fluffychat/lib/pangea/utils/set_class_topic.dart

import 'package:flutter/material.dart';
import 'package:future_loading_dialog/future_loading_dialog.dart';
import 'package:matrix/matrix.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';

void setClassTopic(Room room, BuildContext context) {
    final TextEditingController textFieldController =
        TextEditingController(text: room.topic);
    showDialog(
      context: context,
      useRootNavigator: false,
      builder: (BuildContext context) => AlertDialog(
        title: Text(
          room.isSpace
              ? L10n.of(context)!.classDescription
              : L10n.of(context)!.chatTopic,
        ),
        content: TextField(
          controller: textFieldController,
        ),
        actions: [
          TextButton(
            child: Text(L10n.of(context)!.cancel),
            onPressed: () {
              Navigator.of(context).pop();
            },
          ),
          TextButton(
            child: Text(L10n.of(context)!.ok),
            onPressed: () async {
              if (textFieldController.text == "") return;
              final success = await showFutureLoadingDialog(
                context: context,
                future: () => room.setDescription(textFieldController.text),
              );
              if (success.error == null) {
                ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(
                    content:
                        Text(L10n.of(context)!.groupDescriptionHasBeenChanged),
                  ),
                );
                Navigator.of(context).pop();
              }
            },
          ),
        ],
      ),
    );
}