My first commit

main.dart

@@ -0,0 +1,116 @@
+import 'package:flutter/material.dart';
+import './screens/category_meals_screen.dart';
+import './screens/meal_detail_screen.dart';
+import './screens/tab_screen.dart';
+import './screens/filters_screen.dart';
+import './screens/categories_screen.dart';
+import './dummy-data.dart';
+import './models/meal.dart';
+
+void main() => runApp(MyApp());
+
+class MyApp extends StatefulWidget {
+  @override
+  _MyAppState createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  Map<String, bool> _filters = {
+    'gluten': false,
+    'lactose': false,
+    'vegan': false,
+    'vegetarian': false,
+  };
+
+  List<Meal> _availableMeals = DUMMY_MEALS;
+  List<Meal> _favoriteMeals = [];
+
+  void _setFilters(Map<String, bool> filterData) {
+    setState(() {
+      _filters = filterData;
+
+      _availableMeals = DUMMY_MEALS.where((meal) {
+        if (_filters['gluten'] && !meal.isGlutenFree) {
+          return false;
+        }
+        if (_filters['lactose'] && !meal.isLactoseFree) {
+          return false;
+        }
+        if (_filters['vegan'] && !meal.isVegan) {
+          return false;
+        }
+        if (_filters['vegetarian'] && !meal.isVegetarian) {
+          return false;
+        }
+        return true;
+      }).toList();
+    });
+  }
+
+  void _toggleFavorite(String mealId) {
+    final existingIndex = _favoriteMeals.indexWhere(
+      (meal) => meal.id == mealId,
+    );
+    if (existingIndex >= 0) {
+      setState(() {
+        _favoriteMeals.removeAt(existingIndex);
+      });
+    } else {
+      setState(() {
+        _favoriteMeals.add(
+          DUMMY_MEALS.firstWhere((meal) => meal.id == mealId),
+        );
+      });
+    }
+  }
+
+  bool _isMealFavorite(String id) {
+    return _favoriteMeals.any((meal) => meal.id == id);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'DeliMeals',
+      theme: ThemeData(
+        primarySwatch: Colors.pink,
+        accentColor: Colors.amber,
+        canvasColor: Color.fromRGBO(255, 254, 229, 1),
+        fontFamily: 'Raleway',
+        textTheme: ThemeData.light().textTheme.copyWith(
+              bodyText1: TextStyle(
+                color: Color.fromRGBO(20, 51, 51, 1),
+              ),
+              bodyText2: TextStyle(
+                color: Color.fromRGBO(20, 51, 51, 1),
+              ),
+              headline6: TextStyle(
+                fontSize: 20,
+                fontFamily: 'RobotoCondensed',
+                fontWeight: FontWeight.bold,
+              ),
+            ),
+      ),
+      // home: CategoriesScreen(),
+      initialRoute: '/',
+      routes: {
+        '/': (ctx) => TabsScreen(_favoriteMeals),
+        CategoryMealsScreen.routeName: (ctx) =>
+            CategoryMealsScreen(_availableMeals),
+        MealDetailScreen.routeName: (ctx) => MealDetailScreen(_toggleFavorite, _isMealFavorite),
+        FiltersScreen.routeName: (ctx) => FiltersScreen(_filters, _setFilters),
+      },
+      onGenerateRoute: (settings) {
+        print(settings.arguments);
+        return MaterialPageRoute(
+          builder: (ctx) => CategoriesScreen(),
+        );
+      },
+      onUnknownRoute: (settings) {
+        return MaterialPageRoute(
+          builder: (ctx) => CategoriesScreen(),
+        );
+      },
+    );
+  }
+}

models/category.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+
+class Category {
+  final String id;
+  final String title;
+  final Color color;
+
+  const Category({
+    @required this.id,
+    @required this.title,
+    this.color = Colors.orange,
+  });
+}

