346c751cbb
迁移统计: - discover_page: _buildError → ErrorStateWidget, _buildEmptyHint → EmptyStateWidget - sticker_library_page: 错误 + 空列表 → 共享组件 - class_page: 错误/班级列表空/日记墙空/话题空 → 共享组件 (4 处) - calendar_page: CalendarError → ErrorStateWidget 统一体验: 所有页面空状态使用一致的 icon + title + subtitle + CTA 布局
648 lines
21 KiB
Dart
648 lines
21 KiB
Dart
// 发现页 — 严格对齐 spec §3.12 discover.html
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//
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// 视觉层级（从上到下）：
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// 1. 搜索框 (pill 形状)
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// 2. 每日推荐卡片 inspiration-card (accent→tertiary 渐变)
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// 3. 热门话题 hot-topics (横向滚动 chips)
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// 4. 精选模板 featured-templates (2 列网格)
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// 5. 达人日记 expert-diaries (纵向列表)
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//
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// 注意：本页是发现/灵感浏览，区别于 /search（主动搜索）
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// 数据来源：GET /diary/discover → DiscoverBloc
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import 'package:flutter/material.dart';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:go_router/go_router.dart';
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import '../../../core/constants/design_tokens.dart';
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import '../../../core/theme/app_colors.dart';
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import '../../../core/theme/app_radius.dart';
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import '../../../core/theme/app_shadows.dart';
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import '../../../core/theme/app_typography.dart';
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import '../../../widgets/empty_state_widget.dart';
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import '../../../widgets/error_state_widget.dart';
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import '../bloc/discover_bloc.dart';
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import '../models/discover_models.dart';
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class DiscoverPage extends StatelessWidget {
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const DiscoverPage({super.key});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: _bgColor(context),
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body: SafeArea(
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child: RefreshIndicator(
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onRefresh: () async {
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context.read<DiscoverBloc>().add(const DiscoverRefresh());
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// 等待状态变化完成
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await context.read<DiscoverBloc>().stream.firstWhere(
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(s) => s is DiscoverLoaded || s is DiscoverError,
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orElse: () => const DiscoverLoaded(DiscoverData()),
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);
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},
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child: BlocBuilder<DiscoverBloc, DiscoverState>(
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builder: (context, state) {
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return SingleChildScrollView(
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physics: const AlwaysScrollableScrollPhysics(),
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padding: const EdgeInsets.symmetric(
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horizontal: DesignTokens.spacing20),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const SizedBox(height: DesignTokens.spacing12),
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_SearchBar(onTap: () => context.push('/search')),
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const SizedBox(height: DesignTokens.spacing20),
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_buildContent(context, state),
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const SizedBox(height: DesignTokens.spacing24),
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],
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),
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);
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},
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),
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),
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),
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);
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}
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/// 根据状态构建主要内容
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Widget _buildContent(BuildContext context, DiscoverState state) {
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return switch (state) {
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DiscoverInitial() => _buildLoading(context),
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DiscoverLoading() => _buildLoading(context),
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DiscoverLoaded(:final data) => _buildLoaded(context, data),
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DiscoverError(:final message) => _buildError(context, message),
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};
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}
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/// 加载中状态 — 骨架占位
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Widget _buildLoading(BuildContext context) {
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return const Column(
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children: [
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_LoadingSkeleton(height: 140),
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SizedBox(height: DesignTokens.spacing24),
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_LoadingSkeleton(height: 44),
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SizedBox(height: DesignTokens.spacing24),
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_LoadingSkeleton(height: 200),
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],
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);
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}
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/// 加载成功 — 渲染真实数据
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Widget _buildLoaded(BuildContext context, DiscoverData data) {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// 每日推荐
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_InspirationCard(item: data.dailyInspiration),
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// 热门话题
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if (data.hotTopics.isNotEmpty) ...[
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const SizedBox(height: DesignTokens.spacing24),
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const _SectionTitle(title: '热门话题'),
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const SizedBox(height: DesignTokens.spacing12),
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_HotTopicsChips(topics: data.hotTopics),
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],
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// 精选模板
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if (data.featuredTemplates.isNotEmpty) ...[
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const SizedBox(height: DesignTokens.spacing24),
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const _SectionTitle(title: '精选模板'),
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const SizedBox(height: DesignTokens.spacing12),
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_FeaturedTemplatesGrid(templates: data.featuredTemplates),
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],
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// 达人日记
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if (data.expertDiaries.isNotEmpty) ...[
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const SizedBox(height: DesignTokens.spacing24),
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const _SectionTitle(title: '达人日记'),
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const SizedBox(height: DesignTokens.spacing12),
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_ExpertDiariesList(diaries: data.expertDiaries),
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],
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// 全部为空时的占位提示
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if (data.dailyInspiration == null &&
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data.hotTopics.isEmpty &&
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data.featuredTemplates.isEmpty &&
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data.expertDiaries.isEmpty)
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_buildEmptyHint(context),
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],
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);
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}
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/// 错误状态
