develop

.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/dataSources.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="restaurant_db@localhost" uuid="084b5896-6664-4b67-8a51-71034b21913e">
+      <driver-ref>postgresql</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.postgresql.Driver</jdbc-driver>
+      <jdbc-url>jdbc:postgresql://localhost:5432/restaurant_db</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </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="21" project-jdk-type="JavaSDK" />
+</project>

.idea/sqldialects.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="SqlDialectMappings">
+    <file url="file://$PROJECT_DIR$/database.sql" dialect="GenericSQL" />
+    <file url="file://$PROJECT_DIR$/restaurant_db.sql" dialect="GenericSQL" />
+  </component>
+</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

@@ -139,3 +139,137 @@
 -- SELECT * FROM ...;
 -- SELECT * FROM ...;
 -- SELECT * FROM ...;
+
+
+-- =======================================================
+-- Restaurant Database Management System
+-- PostgreSQL Schema
+-- =======================================================
+
+-- -------------------------------------------------------
+-- OPTIONAL CLEANUP
+-- Uncomment if you want to reset the database completely
+-- -------------------------------------------------------
+-- 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
+-- =======================================================
+-- Represents customers using the system.
+-- Requirements:
+-- - Unique identifier
+-- - Unique username
+-- - Required username and password
+-- - Passwords should not be stored in plain text
+CREATE TABLE users (
+                       id SERIAL PRIMARY KEY,
+                       username VARCHAR(100) NOT NULL UNIQUE,
+                       password_hash VARCHAR(255) NOT NULL,
+                       email VARCHAR(255)
+);
+
+-- =======================================================
+-- MENU ITEM TABLE
+-- =======================================================
+-- Represents available food and drink items.
+-- Requirements:
+-- - Unique identifier
+-- - Name required
+-- - Price positive
+CREATE TABLE menu_items (
+                            id SERIAL PRIMARY KEY,
+                            name VARCHAR(150) NOT NULL,
+                            description TEXT,
+                            price DOUBLE PRECISION NOT NULL CHECK (price > 0),
+                            category VARCHAR(100)
+);
+
+-- =======================================================
+-- ORDER TABLE
+-- =======================================================
+-- Represents orders placed by customers.
+-- Requirements:
+-- - Each order belongs to exactly one user
+-- - A user can have multiple orders
+-- - Use non-reserved table name: orders
+CREATE TABLE orders (
+                        id SERIAL PRIMARY KEY,
+                        user_id INT NOT NULL,
+                        created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                        total_price DOUBLE PRECISION NOT NULL DEFAULT 0 CHECK (total_price >= 0),
+                        CONSTRAINT fk_orders_user
+                            FOREIGN KEY (user_id)
+                                REFERENCES users(id)
+                                ON DELETE CASCADE
+);
+
+-- =======================================================
+-- ORDER DETAIL TABLE
+-- =======================================================
+-- Represents items inside an order.
+-- Requirements:
+-- - Each detail belongs to one order
+-- - Each detail references one menu item
+-- - Quantity > 0
+-- - Store item price at purchase time
+CREATE TABLE order_details (
+                               id SERIAL PRIMARY KEY,
+                               order_id INT NOT NULL,
+                               menu_item_id INT NOT NULL,
+                               quantity INT NOT NULL CHECK (quantity > 0),
+                               price DOUBLE PRECISION NOT NULL CHECK (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/drink items
+INSERT INTO menu_items (name, description, price, category) VALUES
+                                                                ('Margherita Pizza', 'Classic pizza with tomato sauce, mozzarella, and basil', 8.99, 'Pizza'),
+                                                                ('Pepperoni Pizza', 'Pizza topped with pepperoni and cheese', 10.99, 'Pizza'),
+                                                                ('Cheeseburger', 'Beef burger with cheddar cheese and lettuce', 7.50, 'Burger'),
+                                                                ('Pasta Carbonara', 'Creamy pasta with bacon and parmesan', 11.50, 'Pasta'),
+                                                                ('Coca Cola', 'Chilled soft drink', 1.50, 'Drink');
+
+-- =======================================================
+-- OPTIONAL TEST DATA
+-- =======================================================
+-- Sample user for testing (password is hashed placeholder)
+INSERT INTO users (username, password_hash, email) VALUES
+    ('testuser', '$2a$10$dummyhashforTestingOnly12345678901234567890', 'testuser@example.com');
+
+-- Sample order for testing
+INSERT INTO orders (user_id, created_at, total_price)
+VALUES (1, CURRENT_TIMESTAMP, 0);
+
+-- Sample order details for testing
+INSERT INTO order_details (order_id, menu_item_id, quantity, price) VALUES
+                                                                        (1, 1, 2, 8.99),
+                                                                        (1, 5, 2, 1.50);
+
+-- Update total price for the sample order
+UPDATE orders
+SET total_price = (
+    SELECT SUM(quantity * price)
+    FROM order_details
+    WHERE order_id = 1
+)
+WHERE id = 1;
+
+-- =======================================================
+-- VERIFICATION QUERIES
+-- =======================================================
+SELECT * FROM users;
+SELECT * FROM menu_items;
+SELECT * FROM orders;
+SELECT * FROM order_details;

