66 lines
2.0 KiB
Dart
66 lines
2.0 KiB
Dart
import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../../backend/backend.dart';
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import '../../../core/utils/result.dart';
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final viewedControllerProvider =
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AsyncNotifierProvider<ViewedController, List<ViewedTimelineGroup>>(
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ViewedController.new,
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);
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class ViewedController extends AsyncNotifier<List<ViewedTimelineGroup>> {
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@override
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Future<List<ViewedTimelineGroup>> build() => _load();
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Future<void> refresh() async {
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state = AsyncData(await _load());
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}
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Future<void> clear() async {
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await ref.read(viewedHistoryServiceProvider).clearHistory();
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ref.invalidate(viewedKeysProvider);
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state = const AsyncData([]);
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}
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Future<List<ViewedTimelineGroup>> _load() async {
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final result =
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await ref.read(viewedHistoryServiceProvider).getViewedPostEntries();
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if (result is! Success<List<ViewedPostEntry>>) return const [];
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return groupViewedTimeline(result.data);
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}
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}
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class ViewedTimelineGroup {
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const ViewedTimelineGroup({required this.label, required this.items});
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final String label;
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final List<ViewedPostEntry> items;
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}
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List<ViewedTimelineGroup> groupViewedTimeline(
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List<ViewedPostEntry> entries, {
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DateTime? now,
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}) {
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final today = DateTime(now?.year ?? DateTime.now().year,
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now?.month ?? DateTime.now().month, now?.day ?? DateTime.now().day);
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final buckets = <String, List<ViewedPostEntry>>{};
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for (final entry in entries) {
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final date =
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DateTime(entry.viewedAt.year, entry.viewedAt.month, entry.viewedAt.day);
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final days = today.difference(date).inDays;
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final label = switch (days) {
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0 => 'Today',
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1 => 'Yesterday',
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_ => _dateLabel(date),
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};
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buckets.putIfAbsent(label, () => []).add(entry);
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}
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return [
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for (final entry in buckets.entries)
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ViewedTimelineGroup(label: entry.key, items: entry.value),
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];
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}
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String _dateLabel(DateTime date) =>
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'${date.year.toString().padLeft(4, '0')}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
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