implement database persistence layer and core restaurant backend logic

.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="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.aliyun.com/repository/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="homebrew-26" 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 +1,68 @@
 -- Restaurant Database Management System
---
+-- Workshop 10 - Database Schema & Initial Data
--- 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.
-
 
+-- پاک کردن جدول‌های قدیمی در صورت وجود (به ترتیب برعکس وابستگی برای جلوگیری از ارور Foreign Key)
+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
 -- =======================================================
---
+CREATE TABLE users (
--- Represents customers using the system.
+    id SERIAL PRIMARY KEY,
---
+    username VARCHAR(50) NOT NULL UNIQUE,
--- Required information:
+    password_hash VARCHAR(255) NOT NULL, -- ذخیره به صورت هش شده مطابق نیازمندی
--- - Unique identifier
+    email VARCHAR(100)
--- - 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 ...
-
-
 
 -- =======================================================
 -- MENU ITEM TABLE
 -- =======================================================
---
+CREATE TABLE menu_items (
--- Represents available food and drink items.
+    id SERIAL PRIMARY KEY,
---
+    name VARCHAR(100) NOT NULL,
--- Required information:
+    description TEXT,
--- - Unique identifier
+    price DECIMAL(10, 2) NOT NULL CHECK (price > 0), -- قید مثبت بودن قیمت
--- - Name
+    category VARCHAR(50)
--- - Description (optional)
+);
--- - Price
--- - Category (optional)
---
--- Requirements:
--- - Each menu item must have a unique identifier.
--- - Name is required.
--- - Price must always be positive.
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
 -- ORDER TABLE
 -- =======================================================
---
+-- از نام جایگزین orders استفاده شده چون order کلمه کلیدی رزرو شده SQL است.
--- Represents orders placed by customers.
+CREATE TABLE orders (
---
+    id SERIAL PRIMARY KEY,
--- Required information:
+    user_id INT NOT NULL,
--- - Unique identifier
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
--- - Reference to customer
+    total_price DECIMAL(10, 2) NOT NULL DEFAULT 0.00,
--- - Creation date and time
+    CONSTRAINT fk_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
--- - Total price
+);
---
--- Requirements:
--- - Each order must belong to exactly one user.
--- - A user can have multiple orders.
--- - The relationship between User and Order must be implemented.
---
--- Note:
--- Avoid using reserved SQL keywords as table names.
--- Consider using a name such as "orders" or "customer_orders".
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
 -- ORDER DETAIL TABLE
 -- =======================================================
---
+CREATE TABLE order_details (
--- Represents items inside an order.
+    id SERIAL PRIMARY KEY,
---
+    order_id INT NOT NULL,
--- Required information:
+    menu_item_id INT NOT NULL,
--- - Unique identifier
+    quantity INT NOT NULL CHECK (quantity > 0), -- قید بزرگتر از صفر بودن تعداد
--- - Reference to an order
+    unit_price DECIMAL(10, 2) NOT NULL, -- ذخیره قیمت زمان خرید (اگر بعداً قیمت منو عوض شد، فاکتورهای قبلی خراب نشوند)
--- - Reference to a menu item
+    CONSTRAINT fk_order FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE CASCADE,
--- - Quantity
+    CONSTRAINT fk_menu_item FOREIGN KEY (menu_item_id) REFERENCES menu_items(id) ON DELETE RESTRICT
--- - Item price at purchase time
+);
---
--- Requirements:
--- - Each detail record must belong to one order.
--- - Each detail record must reference one menu item.
--- - Quantity must always be greater than zero.
--- - Store the item's price at the moment of purchase.
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
--- INITIAL MENU DATA
+-- INITIAL MENU DATA (حداقل ۳ آیتم)
 -- =======================================================
---
+INSERT INTO menu_items (name, description, price, category) VALUES
--- Insert at least 3 food or drink items.
+('Pizza', 'Delicious Pepperoni Pizza with mozzarella cheese', 10.00, 'Food'),
---
+('Burger', 'Juicy Beef Burger with cheddar cheese and fries', 8.00, 'Food'),
--- Example categories:
+('Pasta', 'Creamy Alfredo Pasta with grilled chicken', 12.00, 'Food'),
--- - Pizza
+('Soda', 'Cold refreshing soft drink', 2.00, 'Drink');
--- - Burger
--- - Pasta
--- - Drink
---
--- INSERT INTO ...
-
-
 
