Fix: Lesson 26 working on debugging file"

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

@@ -1,19 +1,34 @@
 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.Map;
 import java.util.Set;
+import java.util.UUID;
+
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.ExceptionHandler;
 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.RequestMapping;
 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
+@RequestMapping("/api")
 public class MediaItemsController {
 
   private final Library library;
@@ -31,4 +46,53 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<MediaItemResponse> getItemById(@PathVariable String id) {
+    try {
+      Set<MediaItem> items = library.search((SearchCriteria.builder().id(id).build()));
+      if (items.isEmpty()) {
+        return ResponseEntity.notFound().build();
+      }
+      MediaItemResponse response = MediaItemResponse.from(items.iterator().next());
+      return ResponseEntity.ok(response);
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.notFound().build();
+    }
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<Object> createItem(@Valid @RequestBody CreateMediaItemRequest request) {
+    try {
+      MediaItem item = MediaItemRequest.asMediaItem(request.getItem());
+      library.addMediaItem(item, librarian);
+      var response = (CreateMediaItemResponse.builder()).item(MediaItemResponse.from(item)).build();
+      return ResponseEntity.ok(response);
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.badRequest().build();
+    }
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity<Void> deleteItemById(@PathVariable("id") String id) {
+    try {
+      UUID uuid = UUID.fromString(id);
+      Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+      if (items.isEmpty()) {
+        return ResponseEntity.notFound().build();
+      }
+      library.removeMediaItem(uuid, librarian);
+      return ResponseEntity.noContent().build();
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.notFound().build();
+    }
+  }
+
+  @ExceptionHandler(MethodArgumentNotValidException.class)
+  public ResponseEntity<Map<String, List<String>>> handleValidationErrors(
+      MethodArgumentNotValidException ex) {
+    List<String> errors =
+        ex.getBindingResult().getFieldErrors().stream().map(FieldError::getDefaultMessage).toList();
+    return ResponseEntity.badRequest().body(Map.of("errors", errors));
+  }
 }