Find user by id

Author: mickablondo

src/main/java/dev/mikablondo/hibernate_reactive_test/controller/UserController.java

@@ -46,4 +46,17 @@ public Uni<ResponseEntity<Void>> deleteUser(@PathVariable String id) {
             return Uni.createFrom().item(ResponseEntity.status(HttpStatus.BAD_REQUEST).build());
         }
     }
+
+    @GetMapping("/{id}")
+    public Uni<ResponseEntity<User>> getUserById(@PathVariable String id) {
+        try {
+            UUID uuid = UUID.fromString(id);
+            return userService.getUserById(uuid)
+                    .map(user -> user != null
+                            ? ResponseEntity.ok(user)
+                            : ResponseEntity.status(HttpStatus.NOT_FOUND).build());
+        } catch (IllegalArgumentException e) {
+            return Uni.createFrom().item(ResponseEntity.status(HttpStatus.BAD_REQUEST).build());
+        }
+    }
 }

src/main/java/dev/mikablondo/hibernate_reactive_test/services/UserService.java

@@ -62,4 +62,27 @@ public Uni<Void> createUser(User user) {
     public Uni<Boolean> deleteUser(UUID id) {
         return userRepository.deleteUser(id);
     }
+
+    /**
+     * This method retrieves a user by its UUID from the database.
+     *
+     * @param uuid the UUID of the user to be retrieved
+     * @return a Uni<User> containing the user DTO if found, or null if not found
+     */
+    public Uni<User> getUserById(UUID uuid) {
+        return userRepository.findById(uuid)
+                .onItem().transform(userEntity -> {
+                    if (userEntity != null) {
+                        return User.builder()
+                                .id(userEntity.getId())
+                                .nom(userEntity.getNom())
+                                .prenom(userEntity.getPrenom())
+                                .age(userEntity.getAge())
+                                .metier(userEntity.getMetier())
+                                .build();
+                    } else {
+                        return null;
+                    }
+                });
+    }
 }