selfprivacy.org.app/lib/ui/pages/root_route.dart

import 'package:flutter/material.dart';
import 'package:selfprivacy/logic/cubit/server_installation/server_installation_cubit.dart';
import 'package:selfprivacy/ui/components/brand_tab_bar/brand_tab_bar.dart';
import 'package:selfprivacy/ui/pages/more/more.dart';
import 'package:selfprivacy/ui/pages/providers/providers.dart';
import 'package:selfprivacy/ui/pages/services/services.dart';
import 'package:selfprivacy/ui/pages/users/users.dart';

import 'package:selfprivacy/ui/components/pre_styled_buttons/flash_fab.dart';

class RootPage extends StatefulWidget {
  const RootPage({super.key});

  @override
  State<RootPage> createState() => _RootPageState();
}

class _RootPageState extends State<RootPage> with TickerProviderStateMixin {
  late TabController tabController;

  late final AnimationController _controller = AnimationController(
    duration: const Duration(milliseconds: 400),
    vsync: this,
  );
  late final Animation<double> _animation = CurvedAnimation(
    parent: _controller,
    curve: Curves.fastOutSlowIn,
  );

  @override
  void initState() {
    tabController = TabController(length: 4, vsync: this);
    tabController.addListener(() {
      setState(() {
        tabController.index == 2
            ? _controller.forward()
            : _controller.reverse();
      });
    });
    super.initState();
  }

  @override
  void dispose() {
    tabController.dispose();
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(final BuildContext context) {
    final bool isReady = context.watch<ServerInstallationCubit>().state
        is ServerInstallationFinished;

    return Provider<ChangeTab>(
      create: (final _) => ChangeTab(tabController.animateTo),
      child: Scaffold(
        body: TabBarView(
          controller: tabController,
          children: const [
            ProvidersPage(),
            ServicesPage(),
            UsersPage(),
            MorePage(),
          ],
        ),
        bottomNavigationBar: BrandTabBar(
          controller: tabController,
        ),
        floatingActionButton: isReady
            ? SizedBox(
                height: 104 + 16,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.end,
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: [
                    ScaleTransition(
                      scale: _animation,
                      child: const AddUserFab(),
                    ),
                    const SizedBox(height: 16),
                    const BrandFab(),
                  ],
                ),
              )
            : null,
      ),
    );
  }
}

class ChangeTab {
  ChangeTab(this.onPress);
  final ValueChanged<int> onPress;
}