WS-10 is complete

.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/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="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <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>
+  </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 +1,54 @@
--- Restaurant Database Management System
---
--- Instructions:
--- 1. Create all required tables.
--- 2. Design appropriate PRIMARY KEY and FOREIGN KEY relationships.
--- 3. Add suitable constraints based on the requirements.
--- 4. Insert initial mock data.
--- 5. Insert at least 3 menu items.
--- 6. The script should be executable from start to finish without errors.
-
-
-
 -- =======================================================
 -- USER TABLE
 -- =======================================================
---
--- Represents customers using the system.
---
--- Required information:
--- - Unique identifier
--- - Username
--- - Password
--- - Email (optional)
---
--- Requirements:
--- - Each user must have a unique identifier.
--- - Usernames must be unique.
--- - Username and password are required.
--- - Passwords should not be stored in plain text.
---
--- CREATE TABLE ...
-
-
+CREATE TABLE IF NOT EXISTS users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(50) NOT NULL UNIQUE,
+    password VARCHAR(256) NOT NULL,
+    email VARCHAR(100)
+);
 
 -- =======================================================
 -- MENU ITEM TABLE
 -- =======================================================
---
--- Represents available food and drink items.
---
--- Required information:
--- - Unique identifier
--- - Name
--- - Description (optional)
--- - Price
--- - Category (optional)
---
--- Requirements:
--- - Each menu item must have a unique identifier.
--- - Name is required.
--- - Price must always be positive.
---
--- CREATE TABLE ...
-
-
+CREATE TABLE IF NOT EXISTS menu_items (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(100) NOT NULL,
+    description TEXT,
+    price DECIMAL(10, 2) NOT NULL CHECK (price > 0),
+    category VARCHAR(50)
+);
 
 -- =======================================================
 -- 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 ...
-
-
+CREATE TABLE IF NOT EXISTS orders (
+    id SERIAL PRIMARY KEY,
+    user_id INT NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    total_price DECIMAL(10, 2) NOT NULL CHECK (total_price >= 0),
+    CONSTRAINT fk_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
 
 -- =======================================================
 -- 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 ...
-
-
+CREATE TABLE IF NOT EXISTS order_details (
+    id SERIAL PRIMARY KEY,
+    order_id INT NOT NULL,
+    menu_item_id INT NOT NULL,
+    quantity INT NOT NULL CHECK (quantity > 0),
+    price DECIMAL(10, 2) NOT NULL CHECK (price >= 0),
+    CONSTRAINT fk_order FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE CASCADE,
+    CONSTRAINT fk_menu_item FOREIGN KEY (menu_item_id) REFERENCES menu_items(id) ON DELETE RESTRICT
+);
 
 -- =======================================================
 -- 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 ...;
+INSERT INTO menu_items (name, description, price, category) VALUES
+('Margherita Pizza', 'Classic tomato sauce, fresh mozzarella, and basil', 10.00, 'Pizza'),
+('Cheeseburger', 'Beef patty, cheddar cheese, lettuce, tomato, and burger sauce', 8.00, 'Burger'),
+('Fettuccine Alfredo', 'Rich and creamy parmesan sauce over pasta', 12.00, 'Pasta'),
+('Coca Cola', 'Chilled carbonated soft drink', 2.50, 'Drink')
+ON CONFLICT DO NOTHING;

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

@@ -1,25 +1,53 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.MenuItem;
-
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
 public class MenuItemDao {
 
     public List<MenuItem> findAll() {
-
-        // TODO:
-        // Retrieve all menu items
-
-        return null;
+        List<MenuItem> items = new ArrayList<>();
+        String sql = "SELECT * FROM menu_items ORDER BY id";
+        try (Connection conn = DatabaseConnection.getConnection();
+             Statement stmt = conn.createStatement();
+             ResultSet rs = stmt.executeQuery(sql)) {
+            while (rs.next()) {
+                items.add(new MenuItem(
+                        rs.getInt("id"),
+                        rs.getString("name"),
+                        rs.getString("description"),
+                        rs.getDouble("price"),
+                        rs.getString("category")
+                ));
+            }
+        } catch (SQLException e) {
+            System.err.println("Database error while fetching menu items: " + e.getMessage());
+        }
+        return items;
     }
 
     public MenuItem findById(int id) {
-
-        // TODO:
-        // Find menu item by id
-
+        String sql = "SELECT * FROM menu_items WHERE id = ?";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setInt(1, id);
+            try (ResultSet rs = stmt.executeQuery()) {
+                if (rs.next()) {
+                    return new MenuItem(
+                            rs.getInt("id"),
+                            rs.getString("name"),
+                            rs.getString("description"),
+                            rs.getDouble("price"),
+                            rs.getString("category")
+                    );
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Database error while finding menu item: " + e.getMessage());
+        }
         return null;
     }
-
 }

