firewallet-mobile/lib/main.dart

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';

Future<void> main() async {
  final prefs = await SharedPreferences.getInstance();

  // Check for the uuid key in the shared preferences
  if (!prefs.containsKey('uuid')) {
    // Create an account using https://api.firewallet.au/account
    // and get the uuid from the response
    final response = await http.post(
      Uri.parse('https://api.firewallet.au/account'),
      headers: <String, String>{
        'Content-Type': 'application/json; charset=UTF-8',
      },
      body: '{}',
    );

    // Get uuid from { "userID": "..." }
    final uuid = jsonDecode(response.body)['userID'];
    // Save the uuid to the shared preferences
    await prefs.setString('uuid', uuid);
  }

  // Get the uuid from the shared preferences
  final String? uuid = prefs.getString('uuid');
  runApp(MyApp(uuid: uuid ?? 'null'));
}

class MyApp extends StatelessWidget {
  const MyApp({
    super.key,
    required this.uuid,
  });

  final String uuid;

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Fire Wallet',
      theme: ThemeData(
        brightness: Brightness.light,
        /* light theme settings */
      ),
      darkTheme: ThemeData(
        brightness: Brightness.dark,
        /* dark theme settings */
      ),
      themeMode: ThemeMode.system,
      debugShowCheckedModeBanner: false,
      home: MyHomePage(uuid: uuid),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({
    super.key,
    required this.uuid,
  });

  final String uuid;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int currentPageIndex = 0;

  @override
  Widget build(BuildContext context) {
    final ThemeData theme = Theme.of(context);
    return Scaffold(
      bottomNavigationBar: NavigationBar(
        onDestinationSelected: (int index) {
          setState(() {
            currentPageIndex = index;
          });
        },
        selectedIndex: currentPageIndex,
        destinations: const <Widget>[
          NavigationDestination(
            selectedIcon: Icon(Icons.home),
            icon: Icon(Icons.home_outlined),
            label: 'Home',
          ),
          NavigationDestination(
            icon: Icon(Icons.text_format_rounded),
            label: 'Domains',
          ),
          NavigationDestination(
            icon: Icon(Icons.receipt),
            label: 'Transactions',
          ),
        ],
      ),
      body: <Widget>[
        /// Home page
        Card(
          shadowColor: Colors.transparent,
          margin: const EdgeInsets.all(8.0),
          child: SizedBox.expand(
            child: Center(
              child: Text(
                'Welcome to Fire Wallet! 🚀',
                style: theme.textTheme.titleLarge,
              ),
            ),
          ),
        ),

        /// Notifications page
        Padding(
          padding: const EdgeInsets.all(8.0),
          child: Column(
            children: <Widget>[
              Card(
                  child: Center(
                      child: Text(
                // UUID of the user
                'UUID: ${widget.uuid}',
              ))),
            ],
          ),
        ),

        /// Messages page
        ListView.builder(
          reverse: true,
          itemCount: 2,
          itemBuilder: (BuildContext context, int index) {
            if (index == 0) {
              return Align(
                alignment: Alignment.centerRight,
                child: Container(
                  margin: const EdgeInsets.all(8.0),
                  padding: const EdgeInsets.all(8.0),
                  decoration: BoxDecoration(
                    color: theme.colorScheme.primary,
                    borderRadius: BorderRadius.circular(8.0),
                  ),
                  child: Text(
                    'Hello',
                    style: theme.textTheme.bodyLarge!
                        .copyWith(color: theme.colorScheme.onPrimary),
                  ),
                ),
              );
            }
            return Align(
              alignment: Alignment.centerLeft,
              child: Container(
                margin: const EdgeInsets.all(8.0),
                padding: const EdgeInsets.all(8.0),
                decoration: BoxDecoration(
                  color: theme.colorScheme.primary,
                  borderRadius: BorderRadius.circular(8.0),
                ),
                child: Text(
                  'Hi!',
                  style: theme.textTheme.bodyLarge!
                      .copyWith(color: theme.colorScheme.onPrimary),
                ),
              ),
            );
          },
        ),
      ][currentPageIndex],
    );
  }
}