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://maven.myket.ir/" />
+    </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="23" project-jdk-type="JavaSDK" />
+</project>

.idea/vcs.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

database.sql

@@ -8,7 +8,10 @@
 -- 5. Insert at least 3 menu items.
 -- 6. The script should be executable from start to finish without errors.
 
-
+DROP TABLE IF EXISTS order_details CASCADE;
+DROP TABLE IF EXISTS orders CASCADE;
+DROP TABLE IF EXISTS menu_items CASCADE;
+DROP TABLE IF EXISTS users CASCADE;
 
 -- =======================================================
 -- USER TABLE
@@ -28,9 +31,12 @@
 -- - Username and password are required.
 -- - Passwords should not be stored in plain text.
 --
--- CREATE TABLE ...
+CREATE TABLE users (
-
+    id SERIAL PRIMARY KEY,
-
+    username VARCHAR(50) UNIQUE NOT NULL,
+    password VARCHAR(250) NOT NULL,
+    email VARCHAR(100)
+);
 
 -- =======================================================
 -- MENU ITEM TABLE
@@ -50,9 +56,12 @@
 -- - Name is required.
 -- - Price must always be positive.
 --
--- CREATE TABLE ...
+CREATE TABLE menu_items (
-
+  id SERIAL PRIMARY KEY,
-
+  name VARCHAR(100),
+  price DECIMAL(10,2) NOT NULL CHECK (price > 0),
+  category VARCHAR(50)
+);
 
 -- =======================================================
 -- ORDER TABLE
@@ -75,9 +84,15 @@
 -- Avoid using reserved SQL keywords as table names.
 -- Consider using a name such as "orders" or "customer_orders".
 --
--- CREATE TABLE ...
+CREATE TABLE orders (
-
+    id SERIAL PRIMARY KEY,
+    user_id INTEGER NOT NULL,
+    orderDate TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    total_price DECIMAL(10,2) NOT NULL,
 
+    CONSTRAINT fk_orders
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
 
 -- =======================================================
 -- ORDER DETAIL TABLE
@@ -98,7 +113,21 @@
 -- - Quantity must always be greater than zero.
 -- - Store the item's price at the moment of purchase.
 --
--- CREATE TABLE ...
+CREATE TABLE order_details (
+    id SERIAL PRIMARY KEY,
+    order_id INTEGER NOT NULL,
+    menu_items_id INTEGER NOT NULL,
+    quantity INTEGER NOT NULL CHECK (quantity>0),
+    price_at_purchase DECIMAL(10,2) NOT NULL,
+
+    CONSTRAINT fk_order_detail_order
+        FOREIGN KEY (order_id) REFERENCES orders(id)
+        ON DELETE CASCADE,
+
+    CONSTRAINT fk_menu_items_id
+        FOREIGN KEY (menu_items_id) REFERENCES menu_items(id)
+        ON DELETE RESTRICT
+);
 
 
 
@@ -114,7 +143,11 @@
 -- - Pasta
 -- - Drink
 --
--- INSERT INTO ...
+INSERT INTO menu_items (name, price, category) VALUES
+    ('Margherita', 9.99, 'Pizza'),
+    ('Cheeseburger', 8.50, 'Burger'),
+    ('Alfredo pasta', 12.00, 'Pasta'),
+    ('Coca Cola', 2.50, 'Drink');
 
 
 
@@ -125,9 +158,16 @@
 -- You may insert sample users and orders for testing.
 -- This section is optional.
 --
--- INSERT INTO ...
+INSERT INTO users (username, password, email) VALUES
+    ('aga armin', MD5('123456'), 'ar@example.com'),
+    ('mewsoume', MD5('mypass'), 'm@example.com');
 
+INSERT INTO orders (user_id, total_price) VALUES
+    (1, 22.49);
 
+INSERT INTO order_details (order_id, menu_items_id, quantity, price_at_purchase) VALUES
+    (1, 1, 2, 9.99),
+    (1, 3, 1, 12.00);
 
 -- =======================================================
 -- VERIFICATION QUERIES

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

@@ -1,23 +1,65 @@
 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, price, category FROM menu_items";
-        // Retrieve all menu items
+        List<MenuItem> items = new ArrayList<>();
 