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Widget _buildError(BuildContext context, String message) {
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return ErrorStateWidget(
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message: message,
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onRetry: () =>
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context.read<DiscoverBloc>().add(const DiscoverLoadData()),
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);
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}
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/// 空数据提示
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Widget _buildEmptyHint(BuildContext context) {
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return const EmptyStateWidget(
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icon: Icons.explore_rounded,
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title: '还没有发现内容',
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subtitle: '试试写一篇日记分享给大家吧',
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);
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}
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Color _bgColor(BuildContext context) {
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final theme = Theme.of(context);
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return theme.brightness == Brightness.dark
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? AppColors.bgDark
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: AppColors.bgLight;
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}
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}
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/// 加载骨架占位
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class _LoadingSkeleton extends StatelessWidget {
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const _LoadingSkeleton({required this.height});
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final double height;
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@override
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Widget build(BuildContext context) {
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return Container(
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width: double.infinity,
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height: height,
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decoration: BoxDecoration(
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color: Theme.of(context).colorScheme.surfaceContainerHighest
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.withValues(alpha: 0.3),
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borderRadius: AppRadius.lgBorder,
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),
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);
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}
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}
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/// 1. 搜索框（点击跳转 /search）
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class _SearchBar extends StatelessWidget {
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const _SearchBar({required this.onTap});
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final VoidCallback onTap;
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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return InkWell(
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onTap: onTap,
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borderRadius: AppRadius.pillBorder,
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child: Container(
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height: 48,
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padding:
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const EdgeInsets.symmetric(horizontal: DesignTokens.spacing16),
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decoration: BoxDecoration(
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color: theme.colorScheme.surface,
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borderRadius: AppRadius.pillBorder,
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border: Border.all(color: theme.colorScheme.outlineVariant),
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),
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child: Row(
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children: [
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Icon(Icons.search_rounded,
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size: 20, color: theme.colorScheme.onSurfaceVariant),
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const SizedBox(width: DesignTokens.spacing12),
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Text(
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'搜索日记、模板、话题...',
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style: TextStyle(
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fontSize: 14,
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color: theme.colorScheme.onSurfaceVariant,
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),
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),
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],
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),
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),
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);
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}
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}
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/// 2. 每日推荐卡片（渐变背景）
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class _InspirationCard extends StatelessWidget {
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const _InspirationCard({required this.item});
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final InspirationItem? item;
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@override
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Widget build(BuildContext context) {
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if (item == null) {
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// 无推荐日记时的占位卡片
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return Container(
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width: double.infinity,
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padding: const EdgeInsets.all(DesignTokens.spacing20),
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decoration: BoxDecoration(
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gradient: const LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: [AppColors.accent, AppColors.tertiary],
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),
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borderRadius: AppRadius.lgBorder,
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text('今日推荐',
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style: TextStyle(
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fontSize: 11,
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fontWeight: FontWeight.w600,
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color: Colors.white.withValues(alpha: 0.85),
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letterSpacing: 0.5,
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)),
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const SizedBox(height: DesignTokens.spacing12),
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const Text('今天还没有推荐日记',
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style: TextStyle(fontSize: 16, color: Colors.white)),
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const SizedBox(height: 4),
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Text('写下你的日记，可能出现在这里哦 ✨',
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style: TextStyle(
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fontSize: 12,
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color: Colors.white.withValues(alpha: 0.7))),
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],
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),
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);
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}
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final emoji = DiscoverData.moodToEmoji(item!.mood);
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return Container(
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width: double.infinity,
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padding: const EdgeInsets.all(DesignTokens.spacing20),
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decoration: BoxDecoration(
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gradient: const LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: [AppColors.accent, AppColors.tertiary],
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),
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borderRadius: AppRadius.lgBorder,
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boxShadow: [
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BoxShadow(
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color: AppColors.accent.withValues(alpha: 0.2),
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offset: const Offset(0, 4),
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blurRadius: 14,
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),
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],
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),
