first commit

lib/screens/collections/cubit/collection_cubit.dart

@@ -0,0 +1,61 @@
+import 'package:bloc/bloc.dart';
+import 'package:flutter/material.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:remever/components/notifiers/home_screen_data.dart';
+import 'package:remever/inject.dart';
+
+part 'collection_state.dart';
+part 'collection_cubit.freezed.dart';
+
+class CollectionCubit extends Cubit<CollectionState> {
+  CollectionCubit() : super(CollectionState.loading());
+
+  /// Нотифаер домашнего экрана
+  CollectionData get _cd => getIt<CollectionData>();
+
+  /// Контроллер скролла для коллекции
+  final ScrollController collectionController = ScrollController();
+
+  /// Позиция скролле
+  double _previousScrollOffset = 0.0;
+
+  /// Индекс выбранной фильтрации коллекции
+  int collectionFiltersIndex = 0;
+
+  void initScrollListener() {
+    collectionController.addListener(() {
+      final double currentScrollOffset = collectionController.offset;
+      final bool isScrollingDown = currentScrollOffset > _previousScrollOffset;
+
+      if (isScrollingDown) {
+        _cd.showFab(false);
+      } else {
+        _cd.showFab(true);
+      }
+
+      _previousScrollOffset = currentScrollOffset;
+    });
+  }
+
+  @override
+  Future<void> close() {
+    collectionController.dispose();
+    return super.close();
+  }
+
+  Future<void> toLoadingState() async {
+    emit(CollectionState.loading());
+  }
+
+  Future<void> toDataState() async {
+    emit(CollectionState.data());
+  }
+
+  Future<void> toEmptyState() async {
+    emit(CollectionState.empty());
+  }
+
+  Future<void> toErrorState() async {
+    emit(CollectionState.error());
+  }
+}