.idea/.gitignore

@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/compiler.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="WS-10-Database" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://maven.devneeds.ir/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="25" project-jdk-type="JavaSDK" />
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

database.sql

@@ -1,141 +1,51 @@
--- Restaurant Database Management System
---
--- Instructions:
--- 1. Create all required tables.
--- 2. Design appropriate PRIMARY KEY and FOREIGN KEY relationships.
--- 3. Add suitable constraints based on the requirements.
--- 4. Insert initial mock data.
--- 5. Insert at least 3 menu items.
--- 6. The script should be executable from start to finish without errors.
+CREATE TABLE users(
+                      id BIGSERIAL PRIMARY KEY,
+                      username VARCHAR(20) NOT NULL UNIQUE,
+                      password_hash VARCHAR(256) NOT NULL,
+                      email VARCHAR(50)
+);
+
+CREATE TABLE menu_items(
+                           id BIGSERIAL PRIMARY KEY,
+                           name VARCHAR(50) NOT NULL,
+                           description  VARCHAR(100),
+                           price DECIMAL NOT NULL CHECK (price > 0),
+                           category VARCHAR(50)
+);
+
+CREATE TABLE customer_orders(
+                                id BIGSERIAL PRIMARY KEY,
+                                user_id BIGINT NOT NULL,
+                                time TIMESTAMP DEFAULT CURRENT_TIMESTAMP ,
+                                total_price DECIMAL(10 , 2),
+                                CONSTRAINT fk_user_id
+                                    FOREIGN KEY (user_id)
+                                        REFERENCES users(id)
+);
 
 
+CREATE TABLE order_details (
+                               id BIGSERIAL PRIMARY KEY,
+                               order_id BIGINT NOT NULL,
+                               menu_item_id BIGINT NOT NULL,
+                               quantity INTEGER NOT NULL CHECK (quantity > 0),
+                               unit_price DECIMAL(10 , 2) NOT NULL,
 
--- =======================================================
--- USER TABLE
--- =======================================================
---
--- Represents customers using the system.
---
--- Required information:
--- - Unique identifier
--- - Username
--- - Password
--- - Email (optional)
---
--- Requirements:
--- - Each user must have a unique identifier.
--- - Usernames must be unique.
--- - Username and password are required.
--- - Passwords should not be stored in plain text.
---
--- CREATE TABLE ...
+                               CONSTRAINT fk_order
+                                   FOREIGN KEY (order_id)
+                                       REFERENCES customer_orders(id) ,
+
+                               CONSTRAINT fk_menu_item
+                                   FOREIGN KEY (menu_item_id)
+                                       REFERENCES menu_items(id)
+
+);
 
 
+INSERT INTO menu_items(name, description ,price, category) VALUES ('Margherita Pizza', 'Classic pizza with tomato and mozzarella', 12.99, 'Pizza'),
+                                                                  ('Pepperoni Pizza', 'Pizza with pepperoni and cheese', 14.99, 'Pizza'),
+                                                                  ('Cheeseburger', 'Beef burger with cheddar cheese', 10.99, 'Burger'),
+                                                                  ('Spaghetti Carbonara', 'Pasta with eggs, cheese, and pancetta', 13.99, 'Pasta'),
+                                                                  ('Coca-Cola', 'Classic carbonated soft drink', 3.99, 'Drink'),
+                                                                  ('Sparkling Water', 'Natural sparkling mineral water', 2.99, 'Drink');
 