-        return null;
+        try(Connection conn = DatabaseConnection.getConnection();
+            PreparedStatement stmt = conn.prepareStatement(sql);
+            ResultSet rs = stmt.executeQuery())
+        {
+            while (rs.next())
+            {
+                MenuItem item = new MenuItem();
+                item.setId(rs.getInt("id"));
+                item.setName(rs.getString("name"));
+                item.setPrice(rs.getDouble("price"));
+                item.setCategory(rs.getString("category"));
+                items.add(item);
+            }
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
+        return items;
     }
 
     public MenuItem findById(int id) {
 
-        // TODO:
+        String sql = "SELECT id, name, price, category FROM menu_items WHERE id = ?";
-        // Find menu item by id
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql))
+        {
+            stmt.setInt(1, id);
+            try (ResultSet rs = stmt.executeQuery())
+            {
+                if (rs.next())
+                {
+                    MenuItem item = new MenuItem();
+                    item.setId(rs.getInt("id"));
+                    item.setName(rs.getString("name"));
+                    item.setPrice(rs.getDouble("price"));
+                    item.setCategory(rs.getString("category"));
+                    return item;
+                }
+            }
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
 
         return null;
     }

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

@@ -1,25 +1,76 @@
 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 (?, ?)";
-        // Insert order and return generated id
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS))
+        {
+            stmt.setInt(1, order.getUserId());
+            stmt.setDouble(2, order.getTotalPrice());
+
+            int affectedRows = stmt.executeUpdate();
+            if (affectedRows == 0)
+            {
+                throw new SQLException("unsuccessful");
+            }
+
+            try (ResultSet generatedKeys = stmt.getGeneratedKeys())
+            {
+                if (generatedKeys.next())
+                {
+                    return generatedKeys.getInt(1);
+                } else
+                {
+                    throw new SQLException("unsuccessful");
+                }
+            }
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
 
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
 
-        // TODO:
+        String sql = "SELECT id, user_id, orderDate, total_price FROM orders WHERE user_id = ? ORDER BY orderDate DESC";
-        // Retrieve all orders of a user
+        List<Order> orders = new ArrayList<>();
 
-        return null;
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql))
+        {
+
+            stmt.setInt(1, userId);
+            try (ResultSet rs = stmt.executeQuery())
+            {
+                while (rs.next())
+                {
+                    Order order = new Order();
+                    order.setId(rs.getInt("id"));
+                    order.setUserId(rs.getInt("user_id"));
+                    order.setCreatedAt(rs.getTimestamp("orderDate").toLocalDateTime());
+                    order.setTotalPrice(rs.getDouble("total_price"));
+                    orders.add(order);
+                }
+            }
+
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
+
+        return orders;
     }
 
 }

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

@@ -1,24 +1,69 @@
 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_items_id, quantity, price_at_purchase) VALUES (? ,? ,? ,?)";
-        // Insert order detail
+        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)
+        {
+            e.printStackTrace();
+        }
 
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
 
-        // TODO:
+        String sql = "SELECT id, order_id, menu_items_id, quantity, price_at_purchase FROM order_details WHERE order_id = ?";
-        // Retrieve order details
 
-        return null;
+        List<OrderDetail> orderDetails = new ArrayList<>();
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql))
+        {
+
+            stmt.setInt(1, orderId);
+            try (ResultSet rs = stmt.executeQuery())
+            {
+                while (rs.next())
+                {
+                    OrderDetail orderDetail = new OrderDetail();
+                    orderDetail.setId(rs.getInt("id"));
+                    orderDetail.setOrderId(rs.getInt("order_id"));
+                    orderDetail.setMenuItemId(rs.getInt("menu_items_id"));
+                    orderDetail.setQuantity(rs.getInt("quantity"));
+                    orderDetail.setPrice(rs.getDouble("price_at_purchase"));
+
+                    orderDetails.add(orderDetail);
+                }
+            }
+
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
+
+        return orderDetails;
     }
 
 }

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

@@ -1,23 +1,59 @@
 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 conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql))
+        {
+            stmt.setString(1, user.getUsername());
+            stmt.setString(2, user.getPassword());
+            stmt.setString(3, user.getEmail());
 
