refactor(diary): Diary cubit

lib/features/diary/presentation/bloc/diary_cubit.dart

@@ -0,0 +1,21 @@
+import 'package:eatvio_app/core/app_export.dart';
+import 'package:eatvio_app/features/diary/presentation/bloc/diary_state.dart';
+import 'package:eatvio_app/features/diary/repositories/diary_repository.dart';
+
+class DiaryCubit extends Cubit<DiaryState> {
+  final DiaryRepository blogPostRepository;
+
+  DiaryCubit({required this.blogPostRepository})
+      : super(const DiaryState.loading());
+
+  loadDiary(String blogPostID) async {
+    emit(const DiaryState.loading());
+    try {
+      final blogPost = await blogPostRepository.getDiary(blogPostID);
+      emit(DiaryState.loaded(blogPost: blogPost));
+    } catch (e) {
+      emit(DiaryState.error(errorMessage: e.toString()));
+      print(e);
+    }
+  }
+}

lib/features/diary/presentation/bloc/diary_state.dart

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+import 'package:eatvio_app/features/diary/models/diary_model.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'diary_state.freezed.dart';
+
+@freezed
+abstract class DiaryState with _$DiaryState {
+  const factory DiaryState() = _DiaryState;
+
+  const factory DiaryState.loading() = DiaryStateLoading;
+
+  const factory DiaryState.loaded({
+    required DiaryModel blogPost,
+  }) = DiaryStateLoaded;
+
+  const factory DiaryState.error({
+    required String errorMessage,
+  }) = DiaryStateError;
+}