chore: Added required API server methods along with the required imports

Author: jbey251

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

@@ -1,13 +1,15 @@
 package com.codedifferently.lesson26.web;
 
+import java.util.List;
+import java.util.UUID;
+
 import com.codedifferently.lesson26.library.Book;
 import com.codedifferently.lesson26.library.Dvd;
 import com.codedifferently.lesson26.library.Magazine;
 import com.codedifferently.lesson26.library.MediaItem;
 import com.codedifferently.lesson26.library.Newspaper;
+
 import jakarta.validation.constraints.NotBlank;
-import java.util.List;
-import java.util.UUID;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;

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

@@ -9,13 +9,17 @@
 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;
 
 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 {
@@ -28,6 +32,8 @@ public MediaItemsController(Library library) throws IOException {
     this.librarian = library.getLibrarians().stream().findFirst().orElseThrow();
   }
 
+  // Gets all media items.
+
   @GetMapping("/items")
   public ResponseEntity<GetMediaItemsResponse> getItems() {
     Set<MediaItem> items = library.search(SearchCriteria.builder().build());
@@ -36,17 +42,42 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     return ResponseEntity.ok(response);
   }
 
+  //
+
     @DeleteMapping("/items/{id}")
   public ResponseEntity<Void> deleteItem(@PathVariable String id) {
     Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
-    
     if (items.isEmpty()) {
       return ResponseEntity.notFound().build();  // Return 404 if item is not found
     }
-    
     MediaItem itemToDelete = items.iterator().next();
     library.removeMediaItem(itemToDelete, librarian);  // Assuming there's a method to remove items in the library
-
     return ResponseEntity.noContent().build();  // Return 204 No Content if deletion is successful
   }
+
+  //
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<MediaItemResponse> getItem(@PathVariable String id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+    if (items.isEmpty()) {
+      return ResponseEntity.notFound().build();  // Return 404 if item is not found
+    }
+    MediaItem item = items.iterator().next();
+    MediaItemResponse response = MediaItemResponse.from(item);
+    return ResponseEntity.ok(response);
+  }
+
+  //
+
+  @PostMapping("/items")
+  public ResponseEntity<CreateMediaItemResponse> createItem(
+      @Valid @RequestBody CreateMediaItemRequest createRequest) {
+    MediaItemRequest itemRequest = createRequest.getItem();
+    MediaItem newItem = MediaItemRequest.asMediaItem(itemRequest);
+    library.addMediaItem(newItem, this.librarian);
+    MediaItemResponse itemResponse = MediaItemResponse.from(newItem);
+    CreateMediaItemResponse response = CreateMediaItemResponse.builder().item(itemResponse).build();
+    return ResponseEntity.ok(response);
+  }
 }