Laba_2

lib/ApplicationAuto.dart

@@ -0,0 +1,117 @@
+import 'dart:async';
+
+enum CarType { sedan, suv, truck, coupe, hatchback }
+
+class Car {
+  final String brand;
+  final CarType type;
+  final double price;
+
+  Car(this.brand, this.type, this.price);
+
+  void displayInfo() {
+    print('Car: $brand, Type: ${carTypeToString(type)}, Price: \$${price.toStringAsFixed(2)}');
+  }
+
+  static String carTypeToString(CarType type) {
+    switch (type) {
+      case CarType.sedan:
+        return 'Sedan';
+      case CarType.suv:
+        return 'SUV';
+      case CarType.truck:
+        return 'Truck';
+      case CarType.coupe:
+        return 'Coupe';
+      case CarType.hatchback:
+        return 'Hatchback';
+      default:
+        return 'Unknown';
+    }
+  }
+}
+
+extension CarExtension on Car {
+  String get detailedInfo => 'Detailed Info: Brand: $brand, Type: ${Car.carTypeToString(type)}, Price: \$${price.toStringAsFixed(2)}';
+}
+
+class AutoCenter<T extends Car> {
+  final List<T> cars = [];
+
+  void addCar(T car) {
+    cars.add(car);
+  }
+
+  List<T> findCarsByType(CarType type) {
+    return cars.where((car) => car.type == type).toList();
+  }
+
+  void showAllCars() {
+    for (var car in cars) {
+      car.displayInfo();
+    }
+  }
+}
+
+class PriceFilter {
+  static List<T> filterByPrice<T extends Car>(List<T> cars, double minPrice, double maxPrice) {
+    return cars.where((car) => car.price >= minPrice && car.price <= maxPrice).toList();
+  }
+}
+
+class ApplicationAuto {
+  final AutoCenter<Car> autoCenter = AutoCenter<Car>();
+
+
+  Future<List<Car>> fetchCarsFromDatabase() async {
+    return Future.delayed(Duration(seconds: 2), () {
+      return [
+        Car('Toyota', CarType.sedan, 25000),
+        Car('Ford', CarType.suv, 35000),
+        Car('Chevrolet', CarType.truck, 40000),
+        Car('BMW', CarType.coupe, 55000),
+        Car('Volkswagen', CarType.hatchback, 20000),
+      ];
+    });
+  }
+
+  Future<void> loadCars() async {
+    List<Car> carsFromDB = await fetchCarsFromDatabase();
+    carsFromDB.forEach((car) => autoCenter.addCar(car));
+  }
+
+  void displayAllCars() {
+    print('All cars in the auto center:');
+    autoCenter.showAllCars();
+  }
+
+  void displayCarsByType(CarType type) {
+    print('\nFiltered cars by type (${Car.carTypeToString(type)}):');
+    var carsByType = autoCenter.findCarsByType(type);
+    carsByType.forEach((car) => car.displayInfo());
+  }
+
+  void displayCarsByPriceRange(double minPrice, double maxPrice) {
+    print('\nFiltered cars by price range (\$$minPrice - \$$maxPrice):');
+    var filteredCars = PriceFilter.filterByPrice(autoCenter.cars, minPrice, maxPrice);
+    filteredCars.forEach((car) => car.displayInfo());
+  }
+  void displayDetailedInfoForAllCars() {
+    print('\nDetailed Information for All Cars:');
+    autoCenter.cars.forEach((car) => print(car.detailedInfo)); // Использование метода расширения detailedInfo()
+  }
+}
+
+void main() async {
+  var app = ApplicationAuto();
+
+  await app.loadCars();
+
+  app.displayAllCars();
+
+  app.displayCarsByType(CarType.sedan);
+
+  app.displayCarsByPriceRange(20000, 40000);
+
+  app.displayDetailedInfoForAllCars();
+}

lib/main.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
 void main() {
-  runApp(const MyApp());
+  //runApp(const MyApp());
 }
 
 class MyApp extends StatelessWidget {