feat: implements completed MediaItemsController

Author: Meiko-S22

lesson_26/api/java/api_app/src/main/java/com/codedifferently/lesson26/web/MediaItemsController.java

@@ -1,10 +1,14 @@
 package com.codedifferently.lesson26.web;
 
+import com.codedifferently.lesson26.library.Librarian;
+import com.codedifferently.lesson26.library.Library;
+import com.codedifferently.lesson26.library.MediaItem;
+import com.codedifferently.lesson26.library.search.SearchCriteria;
+import jakarta.validation.Valid;
 import java.io.IOException;
 import java.util.List;
 import java.util.Set;
 import java.util.UUID;
-
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.DeleteMapping;
@@ -14,13 +18,6 @@
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 
-import com.codedifferently.lesson26.library.Librarian;
-import com.codedifferently.lesson26.library.Library;
-import com.codedifferently.lesson26.library.MediaItem;
-import com.codedifferently.lesson26.library.search.SearchCriteria;
-
-import jakarta.validation.Valid;
-
 @RestController
 @CrossOrigin
 public class MediaItemsController {
@@ -42,7 +39,8 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
   }
 
   @PostMapping("/items")
-  public ResponseEntity<CreateMediaItemResponse> postItem(@Valid @RequestBody CreateMediaItemRequest request) {
+  public ResponseEntity<CreateMediaItemResponse> postItem(
+      @Valid @RequestBody CreateMediaItemRequest request) {
     MediaItemRequest itemRequest = request.getItem();
     MediaItem newItem = MediaItemRequest.asMediaItem(itemRequest);
     library.addMediaItem(newItem, librarian);