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

Reviewed-on: amirmohammad/WS-10-Database#1

100 / 100 with leniency

consider : hashing passwords before storing them in the database

.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://maven.devneeds.ir/" />
+    </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 +1,93 @@
--- Restaurant Database Management System
+DROP TABLE IF EXISTS order_details CASCADE;
---
+DROP TABLE IF EXISTS orders CASCADE;
--- Instructions:
+DROP TABLE IF EXISTS menu_items CASCADE;
--- 1. Create all required tables.
+DROP TABLE IF EXISTS users CASCADE;
--- 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 users (
+    id BIGSERIAL PRIMARY KEY,
+    username VARCHAR(50) NOT NULL UNIQUE,
+    password_hash VARCHAR(255) NOT NULL,
+    email VARCHAR(100) UNIQUE
+);
 
 -- =======================================================
 -- 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 menu_items (
+    id BIGSERIAL PRIMARY KEY,
+    name VARCHAR(100) NOT NULL,
+    description TEXT,
+    price NUMERIC(10,2) NOT NULL CHECK (price > 0),
+    category VARCHAR(50)
+);
 
 -- =======================================================
--- ORDER TABLE
+-- ORDERS 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 orders (
+    id BIGSERIAL PRIMARY KEY,
+    user_id BIGINT NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    total_price NUMERIC(10,2) NOT NULL CHECK (total_price >= 0),
 
+    CONSTRAINT fk_orders_user
+        FOREIGN KEY (user_id)
+        REFERENCES users(id)
+        ON DELETE CASCADE
+);
 
 -- =======================================================
--- ORDER DETAIL TABLE
+-- ORDER DETAILS 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 order_details (
+    id BIGSERIAL PRIMARY KEY,
+    order_id BIGINT NOT NULL,
+    menu_item_id BIGINT NOT NULL,
+    quantity INTEGER NOT NULL CHECK (quantity > 0),
+    item_price NUMERIC(10,2) NOT NULL CHECK (item_price > 0),
 
+    CONSTRAINT fk_order_details_order
+        FOREIGN KEY (order_id)
+        REFERENCES orders(id)
+        ON DELETE CASCADE,
+
+    CONSTRAINT fk_order_details_menu_item
+        FOREIGN KEY (menu_item_id)
+        REFERENCES menu_items(id)
+);
 
 -- =======================================================
 -- INITIAL MENU DATA
 -- =======================================================
---
--- Insert at least 3 food or drink items.
---
--- Example categories:
--- - Pizza
--- - Burger
--- - Pasta
--- - Drink
---
--- INSERT INTO ...
-
 
+INSERT INTO menu_items (name, description, price, category)
+VALUES
+('Pepperoni Pizza', 'Classic pepperoni pizza', 10.99, 'Pizza'),
+('Cheese Burger', 'Beef burger with cheese', 8.50, 'Burger'),
+('Chicken Pasta', 'Creamy chicken pasta', 12.75, 'Pasta'),
+('Coca Cola', 'Soft drink', 2.50, 'Drink');
 
 -- =======================================================
 -- OPTIONAL TEST DATA
 -- =======================================================
---
--- You may insert sample users and orders for testing.
--- This section is optional.
---
--- INSERT INTO ...
 
+INSERT INTO users (username, password_hash, email)
+VALUES
+('ali', 'hashed_password_1', 'ali@example.com'),
+('sara', 'hashed_password_2', 'sara@example.com');
 
+INSERT INTO orders (user_id, total_price)
+VALUES
+(1, 24.48);
 
--- =======================================================
+INSERT INTO order_details (order_id, menu_item_id, quantity, item_price)
--- VERIFICATION QUERIES
+VALUES
--- =======================================================
+(1, 1, 2, 10.99),
---
+(1, 4, 1, 2.50);
--- Uncomment these queries to verify your database.
---
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;

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

@@ -1,25 +1,72 @@
 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.util.ArrayList;
 import java.util.List;
 
 public class MenuItemDao {
 
     public List<MenuItem> findAll() {
 
-        // TODO:
+        List<MenuItem> items = new ArrayList<>();
-        // Retrieve all menu items
 