-        return false;
+            int affectedRows = stmt.executeUpdate();
+            return affectedRows > 0;
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+            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 conn = DatabaseConnection.getConnection();
-
+             PreparedStatement stmt = conn.prepareStatement(sql))
+        {
+            stmt.setString(1, username);
+            try (ResultSet rs = stmt.executeQuery())
+            {
+                if (rs.next())
+                {
+                    User user = new User();
+                    user.setId(rs.getInt("id"));
+                    user.setUsername(rs.getString("username"));
+                    user.setPassword(rs.getString("password"));
+                    user.setEmail(rs.getString("email"));
+                    return user;
+                }
+            }
+        } catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
         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/restaurant"; // DB Server
 
     private static final String USER = "postgres"; // Your Username
 
-    private static final String PASSWORD = "password"; // Your Password
+    private static final String PASSWORD = "11"; // Your Password
 
     private DatabaseConnection() {
 
@@ -17,11 +18,9 @@ public class DatabaseConnection {
 
     public static Connection getConnection()
             throws SQLException {
-
-        // TODO:
         // Return a valid PostgreSQL connection
+        return DriverManager.getConnection(URL, USER, PASSWORD);
 
-        return null;
     }
 
 }

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

@@ -12,4 +12,43 @@ public class MenuItem {
 
     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 double getTotalPrice() {
+        return totalPrice;
+    }
+
+    public void setTotalPrice(double totalPrice) {
+        this.totalPrice = totalPrice;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public int getUserId() {
+        return userId;
+    }
+
+    public void setUserId(int userId) {
+        this.userId = userId;
+    }
 }

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 double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    public int getMenuItemId() {
+        return menuItemId;
+    }
+
+    public void setMenuItemId(int menuItemId) {
+        this.menuItemId = menuItemId;
+    }
+
+    public int getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(int orderId) {
+        this.orderId = orderId;
+    }
 }

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

@@ -1,23 +1,106 @@
 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;
+
+    public AuthService() {
+        this.userDao = new UserDao();
+    }
+
     public boolean register(String username, String password, String email) {
 
-        // TODO:
+        if (username == null || username.trim().isEmpty())
-        // Validate and register user
+        {
+            System.err.println("username cannot be empty.");
+            return false;
+        }
+        if (password == null || password.trim().isEmpty())
+        {
+            System.err.println("password cannot be empty.");
+            return false;
+        }
+        User existingUser = userDao.findByUsername(username);
+        if (existingUser != null)
+        {
+            System.err.println("a user with this username is already registered");
+            return false;
+        }
 
-        return false;
+        String hashedPassword = hashPassword(password);
+        if (hashedPassword == null)
+        {
+            System.err.println("error");
+            return false;
+        }
+
+        User newUser = new User();
+        newUser.setUsername(username.trim());
+        newUser.setPassword(hashedPassword);
+        newUser.setEmail(email != null ? email.trim() : null);
+
+        return userDao.save(newUser);
     }
 
     public User login(String username, String password) {
 
-        // TODO:
+        if (username == null || username.trim().isEmpty())
-        // Authenticate user
+        {
+            System.err.println("username cannot be empty.");
+            return null;
+        }
+        if (password == null || password.trim().isEmpty())
+        {
+            System.err.println("password cannot be empty.");
+            return null;
+        }
 
-        return null;
+        User user = userDao.findByUsername(username.trim());
+        if (user == null)
+        {
+            System.err.println("not found");
+            return null;
+        }
+        String hashedPassword = hashPassword(password);
+        if (hashedPassword == null)
+        {
+            System.err.println("error");
+            return null;
+        }
+
+        if (hashedPassword.equals(user.getPassword()))
+        {
+            System.out.println("welcome " + user.getUsername());
+            return user;
+        } else
+        {
+            System.err.println("incorrect password");
+            return null;
+        }
+
+    }
+
+    private String hashPassword(String password)
+    {
+        try {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            byte[] hashBytes = md.digest(password.getBytes());
+
+            StringBuilder sb = new StringBuilder();
+            for (byte b : hashBytes) {
+                sb.append(String.format("%02x", b));
+            }
+            return sb.toString();
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+            return null;
+        }
     }
 
 }

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

@@ -1,11 +1,35 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.model.MenuItem;
+
+import java.util.List;
+
 public class MenuService {
 
+    private final MenuItemDao menuItemDao;
+
+    public MenuService() {
+        this.menuItemDao = new MenuItemDao();
+    }
+
     public void showMenu() {
 
