resolve

src/main/java/mate/academy/Main.java

@@ -2,17 +2,27 @@
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import mate.academy.lib.Injector;
 import mate.academy.model.CinemaHall;
 import mate.academy.model.Movie;
 import mate.academy.model.MovieSession;
+import mate.academy.security.AuthenticationService;
 import mate.academy.service.CinemaHallService;
 import mate.academy.service.MovieService;
 import mate.academy.service.MovieSessionService;
 
 public class Main {
-    public static void main(String[] args) {
-        MovieService movieService = null;
+    public static final Injector injector = Injector.getInstance("mate.academy");
+    private static final MovieService movieService =
+            (MovieService) injector.getInstance(MovieService.class);
+    private static final MovieSessionService movieSessionService =
+            (MovieSessionService) injector.getInstance(MovieSessionService.class);
+    private static final CinemaHallService cinemaHallService =
+            (CinemaHallService) injector.getInstance(CinemaHallService.class);
+    private static final AuthenticationService authenticationService =
+            (AuthenticationService) injector.getInstance(AuthenticationService.class);
 
+    public static void main(String[] args) {
         Movie fastAndFurious = new Movie("Fast and Furious");
         fastAndFurious.setDescription("An action film about street racing, heists, and spies.");
         movieService.add(fastAndFurious);

src/main/java/mate/academy/dao/UserDao.java

@@ -0,0 +1,12 @@
+package mate.academy.dao;
+
+import java.util.Optional;
+import mate.academy.model.User;
+
+public interface UserDao {
+    User add(User user);
+
+    User get(Long id);
+
+    Optional<User> findByEmail(String email);
+}

src/main/java/mate/academy/dao/impl/UserDaoImpl.java

@@ -0,0 +1,54 @@
+package mate.academy.dao.impl;
+
+import java.util.Optional;
+import mate.academy.dao.UserDao;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.model.User;
+import mate.academy.util.HibernateUtil;
+import org.hibernate.HibernateException;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+
+public class UserDaoImpl implements UserDao {
+    @Override
+    public User add(User user) {
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = HibernateUtil.getSessionFactory().openSession();
+            transaction = session.beginTransaction();
+            session.persist(user);
+            transaction.commit();
+            return user;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new DataProcessingException("can't save user to db" + user, e);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+    }
+
+    @Override
+    public User get(Long id) {
+        try (Session session = HibernateUtil.getSessionFactory().openSession()) {
+            return session.get(User.class, id);
+        } catch (Exception e) {
+            throw new DataProcessingException("can't get user by id:" + id, e);
+        }
+    }
+
+    @Override
+    public Optional<User> findByEmail(String email) {
+        try (Session session = HibernateUtil.getSessionFactory().openSession()) {
+            return session.createQuery("FROM User u where u.email = :email", User.class)
+                    .setParameter("email", email)
+                    .uniqueResultOptional();
+        } catch (HibernateException e) {
+            throw new DataProcessingException("can't find user by email " + email, e);
+        }
+    }
+}

src/main/java/mate/academy/exception/AuthenticationException.java

@@ -0,0 +1,7 @@
+package mate.academy.exception;
+
+public class AuthenticationException extends RuntimeException {
+    public AuthenticationException(String message) {
+        super(message);
+    }
+}

src/main/java/mate/academy/exception/RegistrationException.java

@@ -0,0 +1,7 @@
+package mate.academy.exception;
+
+public class RegistrationException extends RuntimeException {
+    public RegistrationException(String message) {
+        super(message);
+    }
+}

src/main/java/mate/academy/model/User.java

@@ -0,0 +1,68 @@
+package mate.academy.model;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "users")
+public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    @Column(unique = true)
+    private String email;
+    private String password;
+    private byte[] salt;
+
+    public User() {
+    }
+
+    public User(String email, String password) {
+        this.email = email;
+        this.password = password;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public byte[] getSalt() {
+        return salt;
+    }
+
+    public void setSalt(byte[] salt) {
+        this.salt = salt;
+    }
+
+    @Override
+    public String toString() {
+        return "User{"
+                + "id=" + id
+                + ", email=" + email + '\''
+                + '}';
+    }
+}