 -- =======================================================
--- OPTIONAL TEST DATA
+-- VERIFICATION QUERIES (کدهای تایید صحت ساختار)
 -- =======================================================
---
+SELECT * FROM menu_items;
--- You may insert sample users and orders for testing.
--- This section is optional.
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- VERIFICATION QUERIES
--- =======================================================
---
--- Uncomment these queries to verify your database.
---
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;

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

@@ -1,25 +1,62 @@
 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() {
+        List<MenuItem> items = new ArrayList<>();
+        String query = "SELECT * FROM menu_items";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve all menu items
+             PreparedStatement stmt = conn.prepareStatement(query);
+             ResultSet rs = stmt.executeQuery()) {
 
-        return null;
+            while (rs.next()) {
+                MenuItem item = new MenuItem(
+                        rs.getInt("id"),
+                        rs.getString("name"),
+                        rs.getString("description"),
+                        rs.getDouble("price"),
+                        rs.getString("category")
+                );
+                items.add(item);
+            }
+        } catch (SQLException e) {
+            System.err.println("Error retrieving menu items: " + e.getMessage());
+        }
+        return items;
     }
 
     public MenuItem findById(int id) {
+        String query = "SELECT * FROM menu_items WHERE id = ?";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Find menu item by id
+             PreparedStatement stmt = conn.prepareStatement(query)) {
 
+            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("Error finding menu item by id: " + e.getMessage());
+        }
         return null;
     }
-
 }

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

@@ -1,25 +1,59 @@
 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) {
+        String query = "INSERT INTO orders (user_id, total_price) VALUES (?, ?)";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Insert order and return generated id
+             PreparedStatement stmt = conn.prepareStatement(query, Statement.RETURN_GENERATED_KEYS)) {
 
+            stmt.setInt(1, order.getUserId());
+            stmt.setDouble(2, order.getTotalPrice());
+
+            int affectedRows = stmt.executeUpdate();
+            if (affectedRows > 0) {
+                try (ResultSet generatedKeys = stmt.getGeneratedKeys()) {
+                    if (generatedKeys.next()) {
+                        return generatedKeys.getInt(1); // برگرداندن آیدی خودکار تولید شده فاکتور
+                    }
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Error saving order: " + e.getMessage());
+        }
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
+        List<Order> orders = new ArrayList<>();
+        String query = "SELECT * FROM orders WHERE user_id = ? ORDER BY created_at DESC";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve all orders of a user
+             PreparedStatement stmt = conn.prepareStatement(query)) {
 
-        return null;
+            stmt.setInt(1, userId);
+
+            try (ResultSet rs = stmt.executeQuery()) {
+                while (rs.next()) {
+                    Order order = new Order(
+                            rs.getInt("id"),
+                            rs.getInt("user_id"),
+                            rs.getTimestamp("created_at").toLocalDateTime(),
+                            rs.getDouble("total_price")
+                    );
+                    orders.add(order);
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Error retrieving user orders: " + e.getMessage());
+        }
+        return orders;
     }
-
 }

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

@@ -1,24 +1,58 @@
 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) {
+        String query = "INSERT INTO order_details (order_id, menu_item_id, quantity, unit_price) VALUES (?, ?, ?, ?)";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Insert order detail
+             PreparedStatement stmt = conn.prepareStatement(query)) {
 
+            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("Error saving order detail: " + e.getMessage());
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
+        List<OrderDetail> details = new ArrayList<>();
+        String query = "SELECT * FROM order_details WHERE order_id = ?";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve order details
+             PreparedStatement stmt = conn.prepareStatement(query)) {
 
-        return null;
+            stmt.setInt(1, orderId);
+
+            try (ResultSet rs = stmt.executeQuery()) {
+                while (rs.next()) {
+                    OrderDetail detail = new OrderDetail(
+                            rs.getInt("id"),
+                            rs.getInt("order_id"),
+                            rs.getInt("menu_item_id"),
+                            rs.getInt("quantity"),
+                            rs.getDouble("unit_price")
+                    );
+                    details.add(detail);
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Error retrieving order details: " + e.getMessage());
+        }
+        return details;
     }
-
 }

