time_progress_tracker/lib/widgets/app_drawer_widget.dart

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_redux/flutter_redux.dart';
import 'package:percent_indicator/circular_percent_indicator.dart';
import 'package:redux/redux.dart';
import 'package:time_progress_tracker/actions/actions.dart';
import 'package:time_progress_tracker/app.dart';
import 'package:time_progress_tracker/models/app_state.dart';
import 'package:time_progress_tracker/models/time_progress.dart';
import 'package:time_progress_tracker/screens/progress_dashboard_screen.dart';
import 'package:time_progress_tracker/screens/progress_detail_screen.dart';
import 'package:time_progress_tracker/selectors/time_progress_selectors.dart';

class AppDrawer extends StatelessWidget {
  final String appVersion;

  AppDrawer({
    Key key,
    @required this.appVersion,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Drawer(
      child: StoreConnector(
        converter: _ViewModel.fromStore,
        onInit: loadTimeProgressListIfUnloaded,
        builder: (context, _ViewModel vm) {
          if (!vm.hasLoaded) {
            return Center(
              child: CircularProgressIndicator(),
            );
          }
          List<Widget> drawerTileList = List<Widget>();
          drawerTileList.add(DrawerHeader(
            child: Text(TimeProgressTrackerApp.name),
            decoration: BoxDecoration(color: Colors.blue),
            margin: EdgeInsets.zero,
          ));
          drawerTileList.add(Container(
            color: Colors.lightBlue,
            margin: EdgeInsets.only(bottom: 8),
            child: ListTile(
              title: Text(ProgressDashboardScreen.title),
              trailing: Icon(Icons.dashboard),
              onTap: () {
                Navigator.pop(context);
                Navigator.pushNamed(context, ProgressDashboardScreen.routeName);
              },
            ),
          ));
          if (vm.currentTimeProgresses.length > 0) {
            for (TimeProgress tp in vm.currentTimeProgresses) {
              drawerTileList.add(ListTile(
                title: Text(tp.name),
                trailing: CircularPercentIndicator(
                  percent: tp.percentDone(),
                  radius: 40,
                  progressColor: Colors.green,
                  backgroundColor: Colors.red,
                  center: FittedBox(
                    fit: BoxFit.scaleDown,
                    child:
                        Text((tp.percentDone() * 100).floor().toString() + "%"),
                  ),
                ),
                onTap: () {
                  Navigator.pop(context);
                  Navigator.pushNamed(
                    context,
                    ProgressDetailScreen.routeName,
                    arguments: ProgressDetailScreenArguments(tp.id),
                  );
                },
              ));
              if (vm.currentTimeProgresses.last != tp) {
                drawerTileList.add(Divider(
                  color: Colors.black12,
                ));
              }
            }
          } else {
            drawerTileList.add(ListTile(
              title: Text("You don't have any tracked time progress."),
            ));
          }
          drawerTileList.add(Divider(
            color: Colors.black38,
          ));
          drawerTileList.add(Container(
            margin: EdgeInsets.only(bottom: 8),
            child: ListTile(
              title: Text("About"),
              onTap: () {
                showAboutDialog(
                    context: context,
                    applicationName: TimeProgressTrackerApp.name,
                    applicationVersion: " Version $appVersion",
                    applicationLegalese: '\u00a9Andreas Fahrecker 2020');
              },
            ),
          ));
          return ListView(
            children: drawerTileList,
          );
        },
      ),
    );
  }
}

class _ViewModel {
  final List<TimeProgress> currentTimeProgresses;
  final bool hasLoaded;

  _ViewModel({
    @required this.currentTimeProgresses,
    @required this.hasLoaded,
  });

  static _ViewModel fromStore(Store<AppState> store) {
    return _ViewModel(
      currentTimeProgresses: currentTimeProgressSelector(store.state),
      hasLoaded: store.state.hasLoaded,
    );
  }
}