Merge pull request 'Develop' (#1) from develop into main

Reviewed-on: #1

.idea/.gitignore

@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/compiler.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="WS-10-Database" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="SqlNoDataSourceInspection" enabled="false" level="WARNING" enabled_by_default="false" />
+  </profile>
+</component>

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://mirror-maven.runflare.com/maven2" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="25" project-jdk-type="JavaSDK" />
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

database.sql

@@ -1,141 +1,52 @@
--- Restaurant Database Management System
+
---
+
--- Instructions:
+CREATE TABLE users(
--- 1. Create all required tables.
+      id SERIAL PRIMARY KEY,
--- 2. Design appropriate PRIMARY KEY and FOREIGN KEY relationships.
+      username VARCHAR(50) NOT NULL UNIQUE,
--- 3. Add suitable constraints based on the requirements.
+      password VARCHAR(100) NOT NULL,
--- 4. Insert initial mock data.
+      email VARCHAR(100)
--- 5. Insert at least 3 menu items.
+);
--- 6. The script should be executable from start to finish without errors.
 
 
 
--- =======================================================
+CREATE TABLE menu_items (
--- USER TABLE
+     id SERIAL PRIMARY KEY,
--- =======================================================
+     name VARCHAR(100) NOT NULL,
---
+     description TEXT,
--- Represents customers using the system.
+     price NUMERIC(10, 2) NOT NULL CHECK (price > 0),
---
+     category VARCHAR(50)
--- Required information:
+);
--- - Unique identifier
+
--- - Username
+
--- - Password
+CREATE TABLE orders (
--- - Email (optional)
+     id SERIAL PRIMARY KEY,
---
+     user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
--- Requirements:
+     created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
--- - Each user must have a unique identifier.
+     total_price NUMERIC(10, 2) NOT NULL CHECK (total_price >= 0)
--- - Usernames must be unique.
+);
--- - Username and password are required.
--- - Passwords should not be stored in plain text.
---
--- CREATE TABLE ...
 
 
 
--- =======================================================
+CREATE TABLE order_details (
--- MENU ITEM TABLE
+     id SERIAL PRIMARY KEY,
--- =======================================================
+     order_id INTEGER NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
---
+     menu_item_id INTEGER NOT NULL REFERENCES menu_items(id),
--- Represents available food and drink items.
+     quantity INTEGER NOT NULL CHECK (quantity > 0),
---
+     price NUMERIC(10, 2) NOT NULL CHECK (price > 0)
--- Required information:
+);
--- - Unique identifier
+
--- - Name
+
--- - Description (optional)
+INSERT INTO menu_items (name, description, price, category)
--- - Price
+VALUES
--- - Category (optional)
+    ('Pizza', 'Cheese pizza with tomato sauce', 12.50, 'Pizza'),
---
+    ('Burger', 'Beef burger with fries', 9.00, 'Burger'),
--- Requirements:
+    ('Pasta', 'Pasta with Alfredo sauce', 11.00, 'Pasta'),
--- - Each menu item must have a unique identifier.
+    ('Cola', 'Cold soft drink', 2.50, 'Drink');
--- - Name is required.
+
--- - Price must always be positive.
+SELECT * FROM users;
---
+SELECT * FROM menu_items;
--- CREATE TABLE ...
+SELECT * FROM orders;
+SELECT * FROM order_details;
 
 
 
--- =======================================================
--- ORDER TABLE
--- =======================================================
---
--- Represents orders placed by customers.
---
--- Required information:
--- - Unique identifier
--- - Reference to customer
--- - Creation date and time
--- - Total price
---
--- Requirements:
--- - Each order must belong to exactly one user.
--- - A user can have multiple orders.
--- - The relationship between User and Order must be implemented.
---
--- Note:
--- Avoid using reserved SQL keywords as table names.
--- Consider using a name such as "orders" or "customer_orders".
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- ORDER DETAIL TABLE
--- =======================================================
---
--- Represents items inside an order.
---
--- Required information:
--- - Unique identifier
--- - Reference to an order
--- - Reference to a menu item
--- - Quantity
--- - Item price at purchase time
---
--- Requirements:
--- - Each detail record must belong to one order.
--- - Each detail record must reference one menu item.
--- - Quantity must always be greater than zero.
--- - Store the item's price at the moment of purchase.
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- INITIAL MENU DATA
--- =======================================================
---
--- Insert at least 3 food or drink items.
---
--- Example categories:
--- - Pizza
--- - Burger
--- - Pasta
--- - Drink
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- OPTIONAL TEST DATA
--- =======================================================
---
--- You may insert sample users and orders for testing.
--- This section is optional.
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- VERIFICATION QUERIES
--- =======================================================
---
--- Uncomment these queries to verify your database.
---
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;