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

@@ -1,23 +1,54 @@
 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) {
+        String query = "INSERT INTO users (username, password_hash, email) VALUES (?, ?, ?)";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Insert user into database
+             PreparedStatement stmt = conn.prepareStatement(query)) {
 
-        return false;
+            stmt.setString(1, user.getUsername());
+            stmt.setString(2, user.getPassword()); // مقدار پاس داده شده (که در سرویس لایه باید هش شده باشد)
+            stmt.setString(3, user.getEmail());
+
+            int affectedRows = stmt.executeUpdate();
+            return affectedRows > 0;
+
+        } catch (SQLException e) {
+            System.err.println("Error saving user: " + e.getMessage());
+            return false;
+        }
     }
 
     public User findByUsername(String username) {
+        String query = "SELECT * FROM users WHERE username = ?";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Find a user by username
+             PreparedStatement stmt = conn.prepareStatement(query)) {
 
+            stmt.setString(1, username);
+
+            try (ResultSet rs = stmt.executeQuery()) {
+                if (rs.next()) {
+                    return new User(
+                            rs.getInt("id"),
+                            rs.getString("username"),
+                            rs.getString("password_hash"),
+                            rs.getString("email")
+                    );
+                }
+            }
+        } catch (SQLException e) {
+            System.err.println("Error finding user by username: " + e.getMessage());
+        }
         return null;
     }
-
 }

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

@@ -1,27 +1,20 @@
 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 (اینجا پسورد دیتابیس خودت رو بذار)
-    private static final String PASSWORD = "password"; // Your Password
 
     private DatabaseConnection() {
-
     }
 
-    public static Connection getConnection()
+    public static Connection getConnection() throws SQLException {
-            throws SQLException {
+        // بازگرداندن یک کانکشن معتبر به PostgreSQL دیتابیس
-
+        return DriverManager.getConnection(URL, USER, PASSWORD);
-        // TODO:
-        // Return a valid PostgreSQL connection
-
-        return null;
     }
-
 }

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

@@ -3,13 +3,35 @@ 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;
+    }
+
+    // گترها و سترها
+    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 +5,30 @@ 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;
+    }
+
+    // گترها و سترها
+    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 +3,35 @@ 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;
+    }
+
+    // گترها و سترها
+    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 +3,32 @@ package dev.model;
 public class User {
 
     private int id;
-
     private String username;
-
     private String password;
-
     private String email;
 
+    // سازنده خالی
+    public User() {
+    }
+
+    // سازنده با تمام فیلدها برای زمان خواندن از دیتابیس
+    public User(int id, String username, String password, String email) {
+        this.id = id;
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+
+    // گترها و سترها
+    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 +1,79 @@
 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) {
+        // چک کردن تهی نبودن ورودی‌های اجباری
+        if (username == null || username.trim().isEmpty() || password == null || password.trim().isEmpty()) {
+            System.out.println("Username and password cannot be empty!");
+            return false;
+        }
 
-        // TODO:
+        // بررسی یکتا بودن نام کاربری در دیتابیس
-        // Validate and register user
+        if (userDao.findByUsername(username) != null) {
+            System.out.println("Username already exists!");
+            return false;
+        }
 
-        return false;
+        // هش کردن پسورد برای امنیت دیتابیس طبق داک پروژه
+        String hashedPassword = hashPassword(password);
+        if (hashedPassword == null) {
+            return false;
+        }
+
+        // ساخت آبجکت کاربر جدید و ذخیره در دیتابیس
+        User newUser = new User();
+        newUser.setUsername(username);
+        newUser.setPassword(hashedPassword);
+        newUser.setEmail(email);
+
+        return userDao.save(newUser);
     }
 
     public User login(String username, String password) {
+        if (username == null || password == null) {
+            return null;
+        }
 
-        // TODO:
+        // پیدا کردن کاربر از روی نام کاربری
-        // Authenticate user
+        User user = userDao.findByUsername(username);
+        if (user == null) {
+            System.out.println("User not found!");
+            return null;
+        }
 
