPublic() != null) {
             entity.setPublic(spec.getPublic());
         }
+        final Set<UserEntity> viewers = new HashSet<>(entity.getViewerEntities());
         for (final User viewerToAdd : spec.getViewersToAdd()) {
-            entity.getViewers().add((UserEntity) viewerToAdd);
+            viewers.add((UserEntity) viewerToAdd);
         }
+        entity.setViewers(viewers);
     }
 
     @Override
@@ -105,6 +106,14 @@ public class S3ImageService implements ImageService {
         return this.imageRepository.save(draft);
     }
 
+    @Override
+    @PostAuthorize("@imageSecurity.isViewableBy(returnObject, #viewer)")
+    public Image getById(long id, @Nullable User viewer) throws ImageException {
+        return this.imageRepository.findById(id).orElseThrow(() -> new ImageException(
+                ImageException.Type.INVALID_ID, "No Image with id: " + id
+        ));
+    }
+
     @Override
     @PostAuthorize("@imageSecurity.isViewableBy(returnObject, #viewer)")
     public Image getByOwnerAndFilename(User owner, String filename, User viewer) throws ImageException {
@@ -131,11 +140,15 @@ public class S3ImageService implements ImageService {
     public Image update(final Image image, User modifier, ImageUpdateInfoSpec updateSpec) {
         S3ImageEntity entity = (S3ImageEntity) image;
         this.transferFromSpec(entity, updateSpec);
+        final @Nullable Boolean clearAllViewers = updateSpec.getClearAllViewers();
+        if (clearAllViewers != null && clearAllViewers) {
+            entity.setViewers(Set.of());
+        } else {
+            final Set<UserEntity> viewers = new HashSet<>(entity.getViewerEntities());
             for (final User toRemove : updateSpec.getViewersToRemove()) {
-            entity.getViewers().remove((UserEntity) toRemove);
+                viewers.remove((UserEntity) toRemove);
             }
-        if (updateSpec.getClearAllViewers() != null) {
+            entity.setViewers(viewers);
-            entity.getViewers().clear();
         }
         return this.imageRepository.save(entity);
     }

src/testFixtures/java/app/mealsmadeeasy/api/user/ContainsUsersMatcher.java

@@ -0,0 +1,17 @@
+package app.mealsmadeeasy.api.user;
+
+import app.mealsmadeeasy.api.matchers.ContainsItemsMatcher;
+
+import java.util.List;
+
+public class ContainsUsersMatcher extends ContainsItemsMatcher<User, Long> {
+
+    public static ContainsUsersMatcher containsUsers(User... allExpected) {
+        return new ContainsUsersMatcher(allExpected);
+    }
+
+    private ContainsUsersMatcher(User... allExpected) {
+        super(List.of(allExpected), o -> o instanceof User, User::getId);
+    }
+
+}