feat: adds POST, DELELTE, and GET/{id} enpoints to MediaItemsController.java file

Author: OliviaxJames

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

@@ -7,9 +7,14 @@
 import java.io.IOException;
 import java.util.List;
 import java.util.Set;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
@@ -27,8 +32,43 @@ public MediaItemsController(Library library) throws IOException {
   @GetMapping("/items")
   public ResponseEntity<GetMediaItemsResponse> getItems() {
     Set<MediaItem> items = library.search(SearchCriteria.builder().build());
+    if (items.isEmpty()) {
+      return ResponseEntity.notFound().build();
+    }
     List<MediaItemResponse> responseItems = items.stream().map(MediaItemResponse::from).toList();
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<GetMediaItemsResponse> getItem(@PathVariable("id") String id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+    if (items.isEmpty()) {
+      return ResponseEntity.notFound().build();
+    }
+    MediaItemResponse responseItem = MediaItemResponse.from(items.iterator().next());
+    GetMediaItemsResponse response = GetMediaItemsResponse.builder().item(responseItem).build();
+    return ResponseEntity.ok(response);
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<MediaItemResponse> postItem(@RequestBody CreateMediaItemRequest request) {
+    MediaItemRequest item = request.getItem();
+    MediaItem response = MediaItemRequest.asMediaItem(item);
+    MediaItemResponse itemResponse = MediaItemResponse.from(response);
+    CreateMediaItemResponse createItemResponse =
+        CreateMediaItemResponse.builder().item(itemResponse).build();
+    MediaItemResponse createdItem = createItemResponse.getItem();
+    return ResponseEntity.status(HttpStatus.CREATED).body(createdItem);
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity<Void> deleteItem(@PathVariable("id") String id) {
+    Set<MediaItem> item = library.search(SearchCriteria.builder().id(id).build());
+    if (item.isEmpty()) {
+      return ResponseEntity.notFound().build();
+    }
+    library.removeMediaItem(item.iterator().next(), librarian);
+    return ResponseEntity.noContent().build();
+  }
 }