新增：community feature 数据层——契约 v1.3.0 十九操作全覆盖 + ToggleSync 乐观更新状态机（T3-12）

- community_models：community/media 域 DTO 逐字段照冻结契约手写 JSON 映射（Post/FeedCard/PostComment/AuthorSummary 降级形态/媒体两步上传凭据等），未知枚举抛 FormatException 暴露契约漂移；CursorPage 上移 core 复用 - community_repository：13 路径 19 操作全覆盖；createPost/createComment 必带 Idempotency-Key（每次逻辑提交换新键、刷新重放同键）；点赞/收藏/ 关注走 PUT/DELETE 语义幂等 - community_exceptions：v1.3.0 新增 9 码 + 40902 共码类型化异常映射 - toggle_sync：乐观翻转 + 快照回滚 + 单飞合并最终意图 + 代次守卫，点赞/收藏共用一套参数化状态机，权威终态对账收敛 - community_controller：Feed 多页缓存 + 首屏四态 + 尾部加载三态 + 游标拼接 + 刷新代次丢弃旧尾页；详情副本与卡片互动状态同源；reset 清态 - app.dart 装配：community 服务分端口直连（:8084），共享 TokenRefresher，登出同步 reset - 测试 286 → 347（模型映射 / 19 操作线路 / 错误映射 / 竞态序列全覆盖） Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-09-09 12:01:25 +08:00
parent 66f983d680
commit 19bd8c1810
14 changed files with 2867 additions and 28 deletions
@@ -0,0 +1,281 @@
+import 'package:patbond_flutter/core/network/api_client.dart';
+import 'package:patbond_flutter/core/network/api_exception.dart';
+import 'package:patbond_flutter/features/community/community_exceptions.dart';
+import 'package:patbond_flutter/features/community/community_models.dart';
+import 'package:uuid/uuid.dart';
+
+/// community / media 域仓库接口（契约 v1.3.0 的 13 路径 / 19 操作全覆盖；
+/// 页面依赖此抽象，widget / controller 测试注入假实现）。
+///
+/// media 两步上传本单只到协议层（创建上传 / 确认上传）；预签名 PUT
+/// 直传对象存储不走业务信封与 Bearer 鉴权，属 T3-13 独立客户端。
+abstract class CommunityRepository {
+  // ---- media 两步上传（协议层）----
+  Future<MediaUploadCredentials> createMediaUpload(
+    CreateMediaUploadRequest request,
+  );
+  Future<MediaAsset> completeMediaUpload(String assetId);
+
+  // ---- 帖子 CRUD / 发布 ----
+  Future<Post> createPost(CreatePostRequest request);
+  Future<Post> getPost(String postId);
+  Future<Post> updatePost(String postId, UpdatePostRequest request);
+  Future<void> deletePost(String postId);
+  Future<CursorPage<Post>> listMyPosts({
+    int? limit,
+    String? cursor,
+    PostStatus? status,
+  });
+
+  // ---- Feed（cursor 分页）----
+  Future<CursorPage<FeedCard>> getFeed({int? limit, String? cursor});
+
+  // ---- 评论 ----
+  Future<CursorPage<PostComment>> listComments(
+    String postId, {
+    int? limit,
+    String? cursor,
+  });
+  Future<PostComment> createComment(
+    String postId,
+    CreateCommentRequest request,
+  );
+  Future<void> deleteComment(String commentId);
+
+  // ---- 点赞 / 收藏（PUT/DELETE 语义幂等，响应权威终态）----
+  Future<LikeState> likePost(String postId);
+  Future<LikeState> unlikePost(String postId);
+  Future<BookmarkState> bookmarkPost(String postId);
+  Future<BookmarkState> unbookmarkPost(String postId);
+  Future<CursorPage<FeedCard>> listMyBookmarks({int? limit, String? cursor});
+
+  // ---- 关注 ----
+  Future<FollowState> followUser(String userId);
+  Future<FollowState> unfollowUser(String userId);
+  Future<FollowStats> getFollowStats(String userId);
+}
+
+/// 基于 [ApiClient] 的实现。全部端点走 Bearer 鉴权（复用既有 token
+/// 拦截 + 401/40101 单飞刷新重放）；community 域业务错误码升格为类型化异常。
+///
+/// 幂等：createPost / createComment 两个 POST 按契约**必带**
+/// `Idempotency-Key`（1~128 字符；每次逻辑提交换新键；token 刷新后的
+/// 自动重放沿用同一个键——键在本层每次调用生成一次，重放走同一 headers）。
+/// 点赞/收藏/关注为 PUT/DELETE 语义幂等，无需幂等键。
+class ApiCommunityRepository implements CommunityRepository {
+  ApiCommunityRepository({required this._api, this._uuid = const Uuid()});
+
+  final ApiClient _api;
+  final Uuid _uuid;
+
+  Future<Object?> _request(
+    String path, {
+    String method = 'GET',
+    Object? body,
+    Map<String, Object?>? query,
+    bool idempotent = false,
+  }) async {
+    try {
+      return await _api.request(
+        path,
+        method: method,
+        body: body,
+        query: query,
+        headers: idempotent ? {'Idempotency-Key': _uuid.v4()} : null,
+        requiresAuth: true,
+      );
+    } on ApiBusinessException catch (error) {
+      throw mapCommunityBusinessException(error);
+    }
+  }
+
+  Map<String, dynamic> _asMap(Object? data) => data! as Map<String, dynamic>;
+
+  // ---- media ----
+
+  @override
+  Future<MediaUploadCredentials> createMediaUpload(
+    CreateMediaUploadRequest request,
+  ) async {
+    final data = await _request(
+      '/api/v1/media/uploads',
+      method: 'POST',
+      body: request.toJson(),
+    );
+    return MediaUploadCredentials.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<MediaAsset> completeMediaUpload(String assetId) async {
+    // 幂等由服务端保证：已 ready 重复 confirm 返回 200 同一 asset。
+    final data = await _request(