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child: Stack(
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children: [
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// 装饰圆
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Positioned(
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right: -20,
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top: -20,
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child: Container(
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width: 120,
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height: 120,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: Colors.white.withValues(alpha: 0.12),
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),
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),
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),
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Positioned(
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left: -10,
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bottom: -20,
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child: Container(
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width: 80,
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height: 80,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: Colors.white.withValues(alpha: 0.08),
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),
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),
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),
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Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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'今日推荐',
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style: TextStyle(
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fontSize: 11,
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fontWeight: FontWeight.w600,
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color: Colors.white.withValues(alpha: 0.85),
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letterSpacing: 0.5,
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),
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),
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const SizedBox(height: DesignTokens.spacing12),
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Row(
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children: [
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Container(
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width: 80,
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height: 80,
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decoration: BoxDecoration(
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color: Colors.white.withValues(alpha: 0.2),
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borderRadius: AppRadius.mdBorder,
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),
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alignment: Alignment.center,
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child: Text(emoji, style: const TextStyle(fontSize: 36)),
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),
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const SizedBox(width: DesignTokens.spacing16),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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item!.title,
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style: const TextStyle(
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fontSize: 20,
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fontWeight: FontWeight.w700,
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color: Colors.white,
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height: 1.25,
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),
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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),
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const SizedBox(height: 6),
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Text(
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'${item!.authorName} · ${_formatDate(item!.date)}',
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style: TextStyle(
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fontSize: 12,
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color: Colors.white.withValues(alpha: 0.75),
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),
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),
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],
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),
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),
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],
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),
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],
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),
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],
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),
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);
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}
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String _formatDate(DateTime date) {
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return '${date.month}月${date.day}日';
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}
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}
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class _SectionTitle extends StatelessWidget {
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const _SectionTitle({required this.title});
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final String title;
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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return Text(
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title,
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style: TextStyle(
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fontFamily: AppTypography.displayFont,
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fontSize: 20,
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fontWeight: FontWeight.w700,
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color: theme.colorScheme.onSurface,
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),
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);
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}
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}
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/// 3. 热门话题（横向滚动 chips）
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class _HotTopicsChips extends StatelessWidget {
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const _HotTopicsChips({required this.topics});
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final List<TagCount> topics;
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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return SizedBox(
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height: 44,
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child: ListView.separated(
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scrollDirection: Axis.horizontal,
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itemCount: topics.length,
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separatorBuilder: (_, __) =>
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const SizedBox(width: DesignTokens.spacing8),
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itemBuilder: (context, index) {
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final isHot = index < 3;
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return Container(
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padding:
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const EdgeInsets.symmetric(horizontal: 14, vertical: 6),
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decoration: BoxDecoration(
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color:
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isHot ? theme.colorScheme.primary : theme.colorScheme.surface,
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borderRadius: AppRadius.pillBorder,
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border: isHot
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? null
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: Border.all(color: theme.colorScheme.outlineVariant),
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),
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alignment: Alignment.center,
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child: Text(
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'#${topics[index].tag}',
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style: TextStyle(
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fontSize: 13,
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fontWeight: FontWeight.w600,
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color: isHot
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? theme.colorScheme.onPrimary
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: theme.colorScheme.onSurface,
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),
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),
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);
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},
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),
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);