pom.xml

@@ -21,6 +21,12 @@
 
     <dependencies>
 
+        <dependency>
+            <groupId>org.mindrot</groupId>
+            <artifactId>jbcrypt</artifactId>
+            <version>0.4</version>
+        </dependency>
+
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>

restaurant_db.sql

@@ -0,0 +1,110 @@
+CREATE TABLE users (
+                       id SERIAL PRIMARY KEY,
+                       username VARCHAR(100) NOT NULL UNIQUE,
+                       password_hash VARCHAR(255) NOT NULL,
+                       email VARCHAR(255)
+);
+
+-- =======================================================
+-- MENU ITEM TABLE
+-- =======================================================
+-- Represents available food and drink items.
+-- Requirements:
+-- - Unique identifier
+-- - Name required
+-- - Price positive
+CREATE TABLE menu_items (
+                            id SERIAL PRIMARY KEY,
+                            name VARCHAR(150) NOT NULL,
+                            description TEXT,
+                            price DOUBLE PRECISION NOT NULL CHECK (price > 0),
+                            category VARCHAR(100)
+);
+
+-- =======================================================
+-- ORDER TABLE
+-- =======================================================
+-- Represents orders placed by customers.
+-- Requirements:
+-- - Each order belongs to exactly one user
+-- - A user can have multiple orders
+-- - Use non-reserved table name: orders
+CREATE TABLE orders (
+                        id SERIAL PRIMARY KEY,
+                        user_id INT NOT NULL,
+                        created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                        total_price DOUBLE PRECISION NOT NULL DEFAULT 0 CHECK (total_price >= 0),
+                        CONSTRAINT fk_orders_user
+                            FOREIGN KEY (user_id)
+                                REFERENCES users(id)
+                                ON DELETE CASCADE
+);
+
+-- =======================================================
+-- ORDER DETAIL TABLE
+-- =======================================================
+-- Represents items inside an order.
+-- Requirements:
+-- - Each detail belongs to one order
+-- - Each detail references one menu item
+-- - Quantity > 0
+-- - Store item price at purchase time
+CREATE TABLE order_details (
+                               id SERIAL PRIMARY KEY,
+                               order_id INT NOT NULL,
+                               menu_item_id INT NOT NULL,
+                               quantity INT NOT NULL CHECK (quantity > 0),
+                               price DOUBLE PRECISION NOT NULL CHECK (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)
+                                       ON DELETE RESTRICT
+);
+
+-- =======================================================
+-- INITIAL MENU DATA
+-- =======================================================
+-- Insert at least 3 food/drink items
+INSERT INTO menu_items (name, description, price, category) VALUES
+                                                                ('Margherita Pizza', 'Classic pizza with tomato sauce, mozzarella, and basil', 8.99, 'Pizza'),
+                                                                ('Pepperoni Pizza', 'Pizza topped with pepperoni and cheese', 10.99, 'Pizza'),
+                                                                ('Cheeseburger', 'Beef burger with cheddar cheese and lettuce', 7.50, 'Burger'),
+                                                                ('Pasta Carbonara', 'Creamy pasta with bacon and parmesan', 11.50, 'Pasta'),
+                                                                ('Coca Cola', 'Chilled soft drink', 1.50, 'Drink');
+
+-- =======================================================
+-- OPTIONAL TEST DATA
+-- =======================================================
+-- Sample user for testing (password is hashed placeholder)
+INSERT INTO users (username, password_hash, email) VALUES
+    ('testuser', '$2a$10$dummyhashforTestingOnly12345678901234567890', 'testuser@example.com');
+
+-- Sample order for testing
+INSERT INTO orders (user_id, created_at, total_price)
+VALUES (1, CURRENT_TIMESTAMP, 0);
+
+-- Sample order details for testing
+INSERT INTO order_details (order_id, menu_item_id, quantity, price) VALUES
+                                                                        (1, 1, 2, 8.99),
+                                                                        (1, 5, 2, 1.50);
+
+-- Update total price for the sample order
+UPDATE orders
+SET total_price = (
+    SELECT SUM(quantity * price)
+    FROM order_details
+    WHERE order_id = 1
+)
+WHERE id = 1;
+
+-- =======================================================
+-- VERIFICATION QUERIES
+-- =======================================================
+SELECT * FROM users;
+SELECT * FROM menu_items;
+SELECT * FROM orders;
+SELECT * FROM order_details;

