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新增：首页 Feed 接入真实数据——四态/尾部三态/聚合曝光埋点，社区 demo 消亡第一页（T3-14）
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- home_page Feed segment 改接 CommunityController：骨架屏首载、空态 CTA、
  错误横幅重试、下拉刷新（失败保留旧列表 + SnackBar）、触底游标翻页
  （失败态只走显式重试，不随滚动风暴自动重打）
- PostCard 三形态（单图通栏 4:3 / 多图折叠封面 +N 角标 / 纯文字 6 行）+
  PostMediaGrid（列数规则 + ink 80% scrim 精算）+ LikeButton（error 族修订
  Colors.red，T3-14 纯展示禁用态，ToggleSync 接线留 T3-15/16）+ FeedSkeleton
  （呼吸动效尊重减弱动态设置）；降级作者统一「宠友」占位
- SignedNetworkImage：预签名 URL 缓存 key 剥离 X-Amz-* 签名参数，
  RemoteImage 全仓换用（同图不同签名命中同一缓存条目）
- feed 域埋点：feed_viewed 聚合曝光（浏览段开/结算于切 Tab、切分段、
  退后台、销毁；≥50% 可见 ≥500ms 段内按帖去重，postId 不上报）+
  feed_load_failed（refresh/load_more 双路，会话失效不报）
- integration_test/feed_live_test.dart：compose 六容器 Linux 桌面真链路
  实测入口（PATBOND_FEED_LIVE=1 门控，默认跳过）
- 测试 379 → 421（+42）：四态/尾部三态/翻页不丢不重/降级作者/曝光结算
  时机/缓存 key/事件属性全覆盖；analyze 0，format 无 diff

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Lixi20
2026-09-09 13:01:43 +08:00
parent 1441f0148f
commit 8aac8c52cc
22 changed files with 2401 additions and 212 deletions
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lib/core/widgets/feed_skeleton.dart
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import 'package:flutter/material.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
/// Feed 骨架屏单元（05 号规范 §3.7）：模拟单图卡——头部行（32 圆 +
/// 两条横条）→ 4:3 通栏块 → 两条正文横条。块色 `surfaceTint`
/// （1.18:1，装饰性占位不受对比度约束）。
///
/// 动效：整体不透明度 0.6 ↔ 1.0 呼吸循环 1200ms；系统「减弱动态效果」
/// 开启时静止在 1.0。首载用法为连排 3 张（P1/P4）。
class FeedSkeleton extends StatefulWidget {
const FeedSkeleton({super.key});
@override
State<FeedSkeleton> createState() => _FeedSkeletonState();
}
class _FeedSkeletonState extends State<FeedSkeleton>
with SingleTickerProviderStateMixin {
late final AnimationController _controller;
@override
void initState() {
super.initState();
_controller = AnimationController(
vsync: this,
duration: const Duration(milliseconds: 1200),
lowerBound: 0.6,
value: 1,
);
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
final reduceMotion = MediaQuery.of(context).disableAnimations;
if (reduceMotion) {
_controller.stop();
_controller.value = 1;
} else if (!_controller.isAnimating) {
_controller.repeat(reverse: true);
}
return FadeTransition(
opacity: _controller,
child: Card(
clipBehavior: Clip.antiAlias,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.all(14),
child: Row(
children: [
const _SkeletonBlock(width: 32, height: 32, circle: true),
const SizedBox(width: 10),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_SkeletonBlock(
width: _relative(context, 0.40),
height: 12,
),
const SizedBox(height: 6),
_SkeletonBlock(
width: _relative(context, 0.24),
height: 8,
),
],
),
],
),
),
const AspectRatio(
aspectRatio: 4 / 3,
child: ColoredBox(color: AppColors.surfaceTint),
),
Padding(
padding: const EdgeInsets.all(14),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_SkeletonBlock(width: _relative(context, 0.90), height: 12),
const SizedBox(height: 8),
_SkeletonBlock(width: _relative(context, 0.60), height: 12),
],
),
),
],
),
),
);
}
/// 横条宽度按屏宽比例取（规范 40%/24%/90%/60%），免依赖父约束测量。
double _relative(BuildContext context, double fraction) =>
MediaQuery.of(context).size.width * fraction;
}
class _SkeletonBlock extends StatelessWidget {
const _SkeletonBlock({
required this.width,
required this.height,
this.circle = false,
});
final double width;
final double height;
final bool circle;
@override
Widget build(BuildContext context) {
return Container(
width: width,
height: height,
decoration: BoxDecoration(
color: AppColors.surfaceTint,
