added email validation

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

@@ -13,13 +13,13 @@ public class User {
   @GeneratedValue(strategy = GenerationType.AUTO)
   private UUID id;
 
-  @Column(nullable = false, unique = true, length = 255)
+  @Column(nullable = false, length = 255)
   private String email;
 
   @Column(nullable = false, length = 255)
   private String password;
 
-  @Column(nullable = false, updatable = false, columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP")
+  @Column(nullable = false, updatable = false,insertable = false, columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP")
   private LocalDateTime regTime;
 
   public UUID getId() {

src/main/java/dev/ksan/etfoglasiserver/service/UserService.java

@@ -1,31 +1,17 @@
 package dev.ksan.etfoglasiserver.service;
 
-import dev.ksan.etfoglasiserver.dto.UserDTO;
 import dev.ksan.etfoglasiserver.model.User;
 import dev.ksan.etfoglasiserver.repository.UserRepo;
 import java.util.List;
-import java.util.Optional;
 import java.util.UUID;
-import java.util.stream.Collectors;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 @Service
 public class UserService {
   @Autowired UserRepo userRepo;
-/*
-  public List<UserDTO> getUsers() {
-    return userRepo.findAll().stream().map(this::toDTO).collect(Collectors.toList());
-  }
 
-  public UserDTO getUserById(UUID id) {
-    return userRepo.findById(id).map(this::toDTO).orElse(null);
-  }
-
-  public UserDTO toDTO(User user) {
-    return new UserDTO(user.getId(), user.getEmail());
-  }
-*/
   public List<User> getUsers() {
     System.out.println("getUsers");
     return userRepo.findAll();
@@ -35,18 +21,39 @@ public class UserService {
     return userRepo.findById(userId).orElseThrow(() -> new RuntimeException("User not found"));
   }
 
-  public void addUser(User prod) {
-    userRepo.save(prod);
+  public void addUser(User user) {
+    if(userRepo.findByEmail(user.getEmail()) != null) {
+      throw new RuntimeException("User already exists");
+    }
+    if(this.isValidEmail(user.getEmail())) {
+      userRepo.save(user);
+    }
   }
 
-  public void addNewUser(UserDTO userDTO) {
-    Optional<User> user = userRepo.findByEmail(userDTO.getEmail());
+  public void updateUser(User user) {
+
+    if(this.isValidEmail(user.getEmail())) {
+
+      userRepo.save(user);
     }
-  public void updateUser(User prod) {
-    userRepo.save(prod);
   }
 
   public void deleteUser(UUID userId) {
     userRepo.deleteById(userId);
   }
+  public boolean isValidEmail(String email) {
+    if(email == null) {
+      return false;
+    }
+    String regex = "^\\w+([-+.']\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*$";
+
+
+    if(email.length() < 256 &&email.matches(regex)){
+      System.out.println(email.length());
+      System.out.println("Email address is too long");
+      return true;
+    }
+    throw new RuntimeException("Invalid email");
+
+  }
 }