already_running_view.dart

/*
 * This file is part of Stack Wallet.
 *
 * Copyright (c) 2023 Cypher Stack
 * All Rights Reserved.
 * The code is distributed under GPLv3 license, see LICENSE file for details.
 * Generated by Cypher Stack on 2023-05-26
 *
 */

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_svg/svg.dart';
import 'package:google_fonts/google_fonts.dart';

import '../app_config.dart';
import '../themes/stack_colors.dart';
import '../themes/theme_providers.dart';
import '../themes/theme_service.dart';
import '../utilities/stack_file_system.dart';
import '../utilities/text_styles.dart';
import '../utilities/util.dart';
import '../widgets/app_icon.dart';
import '../widgets/background.dart';

/// Root app widget for the "already running" error path.
///
/// Mirrors the theme bootstrap performed by [MaterialAppWithTheme] in main.dart
/// but without touching Hive. Requires Isar + ThemeService to already be
/// initialized before [runApp] is called.
class AlreadyRunningApp extends ConsumerStatefulWidget {
  const AlreadyRunningApp({super.key});

  @override
  ConsumerState<AlreadyRunningApp> createState() => _AlreadyRunningAppState();
}

class _AlreadyRunningAppState extends ConsumerState<AlreadyRunningApp> {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      ref.read(applicationThemesDirectoryPathProvider.notifier).state =
          StackFileSystem.themesDir!.path;
      // The first instance already verified/installed the light theme, so
      // getTheme cannot return null here.
      ref.read(themeProvider.state).state = ref
          .read(pThemeService)
          .getTheme(themeId: "light")!;
    });
  }

  @override
  Widget build(BuildContext context) {
    final colorScheme = ref.watch(colorProvider.state).state;
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: AppConfig.appName,
      theme: ThemeData(
        extensions: [colorScheme],
        fontFamily: GoogleFonts.inter().fontFamily,
        splashColor: Colors.transparent,
      ),
      home: const AlreadyRunningView(),
    );
  }
}

/// Error screen shown when this is a second instance of the app.
///
/// Mirrors [IntroView]'s layout: themed background, logo, app name heading,
/// short description subtitle, then the error message (in label style, smaller
/// than the subtitle) in place of the action buttons.
class AlreadyRunningView extends ConsumerWidget {
  const AlreadyRunningView({super.key});

  static const _errorMessage =
      "${AppConfig.appName} is already running.  "
      "Close the other window and try again.";

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final isDesktop = Util.isDesktop;
    final colors = Theme.of(context).extension<StackColors>()!;
    final stack = ref.watch(
      themeProvider.select((value) => value.assets.stack),
    );

    return Background(
      child: Scaffold(
        backgroundColor: colors.background,
        body: SafeArea(
          child: Center(
            child: !isDesktop
                ? Column(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      const Spacer(flex: 2),
                      Padding(
                        padding: const EdgeInsets.symmetric(horizontal: 16),
                        child: ConstrainedBox(
                          constraints: const BoxConstraints(maxWidth: 300),
                          child: SizedBox(
                            width: 266,
                            height: 266,
                            child: stack.endsWith(".png")
                                ? Image.file(File(stack))
                                : SvgPicture.file(
                                    File(stack),
                                    width: 266,
                                    height: 266,
                                  ),
                          ),
                        ),
                      ),
                      const Spacer(flex: 1),
                      Text(
                        AppConfig.appName,
                        textAlign: TextAlign.center,
                        style: STextStyles.pageTitleH1(context),
                      ),
                      const SizedBox(height: 8),
                      Padding(
                        padding: const EdgeInsets.symmetric(horizontal: 48),
                        child: Text(
                          AppConfig.shortDescriptionText,
                          textAlign: TextAlign.center,
                          style: STextStyles.subtitle(context),
                        ),
                      ),
                      const Spacer(flex: 4),
                      Padding(
                        padding: const EdgeInsets.symmetric(
                          horizontal: 16,
                          vertical: 16,
                        ),
                        child: Text(
                          _errorMessage,
                          textAlign: TextAlign.center,
                          style: STextStyles.label(context),
                        ),
                      ),
                    ],
                  )
                : SizedBox(
                    width: 350,
                    height: 540,
                    child: Column(
                      children: [
                        const Spacer(flex: 2),
                        const SizedBox(
                          width: 130,
                          height: 130,
                          child: AppIcon(),
                        ),
                        const Spacer(flex: 42),
                        Text(
                          AppConfig.appName,
                          textAlign: TextAlign.center,
                          style: STextStyles.pageTitleH1(
                            context,
                          ).copyWith(fontSize: 40),
                        ),
                        const Spacer(flex: 24),
                        Text(
                          AppConfig.shortDescriptionText,
                          textAlign: TextAlign.center,
                          style: STextStyles.subtitle(
                            context,
                          ).copyWith(fontSize: 24),
                        ),
                        const Spacer(flex: 42),
                        Text(
                          _errorMessage,
                          textAlign: TextAlign.center,
                          style: STextStyles.label(
                            context,
                          ).copyWith(fontSize: 18),
                        ),
                        const Spacer(flex: 65),
                      ],
                    ),
                  ),
          ),
        ),
      ),
    );
  }
}