flutter/lib/auth/telegram_session_web.dart

import 'dart:js_interop';

import 'package:web/web.dart' as web;

const telegramLoginStorageKey = 'mapflow.telegramLoginData';
const mapflowSessionStorageKey = 'mapflow.sessionToken';
const pendingTelegramLoginStorageKey = 'mapflow.pendingTelegramLoginToken';

@JS('window.Telegram.WebApp.initData')
external JSString? get _telegramInitData;

@JS('JSON.stringify')
external JSString _jsonStringify(JSAny? value);

String telegramInitData() => _telegramInitData?.toDart ?? '';

String telegramLoginData() =>
    web.window.localStorage.getItem(telegramLoginStorageKey) ?? '';

String mapflowSessionToken() =>
    web.window.localStorage.getItem(mapflowSessionStorageKey) ?? '';

String pendingTelegramLoginToken() =>
    web.window.localStorage.getItem(pendingTelegramLoginStorageKey) ?? '';

String telegramLoginTokenFromUrl() {
  final uri = Uri.parse(web.window.location.href);
  return uri.queryParameters['telegram_login'] ?? '';
}

void saveTelegramLoginData(JSAny? user) {
  final encoded = _jsonStringify(user).toDart;
  web.window.localStorage.setItem(telegramLoginStorageKey, encoded);
}

void saveMapflowSessionToken(String token) {
  web.window.localStorage.setItem(mapflowSessionStorageKey, token);
}

void savePendingTelegramLoginToken(String token) {
  web.window.localStorage.setItem(pendingTelegramLoginStorageKey, token);
}

void clearPendingTelegramLoginToken() {
  web.window.localStorage.removeItem(pendingTelegramLoginStorageKey);
}

void openExternalUrl(String url) {
  web.window.open(url, '_blank', 'noopener,noreferrer');
}

void reloadApp() {
  web.window.location.assign(web.window.location.origin);
}