feat: Dean Initialize API project with essential mappings

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

@@ -6,10 +6,16 @@
 import com.codedifferently.lesson23.library.search.SearchCriteria;
 import java.io.IOException;
 import java.util.List;
+import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
 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
@@ -31,4 +37,52 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  @GetMapping(value = "items/{id}")
+  public ResponseEntity<GetMediaItemsResponse> getItem(@PathVariable String id) {
+    // gets the media items that matches the id
+    Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+    Optional<MediaItem> mediaItemById = items.stream().findFirst();
+    MediaItemResponse responseItem = null;
+    // if the media exists by the idea return an ok response entity otherwise return not found
+    if (mediaItemById.isPresent()) {
+      responseItem = MediaItemResponse.from(mediaItemById.get());
+      var response = GetMediaItemsResponse.builder().item(responseItem).build();
+      return ResponseEntity.ok(response);
+    }
+    return ResponseEntity.notFound().build();
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<?> addItem(@RequestBody CreateMediaItemRequest requestItem) {
+    if (requestItem == null || requestItem.getItem() == null) {
+      return ResponseEntity.badRequest().body(Map.of("errors", List.of("item is required")));
+    }
+    try {
+      MediaItem mediaItem = MediaItemRequest.asMediaItem(requestItem.getItem());
+      library.addMediaItem(mediaItem, librarian);
+
+      MediaItemResponse itemResponse = MediaItemResponse.from(mediaItem);
+      CreateMediaItemResponse response =
+          CreateMediaItemResponse.builder().item(itemResponse).build();
+      return ResponseEntity.ok(response);
+
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.badRequest().body(Map.of("errors", List.of(e.getMessage())));
+    } catch (Exception e) {
+      return ResponseEntity.badRequest()
+          .body(Map.of("errors", List.of("An unexpected error occurred")));
+    }
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity deleteItem(@PathVariable String id) {
+    Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+    Optional<MediaItem> mediaItemById = items.stream().findFirst();
+    if (mediaItemById.isPresent()) {
+      library.removeMediaItem(mediaItemById.get(), librarian);
+      return ResponseEntity.noContent().build();
+    }
+    return ResponseEntity.notFound().build();
+  }
 }