Update articles endpoint to allow updates only when the url is not ye…

…t used and delete for the AWS support

src/main/java/dj/personal/website/article/ArticleController.java

@@ -27,6 +27,12 @@ public Collection<Article> findAll() {
 	@PutMapping
 	@RolesAllowed(Role.ADMIN)
 	public Article save(@RequestBody Article article) {
-		return articleService.save(article);
+		return articleService.saveIfNotExists(article);
+	}
+
+	@DeleteMapping(path = "/{id}")
+	@RolesAllowed(Role.ADMIN)
+	public void delete(@PathVariable Long id){
+		articleService.deleteById(id);
 	}
 }

src/main/java/dj/personal/website/article/ArticleRepository.java

@@ -2,5 +2,8 @@
 
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.Optional;
+
 public interface ArticleRepository extends JpaRepository<Article, Long> {
+    Optional<Article> findByUrl(String url);
 }

src/main/java/dj/personal/website/article/ArticleService.java

@@ -5,6 +5,7 @@
 
 import java.util.Collection;
 import java.util.Comparator;
+import java.util.Optional;
 
 import static java.util.stream.Collectors.toList;
 
@@ -24,7 +25,12 @@ public Collection<Article> findAll() {
                 .collect(toList());
     }
 
-    public Article save(Article article) {
-        return articleRepository.save(article);
+    public Article saveIfNotExists(Article article) {
+        return articleRepository.findByUrl(article.getUrl())
+                .orElseGet(() -> articleRepository.save(article));
+    }
+
+    public void deleteById(Long id) {
+        articleRepository.deleteById(id);
     }
 }