+        // هش کردن پسورد ورودی برای مقایسه با هش داخل دیتابیس
+        String hashedInput = hashPassword(password);
+        if (hashedInput != null && hashedInput.equals(user.getPassword())) {
+            return user; // ورود موفق
+        }
+
+        System.out.println("Incorrect password!");
         return null;
     }
 
+    // متد کمکی برای هش کردن کلمه عبور به روش SHA-256
+    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) {
+            System.err.println("Error hashing password: " + e.getMessage());
+            return null;
+        }
+    }
 }

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() {
+        List<MenuItem> items = menuItemDao.findAll();
 
-        // TODO:
+        if (items == null || items.isEmpty()) {
-        // Display menu items
+            System.out.println("The menu is currently empty.");
+            return;
+        }
 
+        System.out.println("\n=======================================");
+        System.out.println("            🍽️ OUR MENU 🍽️            ");
+        System.out.println("=======================================");
+        System.out.printf("%-4s | %-12s | %-7s | %-20s\n", "ID", "Name", "Price", "Description");
+        System.out.println("---------------------------------------");
+
+        for (MenuItem item : items) {
+            System.out.printf("%-4d | %-12s | $%-6.2f | %-20s\n",
+                    item.getId(),
+                    item.getName(),
+                    item.getPrice(),
+                    item.getDescription() != null ? item.getDescription() : "");
+        }
+        System.out.println("=======================================");
     }
-
 }

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

@@ -1,26 +1,133 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.dao.OrderDao;
+import dev.dao.OrderDetailDao;
+import dev.model.MenuItem;
+import dev.model.Order;
+import dev.model.OrderDetail;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
 public class OrderService {
 
+    private final 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) {
+        List<OrderDetail> cart = new ArrayList<>();
+        double totalPrice = 0.0;
 
-        // TODO:
+        System.out.println("\n[Placing Order]");
-        // Create order
 
+        while (true) {
+            System.out.print("Enter the ID of the item to add (or 0 to finish): ");
+            int itemId = scanner.nextInt();
+            if (itemId == 0) {
+                break;
+            }
+
+            MenuItem item = menuItemDao.findById(itemId);
+            if (item == null) {
+                System.out.println("Invalid Item ID! Please try again.");
+                continue;
+            }
+
+            System.out.print("Enter quantity: ");
+            int quantity = scanner.nextInt();
+            if (quantity <= 0) {
+                System.out.println("Quantity must be greater than zero!");
+                continue;
+            }
+
+            // ساخت جزئیات سفارش با قیمت زمان خرید
+            OrderDetail detail = new OrderDetail();
+            detail.setMenuItemId(item.getId());
+            detail.setQuantity(quantity);
+            detail.setPrice(item.getPrice());
+
+            cart.add(detail);
+            totalPrice += item.getPrice() * quantity;
+
+            System.out.printf("Added %dx %s to your cart.\n", quantity, item.getName());
+        }
+
+        if (cart.isEmpty()) {
+            System.out.println("Order cancelled. Cart is empty.");
+            return;
+        }
+
+        // ۱. ذخیره سفارش اصلی در دیتابیس و گرفتن آیدی تولید شده
+        Order order = new Order();
+        order.setUserId(userId);
+        order.setTotalPrice(totalPrice);
+
+        int orderId = orderDao.save(order);
+
+        if (orderId != -1) {
+            // ۲. ذخیره تک‌تک جزئیات سبد خرید متصل به این اوردر آیدی
+            for (OrderDetail detail : cart) {
+                detail.setOrderId(orderId);
+                orderDetailDao.save(detail);
+            }
+            System.out.println("\nOrder saved successfully!");
+            // ۳. چاپ خودکار رسید بلافاصله پس از ثبت سفارش طبق نیازمندی داک
+            printReceipt(orderId);
+        } else {
+            System.out.println("Failed to save order due to a database error.");
+        }
     }
 
     public void printReceipt(int orderId) {
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);
+        if (details == null || details.isEmpty()) {
+            System.out.println("No receipt details found for Order ID: " + orderId);
+            return;
+        }
 
