halkyon/apps/train/halkyon_train_flutter/lib/main.dart

import 'dart:io';

import 'package:flutter/services.dart';
import 'package:halkyon_app/halkyon_app.dart';
import 'package:halkyon_train_flutter/src/app/licences.dart';
import 'package:halkyon_train_flutter/src/app/train_app.dart';
import 'package:halkyon_train_flutter/src/app/train_dependencies.dart';
import 'package:halkyon_ui/halkyon_ui.dart';
import 'package:material_ui/material_ui.dart';
import 'package:path/path.dart' as p;
import 'package:serverpod_flutter/serverpod_flutter.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  // Noto Sans' notice (halkyon_ui), the flags' and Unicode CLDR's
  // (halkyon_app), Lucide's for the app's icon, and Polar's where its SDK
  // is linked, on Android.
  registerFontLicenses();
  registerHalkyonAppLicenses();
  registerLucideLicense();
  if (Platform.isAndroid) {
    registerPolarLicense();
  }
  // The instance the build names (`--dart-define=SERVER_URL=…`, or
  // `assets/config.json`): the first offered at the first start.
  final builtIn = Instance.parse(await getServerUrl())!;
  final device = await TrainDevice.create(builtIn: builtIn);
  final instances = InstanceChoice(
    FileInstanceStore(File(p.join(device.support, 'instances.json'))),
    builtIn: builtIn,
    forget: device.storage.forget,
    sharesStorage: device.storage.sharesWith,
  );
  await instances.load(usedBefore: device.storage.usedBefore());
  runApp(
    WhatsNewScope(
      whatsNew: WhatsNew(
        AssetWhatsNewSource(rootBundle),
        FileWhatsNewStore(File(p.join(device.support, 'whats_new.json'))),
        version: device.appVersion,
      ),
      // An instance chosen before: the app ran on this device already.
      usedBefore: instances.current != null,
      child: TrainApp(
        choice: instances,
        // Only an instance of Halkyon Train: one of another Halkyon app's
        // answers too, but holds nothing of this app's.
        checker: ServerpodInstanceChecker(app: 'train'),
        open: (instance) => TrainDependencies.create(instance, device),
      ),
    ),
  );
}