-        return null;
+        String sql = "SELECT * FROM menu_items";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql);
+             ResultSet rs = ps.executeQuery()) {
+
+            while (rs.next()) {
+
+                MenuItem item = new MenuItem();
+                item.setId(rs.getInt("id"));
+                item.setName(rs.getString("name"));
+                item.setDescription(rs.getString("description"));
+                item.setPrice(rs.getDouble("price"));
+                item.setCategory(rs.getString("category"));
+
+                items.add(item);
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return items;
     }
 
     public MenuItem findById(int id) {
 
-        // TODO:
+        String sql = "SELECT * FROM menu_items WHERE id = ?";
-        // Find menu item by id
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setInt(1, id);
+
+            ResultSet rs = ps.executeQuery();
+
+            if (rs.next()) {
+
+                MenuItem item = new MenuItem();
+                item.setId(rs.getInt("id"));
+                item.setName(rs.getString("name"));
+                item.setDescription(rs.getString("description"));
+                item.setPrice(rs.getDouble("price"));
+                item.setCategory(rs.getString("category"));
+
+                return item;
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
 
         return null;
     }
-
 }

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

@@ -1,25 +1,91 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.Order;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.Statement;
+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 (?, ?)";
-        // Insert order and return generated id
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS)) {
+
+            ps.setInt(1, order.getUserId());
+            ps.setDouble(2, order.getTotalPrice());
+
+            int affectedRows = ps.executeUpdate();
+
+            if (affectedRows == 0) {
+                return -1;
+            }
+
+            ResultSet keys = ps.getGeneratedKeys();
+
+            if (keys.next()) {
+                return keys.getInt(1);
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
 
         return -1;
     }
 
-    public List<Order> findByUserId(int userId) {
+    public void updateTotalPrice(int orderId, double totalPrice) {
 
-        // TODO:
+        String sql = "UPDATE orders SET total_price = ? WHERE id = ?";
-        // Retrieve all orders of a user
 
-        return null;
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setDouble(1, totalPrice);
+            ps.setInt(2, orderId);
+
+            ps.executeUpdate();
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
     }
 
+    public List<Order> findByUserId(int userId) {
+
+        List<Order> orders = new ArrayList<>();
+
+        String sql = "SELECT * FROM orders WHERE user_id = ? ORDER BY created_at DESC";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setInt(1, userId);
+
+            ResultSet rs = ps.executeQuery();
+
+            while (rs.next()) {
+
+                Order order = new Order();
+                order.setId(rs.getInt("id"));
+                order.setUserId(rs.getInt("user_id"));
+                order.setCreatedAt(rs.getTimestamp("created_at").toLocalDateTime());
+                order.setTotalPrice(rs.getDouble("total_price"));
+
+                orders.add(order);
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return orders;
+    }
 }

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

@@ -1,24 +1,64 @@
 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.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, item_price) VALUES (?, ?, ?, ?)";
-        // Insert order detail
 
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setLong(1, detail.getOrderId());
+            ps.setLong(2, detail.getMenuItemId());
+            ps.setInt(3, detail.getQuantity());
+            ps.setDouble(4, detail.getPrice());
+
+            ps.executeUpdate();
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
 
-        // TODO:
+        List<OrderDetail> list = new ArrayList<>();
-        // Retrieve order details
 
-        return null;
+        String sql = "SELECT * FROM order_details WHERE order_id = ?";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setInt(1, orderId);
+
+            ResultSet rs = ps.executeQuery();
+
+            while (rs.next()) {
+
+                OrderDetail detail = new OrderDetail();
+                detail.setId(rs.getInt("id"));
+                detail.setOrderId(rs.getInt("order_id"));
+                detail.setMenuItemId(rs.getInt("menu_item_id"));
+                detail.setQuantity(rs.getInt("quantity"));
+                detail.setPrice(rs.getDouble("item_price"));
+
+                list.add(detail);
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return list;
     }
-
 }

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

@@ -1,23 +1,60 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.User;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
 public class UserDao {
 
     public boolean save(User user) {
 
-        // TODO:
+        String sql = "INSERT INTO users (username, password_hash, email) VALUES (?, ?, ?)";
-        // Insert user into database
 