src/main/java/dev/Main.java

@@ -1,12 +1,21 @@
 package dev;
 
 import dev.ui.ConsoleMenu;
+import dev.service.AuthService;
+import dev.service.MenuService;
+import dev.service.OrderService;
 
-public class Main {
+public class Main
+{
 
-    public static void main(String[] args) {
+    public static void main(String[] args)
+    {
         
-        ConsoleMenu menu = new ConsoleMenu();
+        AuthService authService = new AuthService();
+        MenuService menuService = new MenuService();
+        OrderService orderService = new OrderService();
+
+        ConsoleMenu menu = new ConsoleMenu(authService, menuService, orderService);
         menu.start();
 
     }

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

@@ -1,24 +1,73 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.MenuItem;
-
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
-public class MenuItemDao {
+public class MenuItemDao
+{
 
-    public List<MenuItem> findAll() {
+    public List<MenuItem> findAll()
+    {
 
-        // TODO:
-        // Retrieve all menu items
 
-        return null;
+        String sql = "SELECT * FROM menu_items";
+        List<MenuItem> items = new ArrayList<>();
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement pstmt = conn.prepareStatement(sql);
+             ResultSet rs = pstmt.executeQuery())
+        {
+
+            while (rs.next())
+            {
+                items.add(new MenuItem(
+                        rs.getInt("id"),
+                        rs.getString("name"),
+                        rs.getString("description"),
+                        rs.getDouble("price"),
+                        rs.getString("category")
+                ));
+            }
+        }
+        catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
+
+        return items;
     }
 
-    public MenuItem findById(int id) {
+    public MenuItem findById(int id)
+    {
+        String sql = "SELECT * FROM menu_items WHERE id = ?";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Find menu item by id
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
 
+            pstmt.setInt(1, id);
+
+            try (ResultSet rs = pstmt.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)
+        {
+            e.printStackTrace();
+        }
         return null;
     }
 

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

@@ -1,25 +1,92 @@
 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 class OrderDao
+{
 
-    public int save(Order order) {
+    public int save(Order order)
+    {
+        String sql = "INSERT INTO orders (user_id, created_at, total_price) VALUES (?, ?, ?)";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Insert order and return generated id
+             PreparedStatement pstmt = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS))
+        {
 
+            pstmt.setInt(1, order.getUserId());
+            pstmt.setTimestamp(2, Timestamp.valueOf(order.getCreatedAt()));
+            pstmt.setDouble(3, order.getTotalPrice());
+
+            int affectedRows = pstmt.executeUpdate();
+            if (affectedRows == 0) return -1;
+
+            try (ResultSet generatedKeys = pstmt.getGeneratedKeys())
+            {
+                if (generatedKeys.next())
+                {
+                    return generatedKeys.getInt(1);
+                }
+            }
+        }
+        catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
         return -1;
     }
 
-    public List<Order> findByUserId(int userId) {
+    public List<Order> findByUserId(int userId)
+    {
+        List<Order> orders = new ArrayList<>();
+        String sql = "SELECT * FROM orders WHERE user_id = ? ORDER BY created_at DESC";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve all orders of a user
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
 
-        return null;
+            pstmt.setInt(1, userId);
+            ResultSet rs = pstmt.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 (SQLException e)
+        {
+            e.printStackTrace();
+        }
+        return orders;
     }
 
+    public void updateTotalPrice(int orderId, double totalPrice)
+    {
+        String sql = "UPDATE orders SET total_price = ? WHERE id = ?";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
+
+            pstmt.setDouble(1, totalPrice);
+            pstmt.setInt(2, orderId);
+            pstmt.executeUpdate();
+
+        }
+        catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
+    }
 }
+

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

@@ -1,24 +1,82 @@
 package dev.dao;
 
 import dev.model.OrderDetail;
+import dev.database.DatabaseConnection;
+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) {
+public class OrderDetailDao
+{
+
+    public void save(OrderDetail detail)
+    {
 
