implemented chat long-polling and optimistic updates, centralized notification management, optimized avatar caching

2026-05-10 15:47:55 +02:00
parent 6ae396e605
commit 1458d8ce49
15 changed files with 712 additions and 146 deletions
@@ -0,0 +1,69 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:http/http.dart' as http;
+
+import '../../../errors/network_exception.dart';
+import '../../../errors/server_exception.dart';
+import '../../nextcloud_ocs.dart';
+import 'get_chat_params.dart';
+import 'get_chat_response.dart';
+
+/// Long-poll variant of GetChat (`lookIntoFuture=1`). Bypasses [TalkApi]
+/// because that layer treats non-2xx as errors, and we need 304 to be a
+/// normal "no new messages" outcome. `setReadMarker=on` lets the server
+/// move the read cursor whenever the call returns messages.
+class LongPollChat {
+  final String chatToken;
+  final int lastKnownMessageId;
+  final int timeoutSeconds;
+
+  LongPollChat({
+    required this.chatToken,
+    required this.lastKnownMessageId,
+    this.timeoutSeconds = 30,
+  });
+
+  /// Returns the response, or `null` on HTTP 304 (server timeout, nothing new).
+  Future<GetChatResponse?> run() async {
+    final params = GetChatParams(
+      lookIntoFuture: GetChatParamsSwitch.on,
+      timeout: timeoutSeconds,
+      lastKnownMessageId: lastKnownMessageId,
+      includeLastKnown: GetChatParamsSwitch.off,
+      setReadMarker: GetChatParamsSwitch.on,
+      limit: 100,
+    );
+    final uri = NextcloudOcs.uri(
+      'apps/spreed/api/v1/chat/$chatToken',
+      queryParameters: params.toJson(),
+    );
+    final headers = NextcloudOcs.headers();
+
+    final http.Response response;
+    try {
+      response = await http
+          .get(uri, headers: headers)
+          .timeout(Duration(seconds: timeoutSeconds + 15));
+    } on TimeoutException catch (e) {
+      throw NetworkException.timeout(technicalDetails: 'LongPollChat $uri: $e');
+    } on SocketException catch (e) {
+      throw NetworkException(technicalDetails: 'LongPollChat $uri: ${e.message}');
+    } on http.ClientException catch (e) {
+      throw NetworkException(technicalDetails: 'LongPollChat $uri: ${e.message}');
+    }
+
+    final status = response.statusCode;
+    if (status == 304) return null;
+    if (status >= 200 && status < 300) {
+      final decoded = jsonDecode(response.body) as Map<String, dynamic>;
+      return GetChatResponse.fromJson(decoded['ocs'] as Map<String, dynamic>)
+        ..headers = response.headers;
+    }
+    throw ServerException(
+      statusCode: status,
+      technicalDetails: 'LongPollChat $uri: HTTP $status',
+    );
+  }
+}