WIP: add option to vote on polls

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

@@ -0,0 +1,30 @@
+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;
+  }
+}