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

@@ -1,25 +1,52 @@
 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:
-        // Insert order and return generated id
+        String sql = "INSERT INTO orders (user_id, total_price) VALUES (?, ?)";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS)) {
+            stmt.setInt(1, order.getUserId());
+            stmt.setDouble(2, order.getTotalPrice());
+            stmt.executeUpdate();
 
+            try (ResultSet generatedKeys = stmt.getGeneratedKeys()) {
+                if (generatedKeys.next()) {
+                    return generatedKeys.getInt(1);
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Database error while saving order: " + e.getMessage());
+        }
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
-
-        // TODO:
-        // Retrieve all orders of a user
-
-        return null;
+        List<Order> orders = new ArrayList<>();
+        String sql = "SELECT * FROM orders WHERE user_id = ? ORDER BY created_at DESC";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setInt(1, userId);
+            try (ResultSet rs = stmt.executeQuery()) {
+                while (rs.next()) {
+                    orders.add(new Order(
+                            rs.getInt("id"),
+                            rs.getInt("user_id"),
+                            rs.getTimestamp("created_at").toLocalDateTime(),
+                            rs.getDouble("total_price")
+                    ));
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Database error while searching history: " + e.getMessage());
+        }
+        return orders;
     }
-
 }

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

@@ -1,24 +1,47 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.OrderDetail;
-
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDetailDao {
 
     public void save(OrderDetail detail) {
-
-        // TODO:
-        // Insert order detail
-
+        String sql = "INSERT INTO order_details (order_id, menu_item_id, quantity, price) VALUES (?, ?, ?, ?)";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setInt(1, detail.getOrderId());
+            stmt.setInt(2, detail.getMenuItemId());
+            stmt.setInt(3, detail.getQuantity());
+            stmt.setDouble(4, detail.getPrice());
+            stmt.executeUpdate();
+        } catch (SQLException e) {
+            System.err.println("Database error while saving order details: " + e.getMessage());
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
-
-        // TODO:
-        // Retrieve order details
-
-        return null;
+        List<OrderDetail> details = new ArrayList<>();
+        String sql = "SELECT * FROM order_details WHERE order_id = ?";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setInt(1, orderId);
+            try (ResultSet rs = stmt.executeQuery()) {
+                while (rs.next()) {
+                    details.add(new OrderDetail(
+                            rs.getInt("id"),
+                            rs.getInt("order_id"),
+                            rs.getInt("menu_item_id"),
+                            rs.getInt("quantity"), // <-- Use rs.getInt("quantity") here
+                            rs.getDouble("price")
+                    ));
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Database error retrieving order details: " + e.getMessage());
+        }
+        return details;
     }
-
 }

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

@@ -1,23 +1,43 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.User;
+import java.sql.*;
 
 public class UserDao {
 
     public boolean save(User user) {
-
-        // TODO:
-        // Insert user into database
-
-        return false;
+        String sql = "INSERT INTO users (username, password, email) VALUES (?, ?, ?)";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setString(1, user.getUsername());
+            stmt.setString(2, user.getPassword());
+            stmt.setString(3, user.getEmail());
+            return stmt.executeUpdate() > 0;
+        } catch (SQLException e) {
+            System.err.println("Database error while registering: " + e.getMessage());
+            return false;
+        }
     }
 
     public User findByUsername(String username) {
-
-        // TODO:
-        // Find a user by username
-
+        String sql = "SELECT * FROM users WHERE username = ?";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setString(1, username);
+            try (ResultSet rs = stmt.executeQuery()) {
+                if (rs.next()) {
+                    return new User(
+                            rs.getInt("id"),
+                            rs.getString("username"),
+                            rs.getString("password"),
+                            rs.getString("email")
+                    );
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Database error while finding user: " + e.getMessage());
+        }
         return null;
     }
-
 }