-        // TODO:
+        List<MenuItem> items = menuItemDao.findAll();
-        // Display menu items
+        if (items.isEmpty())
+        {
+            System.out.println("menu is empty");
+            return;
+        }
+
+        System.out.println("\nAvailable Items:");
+        for (MenuItem item : items)
+        {
+            System.out.printf("%d. %s - $%.2f%n",
+                    item.getId(),
+                    item.getName(),
+                    item.getPrice());
+        }
 
     }
 

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

@@ -1,26 +1,119 @@
 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.format.DateTimeFormatter;
+import java.util.List;
+
 public class OrderService {
 
-    public void placeOrder(int userId) {
+    private final OrderDao orderDao;
+    private final OrderDetailDao orderDetailDao;
+    private final MenuItemDao menuItemDao;
 
-        // TODO:
+    public OrderService() {
-        // Create order
+        this.orderDao = new OrderDao();
+        this.orderDetailDao = new OrderDetailDao();
+        this.menuItemDao = new MenuItemDao();
+    }
+
+    public int placeOrder(int userId, List<OrderDetail> cart) {
+
+        if (cart == null || cart.isEmpty()) {
+            System.out.println("cart is empty");
+            return -1;
+        }
+
+        double totalPrice = 0;
+        for (OrderDetail o : cart) {
+            MenuItem item = menuItemDao.findById((o.getMenuItemId()));
+            if (item == null) {
+                System.out.println("menu item with id " + o.getMenuItemId() + "not found");
+                return -1;
+            }
+            o.setPrice(item.getPrice());
+            totalPrice += item.getPrice() * o.getQuantity();
+        }
+
+        Order order = new Order();
+        order.setUserId(userId);
+        order.setTotalPrice(totalPrice);
+
+        int orderId = orderDao.save(order);
+        if (orderId == -1) {
+            System.out.println("failed to save order.");
+            return -1;
+        }
+
+        for (OrderDetail detail : cart) {
+            detail.setOrderId(orderId);
+            orderDetailDao.save(detail);
+        }
+
+        System.out.println("Order saved successfully!");
+        return orderId;
 
     }
 
     public void printReceipt(int orderId) {
 
-        // TODO:
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);
-        // Print order receipt
+        if (details.isEmpty()) {
+            System.out.println("order not found.");
+            return;
+        }
 
+        double total = 0;
+
+        System.out.println("\n[Order Summary / Receipt]");
+        System.out.println("---------------------------------------");
+        System.out.printf("%-12s %-6s %-8s %-10s%n", "Item", "Qty", "Unit", "Total");
+        System.out.println("---------------------------------------");
+
+        for (OrderDetail detail : details) {
+            MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+            String itemName = (item != null) ? item.getName() : "Unknown";
+            double subtotal = detail.getPrice() * detail.getQuantity();
+            total += subtotal;
+
+            System.out.printf("%-12s %-6d $%-7.2f $%-9.2f%n",
+                    itemName,
+                    detail.getQuantity(),
+                    detail.getPrice(),
+                    subtotal);
+        }
+
+        System.out.println("---------------------------------------");
+        System.out.printf("%-12s %-6s %-8s $%-9.2f%n", "", "", "Final Total:", total);
+        System.out.println("---------------------------------------");
     }
 
     public void showOrderHistory(int userId) {
 
-        // TODO:
+        List<Order> orders = orderDao.findByUserId(userId);
-        // Display user's order history
+        if (orders.isEmpty())
+        {
+            System.out.println("you have no orders.");
+            return;
+        }
 
+        System.out.println("\nYour Order History:");
+        System.out.println("--------------------------------------------------");
+        System.out.printf("%-10s %-25s %-15s%n", "Order ID", "Date", "Total");
+        System.out.println("--------------------------------------------------");
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
+        for (Order order : orders) {
+            System.out.printf("%-10d %-25s $%-14.2f%n",
+                    order.getId(),
+                    order.getCreatedAt().format(formatter),
+                    order.getTotalPrice());
+        }
+        System.out.println("--------------------------------------------------");
     }
-
 }
+

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

@@ -1,5 +1,15 @@
 package dev.ui;
 
+import dev.dao.MenuItemDao;
+import dev.model.MenuItem;
+import dev.model.OrderDetail;
+import dev.model.User;
+import dev.service.AuthService;
+import dev.service.MenuService;
+import dev.service.OrderService;
+
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Scanner;
 
 public class ConsoleMenu {
@@ -7,38 +17,164 @@ public class ConsoleMenu {
     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 loggedInUser = null;
+
     public void start() {
 
         while (true) {
-
+            if (loggedInUser == null) {
-            System.out.println();
+                showMainMenu();
-            System.out.println("===== JAVA PIZZERIA =====");
+            } else {
-            System.out.println("1. Login");
+                showUserMenu();
-            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");
-
             }
-
         }
 
