fluffychat/lib/pages/new_private_chat/new_private_chat.dart

import 'package:flutter/material.dart';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:matrix/matrix.dart';
import 'package:permission_handler/permission_handler.dart';

import 'package:fluffychat/pages/new_private_chat/new_private_chat_view.dart';
import 'package:fluffychat/pages/new_private_chat/qr_scanner_modal.dart';
import 'package:fluffychat/utils/fluffy_share.dart';
import 'package:fluffychat/utils/platform_infos.dart';
import 'package:fluffychat/utils/url_launcher.dart';
import 'package:fluffychat/widgets/matrix.dart';

class NewPrivateChat extends StatefulWidget {
  const NewPrivateChat({Key? key}) : super(key: key);

  @override
  NewPrivateChatController createState() => NewPrivateChatController();
}

class NewPrivateChatController extends State<NewPrivateChat> {
  final TextEditingController controller = TextEditingController();
  final FocusNode textFieldFocus = FocusNode();
  final formKey = GlobalKey<FormState>();
  bool loading = false;

  bool _hideFab = true;
  bool _qrUnsupported = true;

  bool get hideFab => !_qrUnsupported && _hideFab;

  static const Set<String> supportedSigils = {'@', '!', '#'};

  static const String prefix = 'https://matrix.to/#/';

  void setHideFab() {
    if (textFieldFocus.hasFocus != _hideFab) {
      setState(() => _hideFab = textFieldFocus.hasFocus);
    }
  }

  @override
  void initState() {
    super.initState();
    _checkQrSupported();
    textFieldFocus.addListener(setHideFab);
  }

  @override
  void dispose() {
    textFieldFocus.removeListener(setHideFab);
    super.dispose();
  }

  void submitAction([_]) async {
    controller.text = controller.text.trim();
    if (!formKey.currentState!.validate()) return;
    UrlLauncher(context, '$prefix${controller.text}').openMatrixToUrl();
  }

  String? validateForm(String? value) {
    if (value!.isEmpty) {
      return L10n.of(context)!.pleaseEnterAMatrixIdentifier;
    }
    if (!controller.text.isValidMatrixId ||
        !supportedSigils.contains(controller.text.sigil)) {
      return L10n.of(context)!.makeSureTheIdentifierIsValid;
    }
    if (controller.text == Matrix.of(context).client.userID) {
      return L10n.of(context)!.youCannotInviteYourself;
    }
    return null;
  }

  void inviteAction() => FluffyShare.share(
        'https://matrix.to/#/${Matrix.of(context).client.userID}',
        context,
      );

  void openScannerAction() async {
    await Permission.camera.request();
    await showModalBottomSheet(
      context: context,
      useRootNavigator: false,
      //useSafeArea: false,
      builder: (_) => const QrScannerModal(),
    );
  }

  @override
  Widget build(BuildContext context) => NewPrivateChatView(this);

  // checks whether Android < 21 in order to support Android KitKat
  void _checkQrSupported() {
    if (!PlatformInfos.isAndroid) _qrUnsupported = false;
    DeviceInfoPlugin().androidInfo.then(
          (info) =>
              setState(() => _qrUnsupported = (info.version.sdkInt ?? 16) < 21),
        );
  }
}