feat: add files for lesson_23 homework

lesson_23/api/java/api_app/src/main/java/com/codedifferently/lesson23/web/MediaItemsController.java

@@ -1,17 +1,24 @@
 package com.codedifferently.lesson23.web;
 
-import com.codedifferently.lesson23.library.Librarian;
-import com.codedifferently.lesson23.library.Library;
-import com.codedifferently.lesson23.library.MediaItem;
-import com.codedifferently.lesson23.library.search.SearchCriteria;
 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;
 
+import com.codedifferently.lesson23.library.Librarian;
+import com.codedifferently.lesson23.library.Library;
+import com.codedifferently.lesson23.library.MediaItem;
+import com.codedifferently.lesson23.library.search.SearchCriteria;
+
 @RestController
 @CrossOrigin
 public class MediaItemsController {
@@ -31,4 +38,58 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  @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.status(HttpStatus.NOT_FOUND).build();
+    }
+
+    MediaItem item = items.iterator().next();
+    MediaItemResponse response = MediaItemResponse.from(item);
+    return ResponseEntity.ok(response);
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<CreateMediaItemResponse> addItem(@RequestBody CreateMediaItemRequest request) {
+    if (request.getItem() == null) {
+      return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
+    }
+
+    MediaItem item = MediaItemRequest.asMediaItem(request.getItem());
+    library.addMediaItem(item, librarian);
+
+    MediaItemResponse itemResponse = MediaItemResponse.from(item);
+    var response = CreateMediaItemResponse.builder()
+        .item(itemResponse)
+        .build();
+
+    return ResponseEntity.ok(response);
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity<Void> deleteItem(@PathVariable String id) {
+    try {
+      // Convert String id to UUID
+      java.util.UUID uuid = java.util.UUID.fromString(id);
+
+      // Check if item exists before trying to remove
+      if (!library.hasMediaItem(uuid)) {
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+      }
+
+      // Remove the item
+      library.removeMediaItem(uuid, librarian);
+      return ResponseEntity.status(HttpStatus.NO_CONTENT).build();
+
+    } catch (IllegalArgumentException e) {
+      // Invalid UUID format
+      return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
+    } catch (Exception e) {
+      // Handle other exceptions (like MediaItemCheckedOutException)
+      return ResponseEntity.status(HttpStatus.CONFLICT).build();
+    }
+  }
 }