--- =======================================================
--- MENU ITEM TABLE
--- =======================================================
---
--- Represents available food and drink items.
---
--- Required information:
--- - Unique identifier
--- - Name
--- - Description (optional)
--- - Price
--- - Category (optional)
---
--- Requirements:
--- - Each menu item must have a unique identifier.
--- - Name is required.
--- - Price must always be positive.
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- ORDER TABLE
--- =======================================================
---
--- Represents orders placed by customers.
---
--- Required information:
--- - Unique identifier
--- - Reference to customer
--- - Creation date and time
--- - Total price
---
--- Requirements:
--- - Each order must belong to exactly one user.
--- - A user can have multiple orders.
--- - The relationship between User and Order must be implemented.
---
--- Note:
--- Avoid using reserved SQL keywords as table names.
--- Consider using a name such as "orders" or "customer_orders".
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- ORDER DETAIL TABLE
--- =======================================================
---
--- Represents items inside an order.
---
--- Required information:
--- - Unique identifier
--- - Reference to an order
--- - Reference to a menu item
--- - Quantity
--- - Item price at purchase time
---
--- Requirements:
--- - Each detail record must belong to one order.
--- - Each detail record must reference one menu item.
--- - Quantity must always be greater than zero.
--- - Store the item's price at the moment of purchase.
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- INITIAL MENU DATA
--- =======================================================
---
--- Insert at least 3 food or drink items.
---
--- Example categories:
--- - Pizza
--- - Burger
--- - Pasta
--- - Drink
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- OPTIONAL TEST DATA
--- =======================================================
---
--- You may insert sample users and orders for testing.
--- This section is optional.
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- VERIFICATION QUERIES
--- =======================================================
---
--- Uncomment these queries to verify your database.
---
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;

pom.xml

@@ -27,6 +27,12 @@
             <version>${postgresql.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.mindrot</groupId>
+            <artifactId>jbcrypt</artifactId>
+            <version>0.4</version>
+        </dependency>
+
     </dependencies>
 
 </project>

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

@@ -1,23 +1,69 @@
 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;
+import org.mindrot.jbcrypt.BCrypt;
+
 public class UserDao {
 
     public boolean save(User user) {
 
-        // TODO:
-        // Insert user into database
+        String hashedPassword = BCrypt.hashpw(user.getPassword(), BCrypt.gensalt());
+        String query ="INSERT INTO users (username, password_hash, email) VALUES (?, ?, ?)";
+
+        try(Connection c = DatabaseConnection.getConnection();
+            PreparedStatement pst = c.prepareStatement(query)) {
+
+            pst.setString(1 , user.getUsername());
+            pst.setString(2 , hashedPassword);
+            pst.setString(3 , user.getEmail());
+
+
+            int result = pst.executeUpdate();
+            if(result==1){
+                return true;
+            }
+
+
+        } catch (SQLException e) {
+            System.out.println(e.getMessage());
+        };
 
         return false;
     }
 
-    public User findByUsername(String username) {
+    public User findByUsername(String userName) {
 
-        // TODO:
-        // Find a user by username
+        String query = "SELECT * FROM users WHERE username = ?";
+
+        try (Connection c = DatabaseConnection.getConnection();
+             PreparedStatement pst = c.prepareStatement(query)) {
+
+            pst.setString(1, userName);
+
+            try (ResultSet rst = pst.executeQuery()) {
+                if (rst.next()) {
+                    User user = new User(rst.getInt("id"),
+                            rst.getString("username"),
+                            rst.getString("password_hash"),
+                            rst.getString("email"));
+                    return user;
+                }
+
+            }
+
+
+        } catch (SQLException e) {
+            System.out.println(e.getMessage());
+        }
 
         return null;
+
     }
 
 }

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

@@ -1,6 +1,7 @@
 package dev.database;
 
 import java.sql.Connection;
+import java.sql.DriverManager;
 import java.sql.SQLException;
 
 public class DatabaseConnection {
@@ -9,19 +10,18 @@ public class DatabaseConnection {
 
     private static final String USER = "postgres"; // Your Username
 
-    private static final String PASSWORD = "password"; // Your Password
+    private static final String PASSWORD = "12345678"; // Your Password
 
     private DatabaseConnection() {
 
     }
 
-    public static Connection getConnection()
-            throws SQLException {
+    public static Connection getConnection() throws SQLException {
 
