feat: added getItem, deleteItem and postItem endpoints implementation for lesson26 by Yemi

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

@@ -33,7 +33,7 @@ public class MediaItemRequest {
 
   public static MediaItem asMediaItem(MediaItemRequest request) {
     var id = request.id != null ? request.id : UUID.randomUUID();
-    switch (request.type.toUpperCase()) {
+    switch (request.type.toLowerCase()) {
       case "book" -> {
         return new Book(id, request.title, request.isbn, List.of(request.authors), request.pages);
       }

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

@@ -7,8 +7,15 @@
 import java.io.IOException;
 import java.util.List;
 import java.util.Set;
+import java.util.UUID;
+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
@@ -29,4 +36,46 @@ public GetMediaItemsResponse getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return response;
   }
+
+  @GetMapping("/items/{id}")
+  public GetMediaItemsResponse getItem(@PathVariable UUID id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().build());
+    List<MediaItemResponse> responseItem =
+        items.stream()
+            .map(MediaItemResponse::from) // Transform the original objects
+            .filter(item -> item.getId().equals(id))
+            .toList();
+    var response = GetMediaItemsResponse.builder().items(responseItem).build();
+
+    return response;
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity<Object> deleteItem(@PathVariable UUID id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().build());
+    List<MediaItemResponse> itemToDelete =
+        items.stream()
+            .map(MediaItemResponse::from) // Transform the original objects
+            .filter(item -> item.getId().equals(id))
+            .toList();
+
+    if (!itemToDelete.isEmpty()) {
+      library.removeMediaItem(id, librarian);
+      return ResponseEntity.status(HttpStatus.OK).body("media item deleted successfully");
+    }
+    return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Media deletion not successful");
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<Object> addItem(@RequestBody MediaItemRequest mediaItemRequest) {
+
+    MediaItem mediaItem = MediaItemRequest.asMediaItem(mediaItemRequest);
+    library.addMediaItem(mediaItem, librarian);
+
+    if (null == mediaItem) {
+      return ResponseEntity.status(HttpStatus.BAD_REQUEST)
+          .body("media item creation not successful");
+    }
+    return ResponseEntity.status(HttpStatus.CREATED).body("new media item created successfully");
+  }
 }