136 lines
3.3 KiB
Dart
136 lines
3.3 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_navigation/data/dummy_data.dart';
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import 'package:flutter_navigation/screens/categories.dart';
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import 'package:flutter_navigation/screens/meals.dart';
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import 'package:flutter_navigation/widgets/main_drawer.dart';
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import '../models/meal.dart';
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import 'filters.dart';
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const kInitialFilters = {
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Filter.glutenFree: false,
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Filter.lactoseFree: false,
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Filter.vegetarien: false,
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Filter.vegan: false,
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};
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class TabsScreen extends StatefulWidget {
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const TabsScreen({super.key});
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@override
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State<StatefulWidget> createState() {
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return _TabsScreenState();
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}
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}
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class _TabsScreenState extends State<TabsScreen> {
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int _selectedPageIndex = 0;
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final List<Meal> _favoriteMeals = [];
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Map<Filter, bool> _selectedFilters = kInitialFilters;
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void _showInfoMessage(String message) {
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ScaffoldMessenger.of(context).clearSnackBars();
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(message)),
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);
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}
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void _toggleMealFavoriteStatus(Meal meal) {
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final isExisting = _favoriteMeals.contains(meal);
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if (isExisting) {
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setState(() {
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_favoriteMeals.remove(meal);
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_showInfoMessage('Meal is no longer a favorite.');
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});
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} else {
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_favoriteMeals.add(meal);
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_showInfoMessage('Marked as a favorite.');
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}
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}
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void _selectPage(int index) {
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setState(() {
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_selectedPageIndex = index;
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});
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}
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void _setScreen(String identifier) async {
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Navigator.of(context).pop();
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if (identifier == 'filters') {
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final result = await Navigator.of(context).push<Map<Filter, bool>>(
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MaterialPageRoute(
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builder: (ctx) => FiltersScreen(
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currentFilters: _selectedFilters,
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),
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),
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);
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setState(() {
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_selectedFilters = result ?? kInitialFilters;
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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final availableMeals = dummyMeals.where((meal) {
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if (_selectedFilters[Filter.glutenFree]! && !meal.isGlutenFree) {
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return false;
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}
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if (_selectedFilters[Filter.lactoseFree]! && !meal.isLactoseFree) {
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return false;
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}
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if (_selectedFilters[Filter.vegetarien]! && !meal.isVegetarian) {
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return false;
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}
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if (_selectedFilters[Filter.vegan]! && !meal.isVegan) {
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return false;
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}
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return true;
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}).toList();
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Widget activePage = CategoriesScreen(
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onToggleFavorites: _toggleMealFavoriteStatus,
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availableMeals: availableMeals,
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);
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var activePageTitle = 'Categories';
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if (_selectedPageIndex == 1) {
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activePage = MealsScreen(
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meals: _favoriteMeals,
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onToggleFavorites: _toggleMealFavoriteStatus,
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);
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activePageTitle = 'Your Favorites';
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}
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return Scaffold(
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appBar: AppBar(
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title: Text(activePageTitle),
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),
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drawer: MainDrawer(
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onSelectScreen: _setScreen,
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),
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body: activePage,
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bottomNavigationBar: BottomNavigationBar(
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onTap: _selectPage,
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currentIndex: _selectedPageIndex,
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items: const [
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BottomNavigationBarItem(
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icon: Icon(Icons.set_meal),
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label: 'Categories',
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),
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BottomNavigationBarItem(
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icon: Icon(Icons.star),
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label: 'Favorites',
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),
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],
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),
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);
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}
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}
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