implemented global user search integration for Talk chats with role-coded badges and direct chat creation logic

lib/api/demo/data/demo_users.dart

@@ -0,0 +1,50 @@
+import '../../marianumconnect/queries/user_search/user_search_response.dart';
+
+/// Demo fixtures for the Talk user search — a small mixed set of teachers and
+/// students, filtered client-side so the demo search feels responsive.
+class DemoUsers {
+  const DemoUsers._();
+
+  static final List<McUserSearchResult> _all = [
+    McUserSearchResult(
+      username: 'm.muster',
+      firstName: 'Maria',
+      lastName: 'Mustermann',
+      userType: 'TEACHER',
+    ),
+    McUserSearchResult(
+      username: 'j.beispiel',
+      firstName: 'Jonas',
+      lastName: 'Beispiel',
+      userType: 'TEACHER',
+    ),
+    McUserSearchResult(
+      username: 'l.schueler',
+      firstName: 'Lena',
+      lastName: 'Schüler',
+      userType: 'STUDENT',
+      className: '9c',
+    ),
+    McUserSearchResult(
+      username: 'p.probe',
+      firstName: 'Paul',
+      lastName: 'Probe',
+      userType: 'STUDENT',
+      className: 'Q2',
+    ),
+  ];
+
+  static List<McUserSearchResult> search(String query) {
+    final q = query.trim().toLowerCase();
+    if (q.length < 2) return const [];
+    return _all
+        .where(
+          (u) =>
+              u.firstName.toLowerCase().contains(q) ||
+              u.lastName.toLowerCase().contains(q) ||
+              u.username.toLowerCase().contains(q) ||
+              '${u.firstName} ${u.lastName}'.toLowerCase().contains(q),
+        )
+        .toList();
+  }
+}

lib/api/demo/demo_marianumconnect.dart

@@ -1,6 +1,7 @@
 import 'data/demo_breaker.dart';
 import 'data/demo_holidays.dart';
 import 'data/demo_timetable.dart';
+import 'data/demo_users.dart';
 
 /// Single source of truth for the MarianumConnect demo responses. The demo
 /// interceptor asks this for the body of any MC request. Read endpoints reuse
@@ -32,6 +33,10 @@ class DemoMarianumConnect {
         return DemoTimetable.holidays().result.map((e) => e.toJson()).toList();
       case 'holidays':
         return DemoHolidays.upcoming().map((e) => e.toJson()).toList();
+      case 'users/search':
+        return DemoUsers.search(query['q']?.toString() ?? '')
+            .map((e) => e.toJson())
+            .toList();
       case 'breaker':
         return DemoBreaker.none().toJson();
       case 'timetable/elements/teachers':

lib/api/marianumcloud/talk/create_room/create_room.dart

@@ -1,16 +1,22 @@
+import 'dart:convert';
+
 import 'package:http/http.dart' as http;
 import 'package:http/http.dart';
 
 import '../talk_api.dart';
 import 'create_room_params.dart';
+import 'create_room_response.dart';
 
-class CreateRoom extends TalkApi {
+class CreateRoom extends TalkApi<CreateRoomResponse> {
   CreateRoomParams params;
 
   CreateRoom(this.params) : super('v4/room', params);
 
   @override
-  Null assemble(String raw) => null;
+  CreateRoomResponse assemble(String raw) {
+    final decoded = jsonDecode(raw) as Map<String, dynamic>;
+    return CreateRoomResponse.fromJson(decoded['ocs'] as Map<String, dynamic>);
+  }
 
   @override
   Future<Response>? request(

lib/api/marianumcloud/talk/create_room/create_room_response.dart

@@ -0,0 +1,27 @@
+import 'package:json_annotation/json_annotation.dart';
+
+import '../../../api_response.dart';
+
+part 'create_room_response.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class CreateRoomResponse extends ApiResponse {
+  final CreateRoomResponseData data;
+
+  CreateRoomResponse(this.data);
+
+  factory CreateRoomResponse.fromJson(Map<String, dynamic> json) =>
+      _$CreateRoomResponseFromJson(json);
+  Map<String, dynamic> toJson() => _$CreateRoomResponseToJson(this);
+}
+
+@JsonSerializable()
+class CreateRoomResponseData {
+  final String token;
+
+  CreateRoomResponseData(this.token);
+
+  factory CreateRoomResponseData.fromJson(Map<String, dynamic> json) =>
+      _$CreateRoomResponseDataFromJson(json);
+  Map<String, dynamic> toJson() => _$CreateRoomResponseDataToJson(this);
+}

