feat : implement restaurant management system

2026-06-25 22:55:13 +03:30
parent 00f990c653
commit 188d4f0b01
17 changed files with 980 additions and 229 deletions
@@ -1,26 +1,178 @@
 package dev.service;

+import dev.dao.MenuItemDao;
+import dev.dao.OrderDao;
+import dev.dao.OrderDetailDao;
+import dev.model.CartItem;
+import dev.model.MenuItem;
+import dev.model.Order;
+import dev.model.OrderDetail;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
 public class OrderService {

-    public void placeOrder(int userId) {
+    private final Scanner scanner =
+            new Scanner(System.in);

-        // TODO:
-        // Create order
+    private final MenuItemDao menuItemDao =
+            new MenuItemDao();

+    private final OrderDao orderDao =
+            new OrderDao();
+
+    private final OrderDetailDao orderDetailDao =
+            new OrderDetailDao();
+
+    public void placeOrder(int userId)
+    {
+        List<CartItem> cart = new ArrayList<>();
+
+        while (true)
+        {
+            System.out.println();
+            System.out.println("Available Items:");
+
+            List<MenuItem> items = menuItemDao.findAll();
+
+            for (MenuItem item : items)
+            {
+                System.out.printf(
+                        "%d - %s - $%.2f%n",
+                        item.getId(),
+                        item.getName(),
+                        item.getPrice()
+                );
+            }
+
+            System.out.print("Enter item id (0 to finish): ");
+
+            int itemId = scanner.nextInt();
+
+            if (itemId == 0)
+                break;
+
+            MenuItem menuItem = menuItemDao.findById(itemId);
+
+            if (menuItem == null)
+            {
+                System.out.println("Invalid item id.");
+                continue;
+            }
+
+            System.out.print("Quantity: ");
+
+            int quantity = scanner.nextInt();
+
+            if (quantity <= 0)
+            {
+                System.out.println("Quantity must be positive.");
+                continue;
+            }
+
+            cart.add(new CartItem(menuItem, quantity));
+
+            System.out.println("Added successfully.");
+        }
+
+        if (cart.isEmpty())
+        {
+            System.out.println("No items selected.");
+            return;
+        }
+
+        double total = 0.0;
+
+        for (CartItem cartItem : cart)
+            total += cartItem.getMenuItem().getPrice() * cartItem.getQuantity();
+
+        Order order = new Order();
+
+        order.setUserId(userId);
+        order.setCreatedAt(LocalDateTime.now());
+        order.setTotalPrice(total);
+
+        int orderId = orderDao.save(order);
+
+        if (orderId == -1)
+        {
+            System.out.println("Failed to save order.");
+            return;
+        }
+
+        for (CartItem cartItem : cart)
+        {
+            OrderDetail detail = new OrderDetail();
+            detail.setOrderId(orderId);
+            detail.setMenuItemId(cartItem.getMenuItem().getId());
+            detail.setQuantity(cartItem.getQuantity());
+            detail.setPrice(cartItem.getMenuItem().getPrice());
+
+            orderDetailDao.save(detail);
+        }
+
+        System.out.println();
+        System.out.println("Order saved successfully.");
+
+        printReceipt(orderId);
    }

-    public void printReceipt(int orderId) {
+    public void printReceipt(int orderId)
+    {
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);

-        // TODO:
-        // Print order receipt
+        System.out.println();
+        System.out.println("========== RECEIPT ==========");
+        System.out.printf("%-15s %-8s %-10s %-10s%n", "Item", "Qty", "Unit", "Total");
+        System.out.println("------------------------------------------");

+        double grandTotal = 0;
+
+        for (OrderDetail detail : details)
+        {
+            MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+            double subtotal = detail.getQuantity() * detail.getPrice();
+
+            grandTotal += subtotal;
+
+            System.out.printf(
+                    "%-15s %-8d %-10.2f %-10.2f%n",
+                    item.getName(),
+                    detail.getQuantity(),
+                    detail.getPrice(),
+                    subtotal
+            );
+        }
+
+        System.out.println("------------------------------------------");
+        System.out.printf("Final Total: %.2f%n", grandTotal);
+        System.out.println("==============================");
    }

-    public void showOrderHistory(int userId) {
+    public void showOrderHistory(int userId)
+    {
+        List<Order> orders = orderDao.findByUserId(userId);

-        // TODO:
-        // Display user's order history
+        if (orders.isEmpty())
+        {
+            System.out.println("No orders found.");
+            return;
+        }

+        System.out.println();
+        System.out.println("====== ORDER HISTORY ======");
+
+        for (Order order : orders)
+        {
+            System.out.printf(
+                    "Order #%d | %s | $%.2f%n",
+                    order.getId(),
+                    order.getCreatedAt(),
+                    order.getTotalPrice()
+            );
+        }
    }
-
 }