diameter/lib/screens/accuracy_list.dart

import 'package:diameter/components/dialogs.dart';
import 'package:diameter/components/progress_indicator.dart';
import 'package:diameter/config.dart';
import 'package:diameter/navigation.dart';
import 'package:diameter/screens/accuracy_detail.dart';
import 'package:flutter/material.dart';
import 'package:diameter/models/accuracy.dart';

class AccuracyListScreen extends StatefulWidget {
  static const String routeName = '/accuracies';
  const AccuracyListScreen({Key? key}) : super(key: key);

  @override
  _AccuracyListScreenState createState() => _AccuracyListScreenState();
}

class _AccuracyListScreenState extends State<AccuracyListScreen> {
  late Future<List<Accuracy>?> _accuracies;

  void refresh({String? message}) {
    setState(() {
      _accuracies = Accuracy.fetchAll();
    });

    setState(() {
      if (message != null) {
        var snackBar = SnackBar(
          content: Text(message),
          duration: const Duration(seconds: 2),
        );
        ScaffoldMessenger.of(context)
          ..removeCurrentSnackBar()
          ..showSnackBar(snackBar);
      }
    });
  }

  void onDelete(Accuracy accuracy) {
    accuracy.delete().then((_) => refresh(message: 'Accuracy deleted'));
  }

  void handleDeleteAction(Accuracy accuracy) async {
    if (showConfirmationDialogOnDelete) {
      Dialogs.showConfirmationDialog(
        context: context,
        onConfirm: () => onDelete(accuracy),
        message: 'Are you sure you want to delete this Accuracy?',
      );
    } else {
      onDelete(accuracy);
    }
  }

  void handleToggleForPortionSizeAction(Accuracy accuracy) async {
    await Accuracy.update(
      accuracy.objectId!,
      forPortionSize: !accuracy.forPortionSize,
    );
    refresh();
  }

  void handleToggleForCarbsRatioAction(Accuracy accuracy) async {
    await Accuracy.update(
      accuracy.objectId!,
      forCarbsRatio: !accuracy.forCarbsRatio,
    );
    refresh();
  }

  @override
  void initState() {
    super.initState();
    refresh();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Accuracies'),
        actions: <Widget>[
          IconButton(onPressed: refresh, icon: const Icon(Icons.refresh))
        ],
      ),
      drawer: const Navigation(currentLocation: AccuracyListScreen.routeName),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Expanded(
            child: FutureBuilder<List<Accuracy>?>(
                future: _accuracies,
                builder: (context, snapshot) {
                  return ViewWithProgressIndicator(
                      snapshot: snapshot,
                      child: snapshot.data == null || snapshot.data!.isEmpty
                          ? Row(
                              mainAxisAlignment: MainAxisAlignment.center,
                              children: const [
                                Padding(
                                  padding: EdgeInsets.all(10.0),
                                  child: Text('No Accuracies'),
                                )
                              ],
                            )
                          : ListView.builder(
                              padding: const EdgeInsets.only(top: 10.0),
                              itemCount: snapshot.data != null
                                  ? snapshot.data!.length
                                  : 0,
                              itemBuilder: (context, index) {
                                final accuracy = snapshot.data![index];
                                return ListTile(
                                  onTap: () {
                                    Navigator.push(
                                      context,
                                      MaterialPageRoute(
                                        builder: (context) =>
                                            AccuracyDetailScreen(
                                                accuracy: accuracy),
                                      ),
                                    ).then(
                                        (message) => refresh(message: message));
                                  },
                                  title: Text(accuracy.value),
                                  leading: Row(
                                    mainAxisSize: MainAxisSize.min,
                                    children: [
                                      IconButton(
                                        icon: const Icon(Icons.reorder),
                                        onPressed: () {
                                          // TODO: implement reordering
                                        },
                                      ),
                                    ],
                                  ),
                                  trailing: Row(
                                    mainAxisSize: MainAxisSize.min,
                                    children: [
                                      IconButton(
                                          icon: Icon(Icons.square_foot,
                                              color: accuracy.forPortionSize
                                                  ? Colors.blue
                                                  : Colors.grey.shade300),
                                          onPressed: () =>
                                              handleToggleForPortionSizeAction(
                                                  accuracy)),
                                      IconButton(
                                        icon: Icon(Icons.pie_chart,
                                            color: accuracy.forCarbsRatio
                                                ? Colors.blue
                                                : Colors.grey.shade300),
                                        onPressed: () =>
                                            handleToggleForCarbsRatioAction(
                                                accuracy),
                                      ),
                                      const SizedBox(width: 24),
                                      IconButton(
                                        icon: const Icon(
                                          Icons.delete,
                                          color: Colors.blue,
                                        ),
                                        onPressed: () =>
                                            handleDeleteAction(accuracy),
                                      )
                                    ],
                                  ),
                                );
                              }));
                }),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => const AccuracyDetailScreen(),
              )).then((message) => refresh(message: message));
        },
        child: const Icon(Icons.add),
      ),
    );
  }
}