-        return false;
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setString(1, user.getUsername());
+            ps.setString(2, user.getPassword());
+            ps.setString(3, user.getEmail());
+
+            ps.executeUpdate();
+            return true;
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return false;
+        }
     }
 
     public User findByUsername(String username) {
 
-        // TODO:
+        String sql = "SELECT * FROM users WHERE username = ?";
-        // Find a user by username
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setString(1, username);
+
+            ResultSet rs = ps.executeQuery();
+
+            if (rs.next()) {
+
+                User user = new User();
+                user.setId(rs.getInt("id"));
+                user.setUsername(rs.getString("username"));
+                user.setPassword(rs.getString("password_hash"));
+                user.setEmail(rs.getString("email"));
+
+                return user;
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
 
         return null;
     }
-
 }

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

@@ -1,27 +1,23 @@
 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/restaurant_db";
 
-    private static final String USER = "postgres"; // Your Username
+    private static final String USER = "postgres";
 
-    private static final String PASSWORD = "password"; // Your Password
+    private static final String PASSWORD = "1234";
 
     private DatabaseConnection() {
-
     }
 
-    public static Connection getConnection()
+    public static Connection getConnection() throws SQLException {
-            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 +3,51 @@ package dev.model;
 public class MenuItem {
 
     private int id;
-
     private String name;
-
     private String description;
-
     private double price;
-
     private String category;
 
+    public MenuItem() {
+    }
+
+    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 +5,42 @@ import java.time.LocalDateTime;
 public class Order {
 
     private int id;
-
     private int userId;
-
     private LocalDateTime createdAt;
-
     private double totalPrice;
 
+    public Order() {
+    }
+
+    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

@@ -3,13 +3,51 @@ package dev.model;
 public class OrderDetail {
 
     private int id;
-
     private int orderId;
-
     private int menuItemId;
-
     private int quantity;
-
     private double price;
 
+    public OrderDetail() {
+    }
+
+    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

@@ -3,11 +3,42 @@ package dev.model;
 public class User {
 
     private int id;
-
     private String username;
-
     private String password;
-
     private String email;
 
+    public User() {
+    }
+
+    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 +1,46 @@
 package dev.service;
 
+import dev.dao.UserDao;
 import dev.model.User;
 
 public class AuthService {
 
+    private final UserDao userDao = new UserDao();
+
     public boolean register(String username, String password, String email) {
 
-        // TODO:
+        if (username == null || password == null || username.isEmpty() || password.isEmpty()) {
-        // Validate and register user
+            System.out.println("Username or password cannot be empty!");
+            return false;
+        }
 
-        return false;
+        if (userDao.findByUsername(username) != null) {
+            System.out.println("Username already exists!");
+            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
 
-        return null;
+        if (user == null) {
+            System.out.println("User not found!");
+            return null;
+        }
+
+        if (!user.getPassword().equals(password)) {
+            System.out.println("Wrong password!");
+            return null;
+        }
+
+        return user;
     }
-
 }

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

@@ -1,12 +1,34 @@
 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:
+        List<MenuItem> items = menuItemDao.findAll();
-        // Display menu items
 
+        System.out.println("========== MENU ==========");
+
+        if (items.isEmpty()) {
+            System.out.println("No items available.");
+            return;
+        }
+
+        for (MenuItem item : items) {
+            System.out.println(
+                    item.getId() + " - " +
+                            item.getName() + " | " +
+                            item.getPrice() + " | " +
+                            item.getCategory()
+            );
+        }
+
+        System.out.println("==========================");
     }
-
 }

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

@@ -1,26 +1,117 @@
 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.time.LocalDateTime;
+import java.util.List;
+import java.util.Scanner;
+
 public class OrderService {
 
+    private final OrderDao orderDao = new OrderDao();
+    private final OrderDetailDao orderDetailDao = new OrderDetailDao();
+    private final MenuItemDao menuItemDao = new MenuItemDao();
+
+    private final Scanner scanner = new Scanner(System.in);
+
     public void placeOrder(int userId) {
 
-        // TODO:
+        Order order = new Order();
-        // Create order
+        order.setUserId(userId);
+        order.setCreatedAt(LocalDateTime.now());
 