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

@@ -1,27 +1,19 @@
 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 USER = "postgres"; // Your Username
-
-    private static final String PASSWORD = "password"; // Your Password
+    private static final String URL = "jdbc:postgresql://localhost:5432/restaurant_db";
+    private static final String USER = "postgres";
+    private static final String PASSWORD = "2357";
 
     private DatabaseConnection() {
-
     }
 
-    public static Connection getConnection()
-            throws SQLException {
-
-        // TODO:
-        // Return a valid PostgreSQL connection
-
-        return null;
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(URL, USER, PASSWORD);
     }
-
 }

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

@@ -1,15 +1,30 @@
 package dev.model;
 
 public class MenuItem {
-
     private int id;
-
     private String name;
-
     private String description;
-
     private double price;
-
     private String category;
 
+    public MenuItem() {}
+
+    public MenuItem(int id, String name, String description, double price, String category) {
+        this.id = id;
+        this.name = name;
+        this.description = description;
+        this.price = price;
+        this.category = 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

@@ -5,11 +5,24 @@ import java.time.LocalDateTime;
 public class Order {
 
     private int id;
-
     private int userId;
-
     private LocalDateTime createdAt;
-
     private double totalPrice;
 
+    public Order() {}
+
+    public Order(int id, int userId, LocalDateTime createdAt, double totalPrice) {
+        this.id = id;
+        this.userId = userId;
+        this.createdAt = createdAt;
+        this.totalPrice = 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

@@ -1,15 +1,30 @@
 package dev.model;
 
 public class OrderDetail {
-
     private int id;
-
     private int orderId;
-
     private int menuItemId;
-
     private int quantity;
-
     private double price;
 
+    public OrderDetail() {}
+
+    public OrderDetail(int id, int orderId, int menuItemId, int quantity, double price) {
+        this.id = id;
+        this.orderId = orderId;
+        this.menuItemId = menuItemId;
+        this.quantity = quantity;
+        this.price = 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

@@ -1,13 +1,26 @@
 package dev.model;
 
 public class User {
-
     private int id;
-
     private String username;
-
     private String password;
-
     private String email;
 
+    public User() {}
+
+    public User(int id, String username, String password, String email) {
+        this.id = id;
+        this.username = username;
+        this.password = password;
+        this.email = 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

@@ -1,23 +1,47 @@
 package dev.service;
 
+import dev.dao.UserDao;
 import dev.model.User;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 
 public class AuthService {
-
+    private final UserDao userDao = new UserDao();
     public boolean register(String username, String password, String email) {
-
-        // TODO:
-        // Validate and register user
-
-        return false;
+        if (username == null || username.trim().isEmpty() || password == null || password.trim().isEmpty()) {
+            return false;
+        }
+        if (userDao.findByUsername(username) != null) {
+            System.out.println("Username already exists!");
+            return false;
+        }
+        String hashedPassword = hashPassword(password);
+        User user = new User(0, username, hashedPassword, email);
+        return userDao.save(user);
     }
 
     public User login(String username, String password) {
-
-        // TODO:
-        // Authenticate user
-
+        User user = userDao.findByUsername(username);
+        if (user != null && user.getPassword().equals(hashPassword(password))) {
+            return user;
+        }
         return null;
     }
 
+    private String hashPassword(String password) {
+        try {
+            MessageDigest digest = MessageDigest.getInstance("SHA-256");
+            byte[] encodedhash = digest.digest(password.getBytes());
+            StringBuilder hexString = new StringBuilder();
+            for (byte b : encodedhash) {
+                String hex = Integer.toHexString(0xff & b);
+                if (hex.length() == 1) hexString.append('0');
+                hexString.append(hex);
+            }
+            return hexString.toString();
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("Error securely processing password.", e);
+        }
+    }
+
 }

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

@@ -1,12 +1,22 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.model.MenuItem;
+import java.util.List;
+
 public class MenuService {
 