+      '/api/v1/media/uploads/$assetId/complete',
+      method: 'POST',
+    );
+    return MediaAsset.fromJson(_asMap(data));
+  }
+
+  // ---- posts ----
+
+  @override
+  Future<Post> createPost(CreatePostRequest request) async {
+    final data = await _request(
+      '/api/v1/posts',
+      method: 'POST',
+      body: request.toJson(),
+      idempotent: true,
+    );
+    return Post.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<Post> getPost(String postId) async {
+    final data = await _request('/api/v1/posts/$postId');
+    return Post.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<Post> updatePost(String postId, UpdatePostRequest request) async {
+    final data = await _request(
+      '/api/v1/posts/$postId',
+      method: 'PATCH',
+      body: request.toJson(),
+    );
+    return Post.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<void> deletePost(String postId) async {
+    await _request('/api/v1/posts/$postId', method: 'DELETE');
+  }
+
+  @override
+  Future<CursorPage<Post>> listMyPosts({
+    int? limit,
+    String? cursor,
+    PostStatus? status,
+  }) async {
+    final data = await _request(
+      '/api/v1/me/posts',
+      query: {
+        'limit': ?limit,
+        'cursor': ?cursor,
+        if (status != null) 'status': status.name,
+      },
+    );
+    return CursorPage.fromJson(_asMap(data), Post.fromJson);
+  }
+
+  // ---- feed ----
+
+  @override
+  Future<CursorPage<FeedCard>> getFeed({int? limit, String? cursor}) async {
+    final data = await _request(
+      '/api/v1/feed',
+      query: {'limit': ?limit, 'cursor': ?cursor},
+    );
+    return CursorPage.fromJson(_asMap(data), FeedCard.fromJson);
+  }
+
+  // ---- comments ----
+
+  @override
+  Future<CursorPage<PostComment>> listComments(
+    String postId, {
+    int? limit,
+    String? cursor,
+  }) async {
+    final data = await _request(
+      '/api/v1/posts/$postId/comments',
+      query: {'limit': ?limit, 'cursor': ?cursor},
+    );
+    return CursorPage.fromJson(_asMap(data), PostComment.fromJson);
+  }
+
+  @override
+  Future<PostComment> createComment(
+    String postId,
+    CreateCommentRequest request,
+  ) async {
+    final data = await _request(
+      '/api/v1/posts/$postId/comments',
+      method: 'POST',
+      body: request.toJson(),
+      idempotent: true,
+    );
+    return PostComment.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<void> deleteComment(String commentId) async {
+    // 顶层短路径先例：commentId 全局唯一。
+    await _request('/api/v1/comments/$commentId', method: 'DELETE');
+  }
+
+  // ---- interactions ----
+
+  @override
+  Future<LikeState> likePost(String postId) async {
+    final data = await _request('/api/v1/posts/$postId/like', method: 'PUT');
+    return LikeState.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<LikeState> unlikePost(String postId) async {
+    final data = await _request('/api/v1/posts/$postId/like', method: 'DELETE');
+    return LikeState.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<BookmarkState> bookmarkPost(String postId) async {
+    final data = await _request(
+      '/api/v1/posts/$postId/bookmark',
+      method: 'PUT',
+    );
+    return BookmarkState.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<BookmarkState> unbookmarkPost(String postId) async {
+    final data = await _request(
+      '/api/v1/posts/$postId/bookmark',
+      method: 'DELETE',
+    );
+    return BookmarkState.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<CursorPage<FeedCard>> listMyBookmarks({
+    int? limit,
+    String? cursor,
+  }) async {
+    final data = await _request(
+      '/api/v1/me/bookmarks',
+      query: {'limit': ?limit, 'cursor': ?cursor},
+    );
+    return CursorPage.fromJson(_asMap(data), FeedCard.fromJson);
+  }
+
+  // ---- follows ----
+
+  @override
+  Future<FollowState> followUser(String userId) async {
+    final data = await _request('/api/v1/users/$userId/follow', method: 'PUT');
+    return FollowState.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<FollowState> unfollowUser(String userId) async {
+    final data = await _request(
+      '/api/v1/users/$userId/follow',
+      method: 'DELETE',
+    );
+    return FollowState.fromJson(_asMap(data));
+  }
+
+  @override
+  Future<FollowStats> getFollowStats(String userId) async {
+    final data = await _request('/api/v1/users/$userId/follow-stats');
+    return FollowStats.fromJson(_asMap(data));
+  }
+}