         // TODO:
         // Insert order detail
 
+        String sql = "INSERT INTO order_details (order_id, menu_item_id, quantity, price) VALUES (?, ?, ?, ?)";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
+
+            pstmt.setInt(1, detail.getOrderId());
+            pstmt.setInt(2, detail.getMenuItemId());
+            pstmt.setInt(3, detail.getQuantity());
+            pstmt.setDouble(4, detail.getPrice());
+
+            pstmt.executeUpdate();
+        }
+        catch (SQLException e)
+        {
+            System.err.println("Error saving order detail: " + e.getMessage());
+        }
+
     }
 
-    public List<OrderDetail> findByOrderId(int orderId) {
+    public List<OrderDetail> findByOrderId(int orderId)
+    {
 
         // TODO:
+
         // Retrieve order details
 
-        return null;
+        String sql = "SELECT * FROM order_details WHERE order_id = ?";
+        List<OrderDetail> details = new ArrayList<>();
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
+
+            pstmt.setInt(1, orderId);
+
+            try (ResultSet rs = pstmt.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("price")
+                    );
+                    details.add(detail);
+                }
+            }
+        }
+        catch (SQLException e)
+        {
+            System.err.println("Error finding order details: " + e.getMessage());
+        }
+
+        return details;
     }
 
 }

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

@@ -2,21 +2,70 @@ package dev.dao;
 
 import dev.model.User;
 
-public class UserDao {
+import dev.database.DatabaseConnection;
 
-    public boolean save(User user) {
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
 
-        // TODO:
+public class UserDao
-        // Insert user into database
+{
+
+    public boolean save(User user)
+    {
+
+        String sql = "INSERT INTO users (username, password_hash) VALUES (?, ?)";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
+
+            pstmt.setString(1, user.getUsername());
+            pstmt.setString(2, user.getPasswordHash());
+
+            int affectedRows = pstmt.executeUpdate();
+            return affectedRows > 0;
+
+        }
+        catch (SQLException e)
+        {
+            e.printStackTrace();
+            return false;
+        }
 
-        return false;
     }
 
-    public User findByUsername(String username) {
+    public User findByUsername(String username)
+    {
+        String sql = "SELECT * FROM users WHERE username = ?";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Find a user by username
+             PreparedStatement pstmt = conn.prepareStatement(sql))
+        {
 
+            pstmt.setString(1, username);
+
+            try (ResultSet rs = pstmt.executeQuery())
+            {
+                if (rs.next())
+                {
+                    User user = new User();
+
+                    user.setId(rs.getInt("id"));
+                    user.setUsername(rs.getString("username"));
+                    user.setPasswordHash(rs.getString("password_hash"));
+
+                    user.setEmail(rs.getString("email"));
+
+                    return user;
+                }
+            }
+        }
+        catch (SQLException e)
+        {
+            e.printStackTrace();
+        }
         return null;
     }
 

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

@@ -2,14 +2,16 @@ package dev.database;
 
 import java.sql.Connection;
 import java.sql.SQLException;
+import java.sql.DriverManager;
 
-public class DatabaseConnection {
+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 = "Sa123456*";
 
     private DatabaseConnection() {
 
@@ -18,10 +20,8 @@ public class DatabaseConnection {
     public static Connection getConnection()
             throws SQLException {
 
-        // TODO:
-        // Return a valid PostgreSQL connection
 
-        return null;
+        return DriverManager.getConnection(URL, USER, PASSWORD);
+
     }
-
 }

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

@@ -1,6 +1,7 @@
 package dev.model;
 
-public class MenuItem {
+public class MenuItem
+{
 
     private int id;
 
@@ -12,4 +13,75 @@ public class MenuItem {
 
     private String category;
 
+
+    public MenuItem() {}
+
+    public MenuItem(int id, String name, String description, double price, String category)
+    {
+        this.id = id;
+        this.name = name;
+        this.description = description;
+        this.price = price;
+        this.category = category;
+    }
+
+    public int getId()
+    {
+        return id;
+    }
+
+    public String getName()
+    {
+        return name;
+    }
+
+    public String getDescription()
+    {
+        return description;
+    }
+
+    public double getPrice()
+    {
+        return price;
+    }
+
+    public String getCategory()
+    {
+        return category;
+    }
+
+    public void setId(int id)
+    {
+        this.id = id;
+    }
+
+    public void setName(String name)
+    {
+        this.name = name;
+    }
+
+    public void setDescription(String description)
+    {
+        this.description = description;
+    }
+
+    public void setPrice(double price)
+    {
+        this.price = price;
+    }
+
+    public void setCategory(String category)
+    {
+        this.category = category;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "MenuItem{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", price=" + price +
+                '}';
+    }
 }

