Added: email validation, email validation exception.

src/main/java/ru/team58/profileservice/controller/UserController.java

@@ -3,6 +3,7 @@ package ru.team58.profileservice.controller;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 import ru.team58.profileservice.controller.exceptions.BadRequestException;
+import ru.team58.profileservice.controller.exceptions.IncorrectEmailException;
 import ru.team58.profileservice.controller.exceptions.UnauthorizedException;
 import ru.team58.profileservice.controller.exceptions.UserNotFoundException;
 import ru.team58.profileservice.controller.schemes.CreateUserRequest;
@@ -13,6 +14,7 @@ import ru.team58.profileservice.mapper.UserMapper;
 import ru.team58.profileservice.service.UserDTO;
 import ru.team58.profileservice.service.UserService;
 import ru.team58.profileservice.service.exceptions.UserAlreadyExistsException;
+import ru.team58.profileservice.utils.EmailValidator;
 
 import java.security.Principal;
 import java.util.UUID;
@@ -73,6 +75,9 @@ public class UserController {
     public void createMe(@RequestBody CreateUserRequest request) {
         UserDTO user = UserMapper.INSTANCE.toUserDTO(request);
 
+        if (!EmailValidator.validateEmail(user.getEmail()))
+            throw new IncorrectEmailException();
+
         try {
             userService.createUser(user);
         } catch (UserAlreadyExistsException ex) {

src/main/java/ru/team58/profileservice/controller/advice/UserControllerExceptionHandler.java

@@ -37,4 +37,10 @@ public class UserControllerExceptionHandler {
         ErrorDetails errorDetails = new ErrorDetails("Unauthorized", HttpStatus.UNAUTHORIZED.value());
         return new ResponseEntity<>(errorDetails, HttpStatus.UNAUTHORIZED);
     }
+
+    @ExceptionHandler(IncorrectEmailException.class)
+    public ResponseEntity<ErrorDetails> handleIncorrectEmailException(IncorrectEmailException ex) {
+        ErrorDetails errorDetails = new ErrorDetails("Email is incorrect", HttpStatus.BAD_REQUEST.value());
+        return new ResponseEntity<>(errorDetails, HttpStatus.BAD_REQUEST);
+    }
 }

src/main/java/ru/team58/profileservice/controller/exceptions/IncorrectEmailException.java

@@ -0,0 +1,4 @@
+package ru.team58.profileservice.controller.exceptions;
+
+public class IncorrectEmailException extends BadRequestException {
+}

src/main/java/ru/team58/profileservice/utils/EmailValidator.java

@@ -0,0 +1,13 @@
+package ru.team58.profileservice.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class EmailValidator {
+    public static boolean validateEmail(String email) {
+        String regexPattern = "^(?=.{1,64}@)[A-Za-z0-9_-]+(\\.[A-Za-z0-9_-]+)*@"
+                + "[^-][A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(\\.[A-Za-z]{2,})$";
+
+        return Pattern.compile(regexPattern).matcher(email).matches();
+    }
+}