src/main/java/dev/dao/MenuItemDao.java

@@ -1,23 +1,82 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.MenuItem;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.List;
 
 public class MenuItemDao {
 
     public List<MenuItem> findAll() {
 
-        // TODO:
+        String sql = "SELECT id, name, description, price, category FROM menu_items";
-        // Retrieve all menu items
 
-        return null;
+        List<MenuItem> menuItems = new ArrayList<>();
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql);
+                ResultSet resultSet = statement.executeQuery()
+        ) {
+
+            while (resultSet.next()) {
+
+                MenuItem menuItem = new MenuItem();
+
+                menuItem.setId(resultSet.getInt("id"));
+                menuItem.setName(resultSet.getString("name"));
+                menuItem.setDescription(resultSet.getString("description"));
+                menuItem.setPrice(resultSet.getDouble("price"));
+                menuItem.setCategory(resultSet.getString("category"));
+
+                menuItems.add(menuItem);
+            }
+
+        } catch (SQLException e) {
+
+            System.out.println("Error loading menu items: " + e.getMessage());
+
+        }
+
+        return menuItems;
     }
 
     public MenuItem findById(int id) {
 
-        // TODO:
+        String sql = "SELECT id, name, description, price, category FROM menu_items WHERE id = ?";
-        // Find menu item by id
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, id);
+
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+
+                MenuItem menuItem = new MenuItem();
+
+                menuItem.setId(resultSet.getInt("id"));
+                menuItem.setName(resultSet.getString("name"));
+                menuItem.setDescription(resultSet.getString("description"));
+                menuItem.setPrice(resultSet.getDouble("price"));
+                menuItem.setCategory(resultSet.getString("category"));
+
+                return menuItem;
+            }
+
+        } catch (SQLException e) {
+
+            System.out.println("Error finding menu item: " + e.getMessage());
+
+        }
 
         return null;
     }

src/main/java/dev/dao/OrderDao.java

@@ -1,25 +1,70 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.Order;
 
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDao {
 
     public int save(Order order) {
 
-        // TODO:
+        String sql = "INSERT INTO orders (user_id, total_price) VALUES (?, ?) RETURNING id";
-        // Insert order and return generated id
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, order.getUserId());
+            statement.setDouble(2, order.getTotalPrice());
+
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+                return resultSet.getInt("id");
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error saving order: " + e.getMessage());
+        }
 
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
 
-        // TODO:
+        String sql = "SELECT id, user_id, created_at, total_price FROM orders WHERE user_id = ?";
-        // Retrieve all orders of a user
 
-        return null;
+        List<Order> orders = new ArrayList<>();
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, userId);
+
+            ResultSet resultSet = statement.executeQuery();
+
+            while (resultSet.next()) {
+
+                Order order = new Order();
+
+                order.setId(resultSet.getInt("id"));
+                order.setUserId(resultSet.getInt("user_id"));
+                order.setCreatedAt(resultSet.getTimestamp("created_at").toLocalDateTime());
+                order.setTotalPrice(resultSet.getDouble("total_price"));
+
+                orders.add(order);
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error loading orders: " + e.getMessage());
+        }
+
+        return orders;
     }
-
 }

src/main/java/dev/dao/OrderDetailDao.java

@@ -1,24 +1,74 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.OrderDetail;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDetailDao {
 
     public void save(OrderDetail detail) {
 
-        // TODO:
+        String sql = "INSERT INTO order_details (order_id, menu_item_id, quantity, price) VALUES (?, ?, ?, ?)";
-        // Insert order detail
 
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, detail.getOrderId());
+            statement.setInt(2, detail.getMenuItemId());
+            statement.setInt(3, detail.getQuantity());
+            statement.setDouble(4, detail.getPrice());
+
+            statement.executeUpdate();
+
+        } catch (SQLException e) {
+
+            System.out.println("Error saving order detail: " + e.getMessage());
+
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
 
-        // TODO:
+        String sql = "SELECT id, order_id, menu_item_id, quantity, price FROM order_details WHERE order_id = ?";
-        // Retrieve order details
 
