fluffychat/lib/pages/chat/encryption_button.dart

import 'dart:async';

import 'package:flutter/material.dart';

import 'package:adaptive_dialog/adaptive_dialog.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:future_loading_dialog/future_loading_dialog.dart';
import 'package:matrix/matrix.dart';
import 'package:vrouter/vrouter.dart';

import '../../widgets/matrix.dart';

class EncryptionButton extends StatefulWidget {
  final Room room;
  const EncryptionButton(this.room, {Key? key}) : super(key: key);
  @override
  _EncryptionButtonState createState() => _EncryptionButtonState();
}

class _EncryptionButtonState extends State<EncryptionButton> {
  StreamSubscription? _onSyncSub;

  void _enableEncryptionAction() async {
    if (widget.room.encrypted) {
      VRouter.of(context).toSegments(['rooms', widget.room.id, 'encryption']);
      return;
    }
    if (widget.room.joinRules == JoinRules.public) {
      await showOkAlertDialog(
        useRootNavigator: false,
        context: context,
        okLabel: L10n.of(context)!.ok,
        message: L10n.of(context)!.noEncryptionForPublicRooms,
      );
      return;
    }
    if (await showOkCancelAlertDialog(
          useRootNavigator: false,
          context: context,
          title: L10n.of(context)!.enableEncryption,
          message: widget.room.client.encryptionEnabled
              ? L10n.of(context)!.enableEncryptionWarning
              : L10n.of(context)!.needPantalaimonWarning,
          okLabel: L10n.of(context)!.yes,
          cancelLabel: L10n.of(context)!.cancel,
        ) ==
        OkCancelResult.ok) {
      await showFutureLoadingDialog(
        context: context,
        future: () => widget.room.enableEncryption(),
      );
      // we want to enable the lock icon
      setState(() {});
    }
  }

  @override
  void dispose() {
    _onSyncSub?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    if (widget.room.encrypted) {
      _onSyncSub ??= Matrix.of(context)
          .client
          .onSync
          .stream
          .where((s) => s.deviceLists != null)
          .listen((s) => setState(() {}));
    }
    return FutureBuilder<EncryptionHealthState>(
        future: widget.room.calcEncryptionHealthState(),
        builder: (BuildContext context, snapshot) => IconButton(
              tooltip: widget.room.encrypted
                  ? L10n.of(context)!.encrypted
                  : L10n.of(context)!.encryptionNotEnabled,
              icon: Icon(
                  widget.room.encrypted
                      ? Icons.lock_outlined
                      : Icons.lock_open_outlined,
                  size: 20,
                  color: widget.room.joinRules != JoinRules.public &&
                          !widget.room.encrypted
                      ? Colors.red
                      : snapshot.data == EncryptionHealthState.unverifiedDevices
                          ? Colors.orange
                          : null),
              onPressed: _enableEncryptionAction,
            ));
  }
}