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

@@ -2,14 +2,79 @@ package dev.model;
 
 import java.time.LocalDateTime;
 
-public class Order {
+public class Order
+{
 
     private int id;
-
     private int userId;
-
     private LocalDateTime createdAt;
-
     private double totalPrice;
 
+    public Order() {}
+
+    public Order(int userId, double totalPrice)
+    {
+        this.userId = userId;
+        this.createdAt = LocalDateTime.now();
+        this.totalPrice = totalPrice;
+    }
+
+    public Order(int id, int userId, LocalDateTime createdAt, double totalPrice)
+    {
+        this.id = id;
+        this.userId = userId;
+        this.createdAt = createdAt;
+        this.totalPrice = totalPrice;
+    }
+
+    public int getId()
+    {
+        return id;
+    }
+
+    public void setId(int id)
+    {
+        this.id = id;
+    }
+
+    public int getUserId()
+    {
+        return userId;
+    }
+
+    public void setUserId(int userId)
+    {
+        this.userId = userId;
+    }
+
+    public LocalDateTime getCreatedAt()
+    {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt)
+    {
+        this.createdAt = createdAt;
+    }
+
+    public double getTotalPrice()
+    {
+        return totalPrice;
+    }
+
+    public void setTotalPrice(double totalPrice)
+    {
+        this.totalPrice = totalPrice;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "Order{" +
+                "id=" + id +
+                ", userId=" + userId +
+                ", createdAt=" + createdAt +
+                ", totalPrice=" + totalPrice +
+                '}';
+    }
 }

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

@@ -1,15 +1,92 @@
 package dev.model;
 
-public class OrderDetail {
+public class OrderDetail
+{
 
     private int id;
-
     private int orderId;
-
     private int menuItemId;
-
     private int quantity;
-
     private double price;
 
+    public OrderDetail() {}
+
+    public OrderDetail(int orderId, int menuItemId, int quantity, double price)
+    {
+        this.orderId = orderId;
+        this.menuItemId = menuItemId;
+        this.quantity = quantity;
+        this.price = price;
+    }
+
+    public OrderDetail(int id, int orderId, int menuItemId, int quantity, double price)
+    {
+        this.id = id;
+        this.orderId = orderId;
+        this.menuItemId = menuItemId;
+        this.quantity = quantity;
+        this.price = price;
+    }
+
+    public int getId()
+    {
+        return id;
+    }
+
+    public void setId(int id)
+    {
+        this.id = id;
+    }
+
+    public int getOrderId()
+    {
+        return orderId;
+    }
+
+    public void setOrderId(int orderId)
+    {
+        this.orderId = orderId;
+    }
+
+    public int getMenuItemId()
+    {
+        return menuItemId;
+    }
+
+    public void setMenuItemId(int menuItemId)
+    {
+        this.menuItemId = menuItemId;
+    }
+
+    public int getQuantity()
+    {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity)
+    {
+        this.quantity = quantity;
+    }
+
+    public double getPrice()
+    {
+        return price;
+    }
+
+    public void setPrice(double price)
+    {
+        this.price = price;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "OrderDetail{" +
+                "id=" + id +
+                ", orderId=" + orderId +
+                ", menuItemId=" + menuItemId +
+                ", quantity=" + quantity +
+                ", price=" + price +
+                '}';
+    }
 }

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

@@ -1,13 +1,82 @@
 package dev.model;
 
-public class User {
+public class User
+{
 
     private int id;
 
     private String username;
 
-    private String password;
+    private String passwordHash;
 
     private String email;
 
+    public User() {}
+
+
+    public User(String username, String passwordHash, String email)
+    {
+        this.username = username;
+        this.passwordHash = passwordHash;
+        this.email = email;
+    }
+
+    public User(int id, String username, String passwordHash, String email)
+    {
+        this.id = id;
+        this.username = username;
+        this.passwordHash = passwordHash;
+        this.email = email;
+    }
+
+    public int getId()
+    {
+        return id;
+    }
+
+    public void setId(int id)
+    {
+        this.id = id;
+    }
+
+    public String getUsername()
+    {
+        return username;
+    }
+
+    public void setUsername(String username)
+    {
+        this.username = username;
+    }
+
+    public String getPasswordHash()
+    {
+        return passwordHash;
+    }
+
+    public void setPasswordHash(String passwordHash)
+    {
+        this.passwordHash = passwordHash;
+    }
+
+    public String getEmail()
+    {
+        return email;
+    }
+
+    public void setEmail(String email)
+    {
+        this.email = email;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "User{" +
+                "id=" + id +
+                ", username='" + username + '\'' +
+                ", email='" + email + '\'' +
+                '}';
+    }
+
 }