models/meal.dart

@@ -0,0 +1,41 @@
+import 'package:flutter/foundation.dart';
+
+enum Complexity { Simple, Challenging, Hard }
+
+enum Affordability {
+  Affordable,
+  Pricey,
+  Luxurious,
+}
+
+class Meal {
+  final String id;
+  final List<String> categories;
+  final String title;
+  final String imageUrl;
+  final List<String> ingredients;
+  final List<String> steps;
+  final int duration;
+  final Complexity complexity;
+  final Affordability affordability;
+  final bool isGlutenFree;
+  final bool isLactoseFree;
+  final bool isVegan;
+  final bool isVegetarian;
+
+  const Meal({
+    @required this.id,
+    @required this.categories,
+    @required this.title,
+    @required this.imageUrl,
+    @required this.ingredients,
+    @required this.steps,
+    @required this.duration,
+    @required this.complexity,
+    @required this.affordability,
+    @required this.isGlutenFree,
+    @required this.isLactoseFree,
+    @required this.isVegan,
+    @required this.isVegetarian,
+  });
+}

screens/categories_screen.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+import '../dummy-data.dart';
+import '../widgets/category_item.dart';
+
+class CategoriesScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return GridView(
+      padding: const EdgeInsets.all(25),
+      children: DUMMY_CATEGORIES
+          .map(
+            (catData) => CategoryItem(
+              catData.id,
+              catData.title,
+              catData.color,
+            ),
+          )
+          .toList(),
+      gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
+        maxCrossAxisExtent: 200,
+        childAspectRatio: 3 / 2,
+        crossAxisSpacing: 20,
+        mainAxisSpacing: 20,
+      ),
+    );
+  }
+}

screens/category_meals_screen.dart

@@ -0,0 +1,76 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_complete_guide/widgets/meal_item.dart';
+import '../models/meal.dart';
+import '../dummy-data2.dart';
+
+class CategoryMealsScreen extends StatefulWidget {
+  static const routeName = '/category-meals';
+
+  final List<Meal> _availableMeals;
+
+  CategoryMealsScreen(this._availableMeals);
+
+  @override
+  _CategoryMealsScreenState createState() => _CategoryMealsScreenState();
+  // final String categoryId;
+  // final String categoryTitle;
+
+  // CategoryMealsScreen(this.categoryId, this.categoryTitle);
+}
+
+class _CategoryMealsScreenState extends State<CategoryMealsScreen> {
+  String categoryTitle;
+  List<Meal> displayedMeals;
+  var _loadedInitData = false;
+
+  @override
+  void initState() {
+    // ...
+    super.initState();
+  }
+
+  @override
+  void didChangeDependencies() {
+    if (!_loadedInitData) {
+      final routeArgs =
+          ModalRoute.of(context).settings.arguments as Map<String, String>;
+      categoryTitle = routeArgs['title'];
+      final categoryId = routeArgs['id'];
+      displayedMeals = widget._availableMeals.where((meal) {
+        return meal.categories.contains(categoryId);
+      }).toList();
+      _loadedInitData = true;
+    }
+    super.didChangeDependencies();
+  }
+
+  void _removeMeal(String mealId) {
+    setState(() {
+      displayedMeals.removeWhere((meal) => meal.id == mealId);
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(categoryTitle),
+      ),
+      body: Center(
+        child: ListView.builder(
+          itemBuilder: (ctx, index) {
+            return MealItem(
+              id: displayedMeals[index].id,
+              title: displayedMeals[index].title,
+              imageUrl: displayedMeals[index].imageUrl,
+              duration: displayedMeals[index].duration,
+              affordability: displayedMeals[index].affordability,
+              complexity: displayedMeals[index].complexity,
+            );
+          },
+          itemCount: displayedMeals.length,
+        ),
+      ),
+    );
+  }
+}

screens/favorites_screen.dart

@@ -0,0 +1,32 @@
+import 'package:flutter/material.dart';
+import '../models/meal.dart';
+import '../widgets/meal_item.dart';
+
+class FavoritesScreen extends StatelessWidget {
+  final List<Meal> favoriteMeals;
+
+  FavoritesScreen(this.favoriteMeals);
+
+  @override
+  Widget build(BuildContext context) {
+    if (favoriteMeals.isEmpty) {
+      return Center(
+        child: Text('You have no favorites yet - start adding some!'),
+      );
+    } else {
+      return ListView.builder(
+        itemBuilder: (ctx, index) {
+          return MealItem(
+            id: favoriteMeals[index].id,
+            title: favoriteMeals[index].title,
+            imageUrl: favoriteMeals[index].imageUrl,
+            duration: favoriteMeals[index].duration,
+            affordability: favoriteMeals[index].affordability,
+            complexity: favoriteMeals[index].complexity,
+          );
+        },
+        itemCount: favoriteMeals.length,
+      );
+    }
+  }
+}