borderRadius: BorderRadius.circular(circle ? width / 2 : 6),
),
);
}
}
lib/core/widgets/like_button.dart
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import 'package:flutter/material.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
/// 点赞 / 收藏按钮语义变体（05 号规范 §3.5：同一组件，图标与语义色
/// 参数化）。点赞激活 = `error` 图标 + `errorDark` 计数（demo 的
/// `Colors.red` 3.13:1 修订弃用，D6）；收藏激活 = `accentDark` 同色。
enum LikeButtonVariant {
like(
inactiveIcon: Icons.favorite_border,
activeIcon: Icons.favorite,
activeIconColor: AppColors.error,
activeCountColor: AppColors.errorDark,
),
bookmark(
inactiveIcon: Icons.bookmark_border,
activeIcon: Icons.bookmark,
activeIconColor: AppColors.accentDark,
activeCountColor: AppColors.accentDark,
);
const LikeButtonVariant({
required this.inactiveIcon,
required this.activeIcon,
required this.activeIconColor,
required this.activeCountColor,
});
final IconData inactiveIcon;
final IconData activeIcon;
final Color activeIconColor;
final Color activeCountColor;
}
/// 点赞/收藏交互钮（05 号规范 §3.5 静态规格）：图标 20 + 计数 13/w600，
/// 未激活一律 `inkSoft`（6.59:1）。触控 44×44 由 padding 撑足。
///
/// T3-14 只做展示（[onPressed] 传 null 即禁用态，仍按正常色渲染计数与
/// 状态）；乐观更新动画与 ToggleSync 接线属 T3-15/16。
class LikeButton extends StatelessWidget {
const LikeButton({
required this.variant,
required this.active,
required this.count,
super.key,
this.onPressed,
this.semanticLabel,
});
final LikeButtonVariant variant;
final bool active;
final int count;
final VoidCallback? onPressed;
final String? semanticLabel;
@override
Widget build(BuildContext context) {
final iconColor = active ? variant.activeIconColor : AppColors.inkSoft;
final countColor = active ? variant.activeCountColor : AppColors.inkSoft;
return Semantics(
label: semanticLabel,
button: onPressed != null,
child: InkWell(
onTap: onPressed,
borderRadius: BorderRadius.circular(AppRadius.pill),
child: ConstrainedBox(
constraints: const BoxConstraints(minWidth: 44, minHeight: 44),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 8),
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
Icon(
active ? variant.activeIcon : variant.inactiveIcon,
size: 20,
color: iconColor,
),
const SizedBox(width: 4),
Text(
'$count',
style: TextStyle(
color: countColor,
fontSize: 13,
fontWeight: FontWeight.w600,
),
),
],
),
),
),
),
);
}
}
lib/core/widgets/post_card.dart
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import 'package:flutter/material.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
import 'package:patbond_flutter/core/widgets/like_button.dart';
import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
import 'package:patbond_flutter/core/widgets/post_media_grid.dart';
import 'package:patbond_flutter/features/community/community_display.dart';
import 'package:patbond_flutter/features/community/community_models.dart';
import 'package:patbond_flutter/widgets/common.dart';
/// 帖子卡三形态（05 号规范 §2.1/§3.1）：home 私有 `_PostCard` 的升级
/// 迁移，按媒体形态分支——
///
/// | 形态 | 媒体区 |
/// | --- | --- |
/// | 单图（mediaCount ≤ 1 且有封面） | 通栏出血 4:3 |
/// | 多图（mediaCount > 1） | [PostMediaGrid] 折叠封面（FeedCard 契约只带封面 + 计数），水平 padding 14 |
/// | 纯文字（无封面） | 无媒体区，正文放宽 ≤6 行、15/1.6 |
///
/// 头部行：作者头像 32 + 名字 14/w700 + 时间 12 `inkSoft`；求助帖
/// 元信息尾追加 `TagPill(accent)`。降级作者（[AuthorSummary.isDegraded]）
/// 渲染占位头像 + 「宠友」。操作行：[LikeButton]（点赞 / 收藏）+ 评论
/// 计数 + 分享，各钮触控 44；互动回调传 null 即纯展示（T3-14 形态，
/// ToggleSync 接线属 T3-15/16）。
class PostCard extends StatelessWidget {
const PostCard({
required this.card,
super.key,
this.onTap,
this.onLikeTap,
this.onCommentTap,
this.onBookmarkTap,
this.onShareTap,
this.now,
});
final FeedCard card;
