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feat：参照研听的基础工程

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jingyun
2026-06-18 15:02:28 +08:00
commit 364fc837b3
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lib/features/news/application/news_controller.dart
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import 'package:hooks_riverpod/hooks_riverpod.dart';
import '../data/mock_news_repository.dart';
import '../data/news_models.dart';
final newsControllerProvider = StateNotifierProvider<NewsController, NewsState>(
(ref) => NewsController(ref.watch(mockNewsRepositoryProvider)),
);
class NewsState {
const NewsState({required this.items, required this.refreshedAt});
final List<NewsItem> items;
final DateTime refreshedAt;
}
class NewsController extends StateNotifier<NewsState> {
NewsController(this._repository)
: super(
NewsState(
items: _repository.loadFeed(),
refreshedAt: DateTime(2026, 6, 18, 16, 11),
),
);
final MockNewsRepository _repository;
void refresh() {
state = NewsState(
items: _repository.loadFeed(),
refreshedAt: DateTime.now(),
);
}
}
lib/features/news/data/mock_news_repository.dart
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import 'package:hooks_riverpod/hooks_riverpod.dart';
import '../../../common/domain/metal_type.dart';
import 'news_models.dart';
final mockNewsRepositoryProvider = Provider<MockNewsRepository>(
(ref) => MockNewsRepository(),
);
class MockNewsRepository {
List<NewsItem> loadFeed() {
final base = DateTime(2026, 6, 18, 16, 11);
final items = [
NewsItem(
id: 'news_gold_001',
metal: MetalType.gold,
title: '金价维持高位震荡，实物金溢价继续分化',
source: '金值整理',
publishedAt: base.subtract(const Duration(minutes: 18)),
summary: '现货价与品牌零售价之间仍有明显价差，持仓估值应优先看材料价值。',
body: const [
'今日黄金现货价格维持高位震荡，品牌金店挂牌价与现货材料价值之间仍有明显差距。',
'对持有者而言，材料价值更适合用于日常估值；对购买者而言，需要额外关注工费、品牌溢价与回收折扣。',
],
),
NewsItem(
id: 'news_silver_001',
metal: MetalType.silver,
title: '白银跟随工业金属情绪回暖，短线波动放大',
source: '市场简报',
publishedAt: base.subtract(const Duration(hours: 1, minutes: 4)),
summary: '银价弹性较强，饰品材料价值和零售购买价差异更大。',
body: const [
'白银价格今日跟随工业金属情绪回暖，短线波动较黄金更明显。',
'银饰通常包含较高加工与零售成本，材料价值占比可能低于用户直觉。',
],
),
NewsItem(
id: 'news_platinum_001',
metal: MetalType.platinum,
title: '铂金回收报价偏谨慎，饰品估值需看纯度',
source: '金属观察',
publishedAt: base.subtract(const Duration(hours: 2, minutes: 36)),
summary: 'PT950 饰品估值建议按克重、纯度和回收折扣分层查看。',
body: const [
'铂金饰品回收报价通常更依赖门店检测与成色确认，报价口径比现货价格更谨慎。',
'记录持仓时建议保留纯度、克重、购买渠道和成本信息，便于后续估值与盈亏回看。',
],
),
];
return [...items]..sort((a, b) => b.publishedAt.compareTo(a.publishedAt));
}
}
lib/features/news/data/news_models.dart
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import '../../../common/domain/metal_type.dart';
class NewsItem {
const NewsItem({
required this.id,
required this.metal,
required this.title,
required this.source,
required this.publishedAt,
required this.summary,
required this.body,
});
final String id;
final MetalType metal;
final String title;
final String source;
final DateTime publishedAt;
final String summary;
final List<String> body;
}
lib/features/news/presentation/news_page.dart
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import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:shadcn_ui/shadcn_ui.dart';
import '../../../common/widgets/adaptive.dart';
import '../application/news_controller.dart';
class NewsPage extends ConsumerWidget {
const NewsPage({super.key});
@override
Widget build(BuildContext context, WidgetRef ref) {
final news = ref.watch(newsControllerProvider);
final cs = ShadTheme.of(context).colorScheme;
return SafeArea(
top: false,
child: ListView(
padding: const EdgeInsets.fromLTRB(18, 18, 18, 24),
children: [
Center(
child: ConstrainedBox(
constraints: const BoxConstraints(
maxWidth: Adaptive.contentMaxWidth,
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Row(
children: [
Expanded(
child: Text(
'信息整理 · 非投资建议',
style: TextStyle(
color: cs.mutedForeground,
fontSize: 13,
),
),
),
TextButton(
onPressed: () =>
ref.read(newsControllerProvider.notifier).refresh(),
child: const Text('刷新'),
),
],
),
const SizedBox(height: 8),
for (final item in news.items)
Padding(
padding: const EdgeInsets.only(bottom: 10),
child: DecoratedBox(
decoration: BoxDecoration(
color: cs.card,
border: Border.all(color: cs.border),
borderRadius: BorderRadius.circular(12),
),
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Container(
padding: const EdgeInsets.symmetric(
horizontal: 8,
vertical: 3,
),
decoration: BoxDecoration(
color: item.metal.color.withValues(
alpha: 0.12,
),
borderRadius: BorderRadius.circular(999),
),
child: Text(
item.metal.shortLabel,
style: TextStyle(
color: item.metal.color,
fontWeight: FontWeight.w700,
),
),
),
const SizedBox(width: 8),
Text(
'${item.source} · ${item.publishedAt.hour.toString().padLeft(2, '0')}:${item.publishedAt.minute.toString().padLeft(2, '0')}',
style: TextStyle(
color: cs.mutedForeground,
fontSize: 12,
),
),
],
),
const SizedBox(height: 10),
Text(
item.title,
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w700,
color: cs.foreground,
),
),
const SizedBox(height: 8),
Text(
item.summary,
style: TextStyle(
color: cs.mutedForeground,
height: 1.5,
),
),
],
),
),
),
),
],
),
),
),
],
),
);
}
}