+    private final MenuItemDao menuItemDao = new MenuItemDao();
+
     public void showMenu() {
-
-        // TODO:
-        // Display menu items
-
+        List<MenuItem> items = menuItemDao.findAll();
+        System.out.println("\n--- MENU ---");
+        System.out.printf("%-4s | %-20s | %-40s | %-8s | %-10s\n", "ID", "Name", "Description", "Price", "Category");
+        System.out.println("-".repeat(90));
+        for (MenuItem item : items) {
+            System.out.printf("%-4d | %-20s | %-40s | $%-7.2f | %-10s\n",
+                    item.getId(), item.getName(), item.getDescription(), item.getPrice(), item.getCategory());
+        }
+        System.out.println("-".repeat(90));
     }
-
 }

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

@@ -1,26 +1,127 @@
 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.*;
+
 public class OrderService {
 
+    private final MenuItemDao menuItemDao = new MenuItemDao();
+    private final OrderDao orderDao = new OrderDao();
+    private final OrderDetailDao orderDetailDao = new OrderDetailDao();
+    private final Scanner scanner = new Scanner(System.in);
+
     public void placeOrder(int userId) {
+        Map<Integer, Integer> cart = new HashMap<>(); // MenuItemID -> Quantity
 
-        // TODO:
-        // Create order
+        while (true) {
+            System.out.print("Enter the ID of the item to add (or 0 to complete order): ");
+            int itemId = scanner.nextInt();
+            if (itemId == 0) {
+                break;
+            }
 
+            MenuItem item = menuItemDao.findById(itemId);
+            if (item == null) {
+                System.out.println("Invalid Menu Item ID! Try again.");
+                continue;
+            }
+
+            System.out.print("Enter quantity: ");
+            int qty = scanner.nextInt();
+            if (qty <= 0) {
+                System.out.println("Quantity must be greater than zero!");
+                continue;
+            }
+
+            cart.put(itemId, cart.getOrDefault(itemId, 0) + qty);
+            System.out.println("Added " + qty + "x " + item.getName() + " to cart.");
+        }
+
+        if (cart.isEmpty()) {
+            System.out.println("Cart is empty. Order cancelled.");
+            return;
+        }
+
+        // Calculate Grand Total
+        double grandTotal = 0;
+        List<OrderDetail> details = new ArrayList<>();
+        for (Map.Entry<Integer, Integer> entry : cart.entrySet()) {
+            MenuItem item = menuItemDao.findById(entry.getKey());
+            double subTotal = item.getPrice() * entry.getValue();
+            grandTotal += subTotal;
+
+            OrderDetail detail = new OrderDetail();
+            detail.setMenuItemId(item.getId());
+            detail.setQuantity(entry.getValue());
+            detail.setPrice(item.getPrice()); // Secure current purchase price
+            details.add(detail);
+        }
+
+        // Persist Order
+        Order order = new Order();
+        order.setUserId(userId);
+        order.setTotalPrice(grandTotal);
+        int orderId = orderDao.save(order);
+
+        if (orderId == -1) {
+            System.out.println("An issue occurred. Order could not be created.");
+            return;
+        }
+
+        // Persist Order Details
+        for (OrderDetail detail : details) {
+            detail.setOrderId(orderId);
+            orderDetailDao.save(detail);
+        }
+
+        System.out.println("\nOrder registered successfully!");
+        printReceipt(orderId);
     }
 
     public void printReceipt(int orderId) {
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);
+        if (details == null || details.isEmpty()) {
+            System.out.println("Receipt not found.");
+            return;
+        }
 
-        // TODO:
-        // Print order receipt
+        System.out.println("\n=======================================");
+        System.out.println("           🧾 ORDER RECEIPT            ");
+        System.out.println("=======================================");
+        System.out.printf("%-20s %-5s %-8s %-8s\n", "Item", "Qty", "Unit", "Total");
+        System.out.println("-".repeat(43));
 
+        double total = 0;
+        for (OrderDetail detail : details) {
+            MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+            double lineTotal = detail.getPrice() * detail.getQuantity();
+            total += lineTotal;
+            System.out.printf("%-20s %-5d $%-7.2f $%-7.2f\n",
+                    item.getName(), detail.getQuantity(), detail.getPrice(), lineTotal);
+        }
+        System.out.println("-".repeat(43));
+        System.out.printf("Final Total:                           $%-7.2f\n", total);
+        System.out.println("=======================================\n");
     }
 
     public void showOrderHistory(int userId) {
+        List<Order> orders = orderDao.findByUserId(userId);
+        if (orders == null || orders.isEmpty()) {
+            System.out.println("No past orders found.");
+            return;
+        }
 