/// 整卡点按（帖子详情入口）。
final VoidCallback? onTap;
final VoidCallback? onLikeTap;
final VoidCallback? onCommentTap;
final VoidCallback? onBookmarkTap;
final VoidCallback? onShareTap;
/// 相对时间的参考时钟（测试注入；缺省取当前时间）。
final DateTime? now;
bool get _isTextOnly => card.coverImage == null;
@override
Widget build(BuildContext context) {
return Card(
clipBehavior: Clip.antiAlias,
child: InkWell(
onTap: onTap,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_header(context),
if (card.coverImage != null)
card.mediaCount > 1
? Padding(
padding: const EdgeInsets.symmetric(horizontal: 14),
child: PostMediaGrid(
urls: [card.coverImage!.url],
totalCount: card.mediaCount,
),
)
: AspectRatio(
aspectRatio: 4 / 3,
child: RemoteImage(url: card.coverImage!.url),
),
_body(context),
_actionRow(),
],
),
),
);
}
Widget _header(BuildContext context) {
return Padding(
padding: const EdgeInsets.all(14),
child: Row(
children: [
PetAvatar(size: PetAvatarSize.sm, url: card.author.avatarUrl),
const SizedBox(width: 10),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
authorDisplayName(card.author),
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: const TextStyle(
fontSize: 14,
fontWeight: FontWeight.w700,
),
),
const SizedBox(height: 2),
Row(
children: [
Text(
feedRelativeTime(card.publishedAt, now: now),
style: const TextStyle(
color: AppColors.inkSoft,
fontSize: 12,
),
),
if (card.category == PostCategory.help) ...[
const SizedBox(width: 6),
const TagPill('求助', color: AppColors.accent),
],
],
),
],
),
),
],
),
);
}
Widget _body(BuildContext context) {
return Padding(
padding: const EdgeInsets.fromLTRB(14, 12, 14, 0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (card.title != null) ...[
Text(
card.title!,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: Theme.of(context).textTheme.titleMedium,
),
const SizedBox(height: 6),
],
Text(
card.contentPreview,
// 纯文字帖放宽至 6 行并升字号补偿视觉重量（§2.1）。
maxLines: _isTextOnly ? 6 : 2,
overflow: TextOverflow.ellipsis,
style: _isTextOnly
? const TextStyle(
color: AppColors.ink,
fontSize: 15,
height: 1.6,
)
: Theme.of(context).textTheme.bodyMedium,
),
],
),
);
}
Widget _actionRow() {
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 2),
child: Row(
children: [
LikeButton(
variant: LikeButtonVariant.like,
active: card.likedByMe,
count: card.likeCount,
onPressed: onLikeTap,
semanticLabel: '点赞',
),
const SizedBox(width: 4),
_CommentCount(count: card.commentCount, onPressed: onCommentTap),
const SizedBox(width: 4),
LikeButton(
variant: LikeButtonVariant.bookmark,
active: card.bookmarkedByMe,
count: card.bookmarkCount,
onPressed: onBookmarkTap,
semanticLabel: '收藏',
),
const Spacer(),
InkWell(
onTap: onShareTap,
borderRadius: BorderRadius.circular(AppRadius.pill),
child: const SizedBox(
width: 44,
height: 44,
child: Icon(
Icons.ios_share_outlined,
size: 20,
color: AppColors.inkSoft,
),
),
),
],
),
);
}
}
/// 评论计数钮（与 LikeButton 同视觉规格，无激活态）。
class _CommentCount extends StatelessWidget {
const _CommentCount({required this.count, this.onPressed});
final int count;
final VoidCallback? onPressed;
@override
Widget build(BuildContext context) {
return InkWell(
onTap: onPressed,
borderRadius: BorderRadius.circular(AppRadius.pill),
child: ConstrainedBox(
constraints: const BoxConstraints(minWidth: 44, minHeight: 44),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 8),
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(
Icons.chat_bubble_outline,
size: 20,
color: AppColors.inkSoft,
),
const SizedBox(width: 4),
Text(
'$count',
style: const TextStyle(
color: AppColors.inkSoft,
fontSize: 13,