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

@@ -1,23 +1,49 @@
 package dev.service;
 
+import dev.dao.UserDao;
 import dev.model.User;
+import org.mindrot.jbcrypt.BCrypt;
 
-public class AuthService {
+public class AuthService
+{
+    private final UserDao userDao = new UserDao();
 
-    public boolean register(String username, String password, String email) {
+    public boolean register(String username, String password, String email)
+    {
 
-        // TODO:
-        // Validate and register user
 
-        return false;
+        if (username == null || username.isBlank()) return false;
+        if (password == null || password.isBlank()) return false;
+
+        if (email == null || email.isBlank()) return false;
+
+        User existing = userDao.findByUsername(username.trim());
+        if (existing != null) return false;
+
+        String passwordHash = BCrypt.hashpw(password, BCrypt.gensalt(12));
+
+        User user = new User();
+        user.setUsername(username.trim());
+        user.setPasswordHash(passwordHash);
+
+        user.setEmail(email.trim());
+
+        return userDao.save(user);
+
     }
 
-    public User login(String username, String password) {
+    public User login(String username, String password)
+    {
 
-        // TODO:
+        if (username == null || username.isBlank()) return null;
-        // Authenticate user
+        if (password == null || password.isBlank()) return null;
+
+        User user = userDao.findByUsername(username.trim());
+        if (user == null) return null;
+
+        boolean ok = BCrypt.checkpw(password, user.getPasswordHash());
+        return ok ? user : null;
 
-        return null;
     }
 
 }

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

@@ -1,12 +1,38 @@
 package dev.service;
 
-public class MenuService {
+import dev.dao.MenuItemDao;
+import dev.model.MenuItem;
+import dev.ui.ConsoleStyle;
+import java.util.List;
 
-    public void showMenu() {
+public class MenuService
+{
 
-        // TODO:
+    private final MenuItemDao menuItemDao = new MenuItemDao();
-        // Display menu items
 
+    public void showMenu()
+    {
+        List<MenuItem> menuItems = menuItemDao.findAll();
+
+        if (menuItems == null || menuItems.isEmpty())
+        {
+            ConsoleStyle.printError("No menu items available.");
+            return;
+        }
+
+        ConsoleStyle.printHeader("📋 MENU ITEMS");
+        System.out.printf("%-5s %-25s %-10s %-15s%n", "ID", "Name", "Price", "Category");
+        ConsoleStyle.printLine();
+
+        for (MenuItem item : menuItems)
+        {
+            System.out.printf(
+                    "%-5d %-25s $%-9.2f %-15s%n",
+                    item.getId(),
+                    item.getName(),
+                    item.getPrice(),
+                    item.getCategory() == null ? "-" : item.getCategory()
+            );
+        }
     }
-
 }

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

@@ -1,26 +1,147 @@
 package dev.service;
 
-public class OrderService {
+import dev.dao.MenuItemDao;
+import dev.dao.OrderDao;
+import dev.dao.OrderDetailDao;
+import dev.model.Order;
+import dev.model.OrderDetail;
+import dev.model.MenuItem;
+import dev.ui.ConsoleStyle;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Scanner;
 
-    public void placeOrder(int userId) {
+public class OrderService
+{
 
-        // TODO:
+    private final OrderDao orderDao = new OrderDao();
-        // Create order
+    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)
+    {
+        System.out.println("\n--- Create New Order ---");
+
+        Order order = new Order();
+        order.setUserId(userId);
+        order.setCreatedAt(LocalDateTime.now());
+        order.setTotalPrice(0.0);
+
+        int orderId = orderDao.save(order);
+
+        if (orderId == -1)
+        {
+            System.out.println("Failed to create order.");
+            return;
+        }
+
+        double total = 0;
+        List<OrderDetail> details = new java.util.ArrayList<>();
+
+        while (true)
+        {
+            System.out.print("Enter Menu Item ID (or 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.print("Quantity for " + item.getName() + ": ");
+            int quantity = scanner.nextInt();
+
+            OrderDetail detail = new OrderDetail();
+            detail.setOrderId(orderId);
+            detail.setMenuItemId(itemId);
+            detail.setQuantity(quantity);
+            detail.setPrice(item.getPrice());
+
+            orderDetailDao.save(detail);
+            details.add(detail);
+
+            total += (item.getPrice() * quantity);
+            System.out.println("Added: " + item.getName() + " x" + quantity);
+        }
+
+        order.setId(orderId);
+        order.setTotalPrice(total);
+        orderDao.updateTotalPrice(orderId, total);
+
+        System.out.println("Order #" + orderId + " placed successfully. Total: $" + total);
+
+        printReceipt(order, details);
     }
 
