Feat/dev_lesson_23

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

@@ -1,17 +1,32 @@
 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.ArrayList;
 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.validation.BindingResult;
+import org.springframework.validation.FieldError;
 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;
+
+import jakarta.validation.Valid;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
 @RestController
 @CrossOrigin
 public class MediaItemsController {
@@ -31,4 +46,80 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  private MediaItem findItemById(String id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+    return items.isEmpty() ? null : items.iterator().next();
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<?> createItem(@Valid @RequestBody CreateMediaItemRequest request, BindingResult bindingResult) {
+    // Handle validation errors
+    if (bindingResult.hasErrors() || request.getItem() == null) {
+      List<String> errors = new ArrayList<>();
+
+      if (request.getItem() == null) {
+        errors.add("item is required");
+      } else {
+        for (FieldError error : bindingResult.getFieldErrors()) {
+          errors.add(error.getDefaultMessage());
+        }
+      }
+
+      return ResponseEntity.badRequest().body(new ErrorResponse(errors));
+    }
+
+    try {
+      // Convert request to MediaItem and add to library
+      MediaItem item = MediaItemRequest.asMediaItem(request.getItem());
+      library.addMediaItem(item, librarian);
+
+      // Create response
+      MediaItemResponse itemResponse = MediaItemResponse.from(item);
+      CreateMediaItemResponse response = CreateMediaItemResponse.builder()
+          .item(itemResponse)
+          .build();
+
+      return ResponseEntity.ok(response);
+
+    } catch (Exception e) {
+      List<String> errors = new ArrayList<>();
+      errors.add("Failed to create item: " + e.getMessage());
+      return ResponseEntity.badRequest().body(new ErrorResponse(errors));
+    }
+  }
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<MediaItemResponse> getItem(@PathVariable String id) {
+    MediaItem item = findItemById(id);
+
+    if (item == null) {
+      return ResponseEntity.notFound().build();
+    }
+
+    MediaItemResponse response = MediaItemResponse.from(item);
+    return ResponseEntity.ok(response);
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity<Void> deleteItem(@PathVariable String id) {
+    MediaItem item = findItemById(id);
+
+    if (item == null) {
+      return ResponseEntity.notFound().build();
+    }
+
+    try {
+      library.removeMediaItem(UUID.fromString(id), librarian);
+      return ResponseEntity.noContent().build();
+    } catch (Exception e) {
+      return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
+    }
+  }
+
+  @Data
+  @AllArgsConstructor
+  private static class ErrorResponse {
+    private List<String> errors;
+  }
 }