src/main/java/mate/academy/security/AuthenticationService.java

@@ -0,0 +1,17 @@
+package mate.academy.security;
+
+import mate.academy.exception.AuthenticationException;
+import mate.academy.exception.RegistrationException;
+import mate.academy.model.User;
+
+public interface AuthenticationService {
+    User login(String email, String password) throws AuthenticationException;
+
+    /**
+     * We should register a new user. The new user entity will contain the email and password
+     * @param email - user email. should be unique for each user
+     * @param password - user password
+     * @return new user instance
+     */
+    User register(String email, String password) throws RegistrationException;
+}

src/main/java/mate/academy/security/AuthenticationServiceImpl.java

@@ -0,0 +1,39 @@
+package mate.academy.security;
+
+import java.util.Optional;
+import mate.academy.exception.AuthenticationException;
+import mate.academy.exception.RegistrationException;
+import mate.academy.lib.Inject;
+import mate.academy.lib.Service;
+import mate.academy.model.User;
+import mate.academy.service.UserService;
+import mate.academy.util.HashUtil;
+
+@Service
+public class AuthenticationServiceImpl implements AuthenticationService {
+    @Inject
+    private UserService userService;
+
+    @Override
+    public User login(String email, String password) throws AuthenticationException {
+        Optional<User> userFromDbOptional = userService.findByEmail(email);
+        if (userFromDbOptional.isEmpty()) {
+            throw new AuthenticationException("Can't authenticate user " + email);
+        }
+        User user = userFromDbOptional.get();
+        String hashedPassword = HashUtil.hashPassword(password, user.getSalt());
+        if (user.getPassword().equals(hashedPassword)) {
+            return user;
+        }
+        throw new AuthenticationException("Login or password is incorrect...");
+    }
+
+    @Override
+    public User register(String email, String password) throws RegistrationException {
+        Optional<User> userFromDb = userService.findByEmail(email);
+        if (userFromDb.isPresent() || email.isEmpty() || password.isEmpty()) {
+            throw new RegistrationException("This email is already taken :" + email);
+        }
+        return userService.add(new User(email, password));
+    }
+}

src/main/java/mate/academy/service/UserService.java

@@ -0,0 +1,10 @@
+package mate.academy.service;
+
+import java.util.Optional;
+import mate.academy.model.User;
+
+public interface UserService {
+    User add(User user);
+
+    Optional<User> findByEmail(String email);
+}

src/main/java/mate/academy/service/impl/UserServiceImpl.java

@@ -0,0 +1,22 @@
+package mate.academy.service.impl;
+
+import java.util.Optional;
+import mate.academy.dao.UserDao;
+import mate.academy.lib.Inject;
+import mate.academy.model.User;
+import mate.academy.service.UserService;
+
+public class UserServiceImpl implements UserService {
+    @Inject
+    private UserDao userDao;
+
+    @Override
+    public User add(User user) {
+        return userDao.add(user);
+    }
+
+    @Override
+    public Optional<User> findByEmail(String email) {
+        return userDao.findByEmail(email);
+    }
+}

src/main/java/mate/academy/util/HashUtil.java

@@ -0,0 +1,34 @@
+package mate.academy.util;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+public class HashUtil {
+    private static final String CRYPTO_ALGORITHM = "SHA-512";
+
+    private HashUtil() {
+    }
+
+    public static byte[] getSalt() {
+        SecureRandom securerandom = new SecureRandom();
+        byte[] salt = new byte[16];
+        securerandom.nextBytes(salt);
+        return salt;
+    }
+
+    public static String hashPassword(String password, byte[] salt) {
+        StringBuilder hashedPassword = new StringBuilder();
+        try {
+            MessageDigest messageDigest = MessageDigest.getInstance(CRYPTO_ALGORITHM);
+            messageDigest.update(salt);
+            byte[] digest = messageDigest.digest(password.getBytes());
+            for (byte b : digest) {
+                hashedPassword.append(String.format("%02x", b));
+            }
+        } catch (NoSuchAlgorithmException e) {
+            throw new IllegalArgumentException("Couldn't create hash using SHA-512 algorithm", e);
+        }
+        return hashedPassword.toString();
+    }
+}