-    public void printReceipt(int orderId) {
+    private void printReceipt(Order order, List<OrderDetail> details)
+    {
+        ConsoleStyle.printHeader("🧾 RECEIPT ");
 
-        // TODO:
+        System.out.println("Order ID: " + order.getId());
-        // Print order receipt
+        System.out.println("Date    : " + order.getCreatedAt().toString().replace("T", " "));
+        ConsoleStyle.printLine();
 
+        System.out.printf("%-20s %-8s %-12s %-12s%n", "Item Name", "Qty", "Unit Price", "Total");
+        ConsoleStyle.printLine();
+
+        for (OrderDetail detail : details)
+        {
+            MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+            String itemName = (item != null) ? item.getName() : "Item #" + detail.getMenuItemId();
+
+            double lineTotal = detail.getQuantity() * detail.getPrice();
+
+            System.out.printf(
+                    "%-20s %-8d $%-11.2f $%-11.2f%n",
+                    itemName,
+                    detail.getQuantity(),
+                    detail.getPrice(),
+                    lineTotal
+            );
+        }
+
+        ConsoleStyle.printLine();
+        System.out.printf("%-42s $%.2f%n", "Grand Total:", order.getTotalPrice());
+        ConsoleStyle.printLine();
     }
 
-    public void showOrderHistory(int userId) {
+    public void showOrderHistory(int userId)
+    {
+        System.out.println("\n--- 📜 Order History (Detailed) ---");
+        List<Order> history = orderDao.findByUserId(userId);
 
-        // TODO:
+        if (history.isEmpty())
-        // Display user's order history
+        {
+            System.out.println("You have no previous orders.");
+            return;
+        }
 
+        for (Order o : history) {
+            System.out.println("==========================================");
+            System.out.printf("ORDER ID: %-5d | Date: %s\n", o.getId(), o.getCreatedAt().toString().replace("T", " "));
+            System.out.println("Items:");
+
+            List<OrderDetail> details = orderDetailDao.findByOrderId(o.getId());
+
+            for (OrderDetail detail : details)
+            {
+                MenuItem item = menuItemDao.findById(detail.getMenuItemId());
+                String itemName = (item != null) ? item.getName() : "Unknown Item";
+
+                System.out.printf("   - %-20s x%-3d ($%.2f)\n", itemName, detail.getQuantity(), detail.getPrice());
+            }
+
+            System.out.printf("TOTAL: $%.2f\n", o.getTotalPrice());
+        }
+        System.out.println("==========================================");
     }
 
 }

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

@@ -1,44 +1,155 @@
 package dev.ui;
 
+import dev.model.User;
+import dev.service.AuthService;
+import dev.service.OrderService;
+import dev.service.MenuService;
+
 import java.util.Scanner;
 
-public class ConsoleMenu {
+public class ConsoleMenu
+{
 
-    private final Scanner scanner =
+    private final AuthService authService;
-            new Scanner(System.in);
+    private final MenuService menuService;
-
+    private final OrderService orderService;
-    public void start() {
+    private final Scanner scanner;
-
+    private User currentUser;
-        while (true) {
-
-            System.out.println();
-            System.out.println("===== JAVA PIZZERIA =====");
-            System.out.println("1. Login");
-            System.out.println("2. Register");
-            System.out.println("3. Exit");
-
-            int choice = scanner.nextInt();
-
-            switch (choice) {
-
-                case 1:
-                    // TODO
-                    break;
-
-                case 2:
-                    // TODO
-                    break;
-
-                case 3:
-                    return;
-
-                default:
-                    System.out.println("Invalid choice");
-
-            }
-
-        }
 
+    public ConsoleMenu(AuthService authService, MenuService menuService, OrderService orderService)
+    {
+        this.authService = authService;
+        this.menuService = menuService;
+        this.orderService = orderService;
+        this.scanner = new Scanner(System.in);
     }
 