     }
 
+    private void showMainMenu()
+    {
+        System.out.println();
+        System.out.println("=======================================");
+        System.out.println("      🍕 WELCOME TO JAVA PIZZERIA 🍕");
+        System.out.println("=======================================");
+        System.out.println("1. Login");
+        System.out.println("2. Register New Account");
+        System.out.println("3. Exit");
+        System.out.println("=======================================");
+        System.out.print("Choose an option: ");
+
+        int choice = getIntInput();
+        switch (choice)
+        {
+            case 1 -> login();
+            case 2 -> register();
+            case 3 -> {
+                System.out.println("goodbye");
+                System.exit(0);
+            }
+            default -> System.out.println("invalid choice.");
+        }
+    }
+
+    private void showUserMenu()
+    {
+        System.out.println();
+        System.out.println("=======================================");
+        System.out.println("          🍽️ MAIN MENU 🍽️");
+        System.out.println("=======================================");
+        System.out.println("1. View Menu");
+        System.out.println("2. Place a New Order");
+        System.out.println("3. View Order History");
+        System.out.println("4. Logout");
+        System.out.println("=======================================");
+        System.out.print("Choose an option: ");
+
+        int choice = getIntInput();
+        switch (choice)
+        {
+            case 1 -> menuService.showMenu();
+            case 2 -> placeOrder();
+            case 3 -> orderService.showOrderHistory(loggedInUser.getId());
+            case 4 -> {
+                loggedInUser = null;
+                System.out.println("logged out.");
+            }
+            default -> System.out.println("invalid choice.");
+        }
+    }
+
+    private void login()
+    {
+        System.out.println("\n[Login]");
+        System.out.print("Enter username: ");
+        String username = scanner.nextLine().trim();
+        System.out.print("Enter password: ");
+        String password = scanner.nextLine().trim();
+
+        User user = authService.login(username, password);
+        if (user != null)
+        {
+            loggedInUser = user;
+        }
+    }
+
+    private void register()
+    {
+        System.out.println("\n[Register]");
+        System.out.print("Enter username: ");
+        String username = scanner.nextLine().trim();
+        System.out.print("Enter password: ");
+        String password = scanner.nextLine().trim();
+        System.out.print("Enter email (optional, press Enter to skip): ");
+        String email = scanner.nextLine().trim();
+        if (email.isEmpty()) email = null;
+
+        boolean success = authService.register(username, password, email);
+        if (success)
+        {
+            System.out.println("registration successful. Please login.");
+        }
+    }
+
+    private void placeOrder()
+    {
+        System.out.println("\n[Placing Order]");
+        menuService.showMenu();
+
+        List<OrderDetail> cart = new ArrayList<>();
+        while (true)
+        {
+            System.out.print("\nEnter the ID of the item to add (or 0 to finish): ");
+            int itemId = getIntInput();
+            if (itemId == 0) break;
+
+            MenuItem item = new MenuItemDao().findById(itemId);
+            if (item == null)
+            {
+                System.out.println("item not found.");
+                continue;
+            }
+
+            System.out.print("Enter quantity: ");
+            int quantity = getIntInput();
+            if (quantity <= 0)
+            {
+                System.out.println("quantity must be greater than 0.");
+                continue;
+            }
+
+            OrderDetail detail = new OrderDetail();
+            detail.setMenuItemId(itemId);
+            detail.setQuantity(quantity);
+            cart.add(detail);
+
+            System.out.printf("Added %dx %s to your cart.%n", quantity, item.getName());
+        }
+
+        if (cart.isEmpty())
+        {
+            System.out.println("cart is empty. Order cancelled.");
+            return;
+        }
+
+        int orderId = orderService.placeOrder(loggedInUser.getId(), cart);
+        if (orderId != -1)
+        {
+            orderService.printReceipt(orderId);
+        }
+    }
+
+    private int getIntInput() {
+        while (true) {
+            try {
+                return Integer.parseInt(scanner.nextLine().trim());
+            } catch (NumberFormatException e) {
+                System.out.print("please enter a number: ");
+            }
+        }
+    }
 }