PIbd-31_Zhirnova_A_E_PMD/lib/main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Рецепты',
      theme: ThemeData(
        scaffoldBackgroundColor: Colors.purple[100],
      ),
      home: RecipeHome(),
    );
  }
}

enum Cuisine { Italian, Indian, Chinese, Georgian }

class Recipe {
  String name;
  Cuisine cuisine;
  List<String> ingredients;
  String imageUrl;
  bool liked;

  Recipe({
    required this.name,
    required this.cuisine,
    required this.ingredients,
    required this.imageUrl,
    this.liked = false,
  });

  String getDetails() {
    return 'Рецепт: $name\nКухня: ${cuisine.toString().split('.').last}\nИнгредиенты: ${ingredients.join(', ')}';
  }
}

class RecipeManager<T extends Recipe> {
  List<T> _recipes = [];

  Future<void> addRecipe(T recipe) async {
    await Future.delayed(Duration(seconds: 1));
    _recipes.add(recipe);
  }

  List<T> getAllRecipes() => _recipes;

  T? getRecipeAt(int index) {
    if (index < _recipes.length) {
      return _recipes[index];
    }
    return null;
  }
}

class RecipeHome extends StatefulWidget {
  @override
  _RecipeHomeState createState() => _RecipeHomeState();
}

class _RecipeHomeState extends State<RecipeHome> {
  final RecipeManager<Recipe> _recipeManager = RecipeManager();
  final TextEditingController _nameController = TextEditingController();
  final TextEditingController _ingredientsController = TextEditingController();
  final TextEditingController _imageUrlController = TextEditingController();
  Cuisine? _selectedCuisine;

  void _addRecipe() {
    final name = _nameController.text;
    final ingredients = _ingredientsController.text.split(',').map((s) => s.trim()).toList();
    final imageUrl = _imageUrlController.text;

    if (name.isNotEmpty && ingredients.isNotEmpty && _selectedCuisine != null && imageUrl.isNotEmpty) {
      final recipe = Recipe(
        name: name,
        cuisine: _selectedCuisine!,
        ingredients: ingredients,
        imageUrl: imageUrl,
      );
      _recipeManager.addRecipe(recipe).then((_) {
        _nameController.clear();
        _ingredientsController.clear();
        _imageUrlController.clear();
        _selectedCuisine = null;
        setState(() {});
      });
    }
  }

  void _likeRecipe(int index) {
    setState(() {
      final recipe = _recipeManager.getRecipeAt(index);
      if (recipe != null) {
        recipe.liked = !recipe.liked;
        final message = recipe.liked ? 'Рецепт добавлен в избранное!' : 'Лайк убран!';
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(message)));
      }
    });
  }

  void _showRecipeDetail(Recipe recipe) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => RecipeDetail(recipe: recipe),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Создание Рецептов')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              controller: _nameController,
              decoration: InputDecoration(labelText: 'Название рецепта'),
            ),
            DropdownButton<Cuisine>(
              hint: Text('Выберите кухню'),
              value: _selectedCuisine,
              onChanged: (Cuisine? newValue) {
                setState(() {
                  _selectedCuisine = newValue;
                });
              },
              items: Cuisine.values.map((Cuisine cuisine) {
                return DropdownMenuItem<Cuisine>(
                  value: cuisine,
                  child: Text(cuisine.toString().split('.').last),
                );
              }).toList(),
            ),
            TextField(
              controller: _ingredientsController,
              decoration: InputDecoration(labelText: 'Ингредиенты (через запятую)'),
            ),
            TextField(
              controller: _imageUrlController,
              decoration: InputDecoration(labelText: 'URL изображения'),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: _addRecipe,
              child: Text('Добавить Рецепт'),
            ),
            SizedBox(height: 20),
            Expanded(
              child: ListView.builder(
                itemCount: _recipeManager.getAllRecipes().length,
                itemBuilder: (context, index) {
                  final recipe = _recipeManager.getRecipeAt(index);
                  return ListTile(
                    leading: recipe != null && recipe.imageUrl.isNotEmpty
                        ? Image.network(recipe.imageUrl, width: 50, height: 50, fit: BoxFit.cover)
                        : null,
                    title: Text(recipe?.name ?? 'Ошибка'),
                    subtitle: Text(recipe?.getDetails() ?? ''),
                    trailing: IconButton(
                      icon: Icon(recipe?.liked == true ? Icons.favorite : Icons.favorite_border),
                      onPressed: () => _likeRecipe(index),
                    ),
                    onTap: () {
                      if (recipe != null) {
                        _showRecipeDetail(recipe);
                      }
                    },
                  );
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class RecipeDetail extends StatelessWidget {
  final Recipe recipe;

  RecipeDetail({required this.recipe});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(recipe.name)),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Image.network(recipe.imageUrl),
            SizedBox(height: 20),
            Text(recipe.getDetails(), style: TextStyle(fontSize: 18)),
          ],
        ),
      ),
    );
  }
}