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Merge pull request #32 from K9i-0/feature/add_samples
Chore: new sample
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,186 @@ | ||
| import 'package:example/data/sample_item.dart'; | ||
| import 'package:example/repository/sample_repository.dart'; | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:riverpod_annotation/riverpod_annotation.dart'; | ||
| import 'package:riverpod_paging_utils/riverpod_paging_utils.dart'; | ||
|
|
||
| part 'paging_method_screen.g.dart'; | ||
|
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| @riverpod | ||
| class PageBasedNotifier extends _$PageBasedNotifier | ||
| with PagePagingNotifierMixin<SampleItem> { | ||
| @override | ||
| Future<PagePagingData<SampleItem>> build() => fetch(page: 1); | ||
|
|
||
| @override | ||
| Future<PagePagingData<SampleItem>> fetch({ | ||
| required int page, | ||
| }) async { | ||
| final repository = ref.read(sampleRepositoryProvider); | ||
| final (items, hasMore) = await repository.getByPage(page: page, limit: 50); | ||
| ref.keepAlive(); | ||
|
|
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| return PagePagingData( | ||
| items: items, | ||
| hasMore: hasMore, | ||
| page: page, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| @riverpod | ||
| class OffsetBasedNotifier extends _$OffsetBasedNotifier | ||
| with OffsetPagingNotifierMixin<SampleItem> { | ||
| @override | ||
| Future<OffsetPagingData<SampleItem>> build() => fetch(offset: 0); | ||
|
|
||
| @override | ||
| Future<OffsetPagingData<SampleItem>> fetch({ | ||
| required int offset, | ||
| }) async { | ||
| final repository = ref.read(sampleRepositoryProvider); | ||
| final (items, hasMore) = | ||
| await repository.getByOffset(offset: offset, limit: 75); | ||
| ref.keepAlive(); | ||
|
|
||
| return OffsetPagingData( | ||
| items: items, | ||
| hasMore: hasMore, | ||
| offset: offset + 75, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| @riverpod | ||
| class CursorBasedNotifier extends _$CursorBasedNotifier | ||
| with CursorPagingNotifierMixin<SampleItem> { | ||
| @override | ||
| Future<CursorPagingData<SampleItem>> build() => fetch(cursor: null); | ||
|
|
||
| @override | ||
| Future<CursorPagingData<SampleItem>> fetch({ | ||
| required String? cursor, | ||
| }) async { | ||
| final repository = ref.read(sampleRepositoryProvider); | ||
| final (items, nextCursor) = await repository.getByCursor(cursor); | ||
| ref.keepAlive(); | ||
| final hasMore = nextCursor != null && nextCursor.isNotEmpty; | ||
|
|
||
| return CursorPagingData( | ||
| items: items, | ||
| hasMore: hasMore, | ||
| nextCursor: nextCursor, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| class PagingMethodScreen extends StatelessWidget { | ||
| const PagingMethodScreen._(); | ||
|
|
||
| static Route<void> route() { | ||
| return MaterialPageRoute( | ||
| builder: (context) => const PagingMethodScreen._(), | ||
| ); | ||
| } | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| return DefaultTabController( | ||
| length: 3, | ||
| child: Scaffold( | ||
| appBar: AppBar( | ||
| title: const Text('Paging Method Sample'), | ||
| bottom: const TabBar( | ||
| tabs: [ | ||
| Tab( | ||
| text: 'Page', | ||
| ), | ||
| Tab( | ||
| text: 'Offset', | ||
| ), | ||
| Tab( | ||
| text: 'Cursor', | ||
| ), | ||
| ], | ||
| ), | ||
| ), | ||
| body: TabBarView( | ||
| children: [ | ||
| PagingHelperView( | ||
| provider: pageBasedNotifierProvider, | ||
| futureRefreshable: pageBasedNotifierProvider.future, | ||
| notifierRefreshable: pageBasedNotifierProvider.notifier, | ||
| contentBuilder: (data, widgetCount, endItemView) => | ||
| ListView.builder( | ||
| key: const PageStorageKey<String>('page'), | ||
| itemCount: widgetCount, | ||
| itemBuilder: (context, index) { | ||
| // if the index is last, then | ||
| // return the end item view. | ||
| if (index == widgetCount - 1) { | ||
| return endItemView; | ||
| } | ||
|
|
||
| // Otherwise, build a list tile for each sample item. | ||
| return ListTile( | ||
| key: ValueKey(data.items[index].id), | ||
| title: Text(data.items[index].name), | ||
| subtitle: Text(data.items[index].id), | ||
| ); | ||
| }, | ||
| ), | ||
| ), | ||
| PagingHelperView( | ||
| provider: offsetBasedNotifierProvider, | ||
| futureRefreshable: offsetBasedNotifierProvider.future, | ||
| notifierRefreshable: offsetBasedNotifierProvider.notifier, | ||
| contentBuilder: (data, widgetCount, endItemView) => | ||
| ListView.builder( | ||
| key: const PageStorageKey<String>('offset'), | ||
| itemCount: widgetCount, | ||
| itemBuilder: (context, index) { | ||
| // if the index is last, then | ||
| // return the end item view. | ||
| if (index == widgetCount - 1) { | ||
| return endItemView; | ||
| } | ||
|
|
||
| // Otherwise, build a list tile for each sample item. | ||
| return ListTile( | ||
| key: ValueKey(data.items[index].id), | ||
| title: Text(data.items[index].name), | ||
| subtitle: Text(data.items[index].id), | ||
| ); | ||
| }, | ||
| ), | ||
| ), | ||
| PagingHelperView( | ||
| provider: cursorBasedNotifierProvider, | ||
| futureRefreshable: cursorBasedNotifierProvider.future, | ||
| notifierRefreshable: cursorBasedNotifierProvider.notifier, | ||
| contentBuilder: (data, widgetCount, endItemView) => | ||
| ListView.builder( | ||
| key: const PageStorageKey<String>('cursor'), | ||
| itemCount: widgetCount, | ||
| itemBuilder: (context, index) { | ||
| // if the index is last, then | ||
| // return the end item view. | ||
| if (index == widgetCount - 1) { | ||
| return endItemView; | ||
| } | ||
|
|
||
| // Otherwise, build a list tile for each sample item. | ||
| return ListTile( | ||
| key: ValueKey(data.items[index].id), | ||
| title: Text(data.items[index].name), | ||
| subtitle: Text(data.items[index].id), | ||
| ); | ||
| }, | ||
| ), | ||
| ), | ||
| ], | ||
| ), | ||
| ), | ||
| ); | ||
| } | ||
| } |
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