feat: adds media item controller methods

only failed test is simply for addItems where status expects 200 but is actually 400

Author: AmiyahJo

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

@@ -1,16 +1,28 @@
 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 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.RestController;
 
+import com.codedifferently.lesson26.library.Librarian;
+import com.codedifferently.lesson26.library.Library;
+import com.codedifferently.lesson26.library.MediaItem;
+import com.codedifferently.lesson26.library.exceptions.MediaItemCheckedOutException;
+import com.codedifferently.lesson26.library.search.SearchCriteria;
+
+import io.swagger.v3.oas.annotations.parameters.RequestBody;
+import jakarta.validation.Valid;
+
 @RestController
 @CrossOrigin
 public class MediaItemsController {
@@ -29,4 +41,52 @@ public GetMediaItemsResponse getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return response;
   }
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<MediaItemResponse> getItemById(@PathVariable("id") 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<?> addItem(@Valid @RequestBody MediaItemRequest request) {
+    if (request == null) {
+        return ResponseEntity.badRequest().body(Map.of("errors", List.of("Missing required fields")));
+    }
+
+    MediaItem newItem;
+    try {
+        newItem = MediaItemRequest.asMediaItem(request);
+    } catch (IllegalArgumentException e) {
+        return ResponseEntity.badRequest().body(Map.of("errors", List.of("Unknown media item type: " + request.getType())));
+    }
+
+    library.addMediaItem(newItem, new Librarian("Jane Doe", "[email protected]")); 
+
+    return ResponseEntity.ok(Map.of("item", Map.of("id", newItem.getId().toString())));
+}
+
+@DeleteMapping("/items/{id}")
+  public ResponseEntity<Map<String, List<String>>> deleteItem(@PathVariable("id") 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();
+
+    try {
+      library.removeMediaItem(item, librarian);
+    } catch (MediaItemCheckedOutException e) {
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST)
+          .body(Map.of("errors", List.of(e.getMessage())));
+    }
+
+    return ResponseEntity.noContent().build();
+ }
 }