+    public void start()
+    {
+        while (true)
+        {
+            if (currentUser == null)
+            {
+                showGuestMenu();
+            }
+            else
+            {
+                showUserMenu();
+            }
+        }
+    }
+
+    private void showGuestMenu()
+    {
+        ConsoleStyle.printHeader("🍕 WELCOME TO JAVA PIZZERIA 🍕");
+        System.out.println("1. Login");
+        System.out.println("2. Register New Account");
+        System.out.println("3. Exit");
+        ConsoleStyle.printLine();
+        System.out.print("Choose an option: ");
+
+        String input = scanner.nextLine().trim();
+
+        switch (input)
+        {
+            case "1":
+                handleLogin();
+                break;
+
+            case "2":
+                handleRegister();
+                break;
+
+            case "3":
+                ConsoleStyle.printInfo("Goodbye! See you soon.");
+                System.exit(0);
+                break;
+
+            default:
+                System.out.println("Invalid choice.");
+        }
+    }
+
+    private void showUserMenu()
+    {
+        ConsoleStyle.printHeader("🍽️ MAIN MENU - Welcome, " + currentUser.getUsername() + " 🍽️");
+        System.out.println("1. View Menu");
+        System.out.println("2. Place New Order");
+        System.out.println("3. View Order History");
+        System.out.println("4. Logout");
+        System.out.println("5. Exit");
+        ConsoleStyle.printLine();
+        System.out.print("Choose an option: ");
+
+        String input = scanner.nextLine().trim();
+
+        switch (input)
+        {
+            case "1"->
+                menuService.showMenu();
+
+            case "2"->
+                orderService.placeOrder(currentUser.getId());
+
+            case "3" ->
+                orderService.showOrderHistory(currentUser.getId());
+            case "4"->{
+                currentUser = null;
+                ConsoleStyle.printSuccess("Logged out successfully.");
+            }
+            case "5"->{
+                ConsoleStyle.printInfo("Goodbye! See you soon.");
+                System.exit(0);
+            }
+            default->
+                    ConsoleStyle.printError("Invalid choice.");
+        }
+    }
+
+    private void handleLogin()
+    {
+        System.out.println("\n--- Login ---");
+        System.out.print("Username: ");
+        String username = scanner.nextLine().trim();
+
+        System.out.print("Password: ");
+        String password = scanner.nextLine();
+
+        User user = authService.login(username, password);
+
+        if (user != null)
+        {
+            currentUser = user;
+            ConsoleStyle.printSuccess("Login successful! Welcome back, " + user.getUsername() + ".");
+        }
+        else
+        {
+            ConsoleStyle.printError("Invalid username or password.");
+        }
+    }
+
+    private void handleRegister()
+    {
+        System.out.println("\n--- Register ---");
+        System.out.print("Enter username: ");
+        String username = scanner.nextLine().trim();
+
+        System.out.print("Enter password: ");
+        String password = scanner.nextLine();
+
+        System.out.print("Enter email: ");
+        String email = scanner.nextLine().trim();
+
+        boolean success = authService.register(username, password, email);
+
+        if (success)
+        {
+            ConsoleStyle.printSuccess("Registration successful! You can now login.");
+        }
+        else
+        {
+            ConsoleStyle.printError("Registration failed. Username might be taken.");
+        }
+    }
 }
+

src/main/java/dev/ui/ConsoleStyle.java

@@ -0,0 +1,38 @@
+package dev.ui;
+
+public class ConsoleStyle
+{
+    public static final String RESET = "\u001B[0m";
+    public static final String BOLD = "\u001B[1m";
+    public static final String RED = "\u001B[31m";
+    public static final String GREEN = "\u001B[32m";
+    public static final String YELLOW = "\u001B[33m";
+    public static final String BLUE = "\u001B[34m";
+    public static final String CYAN = "\u001B[36m";
+
+    public static void printHeader(String title) {
+        System.out.println(CYAN + "===============================================" + RESET);
+        System.out.println(CYAN + BOLD + "  " + title + RESET);
+        System.out.println(CYAN + "===============================================" + RESET);
+    }
+
+
+    public static void printSuccess(String message)
+    {
+        System.out.println(GREEN + "✔ " + message + RESET);
+    }
+
+    public static void printError(String message)
+    {
+        System.out.println(RED + "✘ " + message + RESET);
+    }
+
+    public static void printInfo(String message) {
+        System.out.println(YELLOW + "ℹ " + message + RESET);
+    }
+
+    public static void printLine()
+    {
+        System.out.println(CYAN + "-----------------------------------------------" + RESET);
+    }
+}