reorg ui into app

lib/app/hooks/use_paging_controller.dart

@@ -0,0 +1,61 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
+
+PagingController<PageKeyType, ItemType>
+usePagingController<PageKeyType, ItemType>({
+  required PageKeyType? Function(PagingState<PageKeyType, ItemType>)
+  getNextPageKey,
+  required FutureOr<List<ItemType>> Function(PageKeyType) fetchPage,
+}) {
+  return use(
+    _PagingControllerHook<PageKeyType, ItemType>(
+      getNextPageKey: getNextPageKey,
+      fetchPage: fetchPage,
+    ),
+  );
+}
+
+class _PagingControllerHook<PageKeyType, ItemType>
+    extends Hook<PagingController<PageKeyType, ItemType>> {
+  const _PagingControllerHook({
+    super.keys,
+    required this.getNextPageKey,
+    required this.fetchPage,
+  });
+
+  final PageKeyType? Function(PagingState<PageKeyType, ItemType>)
+  getNextPageKey;
+  final FutureOr<List<ItemType>> Function(PageKeyType) fetchPage;
+
+  @override
+  HookState<
+    PagingController<PageKeyType, ItemType>,
+    Hook<PagingController<PageKeyType, ItemType>>
+  >
+  createState() => _PagingControllerHookState<PageKeyType, ItemType>();
+}
+
+class _PagingControllerHookState<PageKeyType, ItemType>
+    extends
+        HookState<
+          PagingController<PageKeyType, ItemType>,
+          _PagingControllerHook<PageKeyType, ItemType>
+        > {
+  late final controller = PagingController<PageKeyType, ItemType>(
+    getNextPageKey: hook.getNextPageKey,
+    fetchPage: hook.fetchPage,
+  );
+
+  @override
+  PagingController<PageKeyType, ItemType> build(BuildContext context) =>
+      controller;
+
+  @override
+  void dispose() => controller.dispose();
+
+  @override
+  String get debugLabel => 'usePagingController';
+}