-        // TODO:
-        // Return a valid PostgreSQL connection
+        Connection con = DriverManager.getConnection(URL , USER , PASSWORD);
 
-        return null;
+
+        return con;
     }
 
 }

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

@@ -3,11 +3,29 @@ package dev.model;
 public class User {
 
     private int id;
-
     private String username;
-
     private String password;
-
     private String email;
 
+
+    public User (int id, String username, String password, String email) {
+        this.id = id;
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+
+    public User (String username, String password, String email) {
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+
+
+    public int getId() { return id; }
+    public String getUsername() { return username; }
+    public String getPassword() { return password; }
+    public String getEmail() { return email; }
+
+
 }

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

@@ -1,23 +1,51 @@
 package dev.service;
 
+import dev.dao.UserDao;
 import dev.model.User;
+import org.mindrot.jbcrypt.BCrypt;
 
 public class AuthService {
 
+    private UserDao userDao = new UserDao();
+
     public boolean register(String username, String password, String email) {
 
-        // TODO:
-        // Validate and register user
+        if(userDao.findByUsername(username) == null){
+            User user = new User (username , password , email);
+            if(userDao.save(user)){
+                System.out.println("successfully register");
+                return true;
+            }else {
+                System.out.println("register failed");
+                return false;
+            }
+        }
+        else {
+            System.out.println("Username already exists.");
+            return false;
+        }
 
-        return false;
     }
 
     public User login(String username, String password) {
 
-        // TODO:
-        // Authenticate user
+        User user = userDao.findByUsername(username);
+
+        if(user == null){
+            System.out.println("Username not found.");
+            return null;
+        }else {
+            String storedHash = user.getPassword();
+
+            if (BCrypt.checkpw(password, storedHash)) {
+                return user;
+
+            } else {
+                System.out.println("Incorrect password.");
+                return null;
+            }
+        }
 
-        return null;
     }
 
 }

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

@@ -1,11 +1,16 @@
 package dev.ui;
 
+import dev.model.User;
+import dev.service.AuthService;
+
 import java.util.Scanner;
 
 public class ConsoleMenu {
 
-    private final Scanner scanner =
-            new Scanner(System.in);
+    private final Scanner scanner = new Scanner(System.in);
+    private final AuthService authService = new AuthService();
+    private User user;
+
 
     public void start() {
 
@@ -16,18 +21,46 @@ public class ConsoleMenu {
             System.out.println("1. Login");
             System.out.println("2. Register");
             System.out.println("3. Exit");
+            System.out.println("======================================= \n" +
+                    "Choose an option: ");
 
             int choice = scanner.nextInt();
 
             switch (choice) {
 
                 case 1:
-                    // TODO
+                {
+                    System.out.println("Enter username:");
+                    String username =scanner.next();
+                    System.out.println("Enter password:");
+                    String password = scanner.next();
+
+                    user = authService.login(username,password);
+
+                    if(user == null){
+                        System.out.println("Try again");
+                    }
+                    else {
+                        System.out.println("Login success");
+
+                    }
+
                     break;
+                }
 
                 case 2:
-                    // TODO
+                {
+                    System.out.println("Enter username:");
+                    String username =scanner.next();
+                    System.out.println("Enter password:");
+                    String password = scanner.next();
+                    System.out.println("Enter email:");
+                    String email = scanner.next();
+
+
+                    authService.register(username,password,email);
                     break;
+                }
 
                 case 3:
                     return;
@@ -39,6 +72,33 @@ public class ConsoleMenu {
 
         }
 
+    }
+
+    public void menu(){
+
+        while (true){
+            System.out.println();
+            System.out.println("========\uD83C\uDF7D\uFE0F MAIN MENU \uD83C\uDF7D\uFE0F========");
+            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("======================================= \n" +
+                    "Choose an option: ");
+
+            int choice = scanner.nextInt();
+
+
+
+        }
+
+
+
+
+
+
+
+
     }
 
 }