-        return null;
+        List<OrderDetail> details = new ArrayList<>();
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, orderId);
+
+            ResultSet resultSet = statement.executeQuery();
+
+            while (resultSet.next()) {
+
+                OrderDetail detail = new OrderDetail();
+
+                detail.setId(resultSet.getInt("id"));
+                detail.setOrderId(resultSet.getInt("order_id"));
+                detail.setMenuItemId(resultSet.getInt("menu_item_id"));
+                detail.setQuantity(resultSet.getInt("quantity"));
+                detail.setPrice(resultSet.getDouble("price"));
+
+                details.add(detail);
+            }
+
+        } catch (SQLException e) {
+
+            System.out.println("Error loading order details: " + e.getMessage());
+
+        }
+
+        return details;
     }
-
 }

src/main/java/dev/dao/UserDao.java

@@ -1,21 +1,71 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.User;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
 public class UserDao {
 
     public boolean save(User user) {
 
-        // TODO:
+        String sql = "INSERT INTO users (username, password, email) VALUES (?, ?, ?)";
-        // Insert user into database
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setString(1, user.getUsername());
+            statement.setString(2, user.getPassword());
+            statement.setString(3, user.getEmail());
+
+            int rows = statement.executeUpdate();
+
+            return rows > 0;
+
+        } catch (SQLException e) {
+
+            System.out.println("Error saving user: " + e.getMessage());
+            return false;
+
+        }
 
-        return false;
     }
 
     public User findByUsername(String username) {
 
-        // TODO:
+        String sql = "SELECT id, username, password, email FROM users WHERE username = ?";
-        // Find a user by username
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setString(1, username);
+
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+
+                User user = new User();
+
+                user.setId(resultSet.getInt("id"));
+                user.setUsername(resultSet.getString("username"));
+                user.setPassword(resultSet.getString("password"));
+                user.setEmail(resultSet.getString("email"));
+
+                return user;
+            }
+
+        } catch (SQLException e) {
+
+            System.out.println("Error finding user: " + e.getMessage());
+
+        }
 
         return null;
     }

src/main/java/dev/database/DatabaseConnection.java

@@ -1,15 +1,16 @@
 package dev.database;
 
 import java.sql.Connection;
+import java.sql.DriverManager;
 import java.sql.SQLException;
 
 public class DatabaseConnection {
 
-    private static final String URL = "jdbc:postgresql://localhost:5432/restaurant_db"; // DB Server
+    private static final String URL = "jdbc:postgresql://localhost:5432/postgres"; // DB Server
 
     private static final String USER = "postgres"; // Your Username
 
-    private static final String PASSWORD = "password"; // Your Password
+    private static final String PASSWORD = "1234"; // Your Password
 
     private DatabaseConnection() {
 
@@ -18,10 +19,9 @@ public class DatabaseConnection {
     public static Connection getConnection()
             throws SQLException {
 
-        // TODO:
+        return DriverManager.getConnection(URL, USER, PASSWORD);
-        // Return a valid PostgreSQL connection
+
 
-        return null;
     }
 
 }

src/main/java/dev/model/MenuItem.java

@@ -3,13 +3,48 @@ package dev.model;
 public class MenuItem {
 
     private int id;
-
     private String name;
-
     private String description;
-
     private double price;
-
     private String category;
 
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
 }

src/main/java/dev/model/Order.java

@@ -12,4 +12,35 @@ public class Order {
 
     private double totalPrice;
 
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public int getUserId() {
+        return userId;
+    }
+
+    public void setUserId(int userId) {
+        this.userId = userId;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public double getTotalPrice() {
+        return totalPrice;
+    }
+
+    public void setTotalPrice(double totalPrice) {
+        this.totalPrice = totalPrice;
+    }
 }

src/main/java/dev/model/OrderDetail.java

@@ -12,4 +12,43 @@ public class OrderDetail {
 
     private double price;
 
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public int getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(int orderId) {
+        this.orderId = orderId;
+    }
+
+    public int getMenuItemId() {
+        return menuItemId;
+    }
+
+    public void setMenuItemId(int menuItemId) {
+        this.menuItemId = menuItemId;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
 }

src/main/java/dev/model/User.java

@@ -10,4 +10,35 @@ public class User {
 
     private String email;
 
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
 }

src/main/java/dev/service/AuthService.java

@@ -1,21 +1,48 @@
 package dev.service;
 
