flutter/lib/widgets/nutrition/nutritional_plans_list.dart

/*
 * This file is part of wger Workout Manager <https://github.com/wger-project>.
 * Copyright (C) 2020, 2021 wger Team
 *
 * wger Workout Manager is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * wger Workout Manager is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';
import 'package:wger/l10n/generated/app_localizations.dart';
import 'package:wger/models/nutrition/nutritional_plan.dart';
import 'package:wger/providers/nutrition.dart';
import 'package:wger/screens/nutritional_plan_screen.dart';
import 'package:wger/widgets/core/text_prompt.dart';

class NutritionalPlansList extends StatefulWidget {
  @override
  _NutritionalPlansListState createState() => _NutritionalPlansListState();
}

class _NutritionalPlansListState extends State<NutritionalPlansList> {
  List<NutritionalPlan> _plans = [];
  StreamSubscription? _subscription;

  @override
  void initState() {
    super.initState();
    final stream = Provider.of<NutritionPlansProvider>(
      context,
      listen: false,
    ).watchNutritionPlans();
    _subscription = stream.listen((plans) {
      if (!context.mounted) {
        return;
      }
      setState(() {
        _plans = plans;
      });
    });
  }

  @override
  void dispose() {
    _subscription?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final provider = Provider.of<NutritionPlansProvider>(context, listen: false);

    return _plans.isEmpty
        ? const TextPrompt()
        : ListView.builder(
            padding: const EdgeInsets.all(10.0),
            itemCount: _plans.length,
            itemBuilder: (context, index) {
              final currentPlan = _plans[index];
              return Card(
                child: ListTile(
                  onTap: () {
                    Navigator.of(
                      context,
                    ).pushNamed(NutritionalPlanScreen.routeName, arguments: currentPlan.id);
                  },
                  title: Text(currentPlan.getLabel(context)),
                  subtitle: Text(
                    DateFormat.yMd(
                      Localizations.localeOf(context).languageCode,
                    ).format(currentPlan.creationDate),
                  ),
                  trailing: Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      const VerticalDivider(),
                      IconButton(
                        icon: const Icon(Icons.delete),
                        tooltip: AppLocalizations.of(context).delete,
                        onPressed: () async {
                          await showDialog(
                            context: context,
                            builder: (BuildContext contextDialog) {
                              return AlertDialog(
                                content: Text(
                                  AppLocalizations.of(
                                    context,
                                  ).confirmDelete(currentPlan.description),
                                ),
                                actions: [
                                  TextButton(
                                    child: Text(
                                      MaterialLocalizations.of(context).cancelButtonLabel,
                                    ),
                                    onPressed: () => Navigator.of(contextDialog).pop(),
                                  ),
                                  TextButton(
                                    child: Text(
                                      AppLocalizations.of(context).delete,
                                      style: TextStyle(color: Theme.of(context).colorScheme.error),
                                    ),
                                    onPressed: () {
                                      provider.deletePlan(currentPlan.id!);
                                      Navigator.of(contextDialog).pop();
                                      ScaffoldMessenger.of(context).showSnackBar(
                                        SnackBar(
                                          content: Text(
                                            AppLocalizations.of(context).successfullyDeleted,
                                            textAlign: TextAlign.center,
                                          ),
                                        ),
                                      );
                                    },
                                  ),
                                ],
                              );
                            },
                          );
                        },
                      ),
                    ],
                  ),
                ),
              );
            },
          );
  }
}