lib/api/marianumcloud/talk/create_room/create_room_response.g.dart

@@ -0,0 +1,29 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'create_room_response.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+CreateRoomResponse _$CreateRoomResponseFromJson(Map<String, dynamic> json) =>
+    CreateRoomResponse(
+        CreateRoomResponseData.fromJson(json['data'] as Map<String, dynamic>),
+      )
+      ..headers = (json['headers'] as Map<String, dynamic>?)?.map(
+        (k, e) => MapEntry(k, e as String),
+      );
+
+Map<String, dynamic> _$CreateRoomResponseToJson(CreateRoomResponse instance) =>
+    <String, dynamic>{
+      'headers': ?instance.headers,
+      'data': instance.data.toJson(),
+    };
+
+CreateRoomResponseData _$CreateRoomResponseDataFromJson(
+  Map<String, dynamic> json,
+) => CreateRoomResponseData(json['token'] as String);
+
+Map<String, dynamic> _$CreateRoomResponseDataToJson(
+  CreateRoomResponseData instance,
+) => <String, dynamic>{'token': instance.token};

lib/api/marianumconnect/queries/user_search/user_search.dart

@@ -0,0 +1,30 @@
+import 'package:dio/dio.dart';
+
+import '../../errors/marianumconnect_error.dart';
+import '../../marianumconnect_api.dart';
+import '../../marianumconnect_endpoint.dart';
+import 'user_search_response.dart';
+
+/// Searches active users (students, teachers, staff) via the MarianumConnect
+/// mobile API. Returns each match's Nextcloud username plus role, so the Talk
+/// search can start a direct chat and label results without hitting Nextcloud.
+class UserSearch {
+  final Dio _dio;
+
+  UserSearch({Dio? dio}) : _dio = dio ?? MarianumConnectApi.dio();
+
+  Future<UserSearchResponse> run(String query) async {
+    try {
+      final response = await _dio.get<List<dynamic>>(
+        MarianumConnectEndpoint.resolve('users/search'),
+        queryParameters: {'q': query},
+      );
+      final list = response.data!
+          .map((e) => McUserSearchResult.fromJson(e as Map<String, dynamic>))
+          .toList();
+      return UserSearchResponse(result: list);
+    } on DioException catch (e) {
+      throw mapMarianumConnectError(e);
+    }
+  }
+}

lib/api/marianumconnect/queries/user_search/user_search_response.dart

@@ -0,0 +1,40 @@
+import 'package:json_annotation/json_annotation.dart';
+
+import '../../../api_response.dart';
+
+part 'user_search_response.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class McUserSearchResult {
+  /// Nextcloud-/Talk-Username — dient als `invite` beim Chat-Start.
+  final String username;
+  final String firstName;
+  final String lastName;
+
+  /// STUDENT, TEACHER oder STAFF.
+  final String userType;
+  final String? className;
+
+  McUserSearchResult({
+    required this.username,
+    required this.firstName,
+    required this.lastName,
+    required this.userType,
+    this.className,
+  });
+
+  factory McUserSearchResult.fromJson(Map<String, dynamic> json) =>
+      _$McUserSearchResultFromJson(json);
+  Map<String, dynamic> toJson() => _$McUserSearchResultToJson(this);
+}
+
+@JsonSerializable(explicitToJson: true)
+class UserSearchResponse extends ApiResponse {
+  final List<McUserSearchResult> result;
+
+  UserSearchResponse({required this.result});
+
+  factory UserSearchResponse.fromJson(Map<String, dynamic> json) =>
+      _$UserSearchResponseFromJson(json);
+  Map<String, dynamic> toJson() => _$UserSearchResponseToJson(this);
+}

lib/api/marianumconnect/queries/user_search/user_search_response.g.dart

@@ -0,0 +1,41 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'user_search_response.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+McUserSearchResult _$McUserSearchResultFromJson(Map<String, dynamic> json) =>
+    McUserSearchResult(
+      username: json['username'] as String,
+      firstName: json['firstName'] as String,
+      lastName: json['lastName'] as String,
+      userType: json['userType'] as String,
+      className: json['className'] as String?,
+    );
+
+Map<String, dynamic> _$McUserSearchResultToJson(McUserSearchResult instance) =>
+    <String, dynamic>{
+      'username': instance.username,
+      'firstName': instance.firstName,
+      'lastName': instance.lastName,
+      'userType': instance.userType,
+      'className': instance.className,
+    };
+
+UserSearchResponse _$UserSearchResponseFromJson(Map<String, dynamic> json) =>
+    UserSearchResponse(
+        result: (json['result'] as List<dynamic>)
+            .map((e) => McUserSearchResult.fromJson(e as Map<String, dynamic>))
+            .toList(),
+      )
+      ..headers = (json['headers'] as Map<String, dynamic>?)?.map(
+        (k, e) => MapEntry(k, e as String),
+      );
+
+Map<String, dynamic> _$UserSearchResponseToJson(UserSearchResponse instance) =>
+    <String, dynamic>{
+      'headers': ?instance.headers,
+      'result': instance.result.map((e) => e.toJson()).toList(),
+    };