+        double total = 0;
+
+        int orderId = orderDao.save(order);
+
+        if (orderId == -1) {
+            System.out.println("Failed to create order!");
+            return;
+        }
+
+        while (true) {
+
+            System.out.println("Enter menu item id (0 to finish): ");
+            int itemId = scanner.nextInt();
+
+            if (itemId == 0) break;
+
+            MenuItem item = menuItemDao.findById(itemId);
+
+            if (item == null) {
+                System.out.println("Item not found!");
+                continue;
+            }
+
+            System.out.println("Enter quantity: ");
+            int qty = scanner.nextInt();
+
+            double itemTotal = item.getPrice() * qty;
+            total += itemTotal;
+
+            OrderDetail detail = new OrderDetail();
+            detail.setOrderId(orderId);
+            detail.setMenuItemId(itemId);
+            detail.setQuantity(qty);
+            detail.setPrice(item.getPrice());
+
+            orderDetailDao.save(detail);
+
+            System.out.println("Added: " + item.getName());
+        }
+
+        order.setTotalPrice(total);
+        orderDao.updateTotalPrice(orderId, total);
+
+        System.out.println("Order placed successfully! Total: " + total);
     }
 
     public void printReceipt(int orderId) {
 
-        // TODO:
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);
-        // Print order receipt
 
+        System.out.println("===== RECEIPT =====");
+
+        double total = 0;
+
+        for (OrderDetail d : details) {
+
+            MenuItem item = menuItemDao.findById((int) d.getMenuItemId());
+
+            double lineTotal = d.getPrice() * d.getQuantity();
+            total += lineTotal;
+
+            System.out.println(
+                    item.getName() + " x " +
+                            d.getQuantity() + " = " +
+                            lineTotal
+            );
+        }
+
+        System.out.println("-------------------");
+        System.out.println("TOTAL: " + total);
+        System.out.println("===================");
     }
 
     public void showOrderHistory(int userId) {
 
-        // TODO:
+        List<Order> orders = orderDao.findByUserId(userId);
-        // Display user's order history
 
+        System.out.println("===== ORDER HISTORY =====");
+
+        for (Order o : orders) {
+            System.out.println(
+                    "Order ID: " + o.getId() +
+                            " | Date: " + o.getCreatedAt() +
+                            " | Total: " + o.getTotalPrice()
+            );
+        }
+
+        System.out.println("=========================");
     }
-
 }

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

@@ -1,11 +1,21 @@
 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();
+
+    private User loggedInUser;
 
     public void start() {
 
@@ -18,15 +28,16 @@ public class ConsoleMenu {
             System.out.println("3. Exit");
 
             int choice = scanner.nextInt();
+            scanner.nextLine(); // consume newline
 
             switch (choice) {
 
                 case 1:
-                    // TODO
+                    login();
                     break;
 
                 case 2:
-                    // TODO
+                    register();
                     break;
 
                 case 3:
@@ -34,11 +45,84 @@ public class ConsoleMenu {
 
                 default:
                     System.out.println("Invalid choice");
-
             }
-
         }
-
     }
 
+    private void login() {
+
+        System.out.print("Username: ");
+        String username = scanner.nextLine();
+
+        System.out.print("Password: ");
+        String password = scanner.nextLine();
+
+        loggedInUser = authService.login(username, password);
+
+        if (loggedInUser == null) {
+            System.out.println("Login failed!");
+            return;
+        }
+
+        System.out.println("Login successful!");
+        mainMenu();
+    }
+
+    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 mainMenu() {
+
+        while (loggedInUser != null) {
+
+            System.out.println();
+            System.out.println("===== MAIN MENU =====");
+            System.out.println("1. View Menu");
+            System.out.println("2. Place Order");
+            System.out.println("3. View Order History");
+            System.out.println("4. Logout");
+
+            int choice = scanner.nextInt();
+
+            switch (choice) {
+
+                case 1:
+                    menuService.showMenu();
+                    break;
+
+                case 2:
+                    orderService.placeOrder(loggedInUser.getId());
+                    break;
+
+                case 3:
+                    orderService.showOrderHistory(loggedInUser.getId());
+                    break;
+
+                case 4:
+                    loggedInUser = null;
+                    System.out.println("Logged out!");
+                    break;
+
+                default:
+                    System.out.println("Invalid choice");
+            }
+        }
+    }
 }