WIP: add option to vote on polls

lib/api/marianumcloud/talk/votePoll/votePoll.dart

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+import 'dart:convert';
+import 'dart:developer';
+
+import 'package:http/http.dart' as http;
+import 'package:http/http.dart';
+
+import '../getPoll/getPollStateResponse.dart';
+import '../talkApi.dart';
+import 'votePollParams.dart';
+
+class VotePoll extends TalkApi {
+  String token;
+  int pollId;
+  VotePoll({required this.token, required this.pollId, required VotePollParams params}) : super('v1/poll/$token/$pollId', params);
+
+  @override
+  GetPollStateResponse assemble(String raw) {
+    log(raw);
+    return GetPollStateResponse.fromJson(jsonDecode(raw)['ocs']);
+  }
+
+  @override
+  Future<Response>? request(Uri uri, Object? body, Map<String, String>? headers) {
+    if(body is VotePollParams) {
+      log(body.toJson().toString());
+      return http.post(uri, headers: headers, body: body.toJson().toString());
+    }
+    return null;
+  }
+}

lib/api/marianumcloud/talk/votePoll/votePollParams.dart

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+import 'package:json_annotation/json_annotation.dart';
+
+import '../../../apiParams.dart';
+
+part 'votePollParams.g.dart';
+
+@JsonSerializable()
+class VotePollParams extends ApiParams {
+  List<int> optionIds;
+
+  VotePollParams({required this.optionIds});
+  factory VotePollParams.fromJson(Map<String, dynamic> json) => _$VotePollParamsFromJson(json);
+  Map<String, dynamic> toJson() => _$VotePollParamsToJson(this);
+}

lib/api/marianumcloud/talk/votePoll/votePollParams.g.dart

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+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'votePollParams.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+VotePollParams _$VotePollParamsFromJson(Map<String, dynamic> json) =>
+    VotePollParams(
+      optionIds: (json['optionIds'] as List<dynamic>)
+          .map((e) => (e as num).toInt())
+          .toList(),
+    );
+
+Map<String, dynamic> _$VotePollParamsToJson(VotePollParams instance) =>
+    <String, dynamic>{
+      'optionIds': instance.optionIds,
+    };