Initial CLI Implementation

src/com/amigoscode/Main.java

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+package com.amigoscode;
+
+import com.amigoscode.booking.CarBooking;
+import com.amigoscode.booking.CarBookingService;
+import com.amigoscode.car.Car;
+import com.amigoscode.user.User;
+import com.amigoscode.user.UserService;
+
+import java.util.Scanner;
+import java.util.UUID;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        UserService userService = new UserService();
+        CarBookingService carBookingService = new CarBookingService();
+
+        Scanner scanner = new Scanner(System.in);
+
+        boolean keepLooping = true;
+
+        while (keepLooping) {
+            try {
+                displayMenu();
+                String choice = scanner.nextLine();
+                switch (Integer.parseInt(choice)) {
+                    case 1 -> bookCar(userService, carBookingService, scanner);
+                    case 2 -> displayAllUserBookedCars(userService, carBookingService, scanner);
+                    case 3 -> allBookings(carBookingService);
+                    case 4 -> displayAvailableCars(carBookingService, false);
+                    case 5 -> displayAvailableCars(carBookingService, true);
+                    case 6 -> displayAllUsers(userService);
+                    case 7 -> keepLooping = false;
+                    default -> System.out.println(choice + " not a valid option ❌");
+                }
+            } catch (Exception e) {
+                System.out.println(e.getMessage());
+            }
+        }
+    }
+
+    private static void allBookings(CarBookingService carBookingService) {
+        CarBooking[] bookings = carBookingService.getBookings();
+        if (bookings.length == 0) {
+            System.out.println("No bookings available 😕");
+            return;
+        }
+        for (CarBooking booking : bookings) {
+            System.out.println("booking = " + booking);
+        }
+    }
+
+    private static void displayAllUsers(UserService userService) {
+        User[] users = userService.getUsers();
+        if (users.length == 0) {
+            System.out.println("❌ No users in the system");
+            return;
+        }
+        for (User user : users) {
+            System.out.println(user);
+        }
+    }
+
+    private static void displayAvailableCars(CarBookingService carBookingService, boolean isElectric) {
+        Car[] availableCars = isElectric ? carBookingService.getAvailableElectricCars() : carBookingService.getAvailableCars();
+        if (availableCars.length == 0) {
+            System.out.println("❌ No cars available for renting");
+            return;
+        }
+        for (Car availableCar : availableCars) {
+            System.out.println(availableCar);
+        }
+    }
+
+    private static void displayAllUserBookedCars(UserService userService,
+                                                 CarBookingService carBookingService,
+                                                 Scanner scanner) {
+        displayAllUsers(userService);
+
+        System.out.println("➡️ select user id");
+        String userId = scanner.nextLine();
+
+        User user = userService.getUserById(UUID.fromString(userId));
+        if (user == null) {
+            System.out.println("❌ No user found with id " + userId);
+            return;
+        }
+
+        Car[] userBookedCars = carBookingService.getUserBookedCars(user.getId());
+        if (userBookedCars.length == 0) {
+            System.out.printf("❌ user %s has no cars booked", user);
+            return;
+        }
+        for (Car userBookedCar : userBookedCars) {
+            System.out.println(userBookedCar);
+        }
+    }
+
+    private static void bookCar(UserService userService, CarBookingService carBookingService, Scanner scanner) {
+        displayAvailableCars(carBookingService, false);
+
+        System.out.println("➡️ select car reg number");
+        String regNumber = scanner.nextLine();
+
+        displayAllUsers(userService);
+
+        System.out.println("➡️ select user id");
+        String userId = scanner.nextLine();
+
+        try {
+            User user = userService.getUserById(UUID.fromString(userId));
+            if (user == null) {
+                System.out.println("❌ No user found with id " + userId);
+            } else {
+                UUID bookingId = carBookingService.bookCar(user, regNumber);
+                String confirmationMessage = """
+                        🎉 Successfully booked car with reg number %s for user %s
+                        Booking ref: %s
+                        """.formatted(regNumber, user, bookingId);
+                System.out.println(confirmationMessage);
+            }
+
+        } catch (Exception e) {
+            System.out.println(e.getMessage());
+        }
+    }
+
+    private static void displayMenu() {
+        System.out.println("""
+                \n
+                1️⃣ - Book Car
+                2️⃣ - View All User Booked Cars
+                3️⃣ - View All Bookings
+                4️⃣ - View Available Cars
+                5️⃣ - View Available Electric Cars
+                6️⃣ - View all users
+                7️⃣ - Exit
+                """);
+    }
+
+}

