commit c1ebb10a48f6a3c05f14179c214eb59053d8334e · bretton.dev/coves-mobile

lib/services/api_exceptions.dart

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         FederationException(super.message, {super.originalError})

     

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           : super(statusCode: null);

     

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       }

     

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       /// Validation error

     

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       /// Client-side validation failure (empty content, exceeds limits, etc.)

     

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       class ValidationException extends ApiException {

     

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         ValidationException(super.message) : super(statusCode: null);

     

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       }

+170

lib/services/comment_service.dart

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       import 'package:dio/dio.dart';

     

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       import 'package:flutter/foundation.dart';

     

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       import '../config/environment_config.dart';

     

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       import '../models/coves_session.dart';

     

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       import 'api_exceptions.dart';

     

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       import 'auth_interceptor.dart';

     

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       /// Comment Service

     

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       ///

     

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       /// Handles comment creation through the Coves backend.

     

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       ///

     

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       /// **Architecture with Backend OAuth**:

     

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       /// With sealed tokens, the client cannot write directly to the user's PDS

     

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       /// (no DPoP keys available). Instead, comments go through the Coves backend:

     

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       ///

     

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       /// Mobile Client → Coves Backend (sealed token) → User's PDS (DPoP)

     

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       ///

     

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       /// The backend:

     

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       /// 1. Unseals the token to get the actual access/refresh tokens

     

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       /// 2. Uses stored DPoP keys to sign requests

     

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       /// 3. Writes to the user's PDS on their behalf

     

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       ///

     

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       /// **Backend Endpoint**:

     

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       /// - POST /xrpc/social.coves.community.comment.create

     

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       class CommentService {

     

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         CommentService({

     

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           Future<CovesSession?> Function()? sessionGetter,

     

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           Future<bool> Function()? tokenRefresher,

     

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           Future<void> Function()? signOutHandler,

     

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           Dio? dio,

     

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         }) : _sessionGetter = sessionGetter {

     

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           _dio =

     

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               dio ??

     

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               Dio(

     

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                 BaseOptions(

     

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                   baseUrl: EnvironmentConfig.current.apiUrl,

     

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                   connectTimeout: const Duration(seconds: 30),

     

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                   receiveTimeout: const Duration(seconds: 30),

     

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                   headers: {'Content-Type': 'application/json'},

     

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                 ),

     

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               );

     

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           // Add shared 401 retry interceptor

     

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           _dio.interceptors.add(

     

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             createAuthInterceptor(

     

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               sessionGetter: sessionGetter,

     

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               tokenRefresher: tokenRefresher,

     

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               signOutHandler: signOutHandler,

     

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               serviceName: 'CommentService',

     

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               dio: _dio,

     

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             ),

     

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           );

     

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         }

     

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         final Future<CovesSession?> Function()? _sessionGetter;

     

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         late final Dio _dio;

     

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         /// Create a comment

     

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         ///

     

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         /// Sends comment request to the Coves backend, which writes to the

     

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         /// user's PDS.

     

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         ///

     

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         /// Parameters:

     

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         /// - [rootUri]: AT-URI of the root post (always the original post)

     

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         /// - [rootCid]: CID of the root post

     

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         /// - [parentUri]: AT-URI of the parent (post or comment)

     

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         /// - [parentCid]: CID of the parent

     

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         /// - [content]: Comment text content

     

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         ///

     

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         /// Returns:

     

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         /// - CreateCommentResponse with uri and cid of the created comment

     

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         ///

     

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         /// Throws:

     

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         /// - ApiException for API errors

     

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         /// - AuthenticationException for auth failures

     

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         Future<CreateCommentResponse> createComment({

     

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           required String rootUri,

     

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           required String rootCid,

     

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           required String parentUri,

     

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           required String parentCid,

     

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           required String content,

     

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         }) async {

     

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           try {

     

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             final session = await _sessionGetter?.call();

     

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             if (session == null) {

     

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               throw AuthenticationException(

     

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                 'User not authenticated - no session available',

     

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               );

     

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             }

     

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             if (kDebugMode) {

     

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               debugPrint('💬 Creating comment via backend');

     

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               debugPrint('   Root: $rootUri');

     

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               debugPrint('   Parent: $parentUri');

     

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               debugPrint('   Content length: ${content.length}');

     

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             }

     

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             // Send comment request to backend

     

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             // Note: Authorization header is added by the interceptor

     

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             final response = await _dio.post<Map<String, dynamic>>(

     

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               '/xrpc/social.coves.community.comment.create',

     

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               data: {

     

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                 'reply': {

     

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                   'root': {'uri': rootUri, 'cid': rootCid},

     

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                   'parent': {'uri': parentUri, 'cid': parentCid},

     

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                 },

     

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                 'content': content,

     

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               },

     

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             );

     

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             final data = response.data;

     

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             if (data == null) {

     

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               throw ApiException('Invalid response from server - no data');

     

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             }

     

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             final uri = data['uri'] as String?;

     

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             final cid = data['cid'] as String?;

     

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             if (uri == null || uri.isEmpty || cid == null || cid.isEmpty) {

     

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               throw ApiException(

     

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                 'Invalid response from server - missing uri or cid',

     

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               );

     

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             }

     

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             if (kDebugMode) {

     

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               debugPrint('✅ Comment created: $uri');

     

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             }

     

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             return CreateCommentResponse(uri: uri, cid: cid);

     

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           } on DioException catch (e) {

     

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             if (kDebugMode) {

     

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               debugPrint('❌ Comment creation failed: ${e.message}');

     

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               debugPrint('   Status: ${e.response?.statusCode}');

     

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               debugPrint('   Data: ${e.response?.data}');

     

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             }

     

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             if (e.response?.statusCode == 401) {

     

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               throw AuthenticationException(

     

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                 'Authentication failed. Please sign in again.',

     

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                 originalError: e,

     

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               );

     

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             }

     

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             throw ApiException(

     

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               'Failed to create comment: ${e.message}',

     

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               statusCode: e.response?.statusCode,

     

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               originalError: e,

     

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             );

     

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           } on AuthenticationException {

     

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             rethrow;

     

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           } on ApiException {

     

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             rethrow;

     

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           } on Exception catch (e) {

     

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             throw ApiException('Failed to create comment: $e');

     

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           }

     

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         }

     

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       }

     

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       /// Response from comment creation

     

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       class CreateCommentResponse {

     

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         const CreateCommentResponse({required this.uri, required this.cid});

     

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         /// AT-URI of the created comment record

     

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         final String uri;

     

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         /// CID of the created comment record

     

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         final String cid;

     

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       }

+1 -1

pubspec.lock

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           source: hosted

     

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           version: "1.3.1"

     

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         characters:

     

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       -
           dependency: transitive

     

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           dependency: "direct main"

     

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           description:

     

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             name: characters

     

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             sha256: f71061c654a3380576a52b451dd5532377954cf9dbd272a78fc8479606670803

pubspec.yaml

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         # The following adds the Cupertino Icons font to your application.

     

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         # Use with the CupertinoIcons class for iOS style icons.

     

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         cupertino_icons: ^1.0.8

     

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         characters: ^1.4.0  # Unicode grapheme cluster support for emoji counting

     

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         flutter_secure_storage: ^9.2.2

     

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         shared_preferences: ^2.3.3

     

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         go_router: ^16.3.0