-        // TODO:
+        System.out.println("\n[Order Summary / Receipt]");
-        // Print order receipt
+        System.out.println("---------------------------------------");
+        System.out.printf("%-12s %-5s %-9s %-6s\n", "Item", "Qty", "Unit", "Total");
+        System.out.println("---------------------------------------");
 
+        double grandTotal = 0.0;
+        for (OrderDetail detail : details) {
+            MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+            String itemName = (item != null) ? item.getName() : "Unknown";
+            double itemTotal = detail.getPrice() * detail.getQuantity();
+            grandTotal += itemTotal;
+
+            System.out.printf("%-12s %-5d $%-8.2f $%-6.2f\n", itemName, detail.getQuantity(), detail.getPrice(), itemTotal);
+        }
+
+        System.out.println("---------------------------------------");
+        System.out.printf("Final Total: $%-6.2f\n", grandTotal);
     }
 
     public void showOrderHistory(int userId) {
+        List<Order> orders = orderDao.findByUserId(userId);
 
-        // TODO:
+        if (orders == null || orders.isEmpty()) {
-        // Display user's order history
+            System.out.println("\nYou have no past orders.");
+            return;
+        }
 
+        System.out.println("\n=======================================");
+        System.out.println("          📜 ORDER HISTORY 📜          ");
+        System.out.println("=======================================");
+        System.out.printf("%-10s | %-20s | %-12s\n", "Order ID", "Date & Time", "Total Price");
+        System.out.println("---------------------------------------");
+
+        for (Order o : orders) {
+            System.out.printf("%-10d | %-20s | $%-12.2f\n",
+                    o.getId(),
+                    o.getCreatedAt().toString().replace("T", " ").substring(0, 19),
+                    o.getTotalPrice());
+        }
+        System.out.println("=======================================");
     }
-
 }

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

@@ -1,44 +1,116 @@
 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 currentUser = null; // برای مانیتور کردن وضعیت سشن کاربر جاری
 
     public void start() {
-
         while (true) {
+            if (currentUser == null) {
+                // منوی اولیه قبل از لاگین
+                System.out.println();
+                System.out.println("===== 🍕 WELCOME TO JAVA PIZZERIA 🍕 =====");
+                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: ");
 
-            System.out.println();
+                int choice = scanner.nextInt();
-            System.out.println("===== JAVA PIZZERIA =====");
+                scanner.nextLine(); // مصرف کردن کلید اینتر مابقی هدر کلاینت
-            System.out.println("1. Login");
-            System.out.println("2. Register");
-            System.out.println("3. Exit");
 
-            int choice = scanner.nextInt();
+                switch (choice) {
+                    case 1:
+                        handleLogin();
+                        break;
+                    case 2:
+                        handleRegister();
+                        break;
+                    case 3:
+                        System.out.println("Goodbye!");
+                        return;
+                    default:
+                        System.out.println("Invalid choice! Please select a valid number.");
+                }
+            } else {
+                // منوی اصلی سیستم بعد از لاگین موفق کاربر طبق ساختار تمپلت داک
+                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: ");
 
-            switch (choice) {
+                int choice = scanner.nextInt();
-
+                scanner.nextLine();
-                case 1:
-                    // TODO
-                    break;
-
-                case 2:
-                    // TODO
-                    break;
-
-                case 3:
-                    return;
-
-                default:
-                    System.out.println("Invalid choice");
 
+                switch (choice) {
+                    case 1:
+                        menuService.showMenu();
+                        break;
+                    case 2:
+                        orderService.placeOrder(currentUser.getId());
+                        break;
+                    case 3:
+                        orderService.showOrderHistory(currentUser.getId());
+                        break;
+                    case 4:
+                        System.out.println("Logged out successfully.");
+                        currentUser = null; // ریست کردن سشن کابر جاری
+                        break;
+                    default:
+                        System.out.println("Invalid choice! Please select a valid number.");
+                }
             }
-
         }
-
     }
 
+    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("Welcome back, " + currentUser.getUsername() + "!");
+        }
+    }
+
+    private void handleRegister() {
+        System.out.println("\n[Register New Account]");
+        System.out.print("Enter 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("Account created successfully! You can now log in.");
+        } else {
+            System.out.println("Registration failed.");
+        }
+    }
 }