feat: adds getItemById & postItem methods

Author: TatsuyaRyujin

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

@@ -1,17 +1,24 @@
 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 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.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
 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 io.swagger.v3.oas.annotations.parameters.RequestBody;
+
 @RestController
 @CrossOrigin
 public class MediaItemsController {
@@ -31,4 +38,28 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<MediaItemResponse> getItemsById(@PathVariable("id") UUID id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().build());
+
+    if (items.isEmpty()) {
+      return ResponseEntity.notFound().build();
+    }
+
+    MediaItem item = items.iterator().next();
+    return ResponseEntity.ok(MediaItemResponse.from(item));
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<CreateMediaItemResponse> postItem(@RequestBody CreateMediaItemRequest request) {
+    MediaItem newItem = MediaItemRequest.asMediaItem(request.getItem());
+
+    library.addMediaItem(newItem, librarian);
+
+    MediaItemResponse itemResponse = MediaItemResponse.from(newItem);
+    CreateMediaItemResponse response = CreateMediaItemResponse.builder().item(itemResponse).build();
+    
+    return ResponseEntity.ok(response);
+  }
 }