+import dev.dao.UserDao;
 import dev.model.User;
 
 public class AuthService {
 
+    private UserDao userDao = new UserDao();
+
     public boolean register(String username, String password, String email) {
 
-        // TODO:
+        if (username == null || username.isBlank()) {
-        // Validate and register user
+            return false;
+        }
 
-        return false;
+        if (password == null || password.isBlank()) {
+            return false;
+        }
+
+        User existingUser = userDao.findByUsername(username);
+
+        if (existingUser != null) {
+            return false;
+        }
+
+        User user = new User();
+
+        user.setUsername(username);
+        user.setPassword(password);
+        user.setEmail(email);
+
+        return userDao.save(user);
     }
 
     public User login(String username, String password) {
 
-        // TODO:
+        User user = userDao.findByUsername(username);
-        // Authenticate user
+
+        if (user == null) {
+            return null;
+        }
+
+        if (user.getPassword().equals(password)) {
+            return user;
+        }
 
         return null;
     }

src/main/java/dev/service/MenuService.java

@@ -1,12 +1,33 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.model.MenuItem;
+
+import java.util.List;
+
 public class MenuService {
 
+    private MenuItemDao menuItemDao = new MenuItemDao();
+
     public void showMenu() {
 
-        // TODO:
+        List<MenuItem> menuItems = menuItemDao.findAll();
-        // Display menu items
 
+        if (menuItems.isEmpty()) {
+            System.out.println("Menu is empty.");
+            return;
+        }
+
+        System.out.println("===== MENU =====");
+
+        for (MenuItem item : menuItems) {
+            System.out.println(
+                    item.getId() + ". " +
+                            item.getName() + " - " +
+                            item.getDescription() + " - $" +
+                            item.getPrice() + " - " +
+                            item.getCategory()
+            );
+        }
     }
-
 }

src/main/java/dev/service/OrderService.java

@@ -1,26 +1,141 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.dao.OrderDao;
+import dev.dao.OrderDetailDao;
+import dev.model.MenuItem;
+import dev.model.Order;
+import dev.model.OrderDetail;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
 public class OrderService {
 
+    private final Scanner scanner = new Scanner(System.in);
+
+    private final MenuItemDao menuItemDao = new MenuItemDao();
+    private final OrderDao orderDao = new OrderDao();
+    private final OrderDetailDao orderDetailDao = new OrderDetailDao();
+
     public void placeOrder(int userId) {
 
-        // TODO:
+        List<OrderDetail> cart = new ArrayList<>();
-        // Create order
+        double totalPrice = 0;
 
+        while (true) {
+
+            System.out.print("Enter item id or 0 to finish: ");
+            int itemId = scanner.nextInt();
+
+            if (itemId == 0) {
+                break;
+            }
+
+            MenuItem menuItem = menuItemDao.findById(itemId);
+
+            if (menuItem == null) {
+                System.out.println("Item not found.");
+                continue;
+            }
+
+            System.out.print("Enter quantity: ");
+            int quantity = scanner.nextInt();
+
+            if (quantity <= 0) {
+                System.out.println("Quantity must be greater than 0.");
+                continue;
+            }
+
+            OrderDetail detail = new OrderDetail();
+            detail.setMenuItemId(menuItem.getId());
+            detail.setQuantity(quantity);
+            detail.setPrice(menuItem.getPrice());
+
+            cart.add(detail);
+
+            totalPrice += menuItem.getPrice() * quantity;
+
+            System.out.println("Added " + quantity + "x " + menuItem.getName());
+        }
+
+        if (cart.isEmpty()) {
+            System.out.println("Order cancelled.");
+            return;
+        }
+
+        Order order = new Order();
+        order.setUserId(userId);
+        order.setTotalPrice(totalPrice);
+
+        int orderId = orderDao.save(order);
+
+        if (orderId == -1) {
+            System.out.println("Order could not be saved.");
+            return;
+        }
+
+        for (OrderDetail detail : cart) {
+            detail.setOrderId(orderId);
+            orderDetailDao.save(detail);
+        }
+
+        System.out.println("Order saved successfully.");
+        printReceipt(orderId);
     }
 
     public void printReceipt(int orderId) {
 
-        // TODO:
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);
-        // Print order receipt
 