-        // TODO:
-        // Display user's order history
-
+        System.out.println("\n=== PAST ORDERS ===");
+        for (Order o : orders) {
+            System.out.printf("Order #%d | Date: %s | Total Spent: $%.2f\n",
+                    o.getId(), o.getCreatedAt().toString(), o.getTotalPrice());
+        }
+        System.out.println("===================\n");
     }
-
 }

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

@@ -1,44 +1,122 @@
 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 =
-            new Scanner(System.in);
+    private final Scanner scanner = new Scanner(System.in);
+    private final AuthService authService = new AuthService();
+    private final MenuService menuService = new MenuService();
+    private final OrderService orderService = new OrderService();
+
+    private User currentUser = null;
 
     public void start() {
-
         while (true) {
-
-            System.out.println();
-            System.out.println("===== JAVA PIZZERIA =====");
-            System.out.println("1. Login");
-            System.out.println("2. Register");
-            System.out.println("3. Exit");
-
-            int choice = scanner.nextInt();
-
-            switch (choice) {
-
-                case 1:
-                    // TODO
-                    break;
-
-                case 2:
-                    // TODO
-                    break;
-
-                case 3:
-                    return;
-
-                default:
-                    System.out.println("Invalid choice");
-
+            if (currentUser == null) {
+                showAuthMenu();
+            } else {
+                showMainMenu();
             }
-
         }
-
     }
 
+    private void showAuthMenu() {
+        System.out.println();
+        System.out.println("===== JAVA PIZZERIA =====");
+        System.out.println("1. Login");
+        System.out.println("2. Register");
+        System.out.println("3. Exit");
+        System.out.print("Choose an option: ");
+
+        int choice = scanner.nextInt();
+        scanner.nextLine(); // Clear buffer
+
+        switch (choice) {
+            case 1:
+                handleLogin();
+                break;
+            case 2:
+                handleRegister();
+                break;
+            case 3:
+                System.out.println("Goodbye!");
+                System.exit(0);
+            default:
+                System.out.println("Invalid choice");
+        }
+    }
+
+    private void showMainMenu() {
+        System.out.println();
+        System.out.println("===== " + currentUser.getUsername().toUpperCase() + "'S PORTAL =====");
+        System.out.println("1. View Menu");
+        System.out.println("2. Place New Order");
+        System.out.println("3. Order History");
+        System.out.println("4. Logout");
+        System.out.print("Choose an option: ");
+
+        int choice = scanner.nextInt();
+        scanner.nextLine(); // Clear buffer
+
+        switch (choice) {
+            case 1:
+                menuService.showMenu();
+                break;
+            case 2:
+                menuService.showMenu();
+                orderService.placeOrder(currentUser.getId());
+                break;
+            case 3:
+                orderService.showOrderHistory(currentUser.getId());
+                break;
+            case 4:
+                System.out.println("Logging out...");
+                currentUser = null;
+                break;
+            default:
+                System.out.println("Invalid choice");
+        }
+    }
+
+    private void handleLogin() {
+        System.out.println("\n[Login]");
+        System.out.print("Enter username: ");
+        String username = scanner.nextLine();
+        System.out.print("Enter password: ");
+        String password = scanner.nextLine();
+
+        User user = authService.login(username, password);
+        if (user != null) {
+            currentUser = user;
+            System.out.println("Login successful! Welcome, " + user.getUsername());
+        } else {
+            System.out.println("Invalid username or password!");
+        }
+    }
+
+    private void handleRegister() {
+        System.out.println("\n[Registration]");
+        System.out.print("Enter a unique username: ");
+        String username = scanner.nextLine();
+        System.out.print("Enter password: ");
+        String password = scanner.nextLine();
+        System.out.print("Enter email (Optional, press Enter to skip): ");
+        String email = scanner.nextLine();
+        if (email.trim().isEmpty()) {
+            email = null;
+        }
+
+        boolean success = authService.register(username, password, email);
+        if (success) {
+            System.out.println("Registration successful! You can now log in.");
+        } else {
+            System.out.println("Registration failed. Try a different username.");
+        }
+    }
 }