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}
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}
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/// 4. 精选模板（2 列网格）
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class _FeaturedTemplatesGrid extends StatelessWidget {
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const _FeaturedTemplatesGrid({required this.templates});
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final List<DiscoverTemplateItem> templates;
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@override
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Widget build(BuildContext context) {
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return GridView.builder(
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shrinkWrap: true,
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physics: const NeverScrollableScrollPhysics(),
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 2,
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mainAxisSpacing: DesignTokens.spacing12,
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crossAxisSpacing: DesignTokens.spacing12,
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childAspectRatio: 0.85,
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),
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itemCount: templates.length,
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itemBuilder: (context, index) {
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final t = templates[index];
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return _TemplateCard(
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emoji: t.emoji,
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name: t.name,
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usage: t.usageText,
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bg: _categoryColor(t.category),
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);
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},
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);
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}
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Color _categoryColor(String? category) {
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return switch (category) {
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'日常' => AppColors.secondarySoftLight,
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'校园' => AppColors.tertiarySoftLight,
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'心情' => AppColors.roseSoftLight,
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'旅行' => AppColors.secondarySoftLight,
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_ => AppColors.secondarySoftLight,
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};
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}
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}
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class _TemplateCard extends StatelessWidget {
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const _TemplateCard({
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required this.emoji,
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required this.name,
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required this.usage,
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required this.bg,
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});
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final String emoji;
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final String name;
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final String usage;
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final Color bg;
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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return Material(
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color: theme.colorScheme.surface,
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borderRadius: AppRadius.mdBorder,
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child: InkWell(
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onTap: () => context.push('/templates'),
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borderRadius: AppRadius.mdBorder,
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child: Container(
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decoration: BoxDecoration(
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borderRadius: AppRadius.mdBorder,
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border: Border.all(color: theme.colorScheme.outlineVariant),
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),
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padding: const EdgeInsets.all(DesignTokens.spacing12),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Container(
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height: 96,
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decoration: BoxDecoration(
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color: bg,
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borderRadius: AppRadius.smBorder,
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),
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alignment: Alignment.center,
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child: Text(emoji, style: const TextStyle(fontSize: 32)),
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),
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const SizedBox(height: DesignTokens.spacing8),
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Text(
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name,
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style: TextStyle(
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fontFamily: AppTypography.displayFont,
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fontSize: 14,
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fontWeight: FontWeight.w600,
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color: theme.colorScheme.onSurface,
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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),
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const SizedBox(height: 2),
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Text(
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usage,
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style: TextStyle(
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fontSize: 11,
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color: theme.colorScheme.onSurfaceVariant),
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),
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],
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),
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),
|
||
),
|
||
);
|
||
}
|
||
}
|
||
|
||
/// 5. 达人日记（纵向列表）
|
||
class _ExpertDiariesList extends StatelessWidget {
|
||
const _ExpertDiariesList({required this.diaries});
|
||
final List<ExpertDiaryItem> diaries;
|
||
|
||
@override
|
||
Widget build(BuildContext context) {
|
||
final theme = Theme.of(context);
|
||
return Column(
|
||
children: diaries.map((diary) {
|
||
return Container(
|
||
margin: const EdgeInsets.only(bottom: DesignTokens.spacing12),
|
||
padding: const EdgeInsets.all(DesignTokens.spacing16),
|
||
decoration: BoxDecoration(
|
||
color: theme.colorScheme.surface,
|
||
borderRadius: AppRadius.mdBorder,
|
||
border: Border.all(color: theme.colorScheme.outlineVariant),
|
||
boxShadow: AppShadows.soft(context),
|
||
),
|
||
child: Row(
|
||
children: [
|
||
Container(
|
||
width: 44,
|
||
height: 44,
|
||
decoration: BoxDecoration(
|
||
color: AppColors.surfaceWarmLight,
|
||
shape: BoxShape.circle,
|
||
),
|
||
alignment: Alignment.center,
|
||
child: Text(diary.authorEmoji,
|
||
style: const TextStyle(fontSize: 20)),
|
||
),
|
||
const SizedBox(width: DesignTokens.spacing12),
|
||
Expanded(
|
||
child: Column(
|
||
crossAxisAlignment: CrossAxisAlignment.start,
|
||
children: [
|
||
Row(
|
||
children: [
|
||
Text(
|
||
diary.authorName,
|
||
style: TextStyle(
|
||
fontSize: 12,
|
||
fontWeight: FontWeight.w600,
|
||
color: theme.colorScheme.onSurfaceVariant,
|
||
),
|
||
),
|
||
const SizedBox(width: DesignTokens.spacing8),
|
||
Text(
|
||
'·',
|
||
style: TextStyle(
|
||
color: theme.colorScheme.onSurfaceVariant),
|
||
),
|
||
const SizedBox(width: DesignTokens.spacing8),
|
||
Expanded(
|
||
child: Text(
|
||
diary.title,
|
||
maxLines: 1,
|
||
overflow: TextOverflow.ellipsis,
|
||
style: TextStyle(
|
||
fontFamily: AppTypography.displayFont,
|
||
fontSize: 15,
|
||
fontWeight: FontWeight.w600,
|
||
color: theme.colorScheme.onSurface,
|
||
),
|
||
),
|
||
),
|
||
],
|
||
),
|
||
const SizedBox(height: 4),
|
||
Text(
|
||
diary.contentPreview.isNotEmpty
|
||
? diary.contentPreview
|
||
: '...',
|
||
maxLines: 2,
|
||
overflow: TextOverflow.ellipsis,
|
||
style: TextStyle(
|
||
fontSize: 13,
|
||
color: theme.colorScheme.onSurfaceVariant,
|
||
height: 1.5,
|
||
),
|
||
),
|
||
],
|
||
),
|
||
),
|
||
const SizedBox(width: DesignTokens.spacing8),
|
||
Row(
|
||
mainAxisSize: MainAxisSize.min,
|
||
children: [
|
||
Icon(Icons.favorite_rounded,
|
||
size: 14, color: AppColors.rose),
|
||
const SizedBox(width: 4),
|
||
Text(
|
||
diary.likeText,
|
||
style: TextStyle(
|
||
fontSize: 11,
|
||
color: theme.colorScheme.onSurfaceVariant),
|
||
),
|
||
],
|
||
),
|
||
],
|
||
),
|
||
);
|
||
}).toList(),
|
||
);
|
||
}
|
||
}
|