Initial commit

src/main/java/com/carService/demo/manager/CarManagerImpl.java

@@ -0,0 +1,43 @@
+package com.carService.demo.manager;
+
+import com.carService.demo.domain.Car;
+import com.carService.demo.domain.User;
+import com.carService.demo.repository.CarRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+@RequiredArgsConstructor
+public class CarManagerImpl implements CarManager {
+    private final CarRepository carRepository;
+
+    @Override
+    public Car createCar(Car car) {
+        return this.carRepository.save(car);
+    }
+
+    @Override
+    public List<Car> getAllCars() {
+        var cars = this.carRepository.findAll();
+        return cars;
+    }
+
+    @Override
+    public Optional<Car> getCarById(Long carId) {
+        return this.carRepository.findById(carId);
+    }
+    public List<Car> getCarsByUser(User user) {
+        return this.carRepository.findByUser(user);
+    }
+    public List<Car> getCarsByUserId(Long userId) {
+        return this.carRepository.findByUserId(userId);
+    }
+
+    @Override
+    public void deleteCarByID(Long carId) {
+        this.carRepository.deleteById(carId);
+    }
+}