src/com/amigoscode/booking/CarBooking.java

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+package com.amigoscode.booking;
+
+import com.amigoscode.car.Car;
+import com.amigoscode.user.User;
+
+import java.time.LocalDateTime;
+import java.util.Objects;
+import java.util.UUID;
+
+public class CarBooking {
+    private UUID bookingId;
+    private User user;
+    private Car car;
+    private LocalDateTime bookingTime;
+    private boolean isCanceled;
+
+    public CarBooking(UUID bookingId, User user, Car car, LocalDateTime bookingTime, boolean isCanceled) {
+        this.bookingId = bookingId;
+        this.user = user;
+        this.car = car;
+        this.bookingTime = bookingTime;
+        this.isCanceled = isCanceled;
+    }
+
+    public CarBooking(UUID bookingId, User user, Car car, LocalDateTime bookingTime) {
+        this(bookingId, user, car, bookingTime, false);
+    }
+
+    public UUID getBookingId() {
+        return bookingId;
+    }
+
+    public void setBookingId(UUID bookingId) {
+        this.bookingId = bookingId;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public Car getCar() {
+        return car;
+    }
+
+    public void setCar(Car car) {
+        this.car = car;
+    }
+
+    public LocalDateTime getBookingTime() {
+        return bookingTime;
+    }
+
+    public void setBookingTime(LocalDateTime bookingTime) {
+        this.bookingTime = bookingTime;
+    }
+
+    public boolean isCanceled() {
+        return isCanceled;
+    }
+
+    public void setCanceled(boolean canceled) {
+        isCanceled = canceled;
+    }
+
+    @Override
+    public String toString() {
+        return "CarBooking{" +
+                "bookingId=" + bookingId +
+                ", user=" + user +
+                ", car=" + car +
+                ", bookingTime=" + bookingTime +
+                ", isCanceled=" + isCanceled +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        CarBooking that = (CarBooking) o;
+        return isCanceled == that.isCanceled && Objects.equals(bookingId, that.bookingId) && Objects.equals(user, that.user) && Objects.equals(car, that.car) && Objects.equals(bookingTime, that.bookingTime);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(bookingId, user, car, bookingTime, isCanceled);
+    }
+}

src/com/amigoscode/booking/CarBookingDao.java

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+package com.amigoscode.booking;
+
+import java.util.UUID;
+
+public class CarBookingDao {
+
+    private final static CarBooking[] carBookings;
+
+    static {
+        carBookings = new CarBooking[10];
+    }
+
+    public CarBooking[] getCarBookings() {
+        return carBookings;
+    }
+
+    public void book(CarBooking carBooking) {
+        int nextFreeIndex = -1;
+
+        for (int i = 0; i < carBookings.length; i++) {
+            if (carBookings[i] == null) {
+                nextFreeIndex = i;
+            }
+        }
+
+        if (nextFreeIndex > -1) {
+            carBookings[nextFreeIndex] = carBooking;
+            return;
+        }
+
+        // full array
+        // copy all bookings to new array with bigger space
+        CarBooking[] biggerCarBookings = new CarBooking[carBookings.length + 10];
+
+        for (int i = 0; i < carBookings.length; i++) {
+            biggerCarBookings[i] = carBookings[i];
+        }
+
+        // finally add new booking
+        biggerCarBookings[carBookings.length] = carBooking;
+
+    }
+
+    public void cancelCarBooking(UUID id) {
+
+    }
+
+}