fontWeight: FontWeight.w600,
),
),
],
),
),
),
);
}
}
lib/core/widgets/post_media_grid.dart
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import 'package:flutter/material.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
import 'package:patbond_flutter/widgets/common.dart';
/// 图片九宫格展示态（05 号规范 §3.2）。
///
/// - 列数规则：2、4 图 → 2 列；3、5–9 图 → 3 列；全部 1:1 cover、
/// 格间距 4、单格圆角 `sm`(12)，`RemoteImage` 复用（loading tint 块 /
/// 失败图标兜底，缓存 key 已剥签名）。
/// - 超出折叠：最多显 9 格，[totalCount] 超过显示数时末格叠
/// `ink` 80% scrim + 白字「+N」20/w800（合成最亮白图 7.10:1；60% 档
/// 3.88:1 不达标弃用，§5.1 精算）。
/// - 单图折叠形态：Feed 卡片契约只带封面 + mediaCount（FeedCard 裁剪），
/// [urls] 单元素而 [totalCount] > 1 时渲染 4:3 单格 + 右下「+N」角标
/// 胶囊（同 80% scrim 精算）。
///
/// 编辑态（「＋」格 / 删除角标）随发布页工单（T3-17）扩展。
class PostMediaGrid extends StatelessWidget {
const PostMediaGrid({
required this.urls,
super.key,
this.totalCount,
this.onCellTap,
}) : assert(urls.length > 0, 'PostMediaGrid 至少一张图');
/// 可展示的图片 URL（Feed 卡片仅封面一张；详情页全量）。
final List<String> urls;
/// 实际总张数（缺省 = urls.length）；大于可展示数时渲染「+N」。
final int? totalCount;
/// 格子点按（全屏浏览入口，T3-15 详情页接线）。
final ValueChanged<int>? onCellTap;
static const _maxCells = 9;
static const _spacing = 4.0;
int get _effectiveTotal => totalCount ?? urls.length;
/// 列数规则（§3.2）：2、4 → 2 列；其余 → 3 列（1 图不走网格）。
static int columnsFor(int cellCount) =>
(cellCount == 2 || cellCount == 4) ? 2 : 3;
@override
Widget build(BuildContext context) {
if (urls.length == 1) {
return _CollapsedCover(
url: urls.first,
hiddenCount: _effectiveTotal - 1,
onTap: onCellTap == null ? null : () => onCellTap!(0),
);
}
final cellCount = urls.length > _maxCells ? _maxCells : urls.length;
final overflow = _effectiveTotal - cellCount;
final columns = columnsFor(cellCount);
return GridView.builder(
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: columns,
mainAxisSpacing: _spacing,
crossAxisSpacing: _spacing,
),
itemCount: cellCount,
itemBuilder: (context, index) {
final isOverflowCell = overflow > 0 && index == cellCount - 1;
Widget cell = RemoteImage(
url: urls[index],
borderRadius: BorderRadius.circular(AppRadius.sm),
);
if (isOverflowCell) {
cell = Stack(
fit: StackFit.expand,
children: [
cell,
DecoratedBox(
decoration: BoxDecoration(
color: AppColors.ink.withAlpha(204),
borderRadius: BorderRadius.circular(AppRadius.sm),
),
child: Center(
child: Text(
'+$overflow',
style: const TextStyle(
color: Colors.white,
fontSize: 20,
fontWeight: FontWeight.w800,
),
),
),
),
],
);
}
if (onCellTap != null) {
cell = InkWell(
onTap: () => onCellTap!(index),
borderRadius: BorderRadius.circular(AppRadius.sm),
child: cell,
);
}
return cell;
},
);
}
}
/// 单图折叠形态：4:3 圆角封面 + 右下「+N」胶囊角标。
class _CollapsedCover extends StatelessWidget {
const _CollapsedCover({
required this.url,
required this.hiddenCount,
this.onTap,
});
final String url;
final int hiddenCount;
final VoidCallback? onTap;
@override
Widget build(BuildContext context) {
Widget cover = AspectRatio(
aspectRatio: 4 / 3,
child: Stack(
fit: StackFit.expand,
children: [
RemoteImage(
url: url,
borderRadius: BorderRadius.circular(AppRadius.sm),
),
if (hiddenCount > 0)
Positioned(
right: 8,
bottom: 8,
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
decoration: BoxDecoration(
color: AppColors.ink.withAlpha(204),
borderRadius: BorderRadius.circular(AppRadius.pill),
),
child: Text(
'+$hiddenCount',
style: const TextStyle(
color: Colors.white,
fontSize: 12,
fontWeight: FontWeight.w700,
),
),
),
),
],
),
);
if (onTap != null) {
cover = InkWell(
onTap: onTap,
borderRadius: BorderRadius.circular(AppRadius.sm),
child: cover,
);
}
return cover;
}
}