+        if (details.isEmpty()) {
+            System.out.println("No details found for this order.");
+            return;
+        }
+
+        double finalTotal = 0;
+
+        System.out.println();
+        System.out.println("===== RECEIPT =====");
+
+        for (OrderDetail detail : details) {
+
+            MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+
+            double subtotal = detail.getPrice() * detail.getQuantity();
+            finalTotal += subtotal;
+
+            System.out.println(
+                    item.getName() +
+                            " | Qty: " + detail.getQuantity() +
+                            " | Unit: $" + detail.getPrice() +
+                            " | Total: $" + subtotal
+            );
+        }
+
+        System.out.println("-------------------");
+        System.out.println("Final Total: $" + finalTotal);
     }
 
     public void showOrderHistory(int userId) {
 
-        // TODO:
+        List<Order> orders = orderDao.findByUserId(userId);
-        // 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.println(
+                    "Order #" + order.getId() +
+                            " | Date: " + order.getCreatedAt() +
+                            " | Total: $" + order.getTotalPrice()
+            );
+        }
     }
-
 }

src/main/java/dev/ui/ConsoleMenu.java

@@ -1,44 +1,117 @@
 package dev.ui;
 
+import dev.model.User;
+import dev.service.AuthService;
+import dev.service.MenuService;
+import dev.service.OrderService;
+
 import java.util.Scanner;
 
 public class ConsoleMenu {
 
-    private final Scanner scanner =
+    private final Scanner scanner = new Scanner(System.in);
-            new Scanner(System.in);
+
+    private final AuthService authService = new AuthService();
+
+    private final MenuService menuService = new MenuService();
+
+    private final OrderService orderService = new OrderService();
 
     public void start() {
 
         while (true) {
 
             System.out.println();
-            System.out.println("===== JAVA PIZZERIA =====");
+            System.out.println("===== RESTAURANT SYSTEM =====");
-            System.out.println("1. Login");
+            System.out.println("1. Register");
-            System.out.println("2. Register");
+            System.out.println("2. Login");
-            System.out.println("3. Exit");
+            System.out.println("0. Exit");
+            System.out.print("Choose: ");
 
             int choice = scanner.nextInt();
+            scanner.nextLine();
 
-            switch (choice) {
+            if (choice == 1) {
-
+                register();
-                case 1:
+            } else if (choice == 2) {
-                    // TODO
+                login();
-                    break;
+            } else if (choice == 0) {
-
+                System.out.println("Goodbye!");
-                case 2:
+                return;
-                    // TODO
+            } else {
-                    break;
+                System.out.println("Invalid choice.");
-
-                case 3:
-                    return;
-
-                default:
-                    System.out.println("Invalid choice");
-
             }
-
         }
-
     }
 
+    private void register() {
+
+        System.out.print("Username: ");
+        String username = scanner.nextLine();
+
+        System.out.print("Password: ");
+        String password = scanner.nextLine();
+
+        System.out.print("Email: ");
+        String email = scanner.nextLine();
+
+        boolean success = authService.register(username, password, email);
+
+        if (success) {
+            System.out.println("Registration successful.");
+        } else {
+            System.out.println("Registration failed.");
+        }
+    }
+
+    private void login() {
+
+        System.out.print("Username: ");
+        String username = scanner.nextLine();
+
+        System.out.print("Password: ");
+        String password = scanner.nextLine();
+
+        User user = authService.login(username, password);
+
+        if (user == null) {
+            System.out.println("Invalid username or password.");
+            return;
+        }
+
+        System.out.println("Login successful. Welcome " + user.getUsername());
+
+        userMenu(user);
+    }
+
+    private void userMenu(User user) {
+
+        while (true) {
+
+            System.out.println();
+            System.out.println("===== USER MENU =====");
+            System.out.println("1. View Menu");
+            System.out.println("2. Place Order");
+            System.out.println("3. Order History");
+            System.out.println("0. Logout");
+            System.out.print("Choose: ");
+
+            int choice = scanner.nextInt();
+            scanner.nextLine();
+
+            if (choice == 1) {
+                menuService.showMenu();
+            } else if (choice == 2) {
+                menuService.showMenu();
+                orderService.placeOrder(user.getId());
+            } else if (choice == 3) {
+                orderService.showOrderHistory(user.getId());
+            } else if (choice == 0) {
+                System.out.println("Logged out.");
+                return;
+            } else {
+                System.out.println("Invalid choice.");
+            }
+        }
+    }
 }